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Faculty Symposium on Micro/Nano-technologies for healthcare, ON BEHALF OF TIM SANDS
by Deborah S. Starewich 08 Apr '08

08 Apr '08

Dear Colleague- I'd like to call your attention to a Faculty Symposium entitled "Tiny Technologies for Huge Impacts on Health," to be held on Friday, April 11th from 10-12 in B071 Armstrong. This faculty symposium is part of the President's inauguration program. Although the discussions will be targeted at a lay audience, we would welcome the participation of faculty, students and staff. Please advertise as you see fit (flyer attached), and attend if you can. We are hoping for a lively exchange! Regards- Tim Sands Mary Jo and Robert L. Kirk Director Birck Nanotechnology Center

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WEEKLY MEMO
by Deborah S. Starewich 07 Apr '08

07 Apr '08

WEEKLY MEMO, April 7, 2008 ********* 1. KUDOS ********* 1.1: Congratulations to ISAAC WILDESON (ECE/BNC), winner of one of the prestigious National Defense Science and Engineering Graduate (NDSEG) Fellowships. 1.2: WENSHAN CAI received one of the 2007 Chinese Government Awards for Outstanding Students Abroad; these awards are among the highest awards to recognize the academic achievements among Chinese students abroad. This award was established to encourage research excellence among Chinese overseas students across all fields of study. Each winner receives a special certificate along with a US$5000 cash award. ****************** 2. ANNOUNCEMENTS ****************** 2.1: *****2nd Annual BNC RESEARCH REVIEW,***** Monday, April 14th, 2008, 1:00PM, MRGN 121. Program to include TIM SANDS, “The Birck Nanotechnology Center – Progress, Opportunities, and Challenges”; EVGENII NARIMANOV, “Metamaterials for Future Photonics”; DONALD BERGSTROM, “Carbon Nanotubes as Nucleic Acid Carriers”; GERHARD KLIMECK, “nanoHUB – Future Cyberinfrastructure Serving over 60,000 Users Today”; JAYATHI MURTHY, “An Introduction to PRISM and MEMS Simulation”; and DAVID JANES, “Thin-Film Electronics Using Nanowire Transistors.” A POSTER REVIEW and SESSION will also be included in this year’s activities. Visit www.nano.purdue.edu <http://www.nano.purdue.edu> for the most up-to-date information regarding this year’s Annual Research Review. ******PARTICIPANT RECEPTION****** 5:30, Birck Atrium, 2nd floor: PIZZA, PIZZA, PIZZA 2.2: Purdue Spring Fest this weekend: April 12 and 13. 2.3: Card reader system: Work has begun on the installation of the BNC card reader system. This project will take several weeks and includes wiring each BNC lab door for card swipe entry. Researchers at Birck can expect to see electricians in their labs and in some cases may be asked to briefly suspend experiments as ceiling tiles are removed and wiring is run through the lab. Some cutting and grinding can also be expected as the card readers are mounted on each lab door. APRIL 7 – 11: installation will begin on the 2nd Floor West Lab Wing (Rooms 22XX). Depending on the speed of the work, a tentative schedule is set: — Mon & Tues (04/07 - 04/08): BRK 2261, 2277, 2283, 2217 — Wed & Thurs (04/09 - 04/10): BRK 2221, 2233, 2239 If you have any issues or concerns please contract Mary Jo or Mark Voorhis. 2.4: Keep our community refrigerator running J We had repair service out for the refrigerator in our kitchen this past week. Luckily, we do not have any mechanical problems at this time. One suggestion: please be sure that any items (i.e., plastic bags) do not come between the seal of the doors and the outside of the refrigerator. We should also be running on a power level of about 4; I believe we’ve been using 7. At the end of the semester, we will schedule a shut down and start up of this appliance that so many in our building use. ******************** 3. TOURS/VISITORS ******************** 3.1: Monday, April 7, 10:30: Chuck Wallrodt, ECE alumnus 3.2: Wednesday, April 9, 9:15AM: Dhiraj Malkani and Christopher Baldwin, RockPort Capital Partners 3.3: Wednesday, April 9, 11:15AM: Dr. Murali Sastry 3.4: Wednesday, April 9, 3:30PM: Dave Brown, Intel, ECE guest 3.5: Thursday, April 10, 2:00PM: Mr. Dick Heron, College of Agriculture guest 3.6: Friday, April 11, 8:30AM: Dr. John G. Gilligan, University Vice Chancellor for Research and Graduate Studies, Professor of Nuclear Engineering, North Carolina State University; and Dr. Charles Rutledge, Purdue University. 3.7: Friday, April 11, 2:00PM: Southwest Chicago Christian School 3.8: Friday, April 11, 2:30PM: Purdue Alumni Association guests 3.9: Saturday, April 12, all day: Springfest, Open House Tours ******************** 4. SEMINARS ******************** 4.1: Wednesday, April 9, 2008, 10:45 refreshments, 11:00 seminar, ARMS 1109: “Materials Issues in Supercritical Water Oxidation of Chemical Wastes,” by Ronald M. Latanision ABSTRACT: There is a need to destroy both military and civilian hazardous wastes and an urgency, mandated by public concern over the traditional waste handling methodologies, to identify safe and efficient alternative technologies. One very effective process for the destruction of such wastes is supercritical water oxidation (SCWO). By capitalizing on the properties of water above its critical point, this technology provides rapid and complete destruction of a wide variety of wastes. A major limitation to full scale commercialization of SCWO is the corrosion of the materials of construction of these engineering systems. In this presentation, forensic analysis of failures in nickel-based alloy preheater tubes exposed to methylene chloride feed solutions will be shown to provide a basis for understanding the thermodynamic conditions under which SCWO reactors can be operated successfully. BIO: Ronald M. Latanision is a Corporate Vice President and Director of Exponent’s Mechanics and Materials practice. Prior to joining Exponent, he was the Director of The H.H. Uhlig Corrosion Laboratory in the Department of Materials Science and Engineering at M.I.T., and held joint faculty appointments in the Departments of Materials Science and Engineering, and Nuclear Engineering. He is now an Emeritus Professor at MIT. He is a member of the National Academy of Engineering; and a Fellow of ASM International, NACE International, and the AAAS. From 1983–1988, Dr. Latanision was the first holder of the Shell Distinguished Chair in Materials Science. He was a founder of Altran Materials Engineering Corporation, established in 1992, and led the Materials Processing Center at MIT as its Director from 1985 to 1991. In June of 2002, Dr. Latanision was appointed by President Bush to membership on the U.S. Nuclear Waste Technical Review Board. Dr. Latanision's research interests are focused largely in materials processing, and corrosion of materials in aqueous (ambient as well as high temperature and pressure) environments. He specializes in corrosion science and engineering with emphasis on materials selection for contemporary and advanced engineering systems and in failure analysis. His expertise extends to electrochemical systems and processing technologies, ranging from fuel cells and batteries to supercritical water power generation and waste destruction. Specific research interests include stress corrosion cracking, hydrogen embrittlement, water and ionic permeation through thin polymer films, photoelectrochemistry, and aging phenomena/life prediction in engineering materials and systems. Dr. Latanision is a member of the International Corrosion Council and serves as Co-Editor-in-Chief of Corrosion Reviews. 4.2: Wednesday, April 9, 2008, 3:30, MRGN 121: “Nanobiotechnology: A Different Perspective,” by Murali Sastry ABSTRACT: The study of the synthesis, exotic properties, assembly/packaging and potential commercial application of nanomaterials is an extremely important topic of research that is expected to have far-reaching global impact. The focus of my talk will be on an emerging branch of nanotechnology that derives its inspiration from biology. Recognizing that some of the most exquisite and highly functional nanomaterials are grown by biological systems (examples include silica by diatoms and magnetic nanoparticles by magnetotactic bacteria (1), many researchers have focused attention on understanding how inorganic materials are made by biological systems and attempting to replicate such processes in the lab. In my laboratory, we have investigated the use of plant organisms such as fungi in the synthesis of nanomaterials over a range of chemical compositions that include metals [2], metal sulfides (3) and oxides (4). An exciting development is the use of plant extracts in nanoparticle synthesis (5) wherein large concentrations of gold nanotriangles have been obtained that have potential application in cancer hyperthermia. Organisms such as fungi are not normally exposed to metal precursor stresses that they should be capable of a broad range of biochemical transformations to negate these stresses is useful in materials chemistry and throws up exciting possibilities. Recently, we have also shown that bacteria may be 'trained' to synthesize magnetite when challenged with suitable iron complexes under aerobic conditions (6). References: [1] Sarikaya, M. Proc. Natl. Acad. Sci. USA, 1999, 96, 14183; [2] Mukherjee, P et al., Angew. Chem. 2001, 40, 3585; [3] Ahmed, A. et al., J. Am. Chem. Soc, 2002, 124, 12108; [4] Bansal et al., Adv. Mater. 2005, 17 889; Bharde et al., Small 2006, 2 135; [5] Shankar, S.S. et al., Nature materials 2004, 3, 482; [6] Bharde et al., J. Am. Chem. Soc. 2005, 127, 9326. BIO: Dr Murali Sastry, chief scientist at the Tata Chemicals Innovation Centre, Pune, India, has an M.Sc. in Physics and a PhD (in thin film technology) from the prestigious Indian Institute of Technology (IIT) Madras (now Chennai, 1987). He was a postdoctoral fellow at the International Centre for Theoretical Physics at Trieste, Italy (1988-1991); visiting faculty at CNRS in Orsay, France (2001-2003) and at the University of Maryland at College Park, USA (1998-99); as well as a federation fellow at RMIT, Melbourne (2006) and DAE professor at Central University, Hyderabad (2006). Counted among the world's top 15 nanobiotechnologists, Dr. Sastry has close to 25 years of research experience. A true interdisciplinary scientist, he joined Tata Chemicals in 2005, after creating a centre for nanotechnology at the renowned National Chemical Laboratory (NCL), Pune. Having authored over 300 international publications, 10 chapters in books and 15 Indian and US patents, he has a number of national and international awards to his credit including India's most prestigious award in science, the Shanti Swarup Bhatnagar Prize in Chemistry (2003). Editor (Nanomaterials) for the Materials Research Bulletin(Elsevier), Dr. Sastry serves on the international advisory boards of seven leading chemistry journals, having earlier served on advisory boards for the Department of Biotechnology, the Department of Science and Technology, the Presidential Nanotechnology Committee and the Council of Scientific and Industrial Research (CSIR), Government of India. Dr. Sastry's current research interests include interfacing biologicals with inorganic nanomaterials, understanding biological process in their nanodimensions, developing new industrially relevant renewable materials and green processes, as well as ethical issues in application of nanomaterials. 4.3: Friday, April 11, 2008, 10:00AM, Pfendler Hall of Agriculture: “Building a New Planet,” Panel Discussion: Moira Gunn, Moderator; Kirk Alter, Hugh Hillhouse, Inez Hua, Valentine Moghadam, Robin Mills Ridgway, Paul Shepson, Jerry Shively, Panelists; www.purdue.edu/inauguration/events.php <http://www.purdue.edu/inauguration/events.php> 4.4: Friday, April 11, 2008, 10:00AM, ARMS B071: “Tiny Technologies for Huge Impacts on Health,” Panel Discussion: Tim Sands, Moderator; John Hertig, Joseph Irudayaraj, James Leary, Alyssa Panitch, Jenna Rickus, Masa Rao, Panelists; www.purdue.edu/inauguration/events.php <http://www.purdue.edu/inauguration/events.php> 4.4: Friday, April 11, 2008, 3:30 refreshments, 3:45 seminar, ARMS 1010: “Synthesis, Characterization, and Performance of Nanocrystalline Diamond Coatings for Micro End Mills,” Frank Pfefferkorn, Assistant Professor, Mechanical Engineering, Univ of Wisconsin-Madison ABSTRACT: Micro end milling is a method of creating net-shaped functional micro parts, micro molds, and prototypes with tools ranging from 5 to 500 mm diameter. This technology complements standard silicon-based microfabrication processes with its ability to directly produce true 3D structures with high accuracy, low cost, and short cycle time in most engineering materials. However, the small flexural stiffness, strength, hardness, and friction coefficient of the tool (usually tungsten carbide) limit the efficiency of machining. To enable a significant increase in productivity requires higher feedrates (mm/min) as well as longer and more predictable tool life. One method of improving the performance of micro end mills that is being investigated at UW-Madison will be presented: ultra-thin nanocrystalline diamond coatings. Most micro end mills are made of tungsten carbide (WC) with cobalt binder and have difficulty machining adhesive metals (e.g., aluminum and copper) and very hard materials (e.g., ceramics and high-silicon aluminum alloys). Evidence that thin diamond coatings can dramatically enhance the performance of micrometer-scale cutting tools will be presented. The approach for coating 300 mm diameter tungsten carbide (WC) micro end mills using a tailored seeding method and hot filament chemical vapor deposition (HFCVD) will be presented. This method results in uniform, conformal, and continuous diamond coatings less than 2 mm in both thickness and grain size with greater 90% sp3 (diamond) bonds. The performance of the uncoated and coated tools has been evaluated by dry machining channels in 6061-T6 aluminum. The test results demonstrate far lower tool wear and breakage, much lower adhesion of aluminum to the tool, and significantly lower cutting forces for the coated tools. The coatings achieve a more predictable surface finish and enable dry machining with little or no burr formation. The improved performance of the coated tools is a result of the superior tribological properties of fine-grained diamond against aluminum, specifically low friction, low adhesion, and low wear of the film. The method of NCD coating failure, due to delamination, will be presented and methods being investigated to mitigate it discussed. BIO: Frank Pfefferkorn is an Assistant Professor in the Department of Mechanical Engineering at the University of Wisconsin-Madison since 2003. He received his Ph.D. in Mechanical Engineering from Purdue University in 2002 on the topic of laser-assisted machining of ceramics. Prior to his appointment in Madison, Frank was a Postdoctoral Research Associate in the Nanoscale Thermo-Fluids Laboratory at Purdue University. The goal of Frank’s research is to develop and apply a science-based understanding of manufacturing processes (heat transfer, material behavior, machinability, tribology, etc.) in order to increase performance and offer new and improved manufacturing tools to industry. He is studying NCD-coating micro end mills in collaboration with Robert Carpick (Penn) and Anirudha Sumant (Argonne). He also has active projects on laser-assisted micro end milling of metals and ceramics, laser micro polishing, laser-assisted friction stir welding, thermal efficiency of thermally-assisted manufacturing, heat transfer in micromechanical machining, and thermal control of friction stir welding. Frank’s research has been funded by the National Science Foundation, ONR, the State of Wisconsin, and industrial collaborators. Frank has received a Research Initiation Award and the 2007 Kuo K. Wang Outstanding Young Manufacturing Engineer Award from the Society of Manufacturing Engineers. **************** 5. OPPORTUNITIES **************** 5.1: Postdoctoral Position at PURDUE AVAILABLE on Photovoltaic Device Fabrication and Development Applications are invited for a postdoctoral position to work on the development of 3rd generation solar cells based on novel nanostructured materials recently patented by Purdue. The successful applicant will have a PhD in electrical engineering, materials science, chemistry or physics and should be motivated, independent, and creative. Prior experience with device fabrication and testing is sought. In addition, expertise in photovoltaics, light emitting diodes, or other optoelectronic devices is a plus but is not required. The Purdue technology has been licensed by private investors and a company is being formed. The initial appointment will be a one-year academic postdoctoral position, but based on performance and success, there will be an option to join the company and have equity in the company. To apply, please send a current CV that includes a list of your publications and the contact information for three references. Also, please indicate the earliest date you would be available. This information should be sent to Prof. Hugh W. Hillhouse (hugh(a)ecn.purdue.edu) 5.2: Society for Biological Engineering (SBE)’s 4th International Conference on Bioengineering and Nanotechnology (ICBN), cosponsored by the Science Foundation of Ireland and AIChE’s Nanoscale Science and Engineering Forum, will be held at the University College, Dublin, Ireland, on July 22-24, 2008. Deadline for abstract submissions is 15 April. Visit http://aiche.confex.com/aiche/ICBN08/cfp.cgi for additional information. 5.3: Possible seminar? Please contact me if you would be interested in learning about “Real-time In-situ Sizing of Nanoparticle Aerosols Using Differential Mobility Analysis.” ABSTRACT for proposed seminar: The benefits of sizing aerosolized submicrometer particles using differential mobility analysis have been well documented. The National Institute of Standards and Technology (NIST) has been using this method to measure 0.1 μm Standard Reference Material (SRM) particles for well over a decade [1]. This technique has unsurpassed accuracy, especially for nanometer sizes and has a reported uncertainty of approximately 1% of the particle size [2,3]. Lately, differential mobility analysis is finding increased use in the in-situ near real-time sizing of engineered nanoparticles synthesized by a variety of dry-synthesis (aerosol-based) processes like diffusion flame synthesis, spray pyrolysis, thermal plasma, microplasma synthesis, etc [3-7]. An in-situ measurement eliminates the need for sample collection for off-line analysis thus minimizing operator error and providing more consistent and repeatable results. Real-time measurement permits the user to follow dynamics of particle formation and growth in highly reacting flows, thus providing the necessary feedback to control particle size precisely. Scanning Mobility Particle SizerTM (SMPS) spectrometers integrate differential mobility analysis with condensation particle counting to provide near real-time (as fast as 1 min) size distribution of aerosolized particles in the size range of 2.5-1000 nm. This seminar provides a brief overview of the technologies, followed by a review of case studies in aerosol based nanoparticle synthesis. Additionally, a discussion on sampling challenges and remedial measures will be presented. Offered through TSI Incorporated, 500 Cordigan Road, Shoreview MN; contact Paul Leslie, paul.leslie(a)tsi.com

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Shutdown status - CLEANROOM OPEN, LABS OPEN
by Deborah S. Starewich 04 Apr '08

04 Apr '08

The general exhaust and scrubbed exhaust maintenance activities in BNC have been successfully completed. All exhaust and toxic gas monitoring is now operational. Solvent hoods, acid hoods, vacuum systems, and all gases can be used as normal. Please note that the individual equipment will come on-line on a staggered schedule. Certain tools, such as the evaporators, may take a significant amount of time to bring back into function. Please check Coral for each equipment status. Thanks to everyone for your cooperation during this semester's PM Shutdown and your efforts to ensure that our maintenance workers remained safe at all times. Sincerely -- BNC Staff

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Birck 2nd Annual Research Review
by Deborah S. Starewich 03 Apr '08

03 Apr '08

It appears that my previous message may have been delivered to some mailboxes without the information (the message was delivered to my mailbox with both an inserted picture and as an attachment). In any event, I've attached the info here. Deborah

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Birck 2nd Annual Research Review
by Deborah S. Starewich 03 Apr '08

03 Apr '08

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Shutdown status - CLEANROOM OPEN, LIMITED PROCESSING
by John Weaver 02 Apr '08

02 Apr '08

The scrubbed exhaust maintenance activities in the cleanroom have been successfully completed, and the scrubbed exhaust is now operational. The general exhaust, however, is still not functional. This affects solvent hoods, vacuum systems, and the hydrogen generator. A follow-up e-mail will alert you when the remaining systems are operational. We are anticipating that this will be approximately noon Friday. The laboratories will be closing Thursday morning at 8:00 AM. Please note that the individual equipment will be coming up after the cleanroom startup. Certain tools, such as the evaporators, may take a significant amount of time to bring back into function. Please check Coral for equipment status. John Weaver John R. Weaver Facility Manager Birck Nanotechnology Center Purdue University (765) 494-5494 jrweaver(a)purdue.edu

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MONDAY MEMO
by Deborah S. Starewich 31 Mar '08

31 Mar '08

WEEKLY MEMO, March 31, 2008 ********* 1. KUDOS ********* 1.1: KALAPI BISWAS wins a Graduate Student Silver Award at the Spring MRS meeting held in San Francisco. Her award was presented a ceremony held on Wednesday (03.26.08) evening. The award prizes consist of $400 and a presentation plaque for the Gold Awards and $200 and a certificate for the Silver Awards. All finalists also received a waiver of the meeting registration fee and a one-year MRS student membership commencing July 1, 2008. Kalapi won with her presentation, ³LL5.2: Bi2Te3 Nanowire Composites for Thermoelectric Devices.² A complete list of the winners is located at http://www.mrs.org/s_mrs/doc.asp?CID=12356&DID=201572 <http://www.mrs.org/s_mrs/doc.asp?CID=12356&DID=201572> 1.2: VIJAY RAWAT and KALAPI BISWAS win first prize in two categories, ³Best Presentation² and ³Best Poster,² for their poster ³Novel thermoelectric materials and devices for waste heat harvesting" during Pugwash's third annual Midwest Regional Conference, ³Energy and the Environment: Powering the Future Responsibility." ***************** 2. ANNOUNCEMENTS ***************** 2.1: 2nd Annual BNC Research Review, Monday, April 14th, 2008, 1:00PM, MRGN 121. I hope you can attend. Program to include Tim Sands, ³The Birck Nanotechnology Center Progress, Opportunities, and Challenges²; Evgenii Narimanov, ³Metamaterials for Future Photonics²; Donald Bergstrom, ³Carbon Nanotubes as Nucleic Acid Carriers²; Gerhard Klimeck, ³nanoHUB Future Cyberinfrastructure Serving over 60,000 Users Today²; Jayathi Murthy, ³An Introduction to PRISM and MEMS Simulation²; and David Janes on nanoelectronics. A poster review and session will also be included in this year¹s activities. Visit www.nano.purdue.edu <http://www.nano.purdue.edu> for the most up-to-date information regarding this year¹s Annual Research Review. 2.2: ******REMINDER****** CLEANROOM AND LAB PREVENTATIVE MAINTENANCE SCHEDULE: MONDAY, 03.31.08 TO FRIDAY, 04.04.08 Monday, 03.31.08, 10:00 AM: All materials must be removed from cleanroom solvent hoods. Monday, 03.31.08, 4:00 PM: All materials must be removed from the remaining cleanroom hoods. CLEANROOM CLOSED. Tuesday, 04.01.08 7:30 AM: No ultrapure water available. No acid processing in laboratories. No hazardous gases available. CLEANROOM CLOSED. Wednesday, 04.02.08, all day: No ultrapure water available. No acid processing in laboratories. No hazardous gases available. Wednesday, 04.02.08, 4:00 PM: All materials must be removed from laboratory hoods (including biosafety cabinets; all bio materials must be removed from exhausted enclosures). Thursday, 04.03.08, 8:00 AM: Cleanroom will re-open, barring unforeseen circumstances. All solvent hoods and processes will remain down for general exhaust upgrades. LABORATORIES CLOSED. Thursday, 04.03.08 Friday, 04.04.08, 8:00 AM: Laboratories will re-open and Cleanroom general exhaust should be operational, barring unforeseen circumstances. Questions or comments? Contact Mark Voorhis (mvoorhis(a)purdue.edu) 2.3: Indiana Health Industry Form: ³Innovention 08 Improving the Value of Healthcare; Connecting the Industry Like Never Before!² July 28-29, 2008, Indiana Convention Center. Registration opens April 1, 2008. For more information and event updates, please visit www.ihif.org <http://www.ihif.org> . ******************** 3. SEMINARS ******************** 3.1: Wednesday, April 2, 2008, 6:00PM, MRGN 121: Bioethics Seminar, ³Conflicts of Interest in Biomedicine,² by David Resnik. Issues surrounding conflicts of interest and the commercialization of research are both timely and vital to Purdue¹s research community. BIO: Dr. Resnik is the Bioethicist for the NIH and the NIEHS. His extensive experience and publication record both in philosophy and in the sciences promise this to be a very interesting talk! More information, including Resnik¹s CV, is available online at www.purdue.edu/bioethics <file://www.purdue.edu/bioethics>. 3.2: Friday, April 4, 2008, 3:30 refreshments, 3:45 sminar, ARMS 1010: ³Laser Weldability of Nickel and Cobalt Based Alloys,² by Henry J. White, Haynes International, Kokomo, IN ABSTRACT: For nearly a century, arc welding has been the primary technique used to join both nickel and cobalt based alloys. The advantages (excellent corrosion resistance, increased productivity, etc.) of a deep and narrow weld geometry with a limited heat affected zone led to the first detailed study of laser welding of Hastelloy® and other nickel based alloys- Welding Journal 1986. A modification of the ³Weeter Laser Weldability Test² was used to evaluate eighteen commercially available and five experimental alloys produced by Haynes International. The original test involves drilling a matrix of holes of various diameters (0.343 to 0.572 mm) and depths (0.127 to 0.508 mm) in the material. Then a laser (Nd- YAG, CO2, Fiber, etc.) is used to make spot welds in the drilled holes. A laser spot size greater than the drilled hole diameter is selected so that the absence of metal in the drilled hole causes the solidified spot weld to have a concave contour. By varying the depth and width of the drilled hole the weld restraint and the depth of the cavity resulting from the solidified spot weld changes. By measuring the depth of the cavity at which the alloy exhibits incipient cracking, ³Weeter index², a rating of the material¹s weldability is obtained. In this study a ramp (depth from 0.127 to 0.508 mm) / taper (width from 0.343 to 0.572 mm) geometry was machined into each specimen. A Fiber Laser (IPG Photonics) was used to produce an autogeneous bead on plate weld in the ramp/ taper region. A laser spot size, greater than the restraint area, was used to ensure that the resulting cavity assumes a concave contour. As in the original test procedure, the cavity depth at which the alloy exhibits incipient cracking was measured/ recorded and used as a rating of the material¹s weldability. We will report on the laser weldability of corrosion resistant (Hastelloy B-3®, C-4, C-22®, C-276, C-2000®, G-3, G-30®, G-35®), high temperature (Haynes® 25, HR-120®, HR-160®, 188, 230®, 242®, 282®, 556®, 625, Hastelloy X), and five experimental alloys which have been/ will be used in the chemical, hygienic, aerospace, and the automotive industries. We will compare these test results with Varestraint Testing (a technique used to evaluate the arc weldability of materials) done on the same materials and comment on hot cracking propensity/ mechanisms. SHORT BIO: Dr. Henry J. White, a Registered Professional Engineer in the State of Indiana, joined Haynes International in 2007 as Welding Metallurgist/ Senior Staff Engineer. He has a B.S. in Metallurgical Engineering from Polytechnic University, M.S. in Materials Science and Engineering (Welding Metallurgy) from The University of Tennessee, Knoxville, and Ph.D. in Materials Science and Engineering from SUNY Stony Brook. After completing his BS, Dr. White worked as a Metallurgical Engineering for ABB Lummus Global where he developed/ reviewed welding procedure specification/ procedure qualification records and selected material of construction for Ethylene, Styrene, and Maleic Anhydride petrochemical plants. After completing his MS, Dr. White worked for Misonix Incorporated as a Materials Engineer where he developed welding procedures and selected materials for ultrasonic medical instrumentation. While in graduate school, Dr. White managed the heat treatment facilities for Skyo Industries Inc. a mill to market torsion tool manufacturer. At Skyo Industries Inc., Dr. White designed new materials and heat treatment procedures to improve and maintain tool quality. Dr. White was a member of the faculty in the Materials Science and Engineering Department at Stony Brook University from 1996-2007. During this period he was an National Science Foundation Career Awardee, Chairman of the Metro NY/ NJ Chapter of the American Society of Materials International, Accreditation Board of Engineering & Technology Materials Science and Engineering Program Evaluator, and Subject Matter Expert for the National Council of Examiners for Engineering and Surveying. He continues to participate in the later two activities. *********************** 4. DISCOVERY PARK NEWS *********************** 4.1: Burton Morgan building: security procedures adjusted: Effective March 31st, the building will be locked at 6:00 p.m. There will no longer be a student hired to ³sit² in the building. When events are scheduled in the building during the evenings or weekends, Denny Heath will hire students from the Purdue Security and Safety Patrol (PSSP) as needed to keep an eye on the facility. There will be a charge for this service, which runs ~$10.00/hour with a minimum charge of $30.00. If a DP Staff Member will be acting as the guest liaison for your event and wants to assume the responsibility for building security we would need to know this at the time the room reservation is made. In these instances, we would not need to hire the student patrol. All groups outside of Discovery Park will automatically be required to use the student patrol service. When a late reservation request is made (1-2 weeks), and a PSSP cannot be hired due to student availability, the building doors will be locked at 6pm. It will be the responsibility of the guest liaison to make arrangements to gain access to the building and to open the main doors for their attendees. These arrangements can be made through Denny Heath and/or Valerie Lawless. These procedures are consistent with University Policy and will help us safeguard the facility. Reservations should be requested by e-mail to Ruth Ann Weiderhaft at weiderhaft(a)purdue.edu. The request should include the name of the group, date/time # of people, and room requested. When events and meetings are scheduled in the building outside of regular hours, Ruth Ann Weiderhaft will forward a request to Denny Heath and Valerie Lawless to keep the building unlocked for the meeting time. This will also be the time when patrol students will be requested as needed.

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*One last reminder: This semester's BNC Preventative Maintenance Shutdown begins MONDAY. (03/31/08 - 04/04/08)*
by Deborah S. Starewich 28 Mar '08

28 Mar '08

*Please make sure your experiments are secured and chemicals have been cleaned up. Details below.* CLEANROOM AND LAB PREVENTATIVE MAINTENANCE SCHEDULE: MONDAY, 03.31.08 TO FRIDAY, 04.04.08 Monday, 03.31.08, 10:00 AM: All materials must be removed from cleanroom solvent hoods. Monday, 03.31.08, 4:00 PM: All materials must be removed from the remaining cleanroom hoods. CLEANROOM CLOSED. Tuesday, 04.01.08 7:30 AM: No ultrapure water available. No acid processing in laboratories. No hazardous gases available. CLEANROOM CLOSED. Wednesday, 04.02.08, all day: No ultrapure water available. No acid processing in laboratories. No hazardous gases available. Wednesday, 04.02.08, 4:00 PM: All materials must be removed from laboratory hoods (including biosafety cabinets; all bio materials must be removed from exhausted enclosures). Thursday, 04.03.08, 8:00 AM: Cleanroom will re-open, barring unforeseen circumstances. All solvent hoods and processes will remain down for general exhaust upgrades. LABORATORIES CLOSED. Thursday, 04.03.08 Friday, 04.04.08, Noon: Laboratories will re-open and Cleanroom general exhaust should be operational, barring unforeseen circumstances. ***Questions or comments? Contact Mark Voorhis (mvoorhis(a)purdue.edu)***

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Spring Fest at Discovery Park, ON BEHALF OF DP ENGAGEMENT
by Deborah S. Starewich 26 Mar '08

26 Mar '08

This message is being forwarded at the request of Valerie Lawless. Contact Valerie with any questions, concerns, to volunteer, etc. [dpengage(a)purdue.edu] Greetings, This will be the first year for Discovery Park to participate in the 10th annual Spring Fest at Purdue University (most popularly known for ³Bug Bowl²). This message is two-fold, with the first encouraging all Discovery Park faculty and staff to bring their families on Saturday April 12th, 2008 from 10am-4pm to Spring Fest and Discovery Park. We will be hosting a variety of activities within all four buildings and will offer tours at 11am and 3pm, beginning in MRGN 121 with the overview video. This is a GREAT opportunity for your families to see what is you do at Discovery Park and to see the facilities, while interacting with exciting games and give-aways. We are encouraging each center to participate in some way for Spring Fest; whether it is a poster of information about your center/project, or contributing towards an activity. The excited faces you see and the conversations that are created is just the beginning of why I am encouraging everyone to make an effort in being at Spring Fest. For this year to be successful, I will need everyone¹s help, no matter how big or small. Several people have already contributed their time and efforts in preparation for Spring Fest with posters, fliers, games, and suggestions. Thank you to all of you!! We really need your help to make this first year one of the best years for Discovery Park! Here is how you can help: Please let me know if you will be able to help in one or more of the following areas. If you can only stay for an hour, or half hour, all of your help is appreciated! You also may not have to stay for the entire time it will depend upon what is accomplished for that segment. Lunch will be provided for you! If you qualify for overtime, those hours will be paid, but I will need to know ahead of time that you will be working and what times. Saturday April 12th, 2008: 10:00 a.m. 4:00 p.m. Setup (8:00 a.m. 10:00 a.m.) -Need 5 volunteers Faculty and Staff working activities (10:00 a.m. 4:00 p.m.) -Each center to provide 1-2 people to work a minimum of 1 hour at an activity of your choice. Please see the attached flier where activities will be located. Tour Guides 1 for 11:00 a.m. 12:00 p.m. 1 for 3:00 p.m. 4:00 p.m. *Show overview video in MRGN 121 and guide folks through all 4 buildings Extra Support Staff -Need 4-5 people to stay for the majority of the day and will shift stations Cleanup (3:30 p.m. 5:30 p.m.) -Need 4-5 people As you can see, this will take the work of many hands to make this a success and I hope to count on you! You can still bring your family as well we encourage everyone to see what is happening at Discovery Park! If you would like to help spread the word about Spring Fest to the community, please let me know and I will provide the fliers for you. If you have any questions, please let me know. Go Boilers!! Valerie Valerie Lawless Engagement Operations Manager Purdue University Discovery Park Burton D. Morgan, MRGN 120H 1201 West State Street West Lafayette, IN 47907 Ph: 765-494-3662 Cell: 765-426-4607 Fax: 765-494-9870 Email: dpengage(a)purdue.edu *If you would like to visit Discovery Park, please send a request to dpengage(a)purdue.edu <mailto:dpengage@purdue.edu> . Thank You!

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WEEKLY MEMO: week of 03.24.08
by Deborah S. Starewich 25 Mar '08

25 Mar '08

WEEKLY MEMO, March 24, 2008 **************** 1. Announcements **************** 1.1: ******REMINDER****** HAPPENING NEXT WEEK: CLEANROOM AND LAB PREVENTATIVE MAINTENANCE SCHEDULE: *******MONDAY, 03.31.08 TO FRIDAY, 04.04.08********** Monday, 03.31.08, 10:00 AM: All materials must be removed from cleanroom solvent hoods. Monday, 03.31.08, 4:00 PM: All materials must be removed from the remaining cleanroom hoods. CLEANROOM CLOSED. Tuesday, 04.01.08 7:30 AM: No ultrapure water available. No acid processing in laboratories. No hazardous gases available. CLEANROOM CLOSED. Wednesday, 04.02.08, all day: No ultrapure water available. No acid processing in laboratories. No hazardous gases available. Wednesday, 04.02.08, 4:00 PM: All materials must be removed from laboratory hoods (including biosafety cabinets; all bio materials must be removed from exhausted enclosures). Thursday, 04.03.08, 8:00 AM: Cleanroom will re-open, barring unforeseen circumstances. All solvent hoods and processes will remain down for general exhaust upgrades. LABORATORIES CLOSED. Thursday, 04.03.08 Friday, 04.04.08, 8:00 AM: Laboratories will re-open and Cleanroom general exhaust should be operational, barring unforeseen circumstances. Questions or comments? Contact Mark Voorhis (mvoorhis(a)purdue.edu) 1.2: Autoclave Training for the month of March registration is online. Class size is limited to 5 people. Friday, March 28, 2008, 4-5PM: Register here: http://www.itap.purdue.edu/training/registration/?offeringid=2688 <http://www.itap.purdue.edu/training/registration/?offeringid=2688> To register, click on the link and log in using your career account. The description of the course pops up and is called ³Getinge Autoclave Training.² Click on ³Register for this course.² The registration page will come up. Make sure your contact information is correct and click on ³Submit.² You will receive a confirmation in your email for this class. Christy Cooper will offer her training in either April or May and may be at different times and days according to what best fits her schedule. She will send an email at the appropriate time regarding her classes. Christy and I have both agreed that we will try offering this course every other week for the rest of the Spring Semester. This will help streamline our time so that we can concentrate on our research and other responsibilities. Contact Lisa Reece, 66786, 532.5932; lreece(a)purdue.edu with any questions or concerns. 1.3: Kitchen refrigerator to be cleaned on Friday, 03.21.08. Please be sure that anything you want kept is dated. In addition, please take any items home that you don¹t want put into the trash. Thanks for your cooperation in keeping our kitchen clean and sanitary. ******************** 2. TOURS/VISITORS ******************** 2.1: Monday, 03.24.08, 1:00-3:00: Purdue¹s for Me visitors admitted students and parents; please make them feel welcome, 2.2: Thursday, 03.27.08, 2:30PM, BRK 1001: Cummins Engine 2.3: Friday, 03.28.08, 12:00PM lunch BRK Atrium, 1:00PM tour: ECE Graduate Open House 2.4: Friday, 03.28.08, 2:00-5:00PM, BRK Atrium: Medicinal Chemistry and Pharmacology Poster Session ******************** 3. SEMINARS ******************** 3.1: Friday, 03.28.08, 10:30AM, BRK 1001: ³Actuation and Cooling of Micro/Nano Mechanical System Based on Electro or Opto-Mechanical Coupling,² by Joel Chevrier, Grenoble University. ABSTRACT: Fabrication of Nano-Electro-Mechanical-Systems (NEMS) of high quality is nowadays extremely efficient. These NEMS will be used as sensors and actuators in integrated systems. Their use however raises questions about their interface (actuation, detection, read out) with external detection and control systems. Their operation implies many fundamental questions related to single particle effects such as Coulomb blockade, light matter interactions such as radiation pressure, thermal effects, Casimir forces and the coupling of nanosystems to external world (thermal fluctuations, back action effect). Here we specifically present how the thermal fluctuations of an oscillating cantilever can be damped using three radically different ways: i) an electro-mechanical coupling in the presence of a strong Johnson noise ii) an external feedback control of thermal fluctuations. This is the cold damping. It is closely related to Maxwell's demon iii) a cavity Fabry Perot induced photothermal pressure that can quench the brownian vibrational fluctuations of an AFM lever. This shows how the interplay between MEMS or NEMS external control and their coupling to a thermal bath can lead to a wealth of effects that are nowadays extensively studied in different areas. 3.2: Friday, 03.28.08, 3:30 refreshments; 3:45 seminar, ARMS 1010: ³Getting the Pb Out: Whisker and Hillock Growth from Sn Electrodeposits,² William J. Boettinger, Metallurgy Division, NIST. ABSTRACT: For many years, electronic component leads made of Cu alloys were ³pretinned² with a 3 to 10 micron layer of electrodeposited tin-lead (Sn-Pb) alloy to maintain proper solder wetting during subsequent assembly. The worldwide electronics industry is in the process of removing Pb from their components. When Pb is removed from the electroplated surface finishes, Sn whiskers grow spontaneously from the surface finish. The whiskers are single crystal filaments typically 1 µm in diameter and several mm long. Numerous electronic failures due to shorting from whiskers have been reported, especially in the high reliability realm of aerospace, military, and medical device applications. This lecture will describe progress being made towards developing a fundamental understanding of Sn whisker growth and providing industry with information needed for mitigation strategies. See http://nepp.nasa.gov/whisker/ <http://nepp.nasa.gov/whisker/> for general information about the Sn whisker problem. BIO: William J. Boettinger is a NIST Fellow in the Metallurgy Division of the Materials Science and Engineering Laboratory at NIST in Gaithersburg, MD. He earned a B.E.S. (Mechanics) in 1968 and a Ph.D. (Metallurgy) in 1972 from The Johns Hopkins University. Before joining the permanent staff at NIST, he was a NRC/NAE postdoctoral research associate at NIST from 1972-1974. From 1977 until 1995 he held a concurrent position as a professorial lecturer at the George Washington University where he taught a graduate course in phase transformations. His expertise includes the thermodynamics and kinetics of metallurgical systems especially the relationship of alloy microstructure to processing conditions. He has over one hundred fifty publications on topics including dendritic, eutectic and peritectic solidification, rapid solidification, phase diagrams, diffusion, intermetallic compounds, measurement of crystal perfection using x-rays, and soldering. Research with J. A. Warren on phase field modeling of solidification was recognized in the 11 May 1995 issue of Nature.¹ Dr. Boettinger was awarded the Department of Commerce Bronze Medal in 1980, Silver Medals in 1983 and 1994, and Gold Medals in 1999 and 2003. He received the Materials Science Division Award of the American Society for Materials (ASM) in 1989 and was made a fellow of that society in 1994. He co-chaired the 1994 Physical Metallurgy Gordon Research Conference with J. H. Perepezko. He has received several honors from The Minerals, Metals and Materials Society (TMS): the 1999 Champion Mathewson Best Paper Award, the 2001 TMS Bruce Chalmers Award for research in solidification and a Fellow in 2006. He was named a NIST Fellow in 2001, elected a member of the National Academy of Engineering in 2006 and received the federal government¹s Presidential Rank Award in 2007. **************** 4. OPPORTUNITIES **************** 4.1: Four Available Positions of Foreign English Teachers: South China Agricultural University (SCAU) (http://english.scau.edu.cn/) in Guangzhou, China, is seeking qualified foreign English teachers. Starting work date: End of August, 2008. Courses to teach: English grammar, Reading, Oral English, English writing. Requirements: Native-English speaker, Bachelor¹s degree in the field of language; 2 letters of recommendation from prior employers; Minimum 2-year teaching experience. SCAU will provide: Monthly income 7500~8000 Yuan (RMB) which covers salary, lodging and traveling expenses, Salary is commensurate with experience and degree, Paid holidays depending on working duration. Please send your application letter/resume/photo /and your contact telephone number to E-mail: anne(a)scau.edu.cn/ <mailto:anne@scau.edu.cn/> xinrongw@scau.edu.cn/wangscau@126.com, we will only contact the proper candidate for interview. ********************* 5. LIFE ON THE OUTSIDE ********************* 5.1: April 19 and May 3 Fundraising Event: Area residents and Purdue students will soon put their cabin fever aside to do handiwork during a fundraising event to help a Purdue student. The Purdue student from Noblesville was diagnosed in February with a rare from of cancer. His friends and family are rallying behind him to provide support by organizing a fundraiser to help defray medical costs that are being incurred by the family. For $50 per person, volunteers will work up to five hours (9 a.m. to 2 p.m.) on Saturday, April 19 and again on May 3. Potential jobs include yard work, painting, building fences and cleaning out garages/basements. To date, there are 100 volunteers taking part. Jobs will be filled on a first-come basis. This is a great opportunity for area residents to do some spring cleaning and also help with this important project. Many students have said they are eager to help so this fundraiser will allow them to show their support and make a difference for this family. To request a volunteer, simply contact Amy Noah at arnoah(a)purdue.edu or at 765-479-3917.

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