June 2019 - Msepostdoc-list

MSE Soft Materials Summer Research Symposium
by Davis, Chelsea S 29 Jul '20

29 Jul '20

All, The 7th Annual Soft Materials Summer Research Symposium will be held this summer on Tuesday mornings at 11am in ARMS 1028. This weekly symposium will feature one or two short research talks by graduate students early in their research careers here at Purdue. All are welcome to attend. The full summer schedule is attached to this email. Please feel free to share this announcement with any colleagues or students that you think might be interested in attending. We look forward to seeing you there. Sincerely, Prof. Chelsea Davis Chelsea Davis, Ph.D.<https://polymerinterfacialmechanics.com/> Assistant Professor School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering Room 2229 701 West Stadium Drive West Lafayette, IN 47907 Tel: (765) 494-9216<tel:(765)%20494-9216> Fax: (765) 494-1204<tel:(765)%20494-1204> [https://www.purdue.edu/brand/images/Purdue_University-150_Years_of_Giant_Le…] www.purdue.edu/giantleaps

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[TODAY] Sandia seminar and recruitment opportunity
by Coar, Stacey L 27 Jun '19

27 Jun '19

Dear all, This is a reminder about the Sandia seminar today. 1:30 PM, Thursday, June 27, 2019 Seng-Liang Wang Hall, Room 1004 Please see below for a seminar and recruitment event from Sandia National Laboratories. You may be aware that Sandia National Laboratories is hiring a large number this next year. Dr. Nowlin is looking for a few potential candidates for staff positions in microelectronics technology development, reliability or radiation effects. If interested, you will have the opportunity to speak to Dr. Nowlin after his seminar. ----------------------------------------------------------------- Advanced Microsystems Radiation Effects R&D at Sandia National Laboratories Dr. Nathan Nowlin Sandia National Laboratories 1:30 PM, Thursday, June 27, 2019 Seng-Liang Wang Hall, Room 1004 Sandia National Laboratories (SNL) develops advanced technologies to ensure global peace. We are called upon by our Nation to conduct leading-edge national-security research in the physics, modeling, hardening, and hardness assurance, and development of advanced microsystems, microelectronics, photonics, optoelectronics, micro-electrical-mechanical, and heterogeneously integrated circuits in Silicon CMOS, compound semiconductors and other materials and devices in harsh radiation environments. Dr. Nowlin, from the Advanced Microsystems Radiation Effects department, will describe recent research his team has reported on the development of radiation hardened technologies manufactured at SNL, as well as new work in the radiation hardness assurance of advanced integrated circuits from leading commercial manufacturers. Dr. Nathan Nowlin has 25 years experience in advanced microelectronics and radiation effects research. In his early career, he co-discovered the Enhanced Low Dose Rate Sensitivity (ELDRS) effect in bipolar transistors. He then spent several years in the semiconductor industry developing high voltage Lateral Drain MOS (LDMOS) process technology and leading yield engineering for a high-speed BiCMOS technology. In the early 2000’s, he went to work for Mission Research Corporation, where he led the development of a 90nm Radiation Hardened By Design (RHBD) library and SRAM compiler for spacecraft Application Specific Integrated Circuit (ASIC) designs. In his 10 years at Sandia, Dr. Nowlin has led research and development efforts for radiation hardening by design, advanced circuit modeling of radiation effects, and product engineering for high reliability, high consequence systems. Dr. Nowlin was a product realization team lead for 10 ASIC products, developing requirements, demonstrating prototypes, and initiating production for all aspects from wafer manufacturing, packaging, test, reliability, and radiation performance. His efforts enabled Sandia to successfully begin its largest ASIC production mission in its history. Dr. Nowlin now leads the Advanced Microsystems Radiation Effects department where he is responsible for trust and radiation hardness assurance of microsystems for national security applications. Dr. Nowlin is a Senior Member of the IEEE Nuclear and Plasma Sciences Society (NPSS), has authored or co-authored 21 papers, and serves on the organizing committees for the Nuclear and Space Radiation Effects Conference (NSREC) and the Hardened Electronics And Radiation Technologies (HEART) technical interchange meeting. Xufeng

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Workshop today on Analytical solution of diffusion equation- ARMS 1028/11:30
by Coar, Stacey L 26 Jun '19

26 Jun '19

From: Coar, Stacey L Sent: Monday, June 24, 2019 11:02 AM To: 'msefaculty-list(a)ecn.purdue.edu' <msefaculty-list(a)ecn.purdue.edu>; 'msegradstudent-list(a)ecn.purdue.edu' <msegradstudent-list(a)ecn.purdue.edu>; 'msepostdoc-list(a)ecn.purdue.edu' <msepostdoc-list(a)ecn.purdue.edu> Subject: Workshop starting today on Diffusion in Solids with an Emphasis on Multicomponent Diffusion Importance: High [cid:image001.jpg@01D52C0D.07B5F560] Stacey Stacey Coar Secretary/Development Assistant School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2300 West Lafayette, IN 47907 765-494-4100 scoar(a)purdue.edu<mailto:scoar@purdue.edu>

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FW: Seminar Notice for Aline M. Elquist MS Final Exam. Seminar, Thursday, June 27, 12:00 p.m., in HAMP G212; Exam same day at 11:30, in HAMP G212. " Instantaneous Antimicrobial Susceptibility Testing Using Piezoelectric Sensors"
by Coar, Stacey L 26 Jun '19

26 Jun '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Instantaneous Antimicrobial Susceptibility Testing Using Piezoelectric Sensors" By Aline M. Elquist Purdue MSE MS Final Exam Advisors: Professor Na Lu and Professor Rodney W. Trice ABSTRACT Rapid determination of drugs effective against bacterial strains is critically important to stopping further spread of an infection and reducing antibiotic resistance. Antimicrobial susceptibility testing (AST) is done to determine what type of antibiotic and what concentration will be effective in treating an infection. Current, growth-dependent, AST methods are reliant on the growth rate of the bacteria and can take several days to several weeks to get results. A piezoelectric plate sensor can be used to measure an instant change in the minute physiological stresses of the bacteria cells when they are exposed to an effective concentration of antibiotic. This work aims to investigate the feasibility of piezoelectric plate sensors used for instantons AST (iAST) results and develop a road map for implementation of this technology into a clinical lab setting. Four Clinical and Laboratory Standards Institute (CLSI) quality control strains of bacteria were tested with a wide range of antibiotics from various drug classes using the piezoelectric sensor. Results were obtained within 30 minutes and compared to standard of care AST methods used in clinical labs, and CLSI prescribed ranges for each strain of bacteria. Aside from bacteria, mycobacteria and fungi were tested using the piezoelectric plate sensor to show this technology can be extended to categorizing various microorganisms. This thesis will also discuss a roadmap to fabricate more scalable sensors, and challenges associated with the different sensor designs. Date: Thursday, June 27, 2019 Time: 12:00 PM Place: HAMP G212

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Workshop starting today on Diffusion in Solids with an Emphasis on Multicomponent Diffusion
by Coar, Stacey L 24 Jun '19

24 Jun '19

[cid:image002.jpg@01D52A7C.3F4E6030] Stacey Stacey Coar Secretary/Development Assistant School of Materials Engineering Purdue University Neil Armstrong Hall of Engineering 701 West Stadium Ave. Room 2300 West Lafayette, IN 47907 765-494-4100 scoar(a)purdue.edu<mailto:scoar@purdue.edu>

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Seminar Reminder for Nelyan López Pérez's Ph.D. Final Exam. Seminar Monday, June 24, at 10:30 a.m., in ARMS 1028. Exam same day at 11:30 a.m., in ARMS 2237. “Detection of Early Stages of Degradation on PPTA Fibers Through the Use of Positron Annihilati
by Son, Rosemary E 21 Jun '19

21 Jun '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR “Detection of Early Stages of Degradation on PPTA Fibers Through the Use of Positron Annihilation Lifetime Spectroscopy” By Nelyan López Pérez Purdue MSE Ph.D. Final Exam Advisor: Professor John A. Howarter ABSTRACT High-performance fibers used for ballistic protection are characterized by having outstanding mechanical properties such high modulus and strength. These mechanical properties are granted by the fiber’s chemical and physical structure as well as their high degree of orientation. Twaron fibers are one of the most commonly used fibers on soft body armors such as bulletproof vests. They are made from poly (p-phenylene terephthalamide) (PPTA), a rigid-rod and highly crystalline polymer. Although these fibers are crystalline and have great mechanical properties, their performance can decrease when they are exposed to different degradation factors. Free volume is the unoccupied space between the polymer molecules. It is responsible for characteristics such as diffusion and viscosity. Hence, the free volume changes as the polymer degrades. This thesis focuses on the effects of sonication, pH changes, and sweat on the free volume of PPTA fibers. A non-destructive technique known as positron annihilation lifetime spectroscopy (PALS) was used to measure the free volume in PPTA. Changes in the free volume of fibers degraded under different conditions were compared to their mechanical performance. Degradation in DI water, pH 4 and pH 10 aqueous solutions was conducted for 10 weeks at 80oC. Sweat degradation of PPTA fibers was also conducted for 10 weeks at 25oC, 50oC, and 100oC. Fibers degraded in pH4 and sweat solutions had greater loss of mechanical performance and changes in the free volume. PALS was able to detect changes in the nanostructure of PPTA fibers at early stages of degradation. This data was supported by mechanical tests and is complementary to other characterization techniques such as small angle X-ray scattering (SAXS). Results of this research are a stepping stone for future studies on lifetime predictions of bulletproof vests and the development of the next generation of soft body armors. Date: Monday, June 24, 2019 Time: 10:30 A.M. Place: ARMS 1028

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FW: Sandia Truman and Hruby Fellowship Announcement Requires US Citizenship
by Son, Rosemary E 18 Jun '19

18 Jun '19

Please share the following opportunities with your PhD students who recently graduated or will have graduated by October 2020. US Citizenship Required. Deadline November 1, 2019. Begin forwarded message: From: "Hoover, Marcey" <mlhoove(a)sandia.gov<mailto:mlhoove@sandia.gov>> To: "Chiang, Mung" <chiang(a)purdue.edu<mailto:chiang@purdue.edu>>, "Crawford, Melba M" <mcrawford(a)purdue.edu<mailto:mcrawford@purdue.edu>>, "Hacker, Thomas J" <tjhacker(a)purdue.edu<mailto:tjhacker@purdue.edu>> Cc: "DeLaurentis, Dan (External Contact)" <ddelaure(a)purdue.edu<mailto:ddelaure@purdue.edu>>, "Patel, Kamlesh D" <kdpatel(a)sandia.gov<mailto:kdpatel@sandia.gov>>, "Rasmus, Joel A." <jrasmus(a)purdue.edu<mailto:jrasmus@purdue.edu>> Subject: Sandia Truman and Hruby Fellowship Announcement Mung and Melba, Sandia National Laboratories is beginning its campaign to attract qualified candidates for the Harry S. Truman Fellowship and Jill Hruby Fellowship in National Security Science and Engineering. The deadline for applying is November 1, 2019. Attached are flyers that can be shared, encouraging qualified individuals to apply. The Fellowships are three-year appointments. Recipients conduct independent research that supports Sandia's national security mission; the Hruby Fellows also participate in a leadership development program that will prepare them for career advancement in their field. Please encourage your top PhD students in science or engineering to apply. Please share this information with PhD students, deans, department chairs, faculty, research center directors, graduate studies offices, fellowship offices, and professional societies. I am also sending this information to Dean Wolfe and Dean Bertoline, and am copying CERIAS (Joel Rasmus) and iGSDI (Dan DeLaurentis) on this email. Fellows may work at either principal Sandia location, Albuquerque, NM or Livermore, CA. The salary is $111,200. Candidates must be able to obtain a security clearance, which requires US citizenship, and be seeking their first national laboratory appointment. They must have been awarded a PhD within three years at the time of application or will have completed all PhD requirements by commencement of the appointment (October 2020). Our web sites provide additional information on steps required to apply: Truman Fellowship: http://www.sandia.gov/careers/students_postdocs/fellowships/truman_fellowsh…; contact Yolanda Moreno (ymoreno(a)sandia.gov<mailto:ymoreno@sandia.gov>) Hruby Fellowship: http://www.sandia.gov/careers/students_postdocs/fellowships/hruby_fellowshi…; contact Kelly S. Collins (ksmithc(a)sandia.gov<mailto:ksmithc@sandia.gov>). Thanks in advance for your help in sharing these opportunities. Marcey ******************************************* Marcey Hoover, PhD Director, Quality Assurance Sandia National Laboratories P.O. Box 5800 MS-0469 Albuquerque, New Mexico 87185 Office: 505-844-9424 Mobile: 505-803-1796 Email: mlhoove(a)sandia.gov<mailto:mlhoove@sandia.gov> *******************************************

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Seminar Notice for Aline M. Elquist MS Final Exam. Seminar, Thursday, June 27, 12:00 p.m., in HAMP G212; Exam same day at 11:30, in HAMP G212. " Instantaneous Antimicrobial Susceptibility Testing Using Piezoelectric Sensors"
by Son, Rosemary E 18 Jun '19

18 Jun '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Instantaneous Antimicrobial Susceptibility Testing Using Piezoelectric Sensors" By Aline M. Elquist Purdue MSE MS Final Exam Advisors: Professor Na Lu and Professor Rodney W. Trice ABSTRACT Rapid determination of drugs effective against bacterial strains is critically important to stopping further spread of an infection and reducing antibiotic resistance. Antimicrobial susceptibility testing (AST) is done to determine what type of antibiotic and what concentration will be effective in treating an infection. Current, growth-dependent, AST methods are reliant on the growth rate of the bacteria and can take several days to several weeks to get results. A piezoelectric plate sensor can be used to measure an instant change in the minute physiological stresses of the bacteria cells when they are exposed to an effective concentration of antibiotic. This work aims to investigate the feasibility of piezoelectric plate sensors used for instantons AST (iAST) results and develop a road map for implementation of this technology into a clinical lab setting. Four Clinical and Laboratory Standards Institute (CLSI) quality control strains of bacteria were tested with a wide range of antibiotics from various drug classes using the piezoelectric sensor. Results were obtained within 30 minutes and compared to standard of care AST methods used in clinical labs, and CLSI prescribed ranges for each strain of bacteria. Aside from bacteria, mycobacteria and fungi were tested using the piezoelectric plate sensor to show this technology can be extended to categorizing various microorganisms. This thesis will also discuss a roadmap to fabricate more scalable sensors, and challenges associated with the different sensor designs. Date: Thursday, June 27, 2019 Time: 12:00 PM Place: HAMP G212

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Food in Kitchen area
by Son, Rosemary E 18 Jun '19

18 Jun '19

Hi All, There was a lunch and some food is left over. It is available to you on a first come first serve basis. Best, Rosemary

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Seminar Notice for Nelyan López Pérez's Ph.D. Final Exam. Seminar Monday, June 24, at 10:30 a.m., in ARMS 1028. Exam same day at 11:30 a.m., in ARMS 2237. “Detection of Early Stages of Degradation on PPTA Fibers Through the Use of Positron Annihilation L
by Son, Rosemary E 17 Jun '19

17 Jun '19

Please consider attending the following: MATERIALS ENGINEERING SEMINAR “Detection of Early Stages of Degradation on PPTA Fibers Through the Use of Positron Annihilation Lifetime Spectroscopy” By Nelyan López Pérez Purdue MSE Ph.D. Final Exam Advisor: Professor John A. Howarter ABSTRACT High-performance fibers used for ballistic protection are characterized by having outstanding mechanical properties such high modulus and strength. These mechanical properties are granted by the fiber’s chemical and physical structure as well as their high degree of orientation. Twaron fibers are one of the most commonly used fibers on soft body armors such as bulletproof vests. They are made from poly (p-phenylene terephthalamide) (PPTA), a rigid-rod and highly crystalline polymer. Although these fibers are crystalline and have great mechanical properties, their performance can decrease when they are exposed to different degradation factors. Free volume is the unoccupied space between the polymer molecules. It is responsible for characteristics such as diffusion and viscosity. Hence, the free volume changes as the polymer degrades. This thesis focuses on the effects of sonication, pH changes, and sweat on the free volume of PPTA fibers. A non-destructive technique known as positron annihilation lifetime spectroscopy (PALS) was used to measure the free volume in PPTA. Changes in the free volume of fibers degraded under different conditions were compared to their mechanical performance. Degradation in DI water, pH 4 and pH 10 aqueous solutions was conducted for 10 weeks at 80oC. Sweat degradation of PPTA fibers was also conducted for 10 weeks at 25oC, 50oC, and 100oC. Fibers degraded in pH4 and sweat solutions had greater loss of mechanical performance and changes in the free volume. PALS was able to detect changes in the nanostructure of PPTA fibers at early stages of degradation. This data was supported by mechanical tests and is complementary to other characterization techniques such as small angle X-ray scattering (SAXS). Results of this research are a stepping stone for future studies on lifetime predictions of bulletproof vests and the development of the next generation of soft body armors. Date: Monday, June 24, 2019 Time: 10:30 A.M. Place: ARMS 1028

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