- Msepostdoc-list - ecn.purdue.edu

Seminar Reminder for Jason Bice's MS Final Exam, Nov. 14, at 12:30 in HAMP 2118; "Ultrasonic Speckle Velocimetry: The Ability to Quantify Velocity Profiles in a Couette Geometry"
by Son, Rosemary E 10 Nov '17

10 Nov '17

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Ultrasonic Speckle Velocimetry: The Ability to Quantify Velocity Profiles in a Couette Geometry" By Jason E. Bice Purdue MSE MS Final Exam Advisor: Professor Kendra A. Erk ABSTRACT Rheometry is a leading technology used to define material properties of multi-phase viscoelastic fluid-like materials, such as the shear modulus and viscosity. However, traditional rheometry relies on a mechanical response from a rotating or oscillating rotor of various geometries which does not allow for any spatial or temporal quantification of the material characteristics. Further, the setup operates under the assumption of a uniform and homogenous flow. Thus, only qualitative deductions can be realized when a complex fluid displays inhomogeneous behavior, such as wall slip or shear banding. Due to this lack of capability, non-intrusive imaging is required to define and quantify behavior that occurs in a complex fluid under shear conditions. This thesis outlines the design, fabrication, and experimental examples of an adapted ultrasonic speckle velocimetry device, which enables spatial and temporal resolution of inhomogeneous fluid behavior using ultrasound acoustics. For the experimental example, a commercial surfactant mixture (hair shampoo) was tested to show the utility and precision that Ultrasonic Speckle Velocimetry possesses. Date: Tuesday, November 14, 2017 Time: 12:30 P.M. Place: HAMP 2118

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Seminar Notice for Seonah Jin's Ph.D. Final Exam, Friday, Nov. 17, at 1:00, in HAMP 1113. "Development of Biosensor Materials for Sensitive Detection of Viral RNA and Foodborne Pathogen"
by Son, Rosemary E 10 Nov '17

10 Nov '17

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Development of Biosensor Materials for Sensitive Detection of Viral RNA and Foodborne Pathogen" By Seonah Jin Purdue MSE Ph.D. Final Exam Advisor: Professor Lia A. Stanciu ABSTRACT Pathogen detection for clinical diagnosis, vector surveillance and control is one of the important issues for public health and safety. Biosensing is considered as one of the promising techniques for pathogen detection due to its potential for rapid, simple, and relatively inexpensive detection. However, many biosensors still have limitations for commercialization. Development of materials and new detection methods are the ways to overcome these limitations. This study aims to develop rapid and sensitive material platforms for detection of the dengue viral RNA (Part I and II) and the foodborne pathogen Escherichia coli O157:H7 (Part III). The first part of the presentation will demonstrate the enhanced sensitivity of functionalized graphene oxide wrapped SiO2 particle composite (SiO2@APTES-GO) after primer immobilization for dengue DNA and RNA detection and determines selectivity and a limit of detection (LOD) below 1fM. The enhanced sensitivity is due to the increased surface area resulting from the wrapped structure of the graphene oxide (GO) layer on the silica particles, while maintaining good electrochemical properties. The second part will propose a new method for acceleration of nucleic acid hybridization. The oligonucleotide probe was neutralized by the sodium acetate treatment, which accelerated the hybridization speed and decreased the electrode incubation time from 5 hr to 30 min in low ionic strength solution. The last part of the presentation will demonstrate the sensitivities of gold-polystyrene particles (Au-PS) conjugated to antibodies. The sensitivity depended on the surface coverage and core particle size. Among all investigated conditions, the Au-PS with 0.46 µm diameter core PS, and 10% Au surface coverage showed the best sensitivity, of 5x102 CFU·mL-1 as the LOD for E. coli O157:H7 in both phosphate buffer solution and real food samples including apple juice and ground beef. This optimized surface coverage with gold nanoparticles on the submicron sized particles was the key factor for the sensitivity enhancement of lateral flow strip detection. Date: Friday, November 17, 2017 Time: 1:00 P.M. Place: HAMP 1113

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Seminar Reminder for Daniela Betancourt Jimenez's Preliminary Exam, Monday, Nov. 13, at 1:30, in ARMS B071, "Phase Change Materials as Temperature Regulators in Asphalt Pavement"
by Son, Rosemary E 10 Nov '17

10 Nov '17

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Phase Change Materials as Temperature Regulators in Asphalt Pavement" By Daniela Betancourt Jimenez Purdue MSE Ph.D. Preliminary Exam Advisor: Professor Carlos J. Martinez ABSTRACT Asphalt pavement constitute the building material for approximately 95% of the roads in the United States. However, due to the viscoelastic nature of the binder, the performance of the asphalt can be dramatically affected by extreme temperatures. The integration of phase change materials (PCMs) has been proven to be a feasible and effective way to regulate the temperature in other building materials and it's currently being investigated for asphalt applications. This report summarizes the main approaches studied for the incorporation of PCM systems in asphalt pavement materials and some of the challenges encountered in the process. It also proposes the use of a new technique for PCM microencapsulation that is believed will help overcome the problems associated with PCM encapsulation such as supercooling, low thermal conductivity and PCM leaking. It is believed that this new method will provide a viable solution to reduce asphalt distresses and delay the ice formation and snow accumulation during the winter season. Date: Monday, November 13, 2017 Time: 1:30 P.M. Place: ARMS B071

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Seminar Notice for Yiwei Sun's Ph.D., Final Exam, Thursday, Nov. 16, at 9:30 a.m., in ARMS 1021
by Son, Rosemary E 09 Nov '17

09 Nov '17

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Microstructure Evolution in 6XXX and 7XXX Aluminum Alloys During Extrusion and Related Heat Treatments" By Yiwei Sun Purdue MSE Ph.D. Final Exam Advisors: Professors David Johnson and Kevin Trumble ABSTRACT AA6XXX (Al-Mg-Si) and AA7XXX (Al-Zn-Cu-Mg) aluminum alloys are precipitation strengthened alloys with applications in construction, automotive, and aerospace industries. Manufacture procedures for these alloys include casting, homogenization treatment, deformation processing, solutionization treatment and age hardening. The present work focuses on the microstructure development during hot deformation processing (especially extrusion) as well as the related heat treatments including the pre-deformation homogenization and the post-deformation solutionization, with emphasis on phase constituents and grain structure. Extrusion is a shaping process in which the material is pushed through a die forming rods, tubes or complex profiles. For the mid and high strength alloys such as 6061 and 7050, recrystallization is undesired as it is detrimental to the mechanical properties. However, deformation involved in extrusion is highly heterogeneous, making it challenging to completely control the grain structure especially in the surface region. In the current work, a small scale extrusion setup is created, which enables more convenient examination and faster quenching of extrudate and billet discards compared with industrial extrusion. In this way, the dynamic and static microstructure evolution processes are studied separately for a clearer understanding in recrystallization and grain growth behavior of the alloy. On the other hand, recrystallization is significantly influenced by the small concentration of Zr in the alloy, which forms Al3Zr nano-particles to inhibit recrystallization. However, the size, number, spatial distribution and coherency of Al3Zr determine how effective Zr is in grain structure control. Therefore, the role of Zr in grain structure development is also investigated. The current work aims to provide deeper scientific understandings in recrystallization mechanisms and grain growth behavior associated with extrusion and heat treatments and contributes to future optimization of final product grain structure. Date: Thursday, November 16, 2017 Time: 9:30 A.M. Place: ARMS 1021

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Special Seminar Today: Speaker Professor Steve Antolovich
by Coar, Stacey L 08 Nov '17

08 Nov '17

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Seminar Reminder for Lixby Susana Diaz, Wednesday, Nov. 8, at 10:00 a.m., in ARMS 1028. "Natural Biopolymer Materials for Aptamer-based Whole Bacterial Cell Detection"
by Son, Rosemary E 07 Nov '17

07 Nov '17

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Natural Biopolymeric Materials for Aptamer-based Whole Bacterial Cell Detection" By Lixby Susana Diaz Amaya Purdue MSE Ph.D. Preliminary Exam Advisor: Professor Lia A. Stanciu ABSTRACT With a number close to 108 million people facing critical food insecurity during last year according to the FAO, Food safety becomes a real priority. Although several efforts have been made to improve the productivity of the crops, biosensors for on-site phytopathogen early detection still a research field marginally explored. Lateral flow devices represent a cost-effective promising alternative for on-site detection, but there still some concerns regarding their low sensitivity and limited range of applications. To overcome these drawbacks, the combination of gold decorated core nanoparticles coated with natural biopolymers and their application to the detection of phytopathogens could lead to a new generation of detection devices. On the other hand, aptamers' outstanding advantages as detection biomolecules over antibodies, make possible to explore virtually any target and potentially any chemical modification for its proper immobilization on the surface of label nanoparticles. All these facts together bring up promising conditions to design and develop a cost-effective and instrument-free on-site platform for the early detection of critical phytopathogens. Here, we propose the surface modification or core materials by positively charged biopolymers using layer by layer self-assembling approach and following an aptamer-based detection strategy, that will enhance the stability of gold nanoparticles and provide augmented surface contact area for higher sensitivity. Date: Wednesday, November 8, 2017 Time: 10:00 A.M. Place: ARMS 1028

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Seminar Notice for Armen Yildirim's Preliminary Exam, Tuesday, Nov. 14, 12:30 in BRK 2001. " PZT based "Z" Aligned Piezoelectric Polymer Materials for Pressure Sensor and Energy Harvesting Applications"
by Son, Rosemary E 07 Nov '17

07 Nov '17

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "PZT based "Z" Aligned Piezoelectric Polymer Materials for Pressure Sensor and Energy Harvesting Applications" By Armen Yildirim Purdue MSE Ph.D. Preliminary Exam Advisor: Professor Mukerrem Cakmak ABSTRACT Recently, the potential impacts of wearable technologies have become more evident with the introduction of the "Internet of Things" (IoT), which can basically be described as a smart network where every electronic device is connected to each other through embedded sensors and the internet. As a result, there is an increasing demand for the use of flexible, ultra-lightweight and transparent sensors and nanogenerators for self-powered electronics in several areas such as personal health monitoring, soft robotics, human inspired electronic skin (e-skin), energy harvesting and biomedical applications. In this work, we report a novel approach to produce high performance, flexible and transparent PZT/Graphene based ultra-sensitive pressure sensors and nanogenerators where particles are aligned under an AC electric field in the thickness ("Z") direction. With the E-field alignment method, the amount of particles required to develop a piezoelectric polymer material is greatly reduced. As a result, the transparency is maintained for desired applications such as touch screen interfaces. On the other hand, this method will also be the first of its kind for flexible nanogenerators and pressure sensors that is fully compatible with a continuous large-scale roll-to-roll (R2R) production line which is also designed and developed by our group. Date: Tuesday, November 14, 2017 Time: 12:30 P.M. Place: BRK 2001

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Seminar Notice for Jason Bice's MS Final Exam, Nov. 14, at 12:30 in HAMP 2118; "Ultrasonic Speckle Velocimetry: The Ability to Quantify Velocity Profiles in a Couette Geometry"
by Son, Rosemary E 07 Nov '17

07 Nov '17

Please consider attending the following: MATERIALS ENGINEERING SEMINAR "Ultrasonic Speckle Velocimetry: The Ability to Quantify Velocity Profiles in a Couette Geometry" By Jason E. Bice Purdue MSE MS Final Exam Advisor: Professor Kendra A. Erk ABSTRACT Rheometry is a leading technology used to define material properties of multi-phase viscoelastic fluid-like materials, such as the shear modulus and viscosity. However, traditional rheometry relies on a mechanical response from a rotating or oscillating rotor of various geometries which does not allow for any spatial or temporal quantification of the material characteristics. Further, the setup operates under the assumption of a uniform and homogenous flow. Thus, only qualitative deductions can be realized when a complex fluid displays inhomogeneous behavior, such as wall slip or shear banding. Due to this lack of capability, non-intrusive imaging is required to define and quantify behavior that occurs in a complex fluid under shear conditions. This thesis outlines the design, fabrication, and experimental examples of an adapted ultrasonic speckle velocimetry device, which enables spatial and temporal resolution of inhomogeneous fluid behavior using ultrasound acoustics. For the experimental example, a commercial surfactant mixture (hair shampoo) was tested to show the utility and precision that Ultrasonic Speckle Velocimetry possesses. Date: Tuesday, November 14, 2017 Time: 12:30 P.M. Place: HAMP 2118

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Fwd: FW: WO#9000385635 ARMS-Schedule of work
by Donna Bystrom 07 Nov '17

07 Nov '17

Everyone------please see the message below regarding fume hoods in the labs due to work being done in ARMS B208 today. Donna Donna, Will you please forward this email from Phil to all parties in MSE. Thanks, Tim *From:*Qualio, Phillip H *Sent:* Tuesday, November 07, 2017 9:53 AM *To:* Aynes, Jan D *Cc:* Johnson, Jack L; Crawford, M Andy; Okuniewski, Maria A; VanMeter, Timothy C; Root, Jameson; Heidrich, Shannon L; LaGuire, Jennifer L; Crain, Lisa M; Reagan, David C.; Martinez, Jorge L; Folkerts, Jill A; Womack, Richard O *Subject:* RE: WO#9000385635 ARMS-Schedule of work Thanks Jan! I have copied our laboratory technicians and safety folks so they are aware that the fume hoods throughout the building may go into a low-flow alarm while this work is being performed. _This will not affect the hoods performance_. Please let us know what the specific timeline will be for this work. Thanks, Phil Qualio Building Deputy Neil Armstrong Hall of Engineering Potter Engineering Center 765.496.9757 — 765.494.7020 *From:* Aynes, Jan D *Sent:* Tuesday, November 07, 2017 9:34 AM *To:* Qualio, Phillip H <pqualio(a)purdue.edu <mailto:pqualio@purdue.edu>> *Cc:* Johnson, Jack L <jljohnson(a)purdue.edu <mailto:jljohnson@purdue.edu>>; Crawford, M Andy <macrawford(a)purdue.edu <mailto:macrawford@purdue.edu>>; Okuniewski, Maria A <mokuniew(a)purdue.edu <mailto:mokuniew@purdue.edu>> *Subject:* WO#9000385635 ARMS-Schedule of work Scott Fix and I had a discussion this morning about the project taking place in room B208. My concern was that during the disconnection and reconnection of the exhaust pipe, that low pressure alarms may be triggered on any other hoods that are on the same trunk line. I have the hoods in rooms B206, B214 and B208 scheduled and ready to be down for a couple days. But I need to communicate this to any other labs that their low pressure alarms may go off but that it wont effect their hood performance. I will try and stop in and talk with you this afternoon. Thanks

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Fwd: Biophysics Seminar - Professor Gundlach
by Donna Bystrom 06 Nov '17

06 Nov '17

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