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by Donna Bystrom 20 Nov '12

20 Nov '12

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SEMINAR NOTICE: B. Saha, Mon. 11/26, 4:00 pm, BIRK 2001
by Stacey, Lisa A 16 Nov '12

16 Nov '12

MATERIALS SCIENCE AND ENGINEERING SEMINAR InGaAs/InAlAs Heterostructures and Superlattices: An All-Semiconductor Mid-infrared Optical Metamaterial by Bivas Saha Ph.D. Prelim Exam Part I Advisor: Prof. T. Sands ABSTRACT The studies of optical phenomena in nanoscale materials have generated tremendous enthusiasm among researchers in recent years. Metamaterials that have artificial structural elements designed to achieve unusual electromagnetic properties are currently being investigated widely to achieve negative refraction, sub wavelength imaging, density of states engineering and other exotic optical phenomenon. In this talk, I will present an all semiconductor metamaterial based on InGaAs/InAlAs multilayers and superlattices that show negative refraction in the Mid-IR range. The theory behind negative refraction in layered metamaterials is reviewed briefly before discussing the optical characterization and more specifically the negative refraction. Further research into new material systems that might show similar effect and other interesting optical properties are also proposed. Date: Monday, November 26, 2012 Time: 4:00 P.M. Place: BIRK 2001 PURDUE MSE [cid:image003.png@01CDC409.CADF6440] Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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SEMINAR NOTICE: H-C Lu, Ph.D. Final Exam, Mon. 11/26/12, 11:30 AM, ARMS 1103
by Stacey, Lisa A 15 Nov '12

15 Nov '12

MATERIALS SCIENCE AND ENGINEERING SEMINAR UV-cured Adhesives for Carbon Fiber Composite Applications by Hsiao-Chun Lu Ph.D. Final Exam Advisor: Prof. J. Youngblood ABSTRACT Carbon fiber composite materials are used in aerospace, marine and transportation industries due to their high strength-to-weight ratio. However, due to their brittle characteristic, these structures are vulnerable to physical damage, such as a bird strike or impact damage. The repair after damage occurs is important. UV-based adhesives were evaluated to provide good adhesion in a short operation time. Different patch systems with UV-based adhesives were applied to repair composite materials in order to obtain optimal properties. In addition, new UV-based adhesives were formulated and characterized for fast and reliable repair. Date: Monday, November 26, 2012 Time: 11:30 A.M. Place: ARMS 1103 PURDUE MSE [cid:image003.png@01CDC33B.31179BD0] Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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FW: PETER G. WINCHELL LECTURE SEMINAR - S. VISCO, TUES. NOV. 27th, 9:00 am
by Stacey, Lisa A 13 Nov '12

13 Nov '12

Please see the attached announcement for our next distinguished Winchell Series speaker, Dr. Steven Visco, co-sponsored with School of Chemical Engineering. Note: The lecture is at 9:00 am in FRNY G140 with a Reception prior to the lecture at 8:30 am in the Henson Atrium. Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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Fwd: Food Harvest Food Drive ends this Friday
by Donna Bystrom 13 Nov '12

13 Nov '12

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SEMINAR REMINDER - A. Rosenberger, PhD Prelim Exam Pt I, Wed. 11/14/12, 11:30 AM, HAMP 2107
by Stacey, Lisa A 13 Nov '12

13 Nov '12

(PLEASE NOTE SEMINAR LOCATION OUTSIDE OF ARMS) MATERIALS SCIENCE AND ENGINEERING SEMINAR Processing and Mechanical Properties of Silicon Nitride Nanoceramics by Andrew Rosenberger Ph.D. Prelim Exam - Part I Advisor: Prof. L. Stanciu ABSTRACT Silicon nitride is an engineering ceramic in limited use as components for automotive and aerospace applications. Reducing the grain size from the micron scale to the nanocrystalline level offers possibilities of enabling alternate processing techniques and enhancing mechanical properties. Experimental research has overcome the various processing and sintering difficulties necessary to produce silicon nitride nanoceramics and found significant improvements in hardness, wear resistance, and superplasticity. These improvements were attributed mainly to the reduced flaw size and enhancement of grain boundary sliding. Theoretical models have also been developed which describe possible mechanisms for improved toughness, but their applicability to actual materials is uncertain. Further research into microstructure control on the nanometer scale is proposed, as are methods to verify and apply the theoretical models of deformation. Date: Wednesday, November 14, 2012 Time: 11:30 A.M. Place: HAMP 2107 Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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SEMINAR REMINDER TODAY - L. Syarbaini, Ph.D. Prelim Exam Pt. I, Mon. 11/12/12, 3:30 PM, ARMS 3115
by Stacey, Lisa A 12 Nov '12

12 Nov '12

MATERIALS SCIENCE AND ENGINEERING SEMINAR The Influence of Metal Catalysts on Orientation and Growth of Germanium Nanowires by Luthfia Syarbaini Ph.D. Prelim Exam - Part I Advisor: Prof. C. Handwerker ABSTRACT Germanium (Ge) nanowires for use in transistors and electronic interconnects are being studied due to their one-dimensional growth and low growth temperatures in the presence of metal catalyst particles and appealing properties such as band-gap energy and high carrier mobility. Understanding the orientation effects on growth can potentially lead to the improved control of nanowire geometry and properties. The specific metal catalyst material has been reported to affect the nanowire orientation grown from silicon substrates. Among the various growth methods, such as vapor-liquid-solid (VLS), self-catalytic, and vapor-solid-solid (VSS), VSS growth demonstrates more control of the nanowire growth orientation. In this review, an analysis of the influence of metal catalyst material on orientation for the VSS and VLS methods is performed. Although there have been reports on orientation effects using metal catalysts, there has not been a systematic study of these effects with controlled growth parameters, including substrate, growth temperature and partial pressure. The study proposed here will focus on the influence of gold and copper metal catalyst type on VSS-grown Ge nanowires and their effects on orientation. Of particular interest, the solid Cu metal catalyst transforms into Cu3Ge while the Au metal catalyst does not change phase. The crystal structures of two solid catalysts and their orientation relationships with growing Ge nanowires will be studied to characterize the orientation and the underlying effects on Ge nanowire growth. Date: Monday, November 12, 2012 Time: 3:30 P.M. Place: ARMS 3115 Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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Fwd: PPDA #39 News
by Donna Bystrom 12 Nov '12

12 Nov '12

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Coffee/Brownies/Cookies
by Stacey, Lisa A 09 Nov '12

09 Nov '12

In case you need a little boost to the end of your week/beginning of your weekend, there are leftover seminar cookies/brownies & coffee in the kitchen. I'll run down at 5 to dump remaining coffee. Thanks, Lisa Stacey Secretary/Development Assistant Purdue University School of Materials Engineering 765/494-4100

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Fwd: PPDA November Social Interest
by Donna Bystrom 09 Nov '12

09 Nov '12

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