FW: A*STAR IMRE : Upcoming Research Seminars and Events - as of 17 Jan 14

[Tan Wei Lin]

Sincerely,
Tan Wei Lin

Research Engineer
DSO National Laboratories
20 Science Park Drive, Singapore 118230
Tel: (65) 6796-8262

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From: Jofelyn Lye Mei Lian (S3) [lye...@scei.a-star.edu.sg]
Sent: Friday, January 17, 2014 5:49 PM
Subject: A*STAR IMRE : Upcoming Research Seminars and Events - as of 17 Jan 14

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Mon, 20 Jan 14 10:00 am – 11:00 am   IMRE, Seminar Room 2

IMRE Seminar on “Using Morphology and Structure to Tune Solid-State Thermal Properties” Speaker : Dr. Kedar Hippalgaonkar Host : Dr. Teng Jinghua (PF) Phonon transport in nanostructured materials has been a subject of intense interest and we used micro-fabricated platforms to measure the thermal conductivity of nanowires.  In this work, we extend this platform to probe material structure and provide a direct correlation to their thermal properties.  In the first part, we show how morphology, characterized with Transmission Electron Microscopy, can affect thermal transport in single-crystalline Silicon Nanowires.  Specifically, we show how surface roughness reduces thermal conductivity to values lower than the diffusive limit, as low as 5 W/m-K (bulk Silicon has a thermal conductivity ~140 W/m-K). Secondly, we study thermal anisotropy in Bismuth, where nanowires grown in different crystal orientations exhibit markedly different properties.  Finally, we demonstrate up to 22% tunable thermal rectification in tapered Vanadium Oxide beams. In this rich material system, differences in oxygen stoichiometry can result in either metallic or insulating phases. We use nano-Auger and Near Field Optical Spectroscopy to probe their surface structure and learn more about their electrical and thermal transport characteristics.   (Click here for more information and registration)

Tue, 21 Jan 14 11:00 am – 12:00 pm   IMRE, Seminar Room 1

IMRE Seminar on “Multi-Functionality of Reinforced Polymers and Composite Structures” Speaker : Prof. Klaus Friedrich Host : Dr. He Chaobin (SI) Multi-functionality is the combination of different properties in one material so as to make it suitable for the use in applications in which different loading conditions must be sustained. Besides the mechanical load bearing capacity, other properties such as thermal stability, electrical conductivity or wear resistance can be of importance. In many cases, polymer based composites are the material of choice, since they can combine the intrinsic properties of the polymers (like light weight, corrosion resistance or toughness) with the unique properties of their reinforcements (such as electrical conductivity, wear resistance, or high mechanical stiffness and strength) The present contribution illustrates how multi-functionality can be achieved in reinforced polymers and composite structures, using different types of polymer matrices and various nano-sized and micro-sized fillers, reinforcements or coatings. Besides the principle concepts, various case studies are represented, illustrating different processing routes how to achieve various property combinations for different specific applications. The latter include high temperature thermoplastic based composites for sliding wear loaded components, carbon nanotube/short fiber reinforced thermoplastics used for electrically conductive parts, film coated composites structures, in which high stiffness and strength together with high surface erosion resistance are required (e.g. wind energy rotor blades), and high temperature thermosetting coatings for reducing sliding friction and wear of automotive engine pistons, etc.     (Click here for more information and registration)

 

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For a full listing of the seminars and workshops, please proceed to http://www.imre.a-star.edu.sg/eventsall.php

  

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