Template Assisted Synthesis of Polythiophene Nanostructures Towards Their Application as Thermal Interface Materials

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dc.contributor.author Singh, Virendra
dc.date.accessioned 2011-11-15T22:33:40Z
dc.date.available 2011-11-15T22:33:40Z
dc.date.issued 2011-10-25
dc.identifier.uri http://hdl.handle.net/1853/42004
dc.description Virendra Singh presented a lecture at the Nano@Tech Meeting on October 25, 2011 at 12 noon in room 1116 of the Marcus Nanotechnology Building. en_US
dc.description Dr. Virendra Singh is Post-doctoral Research Associate in the Nano Engineered System and Transport (NEST) laboratory in the School of Mechanical Engineering. He received his MS and M. Phil degrees, both in Analytical Chemistry, from the Indian Institute of Technology, Roorkee, India; and Ph.D. in Physical Chemistry from Panjab University, Chandigarh, India. In 2007, after completion of his Ph.D., he moved to Georgia Tech. He was a postdoc in Chemical Engineering with Prof. Behrens from 2007 to 2009, before joining the NEST lab. He has taught several courses as a visiting lecturer and has over 16 publications in refereed journals and proceedings. His current research interests include fabrication and characterization of conjugated polymer and conjugated polymer-CNT hybrid nanostructures, electrochemical polymerization/deposition, and CNT dispersion in non-aqueous solvents.
dc.description Runtime: 44:15 minutes
dc.description.abstract Since the realization of the electrical conductivity in conjugated polymers during the late seventies, this class of organic materials has received growing attention due to their technological applications. In addition to their attractive processing properties associated with conventional polymers, conjugated polymers have both electrical and optical properties similar to those of metals and inorganic semiconductors. Similar to traditional non-conjugated polymers, conjugated polymers possess a very low intrinsic thermal conductivity (~ 0.2 W m-1 K-1). Defects in bulk polymers such as chain entanglements, voids, and impurities lead to a significant number of phonon scattering sites that impede heat transfer. The utility of these polymers as thermal interface materials depends largely on (i) the directional carrier mobility through the polymer chain (ii) the contact area and resistance between polymer and surfaces. Further, the alignment of polymer chains with enhanced molecular and superamolecular order at the nanoscale can reduce defects and improve the mechanical strength and thermal/electrical conductivity in the direction of alignment significantly. This presentation will cover the template assisted fabrication of conjugated polymer (polythiophene) nanostructures towards enhanced molecular ordering within nanostructures. The polythiophene (Pth) nanostructures of diameters ~ 200 nm and length up to tens of micron were grown potentiostatically using a three electrode electrochemical cell and a hard nanoporous template. The important fabrication parameters to control the morphology of nanostructures will also be discussed. A photoacoustic (PA) technique was used to measure the thermal resistances of Pth nanotube arrays dry-adhered to a substrate to form the interface. The total thermal resistance of a Pth nanotube interface was measured to be as low as ~ 1 mm2K/W, which is significantly less than the measured resistances for state of art thermal adhesives. en_US
dc.format.extent 44:15 minutes
dc.language.iso en_US en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Electronics en_US
dc.subject Materials en_US
dc.subject Nanoscale en_US
dc.subject Nanotechnology en_US
dc.title Template Assisted Synthesis of Polythiophene Nanostructures Towards Their Application as Thermal Interface Materials en_US
dc.title.alternative Polythiophene Nanostructures as Thermal Interface Materials en_US
dc.type Lecture en_US
dc.type Video en_US
dc.contributor.corporatename Georgia Institute of Technology. Microelectronics Research Center
dc.contributor.corporatename Georgia Institute of Technology. Nanotechnology Research Center
dc.contributor.corporatename Georgia Institute of Technology. School of Mechanical Engineering

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