2026-09-23T03:36:12Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/45564 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

thermal conductivity Pop, Eric Lian, Feifei 2013-08-22T16:47:58Z 2013-08-22T16:47:58Z 2015-08-22T10:00:58Z 2013-08 2013-08-22T16:47:58Z 2013-08 Carbon nanotube (CNT) films have a broad range of applications, from solar cells and transistors to bolometers and mechanical reinforcement additives for polymers. However, surprisingly little is still known about the thermal properties of such CNT films, and in particular about the intertube junctions. This study examines suspended films of conductive single-wall CNT (SWNT) films through electrical measurements and optical infrared (IR) thermometry in order to simultaneously characterize their electrical and thermal properties. Using an IR microscope, the real-time temperature profile of such CNT films under bias is mapped and used to extract thermal conductivity. A computation model was also developed to fit the one-dimensional heat diffusion equation to the temperature profile captured by the IR scope, including the effect of thermal contact resistance and heat loss to ambient. Transfer length method measurements were used to extract electrical contact resistance between the film and the electrodes. These methods were applied to investigate the properties of CNT films with several different morphologies, revealing that both electrical and thermal properties are strongly dependent on CNT volume density and junction within the films. Understanding fundamental transport within CNT networks allows us to try and decouple the properties and engineer novel materials for applications such as energy harvesting using thermoelectric power generation. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-07-09T15:51:23Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Lian_Feifei.pdf: 1980476 bytes, checksum: 49fb7b64a0004ac6a1c9a8861d4e6134 (MD5) Made available in DSpace on 2013-08-22T16:47:58Z (GMT). No. of bitstreams: 2 Feifei_Lian.pdf: 1980476 bytes, checksum: 49fb7b64a0004ac6a1c9a8861d4e6134 (MD5) license.txt: 4059 bytes, checksum: 9de9e314b25829078b772439dd7adff4 (MD5) Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Seth Robbins (srobbins@illinois.edu) on 2013-08-22T16:49:36Z Item is restricted until 2015-08-22T16:49:27Z Restriction data tranferred 2014-07-01T11:21:01-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2015-08-22 11:49:27 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 45546 on 2015-08-22T10:00:58Z. http://hdl.handle.net/2142/45564 en Copyright 2013 Feifei Lian Carbon nanotube thermal transport carbon nanotube films Thermal imaging and analysis of carbon nanotube composites text Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Thesis M.S. PHD:Electr & Computer Eng-UIUC 10KS1200PHD