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oai:www.ideals.illinois.edu:2142/97365 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Lyding, Joseph W. Munukutla, Siddhanth 2017-08-10T19:15:07Z 2017-08-10T19:15:07Z 2017-04-19 2017-05 In this thesis, we explore the electronics applications of the nanoscale allotropes of carbon. We work with carbon nanotubes and graphene nanoribbons. The first part involves using carbon nanotubes (CNTs) to build composite structures such as fibers. In the past, our group developed the “nanosoldering” technique to solder carbon nanotube junctions which significantly improved the electrical properties of CNT transistors. For the purpose of our work, we apply the nanosoldering technique to the CNT junctions in the fibers to enhance their properties. We study the electrical and thermal properties of the fibers before and after nanosoldering. We measure the electrical conductivity using a four-terminal sensing circuit, and an IR microscope is used to map the real-time temperature profile of the fibers to extract thermal conductivity. In the second part, we also fabricate and characterize transistors from thin films of atomically precise graphene nanoribbons (GNRs). Device studies of solution synthesized GNRs have been limited because of poor processing. In this work, a novel interfacial self-assembly approach is used to produce uniform thin films of GNRs. Transistors are then fabricated using the GNR thin films as the channel material and the resulting devices are characterized. Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-08-10 without embargo terms The student, Siddhanth Munukutla, accepted the attached license on 2017-04-16 at 10:48. The student, Siddhanth Munukutla, submitted this Thesis for approval on 2017-04-16 at 10:55. This Thesis was approved for publication on 2017-04-19 at 11:25. DSpace SAF Submission Ingestion Package generated from Vireo submission #10784 on 2017-08-10 at 13:40:44 Made available in DSpace on 2017-08-10T19:15:07Z (GMT). No. of bitstreams: 2 MUNUKUTLA-THESIS-2017.pdf: 3253037 bytes, checksum: 734491f1aa7050c0cd0b0b65820f7f78 (MD5) LICENSE.txt: 4216 bytes, checksum: 28fae45d5dc587f1e39e6afa46c6e592 (MD5) Previous issue date: 2017-04-19 application/pdf http://hdl.handle.net/2142/97365 en Copyright 2017 Siddhanth Munukutla Carbon nanotubes Graphene nanoribbons Composite fibers Thin film transistors Nanosoldering carbon nanotube fibers and graphene nanoribbon thin film transistors text text Electrical & Computer Eng Electrical & Computer Engr University of Illinois at Urbana-Champaign Thesis M.S.