Microwave transmission in graphene oxide

• Published in: Nanotechnology Vol. 24; no. 1; p. 015201
• Main Authors: Yoon, Hyong Seo, Kim, Whan Kyun, Jung, Young Mo, Cho, Joon Hyong, Kim, D H, Song, In Sang, Choi, Jung Han, Baik, Seunghyun, Jun, Seong Chan
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 11.01.2013; Institute of Physics
• Subjects: Contact; Contact resistance; Cross-disciplinary physics: materials science; rheology; Electrodes; Exact sciences and technology; Frequency ranges; Fullerenes and related materials; diamonds, graphite; Graphene; Impedance; Materials science; Oxides; Physics; Sheet metal; Specific materials; Frequency dependence; Manufacturing processes; Graphene; Electromagnetic wave transmission; Contact resistance; Dielectrophoresis; Raman spectroscopy; X-ray photoelectron spectra
• ISSN: 0957-4484; 1361-6528
• DOI: 10.1088/0957-4484/24/1/015201

We investigated the radio-frequency transmission properties of reduced graphene oxide (GO) sheets including contact effects with the metal electrodes. GO sheets were prepared by dielectrophoresis and their structural characteristics were analyzed by x-ray photoelectron spectroscopy and Raman spectroscopy. The contact resistance was much higher than the intrinsic resistance over the entire frequency range, thus the contact resistance was considered as a dominant component of impedance in the radio-frequency regime. In the radio-frequency regime, GO sheets showed a drastic decrease in impedance based on a consistent decrease in the intrinsic and contact resistance. These results support the potential of GO as a radio-frequency interconnector with a solution-based fabrication method.