Journal ArticleDOI
Charge Transport in Thick Reduced Graphene Oxide Film
Ho Jong Kim,Ho Jong Kim,Daehee Kim,Daehee Kim,Suyong Jung,Sam Nyung Yi,Yong Ju Yun,Soo Kyung Chang,Dong Han Ha +8 more
TLDR
In this paper, the authors investigated temperature-dependent charge transport behavior in thin reduced graphene oxide (RGO) film and showed that charges transport through two parallel percolating conducting pathways.Abstract:
We have investigated temperature-dependent charge transport behavior in thick reduced graphene oxide (RGO) film. Our results show that charges transport through two parallel percolating conducting pathways. One contains large disordered regions as one of its constituents, so its conductance is determined dominantly by variable range hopping (VRH). The other is composed of small and medium disordered regions and crystalline sp2 domains, so its conductance is determined by a serial connection of quantum tunneling and thermal activation. The more oxygen functional groups are removed from GO film upon progressive reduction, the lower the potential barriers between the crystalline sp2 domains and disordered regions become. The contribution of thermal activation to total conductance does not appear evidently for highly reduced GO film having low potential barriers, but thermal activation causes the conductance of moderately reduced film to change continuously, even at low temperatures where the VRH is almost fr...read more
Citations
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Reduced graphene oxide film with record-high conductivity and mobility
Yilin Wang,Yanan Chen,Steven D. Lacey,Lisha Xu,Hua Xie,Tian Li,Valencia A. Danner,Liangbing Hu +7 more
TL;DR: In this paper, the scalable and high-yield chemical functionalization methods have been widely used to produce graphene, such as reduced graphene oxide (RGO), but the previously reported conductivity (
Journal ArticleDOI
Nanocarbons in Electrospun Polymeric Nanomats for Tissue Engineering: A Review
TL;DR: The differences among graphene, carbon nanotubes, nanodiamonds and fullerenes and their effect on the ultimate properties of the polymer-based nanofibrous scaffolds is elucidated and critically reviewed.
Journal ArticleDOI
Thermally Conductive Reduced Graphene Oxide Thin Films for Extreme Temperature Sensors
Journal ArticleDOI
Observation of negative differential resistance in mesoscopic graphene oxide devices
Servin Rathi,Inyeal Lee,Moon-Shik Kang,Moon-Shik Kang,Dongsuk Lim,Yoontae Lee,Serhan Yamacli,Han Ik Joh,Seongsu Kim,Sang-Woo Kim,Sun Jin Yun,Sukwon Choi,Gil-Ho Kim +12 more
TL;DR: With this precise control of carbon-oxygen ratio, negative differential resistance (NDR) is observed in the current-voltage characteristics of a two-terminal device in the ambient environment due to charge-activated electrochemical reactions at the GO surface.
Journal ArticleDOI
Non-destructive measurement of photoexcited carrier transport in graphene with ultrafast grating imaging technique
Ke Chen,Ke Chen,Maruthi N. Yogeesh,Yuan Huang,Shaoqing Zhang,Feng He,Xianghai Meng,Shaoyin Fang,Nathanial Sheehan,Tiger Hu Tao,Seth R. Bank,Jung-Fu Lin,Deji Akinwande,Peter Sutter,Tianshu Lai,Yaguo Wang +15 more
TL;DR: In this article, the authors used an ultrafast grating imaging technique to measure lifetime (τr), diffusion coefficient (D), diffusion length (L) and mobility (μ) of photoexcited carriers in mono-and multi-layer graphene.
References
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