Graphene Foam Cantilever Produced via Simultaneous Foaming and Doping Effect of an Organic Coagulant
- Title
- Graphene Foam Cantilever Produced via Simultaneous Foaming and Doping Effect of an Organic Coagulant
- Author
- 한태희
- Keywords
- self-assembly; graphene foam; coagulants; foaming agents; chemical doping
- Issue Date
- 2020-03
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v. 12, no. 9, page. 10763-10771
- Abstract
- Inspired by the role of cellular structures, which give three-dimensional robustness to graphene structures, a new type of graphene cantilever with mechanical resilience is introduced. Here, NH4SCN is incorporated into graphene oxide (GO) gel using it as a coagulant for GO fiber self-assembly, a foaming agent, and a dopant. Subsequent thermal treatment of the GO fiber at 600 degrees C results in the evolution of gaseous species from NH4SCN, yielding internally porous graphene cantilevers (NS-GF cantilevers). The results reveal that NS-GF cantilevers are doped with N and S and thus exhibit higher electrical conductivity (150 S cm(-1)) than that of their nonporous counterparts (38.4 S cm(-1)). Unlike conventional fibers, the NS-GF cantilevers exhibit mechanical resilience by bending under applied mechanical force but reverting to the original position upon release. The tip of the NS-GF cantilevers is coated with magnetic Fe3O4 particles, and fast mechanical movement is achieved by applying the magnetic field. Since the NS-GF cantilevers are highly conductive and elastic, they are employed as bendable, magnetodriven electrical switches that could precisely read on/off signals for >10 000 cycles. Our approach suggests a robust fabrication strategy to prepare highly electroconductive and mechanically elastic foam structures by introducing unique organic foaming agents.
- URI
- https://pubs.acs.org/doi/10.1021/acsami.9b19498https://repository.hanyang.ac.kr/handle/20.500.11754/162802
- ISSN
- 1944-8244; 1944-8252
- DOI
- 10.1021/acsami.9b19498
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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