상세정보
학술지
Observation of Negative Differential Resistance in Mesoscopic Graphene Oxide Devices
- 저자
- Servin Rathi, 이인렬, 강문식, 임동석, 이윤태, Serhan Yamacli, 조한익, 김성수, 김상우, 윤선진, 최석원, 김길호
- 발행일
- 201805
- 출처
- Scientific Reports, v.8, pp.1-9
- ISSN
- 2045-2322
- 출판사
- Nature Research
- 초록
- The fractions of various functional groups in graphene oxide (GO) are directly related to its electrical and chemical properties and can be controlled by various reduction methods like thermal, chemical and optical. However, a method with sufficient controllability to regulate the reduction process has been missing. In this work, a hybrid method of thermal and joule heating processes is demonstrated where a progressive control of the ratio of various functional groups can be achieved in a localized area. 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. This experimental observation correlates with the optical and chemical characterizations. This NDR behavior offers new opportunities for the fabrication and application of such novel electronic devices in a wide range of devices applications including switches and oscillators.
- KSP 제안 키워드
- Functional group, Graphene oxide(GOS), Joule Heating, Negative differential resistance(NDR), Oxygen ratio, Precise control, Reduction method, Two-terminal device, Wide range, ambient environment, chemical properties