Observation of negative differential resistance in mesoscopic graphene oxide devices
| Autor: | Inyeal Lee, Dongsuk Lim, Seongsu Kim, Sang-Woo Kim, Servin Rathi, Gil-Ho Kim, Yoontae Lee, Sukwon Choi, Moon-Shik Kang, Serhan Yamacli, Sun Jin Yun, Han Ik Joh |
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| Rok vydání: | 2017 |
| Předmět: |
Work (thermodynamics)
Fabrication Materials science Science Oxide 02 engineering and technology 010402 general chemistry 01 natural sciences Article law.invention chemistry.chemical_compound law Thermal Mesoscopic physics Multidisciplinary Graphene business.industry 021001 nanoscience & nanotechnology 0104 chemical sciences Controllability chemistry Optoelectronics Medicine 0210 nano-technology Joule heating business |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-9 (2018) |
| ISSN: | 2045-2322 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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