Observation of negative differential resistance in mesoscopic graphene oxide devices

[ X ]

Tarih

2018

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Nature Portfolio

Erişim Hakkı

info:eu-repo/semantics/openAccess

Özet

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.

Açıklama

Anahtar Kelimeler

Heterostructures, Diodes, Dielectrophoresis, Nanostructures, Reduction, Efficient

Kaynak

Scientific Reports

WoS Q Değeri

Q1

Scopus Q Değeri

Q1

Cilt

8

Sayı

Künye