BROWSE

Related Scientist

Researcher

나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
more info

Charge transport-driven selective oxidation of graphene

Cited 1 time in webofscience Cited 0 time in scopus
473 Viewed 63 Downloaded
Title
Charge transport-driven selective oxidation of graphene
Author(s)
Young Keun Lee; Choi H.; Changhwan Lee; Hyunsoo Lee; Kalyan C. Goddeti; Song Yi Moon; Won Hui Doh; Baik J.; Kim J.-S.; Choi J.S.; Choi C.-G.; Jeong Young Park
Publication Date
2016-06
Journal
NANOSCALE, v.8, no.22, pp.11494 - 11502
Publisher
ROYAL SOC CHEMISTRY
Abstract
Due to the tunability of the physical, electrical, and optical characteristics of graphene, precisely controlling graphene oxidation is of great importance for potential applications of graphene-based electronics. Here, we demonstrate a facile and precise way for graphene oxidation controlled by photoexcited charge transfer depending on the substrate and bias voltage. It is observed that graphene on TiO2 is easily oxidized under UV-ozone treatment, while graphene on SiO2 remains unchanged. The mechanism for the selective oxidation of graphene on TiO2 is associated with charge transfer from the TiO2 to the graphene. Raman spectra were used to investigate the graphene following applied bias voltages on the graphene/TiO2 diode under UV-ozone exposure. We found that under a reverse bias of 0.6 V on the graphene/TiO2 diode, graphene oxidation was accelerated under UV-ozone exposure, thus confirming the role of charge transfer between the graphene and the TiO2 that results in the selective oxidation of the graphene. The selective oxidation of graphene can be utilized for the precise, nanoscale patterning of the graphene oxide and locally patterned chemical doping, finally leading to the feasibility and expansion of a variety of graphene-based applications. © 2016 The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/2697
ISSN
2040-3364
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
Charge transport-driven selective oxidation of graphene.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse