BROWSE

Related Scientist

Researcher

나노 구조 물리 연구단
나노구조물리 연구단
more info

Time Evolution Studies on Strain and Doping of Graphene Grown on a Copper Substrate Using Raman Spectroscopy

Cited 0 time in webofscience Cited 0 time in scopus
36 Viewed 13 Downloaded
Title
Time Evolution Studies on Strain and Doping of Graphene Grown on a Copper Substrate Using Raman Spectroscopy
Author(s)
Ukjae Lee; Yoojoong Han; Sanghyub Lee; Jun Suk Kim; Young Hee Lee; Un Jeong Kim; Hyungbin Son
Publication Date
2020-01
Journal
ACS NANO, v.14, no.1, pp.919 - 926
Publisher
AMER CHEMICAL SOC
Abstract
© 2019 American Chemical Society.The enhanced growth of Cu oxides underneath graphene grown on a Cu substrate has been of great interest to many groups. In this work, the strain and doping status of graphene, based on the gradual growth of Cu oxides from underneath, were systematically studied using time evolution Raman spectroscopy. The compressive strain to graphene, due to the thermal expansion coefficient difference between graphene and the Cu substrate, was almost released by the nonuniform Cu2O growth; however, slight tensile strain was exerted. This induced p-doping in the graphene with a carrier density up to 1.7 × 1013 cm-2 when it was exposed to air for up to 30 days. With longer exposure to ambient conditions (>1 year), we observed that graphene/Cu2O hybrid structures significantly slow down the oxidation compared to that using a bare Cu substrate. The thickness of the CuO layer on the bare Cu substrate was increased to approximately 270 nm. These findings were confirmed through white light interference measurements and scanning electron microscopy
URI
https://pr.ibs.re.kr/handle/8788114/7058
ISSN
1936-0851
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
Time Evolution_ACS Nano_Young Hee Lee.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