Jump to ContentJump to Main Navigation
GrapheneA New Paradigm in Condensed Matter and Device Physics$
Users without a subscription are not able to see the full content.

E. L. Wolf

Print publication date: 2013

Print ISBN-13: 9780199645862

Published to Oxford Scholarship Online: January 2014

DOI: 10.1093/acprof:oso/9780199645862.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (www.oxfordscholarship.com). (c) Copyright Oxford University Press, 2019. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 13 November 2019

Sources and forms of graphene

Sources and forms of graphene

(p.98) 5 Sources and forms of graphene

E. L. Wolf

Oxford University Press

Micro-mechanical exfoliation of single graphene sheets from bulk mineral graphite opened the way to reliable measurements of graphene monolayer properties. The substrate supporting the monolayer affects the measured properties. The monolayer is also sensitive to local electric fields that induce local fluctuations in charge density and Fermi energy. Methods of producing multilayer graphenes come from chemical exfoliation in strong acids, separating and oxidizing the layers. The reduction back to carbon leaves many in-plane point defects, degrading the electrical properties. Catalytic CVD on copper is a leading method for making large area, high quality robust sheets. Four transferred monolayers with chemical doping and one meter extent, have resistance as low as 40 Ω/square with high optical transparency, suitable for touch-screen application. Costs are comparable with those of conventional methods, with a flexibility/durability advantage to the graphene product.

Keywords:   micro-mechanical exfoliation, monolayer, charge density, chemical exfoliation, point defect, chemical vapor deposition

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .