Selective Area Band Engineering of Graphene using Cobalt-Mediated Oxidation / Bazylewski Paul F.,Van Luan Nguyen ,Bauer Robert P. C.,Hunt Adrian H.,McDermott Eamon J. G.,Leedahl Brett D.,Kukharenko Andrey I.,Cholakh Seif O.,Kurmaev Ernst Z.,Blaha Peter,Moewes Alexander,Lee Young Hee,Chang Gap Soo // SCIENTIFIC REPORTS. - 2015. - V. 5, l. .

ISSN/EISSN:

2045-2322 / нет данных

Type:

Article

Abstract:

This study reports a scalable and economical method to open a band gap in single layer graphene by deposition of cobalt metal on its surface using physical vapor deposition in high vacuum. At low cobalt thickness, clusters form at impurity sites on the graphene without etching or damaging the graphene. When exposed to oxygen at room temperature, oxygen functional groups form in proportion to the cobalt thickness that modify the graphene band structure. Cobalt/Graphene resulting from this treatment can support a band gap of 0.30 eV, while remaining largely undamaged to preserve its structural and electrical properties. A mechanism of cobalt-mediated band opening is proposed as a two-step process starting with charge transfer from metal to graphene, followed by formation of oxides where cobalt has been deposited. Contributions from the formation of both CoO and oxygen functional groups on graphene affect the electronic structure to open a band gap. This study demonstrates that cobalt-mediated oxidation is a viable method to introduce a band gap into graphene at room temperature that could be applicable in electronics applications.

Author keywords:

ELECTRONIC-STRUCTURE; BILAYER GRAPHENE; MONOLAYER GRAPHENE; RAMAN-SPECTROSCOPY; ORGANIC-MOLECULE; GAP; OXIDE; FILMS; NANORIBBONS

DOI:

10.1038/srep15380

Web of Science ID:

ISI:000363286200001

Соавторы в МНС:

Другие поля

Поле	Значение
Month	OCT 21
Publisher	NATURE PUBLISHING GROUP
Address	MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Language	English
Article-Number	15380
Keywords-Plus	ELECTRONIC-STRUCTURE; BILAYER GRAPHENE; MONOLAYER GRAPHENE; RAMAN-SPECTROSCOPY; ORGANIC-MOLECULE; GAP; OXIDE; FILMS; NANORIBBONS
Research-Areas	Science \& Technology - Other Topics
Web-of-Science-Categories	Multidisciplinary Sciences
Author-Email	gapsoo.chang@usask.ca
ResearcherID-Numbers	Blaha, Peter/F-2847-2010 Kukharenko, Andrey/M-8256-2016 Cholakh, Seif/M-8221-2016 Leedahl, Brett/B-8438-2015 Kurmaev, Ernst/J-4254-2013
ORCID-Numbers	Kukharenko, Andrey/0000-0003-3774-6909 Cholakh, Seif/0000-0002-9313-6614 Leedahl, Brett/0000-0001-8058-3557 Kurmaev, Ernst/0000-0003-4625-4930 McDermott, Eamon/0000-0002-5311-1500
Funding-Acknowledgement	Natural Sciences and Engineering Research Council of Canada (NSERC); Canada Foundation for Innovation (CFI); Canada Research Chairs Program; Institute for Basic Science in Korea {[}IBS-R011-D1]; FWF Doctoral School ``Solids4fun{''} in Austria; Ministry of Education and Science of Russia {[}14.587.21.0002, RFMEFI58714X0002]; Canadian Foundation for Innovation; Natural Sciences and Engineering Research Council of Canada; University of Saskatchewan; Government of Saskatchewan, Western Economic Diversification Canada; National Research Council Canada; Canadian Institutes of Health Research; WestGrid; Compute Canada Calcul Canada
Funding-Text	We gratefully acknowledge support from the Natural Sciences and Engineering Research Council of Canada (NSERC), Canada Foundation for Innovation (CFI), the Canada Research Chairs Program, the Institute for Basic Science in Korea (IBS-R011-D1), and the FWF Doctoral School ``Solids4fun{''} in Austria. XPS measurements were supported by the Ministry of Education and Science of Russia (agreement. 14.587.21.0002, unique identifier RFMEFI58714X0002). Research described in this paper was performed at the Canadian Light Source, which is supported by the Canadian Foundation for Innovation, Natural Sciences and Engineering Research Council of Canada, the University of Saskatchewan, the Government of Saskatchewan, Western Economic Diversification Canada, the National Research Council Canada, and the Canadian Institutes of Health Research. This research was enabled in part by support provided by WestGrid (www.westgrid.ca) and Compute Canada Calcul Canada (www.computecanada.ca).
Number-of-Cited-References	49
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	20
Journal-ISO	Sci Rep
Doc-Delivery-Number	CU1MO