Universität zu Köln

Usachov, Dmitry, Fedorov, Alexander ORCID: 0000-0002-9228-7082, Vilkov, Oleg, Senkovskiy, Boris, Adamchuk, Vera K., Yashina, Lada V., Volykhov, Andrey A., Farjam, Mani, Verbitskiy, Nikolay I., Grueneis, Alexander, Laubschat, Clemens and Vyalikh, Denis V. (2014). The Chemistry of Imperfections in N-Graphene. Nano Lett., 14 (9). S. 4982 - 4989. WASHINGTON: AMER CHEMICAL SOC. ISSN 1530-6992

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Abstract

Many propositions have been already put forth for the practical use of N-graphene in various devices, such as batteries, sensors, ultracapacitors, and next generation electronics. However, the chemistry of nitrogen imperfections in this material still remains an enigma. Here we demonstrate a method to handle N-impurities in graphene, which allows efficient conversion of pyridinic N to graphitic N and therefore precise tuning of the charge carrier concentration. By applying photoemission spectroscopy and density functional calculations, we show that the electron doping effect of graphitic N is strongly suppressed by pyridinic N. As the latter is converted into the graphitic configuration, the efficiency of doping rises up to half of electron charge per N atom.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Usachov, Dmitry UNSPECIFIED UNSPECIFIED UNSPECIFIED Fedorov, Alexander UNSPECIFIED orcid.org/0000-0002-9228-7082 UNSPECIFIED Vilkov, Oleg UNSPECIFIED UNSPECIFIED UNSPECIFIED Senkovskiy, Boris UNSPECIFIED UNSPECIFIED UNSPECIFIED Adamchuk, Vera K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Yashina, Lada V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Volykhov, Andrey A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Farjam, Mani UNSPECIFIED UNSPECIFIED UNSPECIFIED Verbitskiy, Nikolay I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grueneis, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Laubschat, Clemens UNSPECIFIED UNSPECIFIED UNSPECIFIED Vyalikh, Denis V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-430056
DOI:	10.1021/nl501389h
Journal or Publication Title:	Nano Lett.
Volume:	14
Number:	9
Page Range:	S. 4982 - 4989
Date:	2014
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1530-6992
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ELECTRONIC-STRUCTURE; CATALYTIC-ACTIVITY; RECENT PROGRESS; ADSORPTION; MONOLAYER Multiple languages Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/43005