Document Detail


Synthesis, Characterization, Electronic and Gas-Sensing Properties towards H(2) and CO of Transparent, Large-Area, Low-Layer Graphene.
MedLine Citation:
PMID:  23032996     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Low-layered, transparent graphene is accessible by a chemical vapor deposition (CVD) technique on a Ni-catalyst layer, which is deposited on a <100> silicon substrate. The number of graphene layers on the substrate is controlled by the grain boundaries in the Ni-catalyst layer and can be studied by micro Raman analysis. Electrical studies showed a sheet resistance (R(sheet) ) of approximately 1435 Ω per □, a contact resistance (R(c) ) of about 127 Ω, and a specific contact resistance (R(sc) ) of approximately 2.8×10(-4)  Ω cm(2) for the CVD graphene samples. Transistor output characteristics for the graphene sample demonstrated linear current/voltage behavior. A current versus voltage (I(ds) -V(ds) ) plot clearly indicates a p-conducting characteristic of the synthesized graphene. Gas-sensor measurements revealed a high sensor activity of the low-layer graphene material towards H(2) and CO. At 300 °C, a sensor response of approximately 29 towards low H(2) concentrations (1 vol %) was observed, which is by a factor of four higher than recently reported.
Authors:
Emine Kayhan; Ravi Mohan Prasad; Alexander Gurlo; Oktay Yilmazoglu; Jörg Engstler; Emanuel Ionescu; Songhak Yoon; Anke Weidenkaff; Jörg J Schneider
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-2
Journal Detail:
Title:  Chemistry (Weinheim an der Bergstrasse, Germany)     Volume:  -     ISSN:  1521-3765     ISO Abbreviation:  Chemistry     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9513783     Medline TA:  Chemistry     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Affiliation:
Technische Universität Darmstadt, Eduard-Zintl-Institut, Fachbereich Chemie, Fachgebiet Anorganische Chemie, Petersenstrasse 18, 64287 Darmstadt (Germany), Fax: (+49) 6151-163470.
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