PMID- 20815368
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20110118
LR  - 20100929
IS  - 1936-086X (Electronic)
IS  - 1936-0851 (Linking)
VI  - 4
IP  - 9
DP  - 2010 Sep 28
TI  - Efficient preparation of large-area graphene oxide sheets for transparent 
      conductive films.
PG  - 5245-52
LID - 10.1021/nn1015506 [doi]
AB  - Large-area sheets are highly desirable for fundamental research and technological 
      applications of graphene. Here we introduce a modified chemical exfoliation 
      technique to prepare large-area graphene oxide (GO) sheets. The maximum area of 
      the GO sheets obtained can reach  approximately 40000 mum(2). We found that the GO area is 
      strongly correlated with the C-O content of the graphite oxide, which enables the 
      area of the synthesized GO sheets to be controlled. By simply changing oxidation 
      conditions, GO sheets with an average area of ca. 100-300, ca. 1000-3000, and 
       approximately 7000 mum(2) were selectively synthesized. For transparent conductive film 
      applications, thin GO films were fabricated by self-assembly on a liquid/air 
      interface and reduced by HI acid. We found that the sheet resistance of the 
      reduced GO (rGO) films decreases with increasing sheet area at the same 
      transmittance because of the decrease in the number of intersheet tunneling 
      barriers. The rGO film made from GO sheets with an average area of  approximately 7000 mum(2) 
      shows a sheet resistance of 840 Omega/sq at 78% transmittance, which is much lower 
      than that (19.1 kOmega/sq at 79% transmittance) of a rGO film made from small-area GO 
      sheets of ca. 100-300 mum(2), and comparable to that of graphene films grown on Ni 
      by chemical vapor deposition.
FAU - Zhao, Jinping
AU  - Zhao J
AD  - Shenyang National Laboratory for Materials Science, Institute of Metal Research, 
      Chinese Academy of Sciences, Shenyang 110016, P.R. China.
FAU - Pei, Songfeng
AU  - Pei S
FAU - Ren, Wencai
AU  - Ren W
FAU - Gao, Libo
AU  - Gao L
FAU - Cheng, Hui-Ming
AU  - Cheng HM
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - ACS Nano
JT  - ACS nano
JID - 101313589
EDAT- 2010/09/08 06:00
MHDA- 2010/09/08 06:01
CRDT- 2010/09/07 06:00
PHST- 2010/09/07 06:00 [entrez]
PHST- 2010/09/08 06:00 [pubmed]
PHST- 2010/09/08 06:01 [medline]
AID - 10.1021/nn1015506 [doi]
PST - ppublish
SO  - ACS Nano. 2010 Sep 28;4(9):5245-52. doi: 10.1021/nn1015506.