By a News Reporter-Staff News Editor at Science Letter -- Investigators publish new report on Chemical Vapor Deposition. According to news reporting originating from Taejon, South Korea, by NewsRx correspondents, research stated, "Perturbations of the two dimensional carbon lattice of graphene, such as grain boundaries, have significant influence on the charge transport and mechanical properties of this material. Scanning tunneling microscopy measurements presented here show that localized states near the Dirac point dominate the local density of states of grain boundaries in graphene grown by chemical vapor deposition."
Our news editors obtained a quote from the research from the Korea Research Institute of Standards and Science, "Such low energy states are not reproduced by theoretical models which treat the grain boundaries as periodic dislocation-cores composed of pentagonal-heptagonal carbon rings. Using ab initio calculations, we have extended this model to include disorder, by introducing vacancies into a grain boundary consisting of periodic dislocation-cores. Within the framework of this model we were able to reproduce the measured density of states features."
According to the news editors, the research concluded: "We present evidence that grain boundaries in graphene grown on copper incorporate a significant amount of disorder in the form of two-coordinated carbon atoms."
For more information on this research see: Electronic states of disordered grain boundaries in graphene prepared by chemical vapor deposition. Carbon, 2013;64():178-186. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)
The news editors report that additional information may be obtained by contacting P. Nemes-Incze, Korea Res Inst Stand & Sci, Div Ind Metrol, Center Nanocharacterizat, Taejon 305340, South Korea. Additional authors for this research include P. Vancso, Z. Osvath, G.I. Mark, X.Z. Jin, Y.S. Kim, C. Hwang, P. Lambin, C. Chapelier and L. PeterBiro (see also Chemical Vapor Deposition).
Keywords for this news article include: Asia, Taejon, South Korea, Nanotechnology, Emerging Technologies, Chemical Vapor Deposition
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