ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Direct evidences of hydrogen loosely trapped between graphene layers in nanostructuredgraphite prepared by mechanical milling in a hydrogen atmosphere are presented, based on acombinational study of FT-IR, electron diffraction (ED) and electron energy-loss spectroscopy(EELS). The FT-IR spectrum of nanostructured graphite exhibited a new broad absorption band atvery low frequencies around 660 cm-1, which almost disappeared by annealing up to 800 K. ED andplasmon peaks in EELS detected the unusual shrinkage and subsequent expansion of the fragmentedgraphene interlayer distance by hydrogen incorporation and desorption with annealing, wellcorrelated with the change in intensity of the 660 cm-1 IR band. All the present results support ourprevious studies [S. Muto et al., Jpn. J. Appl. Phys. 44, 2061 (2005); T. Kimura et al, J. Alloys andCompounds 413, 150 (2006).]
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1585.pdf
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