期刊
NANOSCALE
卷 5, 期 12, 页码 5620-5627出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr00265a
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资金
- Priority Research Centers Program [2009-0093823]
- Pioneer Research Center Program [2010-0019313]
- National Research Foundation of Korea
- Korean Government through Ministry of Science, ICT AMP
- Future Planning [20120005186, 20120000651]
- National Research Foundation of Korea [2009-0093823, 2005-0049412, 2011-0014219, 2010-0019457] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The role of palladium (Pd) in the reduction of graphene oxide (GO) thin films was investigated using a Pd assisted grafting technique. The structural and optical characteristics of these thin films were obtained from various spectroscopic analyses, which confirmed increased C=C-C aromatic ring vibration and oxidation of Pd with Ar annealing. In Pd free GO, annealing of films resulted in restoration of sp(2) clusters; however, Pd grafting with non-annealed film enhanced the possibility of restoration and further annealing dramatically increased the restoration rate with enhanced blue photoluminescence (PL) emission. The blue PL emission originates from sp(2) cluster sites and the yellow-green PL from defect trapped states. As reduction of GO increased, yellow-green emission decreased and blue PL became the prominent emission. These experimental findings open up a new feasible pathway for controlling the luminescence emission from graphene oxide that furthers the technological advancement of graphene based optoelectronic devices.
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