標題:The Effect of Thermal Reduction on the Photoluminescence and Electronic Structures of Graphene Oxides |
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學年 | 102 |
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學期 | 2 |
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出版(發表)日期 | 2014/03/11 |
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作品名稱 | The Effect of Thermal Reduction on the Photoluminescence and Electronic Structures of Graphene Oxides |
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作品名稱(其他語言) | |
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著者 | Chuang, C.-H.; Wang, Y.-F.; Shao, Y.-C.; Yeh, Y.-C.; Wang, D.-Y.; Chen, C.-W.; Chiou, J. W.; Ray, Sekhar C.; Pong, W. F.; Zhang, L.; Zhu, J. F.; Guo, J. H. |
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單位 | 淡江大學物理學系 |
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出版者 | London: Nature Publishing Group |
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著錄名稱、卷期、頁數 | Scientific Reports 4, 4525(7pages) |
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摘要 | Electronic structures of graphene oxide (GO) and hydro-thermally reduced graphene oxides (rGOs)processed at low temperatures (120–1806C) were studied using X-ray absorption near-edge structure XANES), X-ray emission spectroscopy (XES) and resonant inelastic X-ray scattering (RIXS). C K-edge XANES spectra of rGOs reveal that thermal reduction restores C 5 C sp2 bonds and removes some of the oxygen and hydroxyl groups of GO, which initiates the evolution of carbonaceous species. The combination of C K-edge XANES and Ka XES spectra shows that the overlapping p and p* orbitals in rGOs and GO are similar to that of highly ordered pyrolytic graphite (HOPG), which has no band-gap. C Ka RIXS spectra provide evidence that thermal reduction changes the density of states (DOSs) that is generated in the p-region and/or in the gap between the p and p* levels of the GO and rGOs. Two-dimensional C Ka RIXS mapping of the heavy reduction of rGOs further confirms that the residual oxygen and/or oxygen-containing functional groups modify the p and s features, which are dispersed by the photon excitation energy. The dispersion behavior near the K point is approximately linear and differs from the parabolic-like dispersion observed in HOPG. |
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關鍵字 | |
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語言 | 英文 |
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ISSN | 2045-2322 |
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期刊性質 | 國外 |
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收錄於 | SCI; |
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產學合作 | |
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通訊作者 | Pong, W. F.; Ray, Sekhar C. |
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審稿制度 | 是 |
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國別 | 英國 |
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公開徵稿 | |
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出版型式 | ,電子版 |
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相關連結 | |
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