Changing photoluminescence spectra of graphene oxide by centrifugation treatments
Changing photoluminescence spectra of graphene oxide by centrifugation treatments
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DOI：
10.1002/pssc.201300232
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发表时间：
2013-11
期刊：
影响因子：
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通讯作者：
D. Kozawa;Y. Miyauchi;S. Mouri;K. Matsuda
中科院分区：
文献类型：
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作者：
D. Kozawa;Y. Miyauchi;S. Mouri;K. Matsuda
我们进行了连续波光致发光（PL）测量，以研究离心处理前后氧化石墨烯（GO）的光学特性。原始的 GO 在近红外 (NIR) 区域 (∼1.7 eV) 附近显示出 PL 峰。相比之下，离心的 GO 在蓝色（~2.8 eV）和紫外（~4.1 eV）区域表现出 PL 峰。原始GO和离心GO的发射特征之间的差异源于主要结构从sp2团簇到准分子结构的变化。我们的研究结果表明，通过离心处理，GO 的 PL 在近红外到紫外区域范围内具有可调性。 （© 2013 WILEY-VCH Verlag GmbH & Co. KGaA，魏因海姆）
We conducted continuous-wave photoluminescence (PL) measurements to study optical properties of graphene oxide (GO) before and after a centrifugation treatment. The pristine GOs show a PL peak around near-infrared (NIR) region (∼1.7 eV). In contrast, the centrifuged GOs exhibit PL peaks at blue (∼2.8 eV) and UV (∼4.1 eV) region. The difference among the emission features in the pristine and centrifuged GOs originates from the change of major structure from the sp2 clusters to the quasi-molecular structure. Our findings indicate tunability of PL from GOs in the range from NIR to UV region by the centrifugation treatment. (© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)