Correlated Optical and Magnetic Properties in Photoreduced Graphene Oxide
Correlated Optical and Magnetic Properties in Photoreduced Graphene Oxide
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DOI：
10.1021/jp509399x
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发表时间：
2014-11
影响因子：
3.7
通讯作者：
T. Taniguchi;H. Yokoi;M. Nagamine;Hikaru Tateishi;Asami Funatsu;Kazuto Hatakeyama;C. Ogata;M. Ichida
中科院分区：
文献类型：
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作者：
T. Taniguchi;H. Yokoi;M. Nagamine;Hikaru Tateishi;Asami Funatsu;Kazuto Hatakeyama;C. Ogata;M. Ichida
由于氧化石墨烯（GO）相关材料在各个技术领域的应用前景，GO的光学和磁学性质得到了广泛的研究。到目前为止，已经独立地讨论了GO的光学和磁性。然而，还原GO中的局域电子态可以同时增加GO纳米片中sp2纳米畴中的光学跃迁和自旋矩。在本研究中，在实验和理论研究的基础上，氧化石墨烯（GO）在水溶液中的光还原的结构，光学和磁性的相关性。实验观察表明，光还原导致可见光吸收增强，光致发光猝灭，并出现磁性。详细的光谱和微观表征表明存在光还原产生的基面C-H键和碳空位。从头计算表明，存在这些缺陷的sp2纳米畴的结果…
Optical and magnetic properties of graphene oxide (GO) have been intensively investigated because of the promising applications of GO-related materials in various technical fields. So far, the optical and magnetic properties of GO have been discussed independently. However, localized electronic states in reduced GO may simultaneously add optical transitions and spin moments in sp2 nanodomains in GO nanosheets. In the present study, the structural, optical, and magnetic properties of graphene oxide (GO) photoreduced in an aqueous solution are correlated on the basis of experimental and theoretical investigations. Experimental observations show that photoreduction leads to enhancement of visible absorption, quenching of photoluminescence, and emergence of magnetism. Detailed spectroscopic and microscopic characterizations indicate the presence of photoreduction-produced basal plane C—H bonding and carbon vacancies. Ab initio calculations suggest that the presence of these defects in sp2 nanodomains results ...