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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Optical properties of graphite oxide and reduced graphite oxide
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Optical properties of graphite oxide and reduced graphite oxide

机译：氧化石墨和还原氧化石墨的光学性质

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摘要

We studied the optical properties of a graphite oxide and a reduced graphite oxide by using the optical spectroscopic technique. The graphite oxide does not show a finite dc conductivity and has several characteristic absorption modes in the mid-infrared region, caused by an epoxide functional group and hydroxyl and carboxyl moieties in the mid-infrared range. The reduced graphite oxide shows a Drude-like response in the far-infrared region and the estimated dc conductivity and electric mobility are around 200?~(?1)cm~(?1) and ～100 cm~2V~(?1)s~(?1), respectively. We found that the optical conductivity cannot be fitted with a simple Drude model, which indicates that the charge carriers are correlated. We applied an extended Drude model and obtained the optical scattering rate and the optical effective mass. We found that the optical effective mass can carry information of both the enhanced mass by correlation and the electronic band structure.
机译：我们通过使用光谱技术研究了氧化石墨和还原的氧化石墨的光学性质。氧化石墨没有显示出有限的直流电导率，并且在中红外区域具有几种特征吸收模式，这是由中红外范围内的环氧官能团以及羟基和羧基部分引起的。还原后的氧化石墨在远红外区域表现出类似Drude的响应，并且估计的直流电导率和电迁移率约为200？〜（？1）cm〜（？1）和〜100 cm〜2V〜（？1） s〜（？1）。我们发现光导率无法用简单的Drude模型拟合，这表明电荷载流子是相关的。我们应用了扩展的Drude模型，并获得了光散射率和光学有效质量。我们发现光学有效质量可以通过相关性和电子能带结构携带增强质量的信息。

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