Self-propagated combustion synthesis of few-layered graphene: an optical properties perspective.
Self-propagated combustion synthesis of few-layered graphene: an optical properties perspective.
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DOI：
10.1039/c7nr09156g
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发表时间：
2018-04
期刊：
影响因子：
6.7
通讯作者：
Manonmani Mohandoss;Soujit Sen Gupta;Ramesh A Kumar;Rabiul Islam;Anirban Som;Azhardin Ganayee Mohd;T. Pradeep;S. M. Maliyekkal
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文献类型：
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作者：
Manonmani Mohandoss;Soujit Sen Gupta;Ramesh A Kumar;Rabiul Islam;Anirban Som;Azhardin Ganayee Mohd;T. Pradeep;S. M. Maliyekkal
本文描述了一种劳动效率和成本效益的策略，以制备几层的还原氧化石墨烯类（RGOL）片从石墨。自蔓延燃烧路线使得RGOL片材的批量生产成为可能。显微镜和光谱分析证实了平均厚度为1.3nm的少层石墨烯片的形成和一些具有8.74的C/O比的氧官能团的存在。提出了一种可能的RGOL片形成的机制途径。利用椭圆偏振光谱仪（SE）对RGOL样品的光学性质进行了详细的研究。SE的实验能力在有关的光学性质与样品中存在的氧官能团的数量进行了探索。利用双层光学模型沿着与Drude-Lorentz振荡色散关系对数据进行了分析。的折射率（n = 2.24），消光系数（k = 2.03），和介电函数得到使用逐点分析，并检查Kramers-Kronig（KK）的一致性。
This paper describes a labour efficient and cost-effective strategy to prepare few-layered of reduced graphene oxide like (RGOL) sheets from graphite. The self-propagated combustion route enables the bulk production of RGOL sheets. Microscopic and spectroscopic analyses confirmed the formation of few-layer graphene sheets of an average thickness of ∼3 nm and the presence of some oxygen functional groups with a C/O ratio of 8.74. A possible mechanistic pathway for the formation of RGOL sheets is proposed. The optical properties of the RGOL sample were studied in detail by means of Spectroscopic Ellipsometry (SE). The experimental abilities of SE in relating the optical properties with the number of oxygen functionalities present in the samples are explored. The data were analysed by a double-layered optical model along with the Drude-Lorentz oscillatory dispersion relation. The refractive index (n = 2.24), extinction coefficient (k = 2.03), and dielectric functions are obtained using point-by-point analysis and are also checked for Kramers-Kronig (KK) consistency.