快速重离子辐照调制少层石墨烯的功函数。

P K Kasana, Jyoti Shakya, Tanuja Mohanty
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引用次数: 0

摘要

本文报道了用快速重离子(70 MeV Ni6+)诱导化学气相沉积石墨烯的结构和电子修饰。用拉曼光谱定量分析了辐照引起的振动特性变化。缺陷密度随通量的增大导致其特征拉曼D和G波段的强度比增大。缺陷密度的增加也会导致晶粒尺寸的减小。通过x射线衍射测量观察到晶体结构的变化。原子力显微镜和扫描开尔文探针显微镜分别测量了石墨烯薄膜的表面粗糙度和表面电位。功函数、表面粗糙度和缺陷浓度随通量的增大,表明它们之间可能存在线性相关关系。石墨烯片中缺陷的存在严重影响材料的表面电子和光学特性,这些特性可用于定制光电器件的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Work Function Modulation of Few-Layer Graphene by Swift Heavy Ion Irradiation.

Here, we report the structural and electronic modification induced in chemical vapor deposited graphene by using swift heavy ions (70 MeV Ni6+).Raman spectroscopy was used to quantify the irradiation-induced modification in vibrational properties. The increase in defect density with fluence causes an increase in the intensity ratio of its characteristic Raman D and G band. The increase in defect density also results in a decrease in crystallite size. The changes in the crystal structure are observed from X-rays diffraction measurement. Swift heavy ion irradiation induced defect, modified the surface roughness and surface potential of graphene thin film as measured from atomic force microscopy and scanning Kelvin probe microscopy respectively. The increase in the work function, surface roughness as well as defect concentration with fluence, indicate the possibility of linear correlation between them. Presence of defects in graphene sheets strongly affects surface electronic and optical properties of the material that can be used to tailor the optoelectronics device performance.

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来源期刊
Journal of nanoscience and nanotechnology
Journal of nanoscience and nanotechnology 工程技术-材料科学:综合
自引率
0.00%
发文量
0
审稿时长
3.6 months
期刊介绍: JNN is a multidisciplinary peer-reviewed journal covering fundamental and applied research in all disciplines of science, engineering and medicine. JNN publishes all aspects of nanoscale science and technology dealing with materials synthesis, processing, nanofabrication, nanoprobes, spectroscopy, properties, biological systems, nanostructures, theory and computation, nanoelectronics, nano-optics, nano-mechanics, nanodevices, nanobiotechnology, nanomedicine, nanotoxicology.
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