中国科学院重庆绿色智能技术研究院机构知识库

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	Conductivity mapping of graphene on polymeric films by terahertz time-domain spectroscopy
	Whelan, Patrick R.1; Huang, Deping2; Mackenzie, David1; Messina, Sara A.1,3; Li, Zhancheng2; Li, Xin2; Li, Yunqing2; Booth, Timothy J.1; Jepsen, Peter U.1,4; Shi, Haofei2
	2018
摘要	Fast inline characterization of the electrical properties of graphene on polymeric substrates is an essential requirement for quality control in industrial graphene production. Here we show that it is possible to measure the sheet conductivity of graphene on polymer films by terahertz time-domain spectroscopy (THz-TDS) when all internally reflected echoes in the substrate are taken into consideration. The conductivity measured by THz-TDS is comparable to values obtained from four point probe measurements. THz-TDS maps of 25x30 cm2area graphene films were recorded and the DC conductivity and carrier scattering time were extracted from the measurements. Additionally, the THz-TDS conductivity maps highlight tears and holes in the graphene film, which are not easily visible by optical inspection. © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
DOI	10.1364/OE.26.017748
发表期刊	Optics Express
ISSN	1094-4087
卷号	26期号:14页码:17748-17754
收录类别	SCI
语种	英语
EISSN	10944087