Nucleation and growth dynamics of graphene on oxygen exposed copper substrate

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105501

Title:	Nucleation and growth dynamics of graphene on oxygen exposed copper substrate
Authors:	溫偉源;Chuang, Min-Chiang;Woon, Wei-Yen
Contributors:	理學院物理學系
Keywords:	cold;cupric oxide;fractal dimensions;graphene;image analysis;oxygen;vapors
Date:	2016-07-01
Issue Date:	2026-04-23 12:32:02 (UTC+8)
Publisher:	Elsevier Ltd.;Elsevier Ltd
Abstract:	摘要： We study the nucleation and growth dynamics of graphene grown on Cu and CuO substrates in a cold wall rapid thermal chemical vapor deposition (RTCVD) system under low pressure. Through image processing and analysis, we quantitatively characterize the RTCVD process. Larger and more compact graphene grains are found on CuO substrate. Furthermore, contrary to the hot wall CVD which exhibit instantaneous nucleation characteristics, our system exhibit substrate dependent non-constant nucleation rates. The coverage evolution can be well described by Johnson-Mehl-Avrami-Kolmogorov (JMAK) model, with the exponent varies from 3.9 to 2.1 for Cu and CuO substrate, respectively. Putting the measured fractal dimensions into the JMAK model, we find exponents related to non-equilibrium nucleation rates that qualitatively agree with observations. Our analysis suggests that new nucleation centers are more efficiently suppressed on CuO substrate during the RTCVD process. 出版者： Elsevier Ltd 出版日期： 2016-07-01 出處： Carbon (New York), 2016-07, Vol.103, p.384-390 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2016 Elsevier Ltd 識別號： ISSN: 0008-6223 識別號： EISSN: 1873-3891 識別號： DOI: 10.1016/j.carbon.2016.03.049
Appears in Collections:	[Department of Physics] journal & Dissertation

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