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. 2019 Apr 28;12(9):1376. doi: 10.3390/ma12091376

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Optical images of graphene grown on quartz glass and pure quartz glass. (b) Ultraviolet-visible spectra of the CVD graphene films on quartz glass.