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Open AccessFeature PaperArticle

Influence of the Interactions at the Graphene–Substrate Boundary on Graphene Sensitivity to UV Irradiation

1
Institute of Materials Science and Engineering, Lodz University of Technology, 1/15 Stefanowskiego St., 90-924 Lodz, Poland
2
Advanced Graphene Products Sp. z o.o., 4 Nowy Kisielin–A. Wysockiego St., 66-002 Zielona Góra, Poland
3
Institute of Micro-and Optoelectronics, Warsaw University of Technology, Koszykowa 75, 00-662 Warszawa, Poland
*
Author to whom correspondence should be addressed.
Materials 2019, 12(23), 3949; https://doi.org/10.3390/ma12233949
Received: 5 November 2019 / Revised: 21 November 2019 / Accepted: 26 November 2019 / Published: 28 November 2019
(This article belongs to the Special Issue Advanced Carbon Coatings)
Graphene is a very promising material for electronics applications. In recent years, its sensitivity to ultraviolet (UV) irradiation has been studied extensively. However, there is no clear answer to the question, which factor has a key influence on the sensitivity of graphene to UV. In order to check the influence of the final substrate on the electrical response, graphene transferred on polymeric and non-polymeric substrate was investigated. To achieve this goal three polymeric and three non-polymeric substrates were tested. The results of the preliminary tests indicated the different character of the reaction on UV irradiation in each of group. To explain the reason of the difference, the complementary studies were done. The samples that were resistant to high temperature were annealed in a vacuum at 500 °C to get rid of water trapped between graphene and the substratum. The samples after annealing reacted less dynamically to UV irradiation. Moreover, the progress of changes in electrical response of the annealed samples had a similar character to the polymeric substrates, with the hydrophobic nature of the surface. These studies clearly prove that the sensitivity of graphene to UV irradiation is influenced by water trapped under the graphene. View Full-Text
Keywords: graphene sensors; UV irradiation; carrier concentration; wettability; Raman spectroscopy graphene sensors; UV irradiation; carrier concentration; wettability; Raman spectroscopy
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MDPI and ACS Style

Nowak, D.; Clapa, M.; Kula, P.; Sochacki, M.; Stonio, B.; Galazka, M.; Pelka, M.; Kuten, D.; Niedzielski, P. Influence of the Interactions at the Graphene–Substrate Boundary on Graphene Sensitivity to UV Irradiation. Materials 2019, 12, 3949.

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