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Article

Tailoring the Nonlinear Optical Response of Some Graphene Derivatives by Ultraviolet (UV) Irradiation

1
Department of Physics, University of Patras, 26504 Patras, Greece
2
Institute of Chemical Engineering Sciences (ICE-HT), Foundation for Research and Technology-Hellas (FORTH), 26504 Patras, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Rodolphe Antoine
Nanomaterials 2022, 12(1), 152; https://doi.org/10.3390/nano12010152
Received: 9 December 2021 / Revised: 28 December 2021 / Accepted: 29 December 2021 / Published: 1 January 2022
In the present work the impact of in situ photoreduction, by means of ultraviolet (UV) irradiation, on the nonlinear optical response (NLO) of some graphene oxide (GO), fluorographene (GF), hydrogenated fluorographene (GFH) and graphene (G) dispersions is studied. In situ UV photoreduction allowed for the extended modification of the degree of functionalization (i.e., oxidization, fluorination and hydrogenation), leading to the effective tuning of the corresponding sp2/sp3 hybridization ratios. The nonlinear optical properties of the studied samples prior to and after UV irradiation were determined by means of the Z-scan technique using visible (532 nm), 4 ns laser excitation, and were found to change significantly. More specifically, while GO’s nonlinear optical response increases with irradiation time, GF and GFH present a monotonic decrease. The graphene dispersions’ nonlinear optical response remains unaffected after prolonged UV irradiation for more than an hour. The present findings demonstrate that UV photoreduction can be an effective and simple strategy for tuning the nonlinear optical response of these graphene derivatives in a controllable way, resulting in derivatives with custom-made responses, thus more suitable for different photonic and optoelectronic applications. View Full-Text
Keywords: UV irradiation; graphene; fluorographene; graphene oxide; hydrogenated fluorographene; nonlinear optical response; graphene functionalization UV irradiation; graphene; fluorographene; graphene oxide; hydrogenated fluorographene; nonlinear optical response; graphene functionalization
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MDPI and ACS Style

Stathis, A.; Bouza, Z.; Papadakis, I.; Couris, S. Tailoring the Nonlinear Optical Response of Some Graphene Derivatives by Ultraviolet (UV) Irradiation. Nanomaterials 2022, 12, 152. https://doi.org/10.3390/nano12010152

AMA Style

Stathis A, Bouza Z, Papadakis I, Couris S. Tailoring the Nonlinear Optical Response of Some Graphene Derivatives by Ultraviolet (UV) Irradiation. Nanomaterials. 2022; 12(1):152. https://doi.org/10.3390/nano12010152

Chicago/Turabian Style

Stathis, Aristeidis, Zoi Bouza, Ioannis Papadakis, and Stelios Couris. 2022. "Tailoring the Nonlinear Optical Response of Some Graphene Derivatives by Ultraviolet (UV) Irradiation" Nanomaterials 12, no. 1: 152. https://doi.org/10.3390/nano12010152

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