Thiophenol-Modified Fluorographene Derivatives for Nonlinear Optical Applications.
The synthesis and characterization of two thiophenol-modified fluorographene derivatives, namely methoxythiophenol-and dimethylaminothiophenol-modified fluorographenes, are reported, while their third-order nonlinear optical response were thoroughly investigated under both visible (532 nm) and infrared (1064 nm) with 35 ps and 4 ns laser pulses. The graphene derivatives were obtained by partial nucleophilic substitution/reduction of fluorographene by the corresponding organic thiophenols, and were fully characterized by techniques including infrared/Raman spectroscopy, X-ray photoelectron spectroscopy, atomic force spectroscopy, and high-resolution transmission microscopy. This type of modification resulted in graphenic structures where the attached thiol groups, sp2 domains, and the residual fluorine groups act as donors, π bridges, and acceptors, respectively. Both derivatives exhibited large nonlinear optical response compared to fluorographene, and have potential applications in optical limiting as an alternative to fullerenes.
['Stathis|Aristeidis|A|', 'Papadakis|Ioannis|I|http://orcid.org/0000-0001-6128-3057', 'Karampitsos|Nikolaos|N|', 'Couris|Stelios|S|', 'Potsi|Georgia|G|', 'Bourlinos|Athanasios B|AB|', 'Otyepka|Michal|M|', 'Zboril|Radek|R|']
fluorographene optical limiting nonlinear optical properties surface modification thiophenol derivatives