Journal
NPJ 2D MATERIALS AND APPLICATIONS
Volume 1, Issue -, Pages -Publisher
NATURE RESEARCH
DOI: 10.1038/s41699-017-0012-8
Keywords
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Funding
- European Union [642742, 312483-ESTEEM2]
- project Construyendo Europa desde Aragon [E/26]
- Spanish Ministry of Economy and Competitiveness (MINECO) [FIS2013-46159-C3-3-P, MAT2016-79776-P]
- European Union H2020 program Graphene Flagship [696656]
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The covalent functionalization of exfoliated semiconducting MoS2 by 1,2-dithiolanes bearing an ethylene glycol alkyl chain terminated to a butoxycarbonyl-protected amine and a photoactive pyrene moiety is accomplished. The MoS2-based nanohybrids were fully characterized by complementary spectroscopic, thermal, and microscopy techniques. Markedly, density functional theoretical studies combined with X-ray photoelectron spectroscopy analysis demonstrate preferential edge functionalization, primarily via sulfur addition along partially sulfur saturated zig-zag MoS2 molybdenum-edges, preserving intact the 2D basal structure of functionalized MoS2-based nanohybrids as confirmed by high-resolution transmission electron microscopy and electron energy loss spectroscopy. Furthermore, in the MoS2-pyrene hybrid, appreciable electronic interactions at the excited state between the photoactive pyrene and the semiconducting MoS2 were revealed as inferred by steady-state and time-resolved photoluminescence spectroscopy, implying its high potentiality to function in energy conversion schemes.
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