Functionalization of MoS2 with 1, 2-dithiolanes: toward donor-acceptor nanohybrids for energy conversion

Canton-Vitoria, R. ; Sayed-Ahmad-Baraza, Y. ; Pelaez-Fernandez, M. ; Arenal, R. (Universidad de Zaragoza) ; Bittencourt, C. ; Ewels, C.P. ; Tagmatarchis, N.

Resumen: 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.

Idioma: Inglés

DOI: 10.1038/s41699-017-0012-8

Año: 2017

Publicado en: npj 2D materials and applications. 1 (2017), 13 [9 pp]
ISSN: 2397-7132

Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2
Financiación: info:eu-repo/grantAgreement/EC/H2020/642742/EU/Graphene-based nanomaterials for touchscreen technologies: Comprehension, Commerce and Communication/Enabling Excellence
Financiación: info:eu-repo/grantAgreement/EC/H2020/696656/EU/Graphene-based disruptive technologies/GrapheneCore1
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2013-46159-C3-3-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2016-79776-P

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)