Noncovalent Functionalization and Charge Transfer in Antimonene

Gonzalo Abellan, Pablo Ares, Stefan Wild, Edurne Nuin, Christian Neiss, David Rodriguez-San Miguel, Pilar Segovia, Carlos Gibaja, Enrique G. Michel, Andreas Gorling, Frank Hauke, Julio Gomez-Herrero, Andreas Hirsch, Felix Zamora

    Research output: Contribution to journalLetterpeer-review

    Abstract

    Antimonene, a novel group 15 two-dimensional material, is functionalized with a tailormade perylene bisimide through strong van der Waals interactions. The functionalization process leads to a significant quenching of the perylene fluorescence, and surpasses that observed for either graphene or black phosphorus, thus allowing straightforward characterization of the flakes by scanning Raman microscopy. Furthermore, scanning photoelectron microscopy studies and theoretical calculations reveal a remarkable charge-transfer behavior, being twice that of black phosphorus. Moreover, the excellent stability under environmental conditions of pristine antimonene has been tackled, thus pointing towards the spontaneous formation of a sub-nanometric oxide passivation layer. DFT calculations revealed that the noncovalent functionalization of antimonene results in a charge-transfer band gap of 1.1 eV.
    Original languageEnglish
    Pages (from-to)14389-14394
    JournalANGEWANDTE CHEMIE-INTERNATIONAL EDITION
    Volume56
    Issue number46
    DOIs
    Publication statusPublished - 13 Nov 2017

    Keywords

    • antimonene
    • electron microscopy
    • charge transfer
    • phosphorus
    • surface chemistry

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