Issue 7, 2019

Monolayer black phosphorus by sequential wet-chemical surface oxidation

Abstract

We report a straightforward chemical methodology for controlling the thickness of black phosphorus flakes down to the monolayer limit by layer-by-layer oxidation and thinning, using water as solubilizing agent. Moreover, the oxidation process can be stopped at will by two different passivation procedures, namely the non-covalent functionalization with perylene diimide chromophores, which prevents the photooxidation, or by using a protective ionic liquid layer. The obtained flakes preserve their electronic properties as demonstrated by fabricating a BP field-effect transistor (FET). This work paves the way for the preparation of BP devices with controlled thickness.

Graphical abstract: Monolayer black phosphorus by sequential wet-chemical surface oxidation

Supplementary files

Article information

Article type
Paper
Submitted
01 11 2018
Accepted
17 1 2019
First published
25 1 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 3570-3576

Monolayer black phosphorus by sequential wet-chemical surface oxidation

S. Wild, V. Lloret, V. Vega-Mayoral, D. Vella, E. Nuin, M. Siebert, M. Koleśnik-Gray, M. Löffler, K. J. J. Mayrhofer, C. Gadermaier, V. Krstić, F. Hauke, G. Abellán and A. Hirsch, RSC Adv., 2019, 9, 3570 DOI: 10.1039/C8RA09069F

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