Journal
RSC ADVANCES
Volume 9, Issue 7, Pages 3570-3576Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra09069f
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Funding
- European Research Council (ERC) [742145]
- ERC Starting Grant [2D-PnictoChem 804110]
- European Union [604391]
- Postdoctoral Junior Leader Fellowship Programme from la Caixa Banking Foundation
- Deutsche Forschungsgemeinschaft (DFG) [FLAG-ERA AB694/2-1]
- Generalitat Valenciana [SEJI/2018/034]
- FAU (Emerging Talents Initiative) [WS16-17_Nat_04]
- DFG [SFB 953]
- Cluster of Excellence Engineering of Advanced Materials
- MINECO through the Excellence Unit Maria de Maeztu [MDM-2015-0538]
- European Research Council (ERC) [742145] Funding Source: European Research Council (ERC)
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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.
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