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Small. 2016 Nov;12(42):5802-5808. doi: 10.1002/smll.201601207. Epub 2016 Sep 8.

Environmental Instability and Degradation of Single- and Few-Layer WTe2 Nanosheets in Ambient Conditions.

Author information

1
Department of Electrical Engineering & Computer Science, Case School of Engineering, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA.
2
Department of Physics and Engineering Physics, Tulane University, New Orleans, LA, 70118, USA.

Abstract

The ambient environmental instability and degradation mechanism of single- and few-layer WTe2 are investigated. Oxidation of W and Te atoms appears to be a main reason for degradation. Single-layer samples' Raman signals disappear within 20 min in air. Few-layer WTe2 exhibits saturating degradation behavior: only the top layer WTe2 is oxidized; the degraded layer can protect inner layers from further degradation.

KEYWORDS:

2D semiconductors; AES; Raman; degradation; nanosheets; tungsten ditelluride (WTe2)

PMID:
27607842
DOI:
10.1002/smll.201601207

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