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Sonication-Assisted Liquid-Phase Exfoliated α-GeTe: A Two-Dimensional Material with high Fe3+ Sensitivity

Abstract

We describe sonication-assisted liquid-phase exfoliation of rhombohedral germanium telluride (α-GeTe) to obtain a good dispersion of α-GeTe nanosheets in ethanol. The thickness of the α-GeTe nanosheets is dependent on the exfoliation conditions, and few-layer α-GeTe nanosheets of 2-4 layers even monolayer α-GeTe were obtained. We use first-principle calculations to investigate the structural, electronic, and optical properties of monolayer and bulk α-GeTe and compare the optical band gap of centrifugally fractionated α-GeTe nanosheets dispersions to the computational predictions. We demonstrate that few layer α-GeTe nanosheets are purified selectively through centrifugation, and exhibit high sensitivity to Fe3+. The scalable production of two-dimensional α-GeTe nanosheets can be used in the future optoelectronic industry.

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Publication details

The article was received on 16 Apr 2018, accepted on 09 May 2018 and first published on 10 May 2018


Article type: Paper
DOI: 10.1039/C8NR03091J
Citation: Nanoscale, 2018, Accepted Manuscript
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    Sonication-Assisted Liquid-Phase Exfoliated α-GeTe: A Two-Dimensional Material with high Fe3+ Sensitivity

    P. Zhang, F. Zhao, P. Long, Y. Wang, Y. Yue, X. Liu, Y. Feng, R. Li, W. Hu, Y. Li and W. Feng, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR03091J

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