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Issue 38, 2017
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Layered SnSe nano-plates with excellent in-plane anisotropic properties of Raman spectrum and photo-response

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Abstract

In-plane anisotropy in optical, electronic and thermal properties of two-dimensional (2D) materials has attracted significant interest because of the huge potential applications for developing novel devices. In this work, outstanding angle-dependent Raman property of layered SnSe nano-plates is obtained via polarized Raman system and it is confirmed that the Raman polarization directions of two Ag modes (130 cm−1 and 150 cm−1) are consistent with specific crystalline directions (zigzag direction or armchair direction) of SnSe flakes under parallel polarization configuration at home temperature and low temperature. Furthermore, the SnSe nano-plate devices show excellent angle-resolved photo-response at home temperature and low temperature (150 K) with a 90° cycle period and the polarized directions are also along zigzag direction and armchair direction, which is ascribed to the unique in-plane asymmetric crystal structure. These prominent in-plane anisotropic properties provide a precise and rapid method to determine the crystal orientation of SnSe nano-flakes and open up the new applications of 2D asymmetric structure materials.

Graphical abstract: Layered SnSe nano-plates with excellent in-plane anisotropic properties of Raman spectrum and photo-response

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Publication details

The article was received on 12 Jul 2017, accepted on 08 Sep 2017 and first published on 08 Sep 2017


Article type: Paper
DOI: 10.1039/C7NR05047J
Citation: Nanoscale, 2017,9, 14558-14564
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    Layered SnSe nano-plates with excellent in-plane anisotropic properties of Raman spectrum and photo-response

    X. Li, J. Xia, L. Wang, Y. Gu, H. Cheng and X. Meng, Nanoscale, 2017, 9, 14558
    DOI: 10.1039/C7NR05047J

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