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Layered SnSe nano-plates with excellent in-plane anisotropic properties of Raman spectrum and photo-response
Nanoscale ( IF 5.8 ) Pub Date : 2017-09-08 00:00:00 , DOI: 10.1039/c7nr05047j Xuan-Ze Li 1, 2, 3, 4, 5 , Jing Xia 1, 2, 3, 4, 5 , Lei Wang 1, 2, 3, 4, 5 , Yi-Yi Gu 1, 2, 3, 4, 5 , Hua-Qiu Cheng 1, 2, 3, 4, 5 , Xiang-Min Meng 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2017-09-08 00:00:00 , DOI: 10.1039/c7nr05047j Xuan-Ze Li 1, 2, 3, 4, 5 , Jing Xia 1, 2, 3, 4, 5 , Lei Wang 1, 2, 3, 4, 5 , Yi-Yi Gu 1, 2, 3, 4, 5 , Hua-Qiu Cheng 1, 2, 3, 4, 5 , Xiang-Min Meng 1, 2, 3, 4, 5
Affiliation
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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.
中文翻译：
具有出色的拉曼光谱和光响应平面内各向异性特性的层状SnSe纳米板
二维（2D）材料的光学，电子和热学特性的面内各向异性已经吸引了人们的极大兴趣，这是因为开发新型器件具有巨大的潜在应用前景。在这项工作中，通过极化拉曼系统获得了层状SnSe纳米板的出色的角度依赖性拉曼特性，并证实了两种A g模式（130 cm -1和150 cm -1的拉曼极化方向）。）与SnSe薄片在室温和低温下平行极化构型下的特定结晶方向（曲折方向或扶手椅方向）一致。此外，SnSe纳米板器件在90°循环周期的常温和低温（150 K）下显示出出色的角度分辨光响应，并且极化方向也沿之字形方向和扶手椅方向，这归因于独特的面内不对称晶体结构。这些突出的面内各向异性特性提供了一种精确，快速的方法来确定SnSe纳米薄片的晶体取向，并开辟了2D非对称结构材料的新应用。
更新日期：2017-09-21
中文翻译：
具有出色的拉曼光谱和光响应平面内各向异性特性的层状SnSe纳米板
二维（2D）材料的光学，电子和热学特性的面内各向异性已经吸引了人们的极大兴趣，这是因为开发新型器件具有巨大的潜在应用前景。在这项工作中，通过极化拉曼系统获得了层状SnSe纳米板的出色的角度依赖性拉曼特性，并证实了两种A g模式（130 cm -1和150 cm -1的拉曼极化方向）。）与SnSe薄片在室温和低温下平行极化构型下的特定结晶方向（曲折方向或扶手椅方向）一致。此外，SnSe纳米板器件在90°循环周期的常温和低温（150 K）下显示出出色的角度分辨光响应，并且极化方向也沿之字形方向和扶手椅方向，这归因于独特的面内不对称晶体结构。这些突出的面内各向异性特性提供了一种精确，快速的方法来确定SnSe纳米薄片的晶体取向，并开辟了2D非对称结构材料的新应用。
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