Hao Rui, Li Xiaodie, Zhang Lingling, Zhang Lei, You Hongjun, Fang Jixiang
Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China.
Key Laboratory of Physical Electronics and Devices of Ministry of Education & Shaanxi Key Laboratory of Information Photonic Technique, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China.
Nanoscale. 2022 Jul 28;14(29):10449-10455. doi: 10.1039/d2nr02593k.
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have been widely investigated for optoelectronic applications. Here, by employing the nanocasting method, molybdenum disulfide (MoS) nanostructures, including supercrystals, nanoparticles and nanowires, are synthesized with curved features by changing the precursor concentration and template types. The Raman properties of different MoS nanostructures are investigated by varying the laser power under both resonant and non-resonant excitations. The defect disorder induced LA() mode and other silent Raman modes in planar 2D materials are clearly observed under the resonant excitation. We believe that the varying optical properties of TMDC nanostructures will greatly broaden the optoelectronic applications of 2D materials.
二维（2D）过渡金属二硫属化物（TMDCs）已被广泛研究用于光电子应用。在此，通过采用纳米铸造法，通过改变前驱体浓度和模板类型，合成了具有弯曲特征的二硫化钼（MoS）纳米结构，包括超晶体、纳米颗粒和纳米线。通过在共振和非共振激发下改变激光功率，研究了不同MoS纳米结构的拉曼特性。在共振激发下，清晰地观察到平面二维材料中缺陷无序诱导的LA（）模式和其他沉默拉曼模式。我们相信，TMDC纳米结构变化的光学性质将极大地拓宽二维材料的光电子应用。
