二硫化钨二维材料制备及其表面增强拉曼散射性能研究

Preparation and surface enhanced Raman scattering properties of tungsten disulfide two-dimensional materials

摘要:

WS2二维材料的大面积可控制备一直是二维材料基础研究中亟须解决的难题，基于化学气相沉积法，探索了反应过程中蒸发硫时刻、最高反应温度、衬底摆放位置等实验参数，对制备WS2二维材料的影响，并成功制备了边长达80 μm的三角形单层WS2纳米片．此外，还将WS2二维材料作为表面增强拉曼散射（SERS）传感器的新型衬底，并以罗丹明6G作为探针分子，初步研究了WS2二维材料的SERS性能．实验结果表明，WS2二维材料对罗丹明6G分子的检出极限可低至1×10-6 mol/L，将为新型SERS衬底的开发和应用提供一种新的方案和思路．

Abstract:

The large area of controllable preparation of tungsten disulfide （WS2） two-dimensional materials has always been an urgent problem to be solved in the basic research of two-dimensional materials. Based on the chemical vapor deposition method， the influences of experimental parameters such as the time of evaporation of sulfur， the maximum reaction temperature and the adjustment of substrate position on the preparation of WS2 two-dimensional materials have been explored. A triangular monolayer WS2 nanosheet with a side length of 80 μm was successfully prepared. In addition， WS2 two-dimensional materials were used as a new substrate for the surface enhanced Raman scattering（SERS） sensor， and rhodamine 6G was used as the probe molecule to preliminarily study the SERS performance of WS2 two-dimensional materials. The experimental results show that the detection limit of WS2 two-dimensional materials for rhodamine 6G molecule can be as low as 1×10-6 mol/L. In this paper， the authors will provide a new scheme and idea for the development and application of a new SERS substrate.