School of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.
School of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Aug 5;236:118336. doi: 10.1016/j.saa.2020.118336. Epub 2020 Apr 12.
As a new class of two-dimensional material, MXene not only has the unique planar structure, electronic and optical properties, but also has a large surface area and hydrophilicity, which make them to build as potential SERS substrates with good sensitivity and stability. In this work, we reported a modified method by adjusting the ratio of HCl to LiF and reducing sonicate time to form large-sized monolayer TiCT nanosheets. SERS performance of TiCT was demonstrated by detecting dye molecules such as CV, R6G and MG. A remarkable enhanced effect was obtained, and Raman signals up to 10 M could be detected. Furthermore, the relationship between SERS effects and illumination laser wavelengths of different probe molecules has been studied, the results showed the selectivity between dye molecules and the excitation wavelengths. Besides, the uniformity and stability of the substrates have been proved by mapping experiments in a large area (80 × 80 μm). The results demonstrated that TiCT nanosheets can be built as lager-sized, uniform and stable sensor for ultra-sensitive detection of organic dye pollutant molecules.
作为一类新型的二维材料，MXene 不仅具有独特的平面结构、电学和光学性质，而且具有较大的表面积和亲水性，这使得它们能够构建具有良好灵敏度和稳定性的潜在 SERS 基底。在这项工作中，我们通过调整 HCl 与 LiF 的比例并减少超声时间来形成大尺寸单层 TiCT 纳米片，报道了一种改进的方法。我们通过检测 CV、R6G 和 MG 等染料分子来证明 TiCT 的 SERS 性能。获得了显著的增强效果，并且可以检测到高达 10^-6 M 的拉曼信号。此外，还研究了不同探针分子的 SERS 效应与光照激光波长之间的关系，结果表明了染料分子与激发波长之间的选择性。此外，通过在大面积（80×80 μm）上进行映射实验证明了基底的均匀性和稳定性。结果表明，TiCT 纳米片可用作超灵敏检测有机染料污染物分子的大尺寸、均匀和稳定的传感器。
