Kumar Keshendra, M Mohd Shafeeq, Kumar Pradip, Munjal Ritika, Mukhopadhyay Suman, Mondal Dehi Pada, Khan Mohd Akram, Vandana Vandana
Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
Industrial Waste Utilization, Nano and Biomaterials Division, CSIR - Advanced Materials and Processes Research Institute (CSIR-AMPRI), Bhopal, 462026, India.
Mikrochim Acta. 2024 May 30;191(6):357. doi: 10.1007/s00604-024-06425-x.
Super hydrophobic porous silicon surface is prepared using a wet chemical synthesis route. Scanning electron microscopic investigation confirms a correlation between pore size and reaction time. SERS substrates are prepared by silver nanoparticle deposition on porous silicon surface. They exhibit excellent characteristics in terms of sensitivity, reproducibility, stability, and uniformity. They could detect rhodamine 6G in femtomolar range with SERS enhancement factor of ~ 6.1 × 10, which is best ever reported for these substrates. Molecule-specific sensing of water pollutants such as methylene blue, glyphosate, and chlorpyrifos, is demonstrated for concentrations well below their permissible limits along with excellent enhancement factors. Porous silicon substrate functionalized with Ag nanoparticles demonstrates to be a promising candidate for low-cost, long-life, reliable sensors for environmental conservation applications.
采用湿化学合成路线制备了超疏水多孔硅表面。扫描电子显微镜研究证实了孔径与反应时间之间的相关性。通过在多孔硅表面沉积银纳米颗粒制备了表面增强拉曼散射（SERS）基底。它们在灵敏度、重现性、稳定性和均匀性方面表现出优异的特性。它们能够在飞摩尔范围内检测罗丹明6G，表面增强拉曼散射增强因子约为6.1×10，这是这些基底迄今报道的最佳结果。对于浓度远低于其允许限值的亚甲基蓝、草甘膦和毒死蜱等水污染物，展示了分子特异性传感，同时具有优异的增强因子。用银纳米颗粒功能化的多孔硅基底被证明是用于环境保护应用的低成本、长寿命、可靠传感器的有前途的候选者。
