Furletov Aleksei, Apyari Vladimir, Volkov Pavel, Torocheshnikova Irina, Dmitrienko Stanislava
Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
Scientific-Research Institute of Chemical Reagents and Special Purity Chemicals, National Research Center "Kurchatov Institute", 107076 Moscow, Russia.
Sensors (Basel). 2023 Sep 20;23(18):7994. doi: 10.3390/s23187994.
Adsorption of silver nanoparticles on polymers may affect the processes in which they participate, adjusting the analytical characteristics of methods for the quantitation of various substances. In the present study, a composite material based on silver triangular nanoplates (AgTNPs) and polyurethane foam was proposed for chemical analysis. The prospects of its application for the solid-phase/colorimetric determination of organic thiols were substantiated. It was found that aggregation of AgTNPs upon the action of thiols is manifested by a decrease in the AgTNPs' localized surface plasmon resonance band and its significant broadening. Spectral changes accompanying the process can be registered using household color-recording devices and even visually. Four thiols differing in their functional groups were tested. It was found that their limits of detection increase in the series cysteamine < 2-mercaptoethanol < cysteine = 3-mercaptopropionic acid and come to 50, 160, 500, and 500 nM, respectively. The applicability of the developed approach was demonstrated during the analysis of pharmaceuticals and food products.
聚合物上银纳米颗粒的吸附可能会影响它们所参与的过程，从而调整各种物质定量分析方法的分析特性。在本研究中，提出了一种基于三角形银纳米片（AgTNPs）和聚氨酯泡沫的复合材料用于化学分析。证实了其在有机硫醇固相/比色测定中的应用前景。发现硫醇作用下AgTNPs的聚集表现为AgTNPs局部表面等离子体共振带的降低及其显著展宽。伴随该过程的光谱变化可以使用家用颜色记录设备甚至肉眼观察到。测试了四种官能团不同的硫醇。发现它们的检测限按半胱胺＜2-巯基乙醇＜半胱氨酸 = 3-巯基丙酸的顺序增加，分别达到50、160、500和500 nM。在药物和食品分析中证明了所开发方法的适用性。
