Ma Yun, Pang Yuehong, Liu Fei, Xu Hanqi, Shen Xiaofang
State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China.
State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jan 15;153:206-11. doi: 10.1016/j.saa.2015.08.004. Epub 2015 Aug 10.
Silver nanoparticles (AgNPs) were successfully prepared in aqueous solution by a one-pot procedure based on a rapid microwave-assisted green approach. L-Cysteine acted as a capping agent in the process of AgNP formation. The structural and morphological characteristics of the L-cysteine-capped AgNPs were investigated by the UV-vis, CD, FL, FTIR, XRD, TEM and EDX analysis. It was found that the well-dispersed crystalline AgNPs were formed after irradiation for 90 s and had sphere-like morphology. Such strategy may facilitate new ways to the synthesis of other metal nanoparticles, such as Au, Pt and Pd. In addition, the synthesized AgNPs were developed as a platform for the detection of Hg(2+) and showed a high sensitivity on the order of 1×10(-8) M. This sensing system could discriminate Hg(2+) from a wide range of cations (Ca(2+), Ba(2+), Mn(2+), etc.). The selectivity and sensitivity of AgNPs indicated its potential use as a sensor for Hg(2+) detection in the ecosystems.
通过基于快速微波辅助绿色方法的一锅法，在水溶液中成功制备了银纳米颗粒（AgNPs）。在AgNP形成过程中，L-半胱氨酸充当封端剂。通过紫外可见光谱、圆二色光谱、荧光光谱、傅里叶变换红外光谱、X射线衍射、透射电子显微镜和能谱分析研究了L-半胱氨酸封端的AgNPs的结构和形态特征。结果发现，照射90秒后形成了分散良好的结晶AgNPs，其形态为球形。这种策略可能为合成其他金属纳米颗粒（如金、铂和钯）提供新方法。此外，合成的AgNPs被开发为检测Hg(2+)的平台，对1×10(-8) M量级的Hg(2+)表现出高灵敏度。该传感系统可以区分Hg(2+)与多种阳离子（Ca(2+)、Ba(2+)、Mn(2+)等）。AgNPs的选择性和灵敏度表明其在生态系统中作为Hg(2+)检测传感器的潜在用途。
