国产一卡2卡三卡4卡麻豆_了解最新日韩草逼视频_h片在线播放一区_国产激情影视在线_好了av四色综合无码久久_欧美黑白双插OOR720P_日本精品中文字幕在线_秋霞午夜手机影院_亚洲国产一区二区3da毛片_欧美杂交深喉video中文字幕

文獻名：Colorimetric captopril assay based on oxidative etching-directed morphology control of silver nanoprisms 

作者： Pu Zhang, Li Wang, Jing Zeng, Juan Tan, Yunfei Long & Yi Wang

College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China

摘要：Oxidative etching is an effective approach to control the morphology of nanomaterials. Taking silver nanocrystals (AgNCs) as an example, oxidative etching-directed morphological transformation from a triangular prism shape to a disk shape is achieved and then applied to the determination of captopril. As a mediator, trace amount of halides play important roles in the shape-controlled evolution of AgNCs. Etching causes the color of the triangular silver nanoprims (AgNPRs) to change from blue to yellow on formation of round nanodisks. On addition of captopril, the oxidative etching of the AgNPRs is prevented owing to the protection by the drug via Ag-S bonding. In this case, the solution color does not change. This finding was used to design an assay of captopril that has a linear response in the 10–600 nM concentration range and a 2 nM limit of detection. This method also allows digital camera read-out. It was successfully applied to quality control of captopril in tablets.