Self-assembly of a dithiocarbamate calix[4] arene on Ag nanoparticles and its application in the fabrication of surface-enhanced Raman scattering based nanosensors
Self-assembly of a dithiocarbamate calix[4] arene on Ag nanoparticles and its application in the fabrication of surface-enhanced Raman scattering based nanosensors
复制标题
DOI：
10.1039/b812811a
复制
发表时间：
2009-01-01
影响因子：
3.3
通讯作者：
Sanchez-Cortes, Santiago
中科院分区：
文献类型：
--
作者：
Guerrini, Luca;Garcia-Ramos, Jose V.;Sanchez-Cortes, Santiago
用表面增强拉曼光谱(SERS)表征了二硫代氨基甲酸杯[4]芳烃衍生物(DTCX)在银纳米颗粒(NPs)上的吸附和自组装行为。用柠檬酸钠和盐酸羟胺两种不同的还原剂对硝酸银化学还原法制备纳米银进行了研究。表面增强拉曼光谱能够区分DTCX在不同表面覆盖物上吸附和自组装时所采用的不同构象和相互作用几何构型。结构标记条带的鉴定在本研究中至关重要。此外，DTCX所采用的结构对于确定该杯芳烃作为检测污染物的分子宿主的活性非常重要，因为过度打开或关闭的空腔对于分析物检测是无效的。
The absorption and self-assembly of a dithiocarbamate calix[4] arene derivative (DTCX) on Ag nanoparticles (NPs) was characterized in this work by surface-enhanced Raman scattering (SERS). This study was carried out on Ag NPs prepared by chemical reduction of silver nitrate with two different reducing agents: sodium citrate or hydroxylamine hydrochloride. SERS was able to discriminate between the different conformations and interaction geometries adopted by DTCX when adsorbed and self-assembled on Ag NPs at different surface coverings. The identification of structural marker bands was crucial in this study. Furthermore, the structure adopted by DTCX is important to determine the activity of this calixarene as a molecular host to detect pollutants, such as pyrene (PYR), since an excessively open or closed cavity is not efficient regarding the analyte detection.