Surface-enhanced Raman scattering for ultrasensitive chemical analysis of 1 and 2-naphthalenethiols
Surface-enhanced Raman scattering for ultrasensitive chemical analysis of 1 and 2-naphthalenethiols
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DOI：
10.1039/b410488a
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发表时间：
2004-01-01
期刊：
影响因子：
4.2
通讯作者：
Aroca, RF
中科院分区：
文献类型：
--
作者：
Alvarez-Puebla, RA;Dos Santos, DS;Aroca, RF
讨论了利用表面增强拉曼散射(SERS)对1-萘硫醇(1-NAT)和2-NAT(2-NAT)进行超声化学分析的最佳实验条件。报告首先回顾了目标分子的振动光谱，包括红外光谱和拉曼光谱，并在B3LYP/6-311G(d，p)理论水平上用局域密度泛函理论(DFT)对观察到的频率进行了解释。测试了几种金属纳米结构的SERS活性，包括岛状薄膜和银、金和铜的胶体。相应地，寻找了在可见光和近红外区激发最有效的激光谱线。在银纳米结构上，1-萘硫酚和2-萘硫酚的检测下限为齐托莫尔区。
The results of the search for the optimal experimental conditions for ultrasentitive chemical analysis of 1-naphthalenethiol (1-NAT) and 2-naphthalenethiol (2-NAT) using surface-enhanced Raman scattering (SERS) are discussed. The report begins with a review of the vibrational spectra, including infrared and Raman spectra of the target molecules, and the interpretation of the observed frequencies aided by local density functional theory (DFT) calculations at the B3LYP/6-311G(d,p) level of theory. Several metal nanostructures were tested for SERS activity, including island films and colloids of silver, gold and copper. Correspondingly, the most effective laser line for excitation in the visible and near infrared region was sought. The achieved detection limit for 1-naphthalenethiol, and for 2-naphthalenethiol, on silver nanostructures is in the zeptomole regime.