A SERS Study on Self-Assembly Process of 1-Hexanethiol on Ag Nanoparticles: Effects on Adsorption Time and Concentration
LUAN Xin-tong1, ZHOU Tie-li1，2, SUN Cheng-bin1, TAO Yan-chun1, ZHAO Bing1, WANG Xu1, RUAN Wei-dong1*
1. State Key Laboratory of Supramolecular Structure and Materials，Jilin University，Changchun 130012，China
2. College of Food Engineering and Landscape Architecture，Changchun University，Changchun 130012，China
Abstract：Surface-enhanced Raman scattering (SERS) is an ultra-sensitive spectroscopic technique which has great application prosepct in characterization of dynamic molecular structures. Self-assembled monolayers (SAMs) of alkanethiolates are a typical kind of ultrathin films which have tremendous applications in the fields of bionics, materials, electronics, biology and chemistry. In the present study, the SAM structures of 1-hexanethiol when adsorbing on Ag nanoparticles were explored. The vibrational modes of trans (T) and gauche (G) conformations were employed to illustrate the molecular structures. The intensity ratios of T and G bands concerning to C—S, C—C and CH3 groups indicate the crystallinity of the SAMs. The results show that when HT is in high concentrations the crystalline process is quick, while in low concentrations, the crystalline process is very slow. The dynamic study on the formation of SAM films is of great significance for the corrosion protection, device fabrication, and sensor applications.
栾昕彤，周铁莉，孙成彬，陶艳春，赵 冰，王 旭，阮伟东. 表面增强拉曼光谱研究正己硫醇分子在银基底表面自组装过程的时间和浓度因素影响[J]. 光谱学与光谱分析, 2017, 37(04): 1130-1133.
LUAN Xin-tong, ZHOU Tie-li, SUN Cheng-bin, TAO Yan-chun, ZHAO Bing, WANG Xu, RUAN Wei-dong. A SERS Study on Self-Assembly Process of 1-Hexanethiol on Ag Nanoparticles: Effects on Adsorption Time and Concentration. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(04): 1130-1133.
[1] Kennedy D，Norman C. Science，2005，309(5731)：75.
[2] Imae T，Torii H. Journal of Physical Chemistry B，2000, 104(39)：9218.
[3] Pan S，Belu A M，Ratner B D. Materials Science and Engineering C，1999，7(1)：51.
[4] Hu K，Bard A J. Langmuir，1998，14(17)：4790.
[5] Yamada R，Uosaki K. Langmuir，1998，14(4)：855.
[6] Zhang J D，Chi Q J，Ulstrup J. Langmuir，2006，22(14)：6203.
[7] Petri M，Kolb D M，Memmert U，et al. Electrochimica Acta，2003，49(1)：175.
[8] Ruan W D，Zhou T L，Hui G，et al. Journal of Colloid and Interface Science，2014，432：65.
[9] Meuse C W，Niaura G，Lewis M L. Langmuir，1998，14(7)：1604.
[10] Bain C D，Troughtoy B E，Tao Y T. Journal of the American Chemical Society，1989，111(1)：321.
[11] Meuse C W，Niaura G，Lewis M L，et al. Langmuir，1998，14(7)：1604.
[12] Rycenga M，McLellan J M，Xia Y. Chemical Physics Letters，2008，463(1-3)：166.
[13] Andrzej K. Journal of Raman Specroscopy，2003，34(10)：853.
