title: [Study of surface enhanced Raman scattering of trace trinitrotoluene based on silver colloid nanoparticles].
abstract: Trinitrotoluene (TNT), a representative nitroexplosive, attracts more and more attentions because of the urgent demand for trace analysis of explosives in recent years. The present study investigated the experiment condition of the surface enhanced Raman scattering (SERS) of 10(-6) mol x L(-1) TNT solution, especially the influence of NaCl and basic hydrolysis. The results indicate that SERS spectra of TNT can not be obtained when preparing the SERS samples without NaCl, and it was also shown that the intensity of Raman peaks has a relationship with the concentration of NaCl. With the increase in the concentration of NaCl, the intensity of Raman peak at 1 392 cm(-1) has a maximum value. This report explained the reason why NaCl can affect the intensity of SERS theoretically. It was also shown that the SERS spectrum of TNT treated with basic hydrolysis is more intense than that without basic hydrolysis.
authors.affiliation: The Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, Beijing Normal University, Beijing 100875, China. lingzi@mail.bnu.edu.cn
authors.forename: Chun-ling
authors.initials: CL
authors.lastname: Zhang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Li
authors.forename: Zheng-long
authors.initials: ZL
authors.lastname: Wu
authors.forename: De-jun
authors.initials: DJ
authors.lastname: Han