Differentiation of illicit drugs with THz time-domain spectroscopy  

作　　者：LIU Guifeng MA Shihua JI Te ZHAO Hongwei WANG Wenfeng 

机构地区：[1]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

出　　处：《Nuclear Science and Techniques》2010年第4期209-213,共5页核技术（英文）

基　　金：Supported by the National Natural Science Foundation of China(Grant No.10675158);the Shanghai Municipal Commission of Science and Technology(Grant No.06dj14008)

摘　　要：The terahertz time-domain spectroscopy(THz-TDS) was used for sensing and identifying illicit drugs.The absorption spectra of seven illicit drug samples(morphine and its hydrochloride,cocaine hydrochloride,codeine phosphate,papaverine hydrochloride,pethidine hydrochloride,and thebaine) were studied by THz-TDS at 0.3-2.0 THz at room temperature.The geometric structure and vibration frequencies of morphine were calculated by density functional theory.The four absorption features were dominated by intra-/inter-molecular collective or lattice vibration modes.Each illicit drug has a distinct signature in its THz spectra.The results indicate that the THz-TDS can be used to identify and discriminate illicit drugs by their characteristic fingerprints.The terahertz time-domain spectroscopy （THz-TDS） was used for sensing and identifying illicit drugs. The absorption spectra of seven illicit drug samples （morphine and its hydrochloride, cocaine hydrochloride, codeine phosphate, papaverine hydrochloride, pethidine hydrochloride, and thebaine） were studied by THz-TDS at 0.3-2.0 THz at room temperature. The geometric structure and vibration frequencies of morphine were calculated by density functional theory. The four absorption features were dominated by intra-/inter-molecular collective or lattice vibration modes. Each illicit drug has a distinct signature in its THz spectra. The results indicate that the THz-TDS can be used to identify and discriminate illicit drugs by their characteristic fingerprints.

关 键 词：太赫兹时域光谱 THZ 毒品 密度泛函理论 盐酸吗啡 吸收光谱 盐酸盐 振动频率 

分 类 号：O434.3[机械工程—光学工程] TN817[理学—光学]