在微通道内表面通过化学吸附组装上银纳米粒子制成了微通道表面增强拉曼散射( SERS)器件,其对常见探针分子罗丹明6G(R6G)和4-巯基吡啶(4-MPY)的最低检测浓度分别达到10-11和10-8 mol/L,说明其具有很好的增强效果。用该器件对2种有害化学药品进行了检测,三聚氰胺的最低检测浓度可到10-6 mol/L,而福美双的最低检测浓度可达到10-7 mol/L,说明所制备的微通道器件可用于对有害化学品的检测。微通道SERS器件具有体积小、取样少、制备简单、能够进行现场实时动态检测等特点,具有广阔的应用前景。%Surface-enhanced Raman scattering ( SERS )-based microchannel device was fabricated by self-assembling silver colloids. The detection limits of the device for rhodamine 6G(R6G) and 4-mercaptopyridine (4-MPY) were as low as 10-11 and 10-8 mol/L, respectively, therefore, the device is a very efficient SERS-active substrate. Furthermore, two hazardous chemicals, Thiram and Melamine, were detected by the micro-channel device. The detection limits for Melamine and Thiram were 10-6 and 10-7 mol/L, respectively. The results show that the microchannel device can be used to analyze these two harmful chemicals. It can be used as a miniature SERS sampling setup to detect trace amount of chemicals and for on-line or in-situ detection, and have the potential for the microanalysis of liquid chemicals.
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