论文部分内容阅读
研制了一种新型凹锥形表面增强拉曼散射(SERS)光纤探针,研究了光纤探针凹锥形结构的制备方法,分析了凹锥光纤探针形貌与腐蚀时间的关系,通过化学自组装法将金纳米颗粒固化到凹锥内表面,制成凹锥SERS光纤探针,并测试了其远程SERS检测性能。结果表明,凹锥形光纤探针具有更低的光纤拉曼光谱背底,约为同种光纤制备的锥形探针的1/3;在633nm的激发波长下,固化金纳米颗粒的凹锥探针对于罗丹明6G(R6G)溶液的拉曼光谱远程检测浓度低至100nmol/L。这种凹锥形结构使基底不易脱落,探针不易损坏。基于上述优点,该种凹锥形光纤探针可能在SERS远程检测领域具有潜在的应用价值。
A new type of concave conical surface enhanced Raman scattering (SERS) fiber probe was developed. The preparation method of the concave conical fiber probe was studied. The relationship between the morphology of the concave conical fiber probe and the etching time was analyzed. The self-assembly method was used to immobilize the Au nanoparticles into the concave cone inner surface to make the concave cone SERS fiber probe and to test the remote SERS detection performance. The results show that the concave conical fiber probe has a lower fiber Raman spectrum background, which is about 1/3 of that of the conical probes prepared by the same type of fiber. At the excitation wavelength of 633 nm, the concave conic of the solidified gold nano particles Raman spectroscopy of the probe for rhodamine 6G (R6G) solution was as low as 100 nmol / L. This concave conical structure so that the substrate is not easy to fall off, the probe is not easily damaged. Based on the above advantages, the concave conical fiber probe may have potential applications in the field of SERS remote detection.