十二烷基硫酸钠(SDS)增强若丹明6G水溶液激光激发荧光谱研究

Study on Sodium Lauryl Sulfate (SDS) Induced Fluorescence Enhancement of Rhodamine 6G in Water Solution Excited by 532 nm Laser

报道了若丹明6G水溶液添加不同浓度的表面活性剂十二烷基硫酸钠(SDS)时激光激发染料的变化,发现较低的掺入量导致R6G荧光减弱,适量SDS的加入使荧光增强,在5×10-5mol·L-1的R6G水溶液中,加入6×10-2mol·L-1SDS,荧光增强因子达到3.1。当R6G浓度为1×10-4mol·L-1时,加入2×10-2mol·L-1,染料激光阈值显著降低。测量了不同浓度的R6G溶液的吸收光谱及加入不同浓度SDS后的荧光谱,分析了不同SDS加入量下R6G荧光减弱及增强的物理机制。

It is reported that the Rhodamine 6G fluorescence in water solution changes with different concentration SDS excited by a 532 nm laser. A small amount of SDS in Rhodamine 6G water solution will reduce the intensity of fluorescence. More SDS enhances R6G fluorescence. The enhancement ratio can reach up to 3.1 when SDS concentration is 6 X 10(-2) mol(.)L(-1) in 5 X 10(-5) mol(.)L(-1) R6G water solution. Dye laser threshold decreases when SDS concentration is 2 X 10(-2) mol(.)L(-1) in 1 X 10(-4) mol(.)L(-1) R6G water solution. The physical mechanism of the phenomena is analyzed by the absorption spectra of different concentration R6G water solutions and the fluorescence spectra of R6G water solutions adulterated with different concentration SDS.