【摘要】 在阴离子表面活性剂十二烷基硫酸钠(SDS)和硫代乙酰胺(TAA)存在下,Ag+和S2-反应生成较稳定的Ag2S纳米微粒。它在470nm处产生1个较强的荧光峰,在470nm处产生1个共振散射峰。TAA和Ag+浓度对体系荧光强度的影响与此两种物质浓度对共振散射强度的影响一致,随着Ag+浓度(0~8·0×10-5mol·L-1)增大荧光和共振散射光强度均线性增大。实验结果表明,荧光与共振散射之间存在相关性。此荧光为液相Ag2S纳米微粒产生的固液界面荧光。更多还原

【Abstract】 S^2- and Ag⁺ form stable Ag₂S nanoparticles in the presence of sodium dodecyl sulphate（SDS）. It exhibits a strong （resonance） scattering peak at 470 nm and a strong fluorescence peak at 470 nm when excitation wavelength is at 200 nm. The effects of TAA and Ag⁺ concentration on the fluorescence intensities are consistent with those on the resonance scattering signals. The resonance scattering and fluorescence intensities all increase with Ag⁺ concentration in the range of 0-8.0×10^-5 mol·L^-1. The results verified that there is a correlation between the fluorescence and resonance scattering. The fluorescence is the interface fluorescence of Ag₂S （nanoparticles） in liquid phase.更多还原