非中性电解液的光子相关光谱

本文研究了非中性电解液光散射动态特性问题,导出了一元非中性电解液和二元非中性电解液的光子相关光谱。结果表明:它们的光子相关光谱是时间衰减谱,衰减系数同扩散系数只差因子q~2,微弱的非中性使利用光子相关光谱测得的扩散系数显著增加,且与散射角的关系更为密切。对于10~(-3)molar的稀薄电解液,1%的非中性就使扩散系数增大10~2～10~3倍以上。最后,本文对造成非中性效应的物理机制进行了分析。

Photon correlation spectra of unneutralized electrolyte solutions

In this paper we discuss the dynamic property of light scattering of unneutralized electrolyte solutions and the photon correlation spectra.The resultsshow that weak un-neutralization can largely increase the measured diffusion coefficient and, comparing with neutral electrolyte solution, the diffusion coefficient of unneutralized one is more sinsitive to the scattering angle. For a dilute electrolyte solution of 10-3 molar with unnentralization of 1%, an enhancement of 102-103 in the diffusion coefficient can be obtained. The physical mechanism of unneutralization effect is discussed.