Micro-Raman investigations on the structures of the surface and the inner of MgSO_4 droplets  

作　　者：WANG Feng SHOU JingJing ZHANG YunHong 

机构地区：[1]The Institute of Chemical Physics, Beijing Institute of Technology, Beijing 100081, China

出　　处：《Chinese Science Bulletin》2008年第15期2414-2416,共3页

基　　金：the National Natural Science Foundation of China (Grant Nos. 20673010 and 20640420450);the "111" Project (Grant No. B07012);the Incu-bation and Reward Foundation for Excellent Doctoral Dissertation of Beijing Insti-tute of Technology

摘　　要：Spherical MgSO4 droplets were deposited by a syringe on the hydrophobic Teflon substrate. Using micro-Raman technique, the laser beam was highly focused twice on the surface and in the center of spherical droplets. The Raman spectra for the surface and the inner of MgSO4 droplets were accord-ingly obtained, suggesting formation of a thin layer of gels on MgSO4 droplets at low relative humidity. The gel layer covered the surface and exhibited a significant delay in response to the change of ambi-ent relative humidity, resulting in the structural difference between the surface and the inner of MgSO4 droplets.Spherical MgSO4 droplets were deposited by a syringe on the hydrophobic Teflon substrate. Using micro-Raman technique, the laser beam was highly focused twice on the surface and in the center of spherlcel droplets. The Raman spectra for the surface and the inner of MgSO4 droplets were accordingly obtained, suggesting formation of a thin layer of gels on MgSO4 droplets at low relative humidity. The gel layer covered the surface and exhibited a significant delay in response to the change of amblent relative humidity, resulting in the structural difference between the surface and the inner of MgSO4 droplets.

关 键 词：MgSO4滴液 凝胶结构 表面结构 群体传输 

分 类 号：O64[理学—物理化学]