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In situ Investigation on Layer-by-Layer Deposition of Polyelectrolytes by Quartz Crystal Microbalance
Yun-feng Yan,Guang-ming Liu,Ye-cang Tang,Guang-zhao Zhang¤
Author NameAffiliationE-mail
Yun-feng Yan Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Guang-ming Liu Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Ye-cang Tang Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Guang-zhao Zhang¤ Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China gzzhang@ustc.edu.cn 
Abstract:
The effect of salt concentration on layer-by-layer deposition of poly(sodium 4-styrene sulfonate) (PSSS)/poly(vinylbenzyl trimethylammonium chloride) (PVTC) was investigated by use of quartz crystal microbalance with dissipation (QCM-D). The changes in frequency and dissipation demonstrate that the addition of NaCl leads the thickness of PSSS/PVTC multilayer to increase. The deposition of PSSS/PVTC is dominated by surface charge overcompensation level at lower salt concentrations. However, it is mainly determined by the interpenetration of polyelectrolytes at a higher salt concentration, as reflected in the oscillation of dissipation change.
Key words:  Polyelectrolyte, Layer-by-layer deposition, Quartz crystal microbalance
FundProject:NNSFC (20474060)
In situ Investigation on Layer-by-Layer Deposition of Polyelectrolytes by Quartz Crystal Microbalance
燕云峰,刘光明,唐业仓,张广照¤
摘要:
利用带有耗散测量功能的石英晶体微天平(QCM-D),研究了聚苯乙烯磺酸钠(PSSS)和聚乙烯基苄基三甲基氯化铵(PVTC)的层叠层组装. QCM-D中频率和耗散两个参数的变化表明加入NaCl导致PSSS/PVTC多层膜的厚度增加. 在NaCl浓度较低时,组装由表面电荷反转水平决定;而在NaCl浓度较高时,则由相邻层间聚电解质链的渗透程度决定.
关键词:  聚电解质,层叠层组装,石英晶体微天平
DOI:10.1088/1674-0068/21/03/291-294
分类号: