阳离子激光染料吸附入聚合物/表面活性剂的薄膜

利用静电吸附技术将阳离子激光染料罗丹明6G(R6G)成功组装到预组装在石英衬底上聚电解质/表面活性剂的复合膜中. 聚丙烯胺盐酸盐(PAH)和十二烷基硫酸钠(SDS)分别作为阳离子和阴离子表面活性剂. 紫外可见吸收光谱表征揭示水溶液中仅形成H-型的R6G聚合物，而PAH/SDS/R6G薄膜同时存在H和J型两种R6G聚合物. R6G吸附动力学表明PAH/SDS/R6G复合薄膜两个聚集带的吸收强度比与用于制备PAH/SDS自组装薄膜的SDS溶液浓度无关. 原子力显微镜揭示R6G在PAH/SDS/R6G复合薄膜的

Adsorption of Cationic Laser Dye onto Polymer/Surfactant Complex Film

Fabrication of complex molecular films of organic materials is one of the most important issues in modern nanoscience and nanotechnology. Soft materials with flexible properties have been given much attention and can be obtained through bottom up processing from functional molecules, where self-assembly based on supramolecular chemistry and designed assembly have become crucial processes and technologies. In this work, we report the successful incorporation of cationic laser dye rhodamine 6G abbreviated as R6G into the pre-assembled polyelectrolyte/surfactant complex film onto quartz substrate by electrostatic adsorption technique. Poly(allylamine hydrochloride) (PAH) was used as polycation and sodium dodecyl sulphate (SDS) was used as anionic surfactant. UV-Vis absorption spec-troscopic characterization reveals the formation of only H-type aggregates of R6G in their aqueous solution and both H- and J-type aggregates in PAH/SDS/R6G complex layer-by-layber films as well as the adsorption kinetics of R6G onto the complex films. The ratio of the absorbance intensity of two aggregated bands in PAH/SDS/R6G complex films is merely independent of the concentration range of the SDS solution used to fabricate PAH/SDS com-plex self-assembled films. Atomic force microscopy reveals the formation of R6G aggregates in PAH/SDS/R6G complex films.