Coadsorption of a polyanion and an azobenzene dye in self-assembled and spin-assembled polyelectrolyte multilayers

被引:34
作者
Campbell, VE
Chiarelli, PA
Kaur, S
Johal, MS [1 ]
机构
[1] Univ S Florida, New Coll, Div Nat Sci, Sarasota, FL 34243 USA
[2] Univ Oxford, Fac Clin Med, Oxford OX1 3JA, England
关键词
D O I
10.1021/cm048905p
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We describe the integration of a photochromic azobenzene dye into electrostatically bound polyelectrolyte multilayers. Two different deposition techniques are compared: electrostatic self-assembly (ESA) and polyelectrolyte spin-assembly. The polyelectrolytes used were PEI (polyethylenimine) and PAZO (poly[1-[4-(3-carboxy-4-hydroxyphenylazo) benzenesulfonamido]-1,2-ethanediyl, sodium salt]). Successful incorporation of the azobenzene dye Direct red 80 (DR80) into ESA and spin-assembled multilayered films (PEI/DR80) is demonstrated. We find that coadsorption of DR80 and PAZO on a PEI surface occur in different proportions and packing densities, depending on the assembly technique selected. We find that using DR80 as a coadsorbing agent can dramatically enhance the rate of PAZO adsorption, and we observe different deposition rates for DR80 and PAZO when the two materials adsorb simultaneously from a common solution.
引用
收藏
页码:186 / 190
页数:5
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