Abstract
This article reports the fabrication and characterization of a novel type photoresponsive colloids composed of two amphiphilic azo polymers. The colloids were built up by using an amphiphilic random azo copolymer (PEAPE) and a polydispersed azo homopolymer (BP-AZ-CA), which were functionalized with azobenzene type and pseudo-stilbene type chromophores, respectively. The colloids were prepared by gradually adding deionized water into a THF solution containing both PEAPE and BP-AZ-CA. In order to study the influence of the preparation conditions on the colloid composition and structure, the colloids were also prepared by mixing two THF−H2O solutions or dispersions of the polymers with different initial water content (Cw0) and then adding water into the mixture. When mixing the solutions with Cw0 below the critical water content (CWC), uniform colloidal spheres composed of the two polymers could be obtained. Upon irradiation of a linearly polarized Ar+ laser beam, the hybrid colloidal spheres were deformed t...
Published Version
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