title: Facile method for the fabrication of robust polyelectrolyte multilayers by post-photo-cross-linking of azido groups.
abstract: In this letter, we have developed a facile method to enhance the stability of polyelectrolyte multilayers. We fabricate conventional polyelectrolyte multilayers of PAH/PAA through electrostatic layer-by-layer (LbL) assembly and then postinfiltrate photosensitive cross-linking agent 4,4'-diazostilbene-2,2'-disulfonic acid disodium salt into the LbL films. After cross-linking by UV irradiation, the stability of the photo-cross-linked multilayer is highly improved as evidenced by the lack of dissolution under ultrasonication in saturated SDS aqueous solutions for 10 min. Moreover, by taking advantage of the different stability of the LbL film before and after UV irradiation, a patterned surface can be achieved.
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 10029, China.
authors.forename: Xiaosa
authors.initials: X
authors.lastname: Zhang
authors.forename: Chao
authors.initials: C
authors.lastname: Jiang
authors.forename: Mengjiao
authors.initials: M
authors.lastname: Cheng
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhou
authors.forename: Xiaoqun
authors.initials: X
authors.lastname: Zhu
authors.forename: Jun
authors.initials: J
authors.lastname: Nie
authors.forename: Yajun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qi
authors.initials: Q
authors.lastname: An
authors.forename: Feng
authors.initials: F
authors.lastname: Shi
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D001386:Azides / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000737:chemistry*; D004573:Electrolytes / Q000737:chemistry; D008567:Membranes, Artificial; D015394:Molecular Structure; D011073:Polyamines / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D000180:Acrylic Resins; D001386:Azides; D003432:Cross-Linking Reagents; D004573:Electrolytes; D008567:Membranes, Artificial; D011073:Polyamines; C063994:polyallylamine; C006903:carbopol 940