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	Photoresponsive layer-by-layer ultrathin films prepared from a hyperbranched azobenzene-containing polymeric diazonium salt
	Li, Xinyang ; Fan, Pengwei ; Tuo, Xinlin ; He, Yaning ; Wang, Xiaogong
	2010-10-12 ; 2010-10-12
关键词	Hyperbranched Azobenzene-containing Polymeric diazonium salt Layer-by-layer Ultrathin film ASSEMBLED POLYELECTROLYTE MULTILAYERS CHARGE-TRANSFER INTERACTION SURFACE-RELIEF GRATINGS AZO-COUPLING REACTION LIQUID-CRYSTALS ADSORPTION STORAGE LIGHT DYES Materials Science, Multidisciplinary Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter
中文摘要	In this work, a hyperbranched diazonium salt (HB-DAS), prepared through azo-coupling reaction of an AB(2) monomer (N, N-bis[2-(4-aminobenzoyloxy)ethyl]aniline), was used to prepare self-assembled multilayers and ultrathin films. Multilayer films were fabricated by dipping substrates in HB-DAS and other polyelectrolyte solutions alternately in a layer-by-layer (LBL) manner. It was somewhat surprising to observe that HB-DAS forms multilayer films with either a polyanion (poly(styrenesulfonate sodium salt), PSS) or a polycation (poly(diallydimethylammonium chloride), PDAC) through alternate deposition in the solutions. Ultrathin films were formed in a sequential growth manner by dipping the substrates in the HB-DAS solution, washing with deionized water and drying repeatedly. In all the processes, the absorbance and thickness of the thin films linearly increase as the number of the dipping cycle increases. HB-DAS/PSS multilayer possesses an obviously larger bilayer thickness and lower density compared with the other two counterparts. The drying step after each deposition is necessary for the HB-DAS ultrathin film growth through the repeated dip-coating of HB-DAS. The multilayer and ultrathin films prepared by the above methods all show high resistance to erosion by organic solvents. The multilayers and ultrathin films exhibit photoinduced dichroism upon the irradiation of a polarized Ar+ laser beam. (C) 2008 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE SA ; LAUSANNE ; PO BOX 564, 1001 LAUSANNE, SWITZERLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79402]
专题	清华大学
推荐引用方式 GB/T 7714	Li, Xinyang,Fan, Pengwei,Tuo, Xinlin,et al. Photoresponsive layer-by-layer ultrathin films prepared from a hyperbranched azobenzene-containing polymeric diazonium salt[J],2010, 2010.
APA	Li, Xinyang,Fan, Pengwei,Tuo, Xinlin,He, Yaning,&Wang, Xiaogong.(2010).Photoresponsive layer-by-layer ultrathin films prepared from a hyperbranched azobenzene-containing polymeric diazonium salt..
MLA	Li, Xinyang,et al."Photoresponsive layer-by-layer ultrathin films prepared from a hyperbranched azobenzene-containing polymeric diazonium salt".(2010).

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