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Zhao, Wen Bo,Park, Jeongju,Caminade, Anne-Marie,Jeong, Seong-Jun,Jang, Yoon Hee,Kim, Sang Ouk,Majoral, Jean-Pierre,Cho, Jinhan,Kim, Dong Ha Royal Society of Chemistry 2009 Journal of materials chemistry Vol.19 No.14
<P>Multilayer thin films of anionic gold nanoparticles (Au<SUB>NPs</SUB>) and cationic phosphorus dendrimers were deposited on 3-(diethoxymethyl-silyl)propylamine (3-APDMES)-coated substrates using layer-by-layer (LbL) assembly driven by electrostatic interactions. The growth of Au/dendrimer multilayers composed of Au<SUB>NPs</SUB> with diameters of ∼3 nm and ∼16 nm and dendrimer with ∼2 nm diameter was monitored by UV-vis spectroscopy. The relative amounts of Au<SUB>NPs</SUB> and dendrimers in the multilayer films were calculated using a quartz crystal microbalance. The Au-containing multilayers have two surface plasmon bands at ∼530 nm and ∼600 nm, where the latter exhibits a red shift upon increasing the areal density of AuNPs as well as increasing the layer number. The localized surface plasmon resonance (LSPR) band of the hybrid films can be tuned by adding NaCl to the dendrimer solution or by removing the organic matrix. These results demonstrate that the near-field coupling between the LSPR bands of neighboring Au layers is responsible for the controlled absorption behavior. Au mesoporous films after removing dendrimers show LSPR sensing properties for alcohols with different refractive indices in the range 1.33–1.41. A linear relationship was obtained between the LSPR peak wavelength and the refractive index of the surrounding medium.</P> <P>Graphic Abstract</P><P>LSPR coupling behaviour in multilayers of gold nanoparticles (Au<SUB>NPs</SUB>) and phosphorus dendrimers is discussed, where marked blue or red shifts were observed from the LSPR band upon controlled coupling between adjacent Au<SUB>NPs</SUB>. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b814116a'> </P>
Layer-by-Layer Self-Assembly of Bisdendrons: An Unprecedented Route to Multilayer Thin Films
이옥주,Valérie Maraval,Anne-Marie Caminade,정경화,King Hang Aaron Lau,신관우,Jean-Pierre Majoral,Wolfgang Knoll,김동하 한국고분자학회 2016 Macromolecular Research Vol.24 No.10
We present an unprecedented route to fabricate multilayer thin films by single component layer-by-layer molecular self-assembly. Tailored water-soluble phosphorus bisdendrons were obtained via core to core assembling of two dendrons bearing anionic groups at one end and quaternizable amino groups at the other end. Adsorption of a 1st bisdendron monolayer on a charged substrate followed by sequential quaternization/deposition of a 2nd layer leads to a stepwise growth of multilayers. By this way, homogeneous multilayer thin films were successfully constructed as confirmed by spectroscopic and microscopic analysis.