Fabrication and Photocurrent Generation of Multilayer Assemblies Consisting of Silver-nanoparticles, Polydiacetylene, and Polyions

The fabrication of silver nanoparticle and polydiacetylene nanocrystal multilayer assemblies was successful on indium--tin-oxide transparent electrodes by repeating electrostatic layer-by-layer deposition. Adsorbed amount of silver nanoparticles and polydiacetylene nanocrystals was confirmed by visi...

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Published inJapanese Journal of Applied Physics Vol. 50; no. 4; pp. 04DH15 - 04DH15-4
Main Authors Akiyama, Tsuyoshi, Masuhara, Akito, Matsuda, Yoshihisa, Arakawa, Taichi, Munaoka, Takatoshi, Onodera, Tsunenobu, Oikawa, Hidetoshi, Yamada, Sunao
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.04.2011
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Summary:The fabrication of silver nanoparticle and polydiacetylene nanocrystal multilayer assemblies was successful on indium--tin-oxide transparent electrodes by repeating electrostatic layer-by-layer deposition. Adsorbed amount of silver nanoparticles and polydiacetylene nanocrystals was confirmed by visible absorption spectroscopy. The surface conditions and morphologies of the assemblies were investigated by scanning electron microscopy. In the presence of a sacrificial reagent, these multilayer assemblies generated a stable photocurrent. It has become apparent that polydiacetylene nanocrystals are not also photoexciting material in the present system, but also act as an electron relay or transport material. Therefore, photocurrent generation is assisted under the co-existence of polydiacetylene nanocrystals in the assemblies.
Bibliography:Schematic illustration of multilayer assemblies, composed of Ag NPs and poly(DCHD) NCs, prepared by LbL technique. UV--visible absorption spectra of ITO/[Ag NP/poly(DCHD) NC] 3 (solid line), ITO/[poly(DCHD) NC] 3 (dotted line), and ITO/(Ag NP) 3 (broken line). SEM images of (a) ITO/[Ag NP/poly(DCHD) NC] 3 , (b) ITO/[poly(DCHD) NC] 3 , and (c) ITO/(Ag NP) 3 . IPCE performances of ITO/[Ag NP/poly(DCHD) NC] 3 (closed circles), ITO/[poly(DCHD) NC] 3 (open squares), and ITO/(Ag NP) 3 (crosses), at $E = 0$ V vs Ag/AgCl (sat. KCl aq.). Schematic diagram of photocurrent generation.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.50.04DH15