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Characterization of silica-coated silver nanoparticles prepared by a reverse micelle and hydrolysis–condensation process / Nobuhiro Hagura in Chemical engineering journal, Vol. 156 N° 1 (Janvier 2010) 

Public ISBD [article]  in Chemical engineering journal > Vol. 156 N° 1 (Janvier 2010) . - pp. 200-205 Titre : Characterization of silica-coated silver nanoparticles prepared by a reverse micelle and hydrolysis–condensation process Type de document : texte imprimé Auteurs : Nobuhiro Hagura, Auteur ; W. Widiyastuti, Auteur ; Ferry Iskandar, Auteur Année de publication : 2010 Article en page(s) : pp. 200-205 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Silica  coating  Microemulsion  Hydrolysis  reaction  rate  Surface  plasmon  resonance  (SPR) Index. décimale : 660 Résumé : Described herein is the synthesis of individually silica-coated silver nanoparticles using a reverse micelle method followed by hydrolysis and condensation of tetraethoxysilane (TEOS). The size of a silica-coated silver nanoparticle can be controlled by changing the reaction time and the concentration of TEOS. By maintaining the size of a silver nanoparticle as a core particle at around 7 nm, the size of a silica-coated silver nanoparticle increased from 13 to 28 nm as the reaction time increased from 1 to 9 h due to an increase in silica thickness. The size of silica-coated silver nanoparticles also increased from 15 to 22 nm as the TEOS concentration increased from 7.8 to 40 mM. The size of a silica-coated silver nanoparticle can be accurately predicted using the rate of the hydrolysis reaction for TEOS. Neither the dispersion nor the film of silica-coated silver nanoparticles exhibited any peak shifting during surface plasmon resonance (SPR) at around 410 nm, whereas, without silica coating, the SPR peak of Ag film shifted to 466 nm. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4XFY0NY-2&_user=6 [...] [article] Characterization of silica-coated silver nanoparticles prepared by a reverse micelle and hydrolysis–condensation process [texte imprimé] / Nobuhiro Hagura, Auteur ; W. Widiyastuti, Auteur ; Ferry Iskandar, Auteur . - 2010 . - pp. 200-205. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 156 N° 1 (Janvier 2010) . - pp. 200-205 Mots-clés : Silica  coating  Microemulsion  Hydrolysis  reaction  rate  Surface  plasmon  resonance  (SPR) Index. décimale : 660 Résumé : Described herein is the synthesis of individually silica-coated silver nanoparticles using a reverse micelle method followed by hydrolysis and condensation of tetraethoxysilane (TEOS). The size of a silica-coated silver nanoparticle can be controlled by changing the reaction time and the concentration of TEOS. By maintaining the size of a silver nanoparticle as a core particle at around 7 nm, the size of a silica-coated silver nanoparticle increased from 13 to 28 nm as the reaction time increased from 1 to 9 h due to an increase in silica thickness. The size of silica-coated silver nanoparticles also increased from 15 to 22 nm as the TEOS concentration increased from 7.8 to 40 mM. The size of a silica-coated silver nanoparticle can be accurately predicted using the rate of the hydrolysis reaction for TEOS. Neither the dispersion nor the film of silica-coated silver nanoparticles exhibited any peak shifting during surface plasmon resonance (SPR) at around 410 nm, whereas, without silica coating, the SPR peak of Ag film shifted to 466 nm. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4XFY0NY-2&_user=6 [...]