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Fabrication of Au nanowire/pichia pastoris cell composites with hexadecyltrimethylammonium bromides as a platform for SERS detection / Miao Wang in Industrial & engineering chemistry research, Vol. 51 N° 51 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16651–16659 Titre : Fabrication of Au nanowire/pichia pastoris cell composites with hexadecyltrimethylammonium bromides as a platform for SERS detection : A microorganism-mediated approach Type de document : texte imprimé Auteurs : Miao Wang, Auteur ; Tao Kong, Auteur ; Xiaolian Jing, Auteur Année de publication : 2012 Article en page(s) : pp. 16651–16659 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Composite  material Résumé : Au nanowire/Pichia pastoris cell composites were prepared using a microorganism-mediated method, where closely packed Au nanowires (AuNWs) are synthesized at high yields in the presence of hexadecyltrimethylammonium bromide (CTAB) without auxiliary seeds. The initial concentrations of ascorbic acid (AA), CTAB, and tetrachloroaurate trihydrate, as well as the amount of Pichia pastoris cells (PPCs), were optimized for the formation of AuNWs. For the formation of AuNWs, Au(III) ions were initially bound by the PPCs and then reduced by AA to produce Au nanoparticles (AuNPs) via preferential nucleation. The linear fusion of these AuNPs influenced by CTAB resulted in the formation of growing AuNWs, whereas the secondary nucleation beyond the PPCs produced small AuNPs that were subsequently consumed through Ostwald ripening during the aging of AuNWs. These AuNW/PPCs composites could be effectively used as surface-enhanced Raman scattering substrates for the detection of rhodamine 6G. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26755629 [article] Fabrication of Au nanowire/pichia pastoris cell composites with hexadecyltrimethylammonium bromides as a platform for SERS detection : A microorganism-mediated approach [texte imprimé] / Miao Wang, Auteur ; Tao Kong, Auteur ; Xiaolian Jing, Auteur . - 2012 . - pp. 16651–16659. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 51 (Décembre 2012) . - pp. 16651–16659 Mots-clés : Composite  material Résumé : Au nanowire/Pichia pastoris cell composites were prepared using a microorganism-mediated method, where closely packed Au nanowires (AuNWs) are synthesized at high yields in the presence of hexadecyltrimethylammonium bromide (CTAB) without auxiliary seeds. The initial concentrations of ascorbic acid (AA), CTAB, and tetrachloroaurate trihydrate, as well as the amount of Pichia pastoris cells (PPCs), were optimized for the formation of AuNWs. For the formation of AuNWs, Au(III) ions were initially bound by the PPCs and then reduced by AA to produce Au nanoparticles (AuNPs) via preferential nucleation. The linear fusion of these AuNPs influenced by CTAB resulted in the formation of growing AuNWs, whereas the secondary nucleation beyond the PPCs produced small AuNPs that were subsequently consumed through Ostwald ripening during the aging of AuNWs. These AuNW/PPCs composites could be effectively used as surface-enhanced Raman scattering substrates for the detection of rhodamine 6G. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26755629