2007
DOI: 10.1002/anie.200703259
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Chemical Sharpening of Gold Nanorods: The Rod‐to‐Octahedron Transition

Abstract: Changing faces: The shape of gold nanorods can be finely tuned by controlled growth under sonication in DMF in the presence of poly(vinylpyrrolidone). Reshaping involves the formation of rods with sharp tips and strongly faceted lateral faces, and ultimately leads to perfect, single‐crystal octahedrons (see images). Mechanistic considerations indicate a shape‐inducing effect of the polymer through different binding interactions for the different faces.

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Cited by 135 publications
(113 citation statements)
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“…For example, octahedral, truncated octahedral, cubo-octahedral and cubic particles (hexahedrons) were synthesized by Seo et al by conversion of cubo-octahedral particles into particles with different shapes using silver ions, which seems to be related to selective blocking of the growth along certain crystallographic facets [114] . Also, gold nanorods, synthesized in aqueous media, can be completely reshaped into perfect, single-crystalline octahedrons in a DMF -PVP solution as reported by Liz-Marz á n and coworkers [115] . Another interesting and important group of gold particles are the so-called " branched " nanoparticles or nanostars [116] .…”
Section: Physically Adsorbed Polymersmentioning
confidence: 73%
“…For example, octahedral, truncated octahedral, cubo-octahedral and cubic particles (hexahedrons) were synthesized by Seo et al by conversion of cubo-octahedral particles into particles with different shapes using silver ions, which seems to be related to selective blocking of the growth along certain crystallographic facets [114] . Also, gold nanorods, synthesized in aqueous media, can be completely reshaped into perfect, single-crystalline octahedrons in a DMF -PVP solution as reported by Liz-Marz á n and coworkers [115] . Another interesting and important group of gold particles are the so-called " branched " nanoparticles or nanostars [116] .…”
Section: Physically Adsorbed Polymersmentioning
confidence: 73%
“…[ [16][17][18][19] Specifically, Au nanorods have been transformed into various shapes via overgrowth on the entire surface [16][17][18] or the side surface of Au nanorods. [19] However, this strategy has not been widely extended to noble metals other than Au.…”
mentioning
confidence: 99%
“…[13,14] Many attempts have been made to explore Au nanorods as the starting material to construct nanocrystals with a core-shell structure. [10,[14][15][16][17][18][19] For example, the ends and the side surface of Au nanorods have been coated with other metals such as Pd, Pt, Ag, Ni, and Au to add new functions to the Au nanorods. [10,15] Besides coating, other strategies have been reported to generate Au nanocrystals with new geometric shapes by templating against Au nanorods.…”
mentioning
confidence: 99%
“…A oscilação longitudinal é bastante sensível às razões entre as dimensões das partículas; desta maneira, pequenas variações da geometria esférica podem produzir mudanças expressivas nas cores. 13,31,32 Foi possível estimar o diâmetro médio das nanopartículas de prata em cada caso. Trabalhos anteriores relatam as relações existentes entre os tamanhos das nanopartículas e os dados de largura a meia altura e comprimento de onda máximo das bandas de absorção exibidos pelos espectros eletrônicos.…”
Section: Testes De Estabilidadeunclassified