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Descripción
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| One of the major difficulties hindering the widespread application of colloidal anisotropic plasmonic nanoparticles is the limited robustness and reproducibility of multistep synthetic methods. We demonstrate herein that the reproducibility and reliability of colloidal gold nanorod (AuNR) synthesis can be greatly improved by disconnecting the symmetry breaking event from the seeded growth process. We have used a modified silver-assisted seeded growth method in the presence of the surfactant hexadecyltrimethylammonium bromide and n-decanol as a co-surfactant, to prepare small AuNRs in high yield, which were then used as seeds for the growth of high quality AuNR colloids. Whereas the use of n-decanol provides a more rigid micellar system, the growth on anisotropic seeds avoids sources of irreproducibility during the symmetry breaking step, yielding uniform AuNR colloids with narrow plasmon bands, ranging from 600 to 1250 nm, and allowing fine tuning of the final dimensions. This method provides a robust route for the preparation of highly-quality AuNR colloids with tunable morphology, size and optical response, in a reproducible and scalable manner. | |
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Internacional
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JCR del ISI
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Título de la revista
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Acs Nano |
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ISSN
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1936-0851 |
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Factor de impacto JCR
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13,709 |
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Información de impacto
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Datos JCR del año 2017 |
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Volumen
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DOI
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Número de revista
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