Chemical kinetics of gold nanorod growth in aqueous CTAB solutions
The chemical kinetics of the silver-mediated growth of gold nanorods prepared by the reduction of gold precursor in aqueous cetyltrimethylammonium bromide (CTAB) solution has been systematically studied using spectroscopic monitoring and electron microscopy. The rate of monomer depletion −d[Aun+]/dt...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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American Chemical Society
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/44102 |
| _version_ | 1848756901462933504 |
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| author | Bullen, C. Zijlstra, P. Bakker, Eric Gu, M. Raston, C. |
| author_facet | Bullen, C. Zijlstra, P. Bakker, Eric Gu, M. Raston, C. |
| author_sort | Bullen, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The chemical kinetics of the silver-mediated growth of gold nanorods prepared by the reduction of gold precursor in aqueous cetyltrimethylammonium bromide (CTAB) solution has been systematically studied using spectroscopic monitoring and electron microscopy. The rate of monomer depletion −d[Aun+]/dt has a linear dependence on both [Aun+] and seed nuclei concentration at 30 °C. Particle growth is significantly retarded by hexadecyltrimethylammonium bromide (CTAB) and KBr, with the order ca. −1 for [Br–]. The rate of nanoparticle growth is dependent on the reducing ascorbate monoanion concentration and is consequently highly pH dependent around the pKa1 of ascorbic acid, while AgNO3 retards the observed kinetics for both the growth of nanorods from ca. 2 nm seed nuclei and the overgrowth of Au nanorods. |
| first_indexed | 2025-11-14T09:19:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-44102 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:19:34Z |
| publishDate | 2011 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-441022017-09-13T14:03:55Z Chemical kinetics of gold nanorod growth in aqueous CTAB solutions Bullen, C. Zijlstra, P. Bakker, Eric Gu, M. Raston, C. The chemical kinetics of the silver-mediated growth of gold nanorods prepared by the reduction of gold precursor in aqueous cetyltrimethylammonium bromide (CTAB) solution has been systematically studied using spectroscopic monitoring and electron microscopy. The rate of monomer depletion −d[Aun+]/dt has a linear dependence on both [Aun+] and seed nuclei concentration at 30 °C. Particle growth is significantly retarded by hexadecyltrimethylammonium bromide (CTAB) and KBr, with the order ca. −1 for [Br–]. The rate of nanoparticle growth is dependent on the reducing ascorbate monoanion concentration and is consequently highly pH dependent around the pKa1 of ascorbic acid, while AgNO3 retards the observed kinetics for both the growth of nanorods from ca. 2 nm seed nuclei and the overgrowth of Au nanorods. 2011 Journal Article http://hdl.handle.net/20.500.11937/44102 10.1021/cg101636r American Chemical Society restricted |
| spellingShingle | Bullen, C. Zijlstra, P. Bakker, Eric Gu, M. Raston, C. Chemical kinetics of gold nanorod growth in aqueous CTAB solutions |
| title | Chemical kinetics of gold nanorod growth in aqueous CTAB solutions |
| title_full | Chemical kinetics of gold nanorod growth in aqueous CTAB solutions |
| title_fullStr | Chemical kinetics of gold nanorod growth in aqueous CTAB solutions |
| title_full_unstemmed | Chemical kinetics of gold nanorod growth in aqueous CTAB solutions |
| title_short | Chemical kinetics of gold nanorod growth in aqueous CTAB solutions |
| title_sort | chemical kinetics of gold nanorod growth in aqueous ctab solutions |
| url | http://hdl.handle.net/20.500.11937/44102 |