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Dependence of the Gold Nanorod Aspect Ratio on the Nature of the Directing Surfactant in Aqueous Solution
Abstract
A three-step seed-mediated growth method was used to make gold nanoparticles. Different surfactants, alkyltrimethylammonium bromides (C n TAB, n = 10, 12, 14, 16, and 18) and cetylpyridinium chloride (C 16 PC), were chosen as stabilizers. In general, it was found that as the length of the surfactant chain increased, the resulting gold nanoparticles' aspect ratio increased: the aspect ratio was 1 (for C 10 TAB), 5 ± 2 (C 12 TAB), 17 ± 3 (C 14 TAB), and 23 ± 4 (C 16 TAB). The plasmon absorption maxima for the gold nanoparticles varied as a function of the shape, from 520 nm (spheres) to beyond 2000 nm (high aspect ratio nanorods). We propose that the surfactant binds as a bilayer to the growing nanoparticle and assists in nanoparticle elongation via a “zipping” mechanism.
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Cited by
Shape‐Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics?
Xia, Y., Xiong, Y., Lim, B., & Skrabalak, S. E. (2009) · Angewandte Chemie International Edition · doi:10.1002/anie.200802248 · Cited by 5,702
Colloidal Gold and Silver Triangular Nanoprisms
Millstone, J. E., Hurst, S. J., Métraux, G. S., Cutler, J. I., & Mirkin, C. A. (2009) · Small · doi:10.1002/smll.200801480 · Cited by 895
Morphological Control of Catalytically Active Platinum Nanocrystals
Lee, H., Habas, S. E., Kweskin, S., Butcher, D., Somorjai, G. A., & Yang, P. (2006) · Angewandte Chemie International Edition · doi:10.1002/anie.200603068 · Cited by 659
A “Tips and Tricks” Practical Guide to the Synthesis of Gold Nanorods
Scarabelli, L., Sánchez-Iglesias, A., Pérez-Juste, J., & Liz-Marzán, L. M. (2015) · The Journal of Physical Chemistry Letters · doi:10.1021/acs.jpclett.5b02123 · Cited by 574
Thermodynamics versus Kinetics in Nanosynthesis
Wang, Y., He, J., Liu, C., Chong, W. H., & Chen, H. (2015) · Angewandte Chemie International Edition · doi:10.1002/anie.201402986 · Cited by 497
Metadata
- Authors
- Gao, J., Bender, C. M., & Murphy, C. J.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2003-09-20
- Volume
- 19
- Issue
- 21
- Pages
- 9065-9070
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W2069873753
- Cited by
- 615
- References
- 0
- FWCI
- 15.10
- Type
- journal article
- Language
- en
- Open access
- closed
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- Gao, J., Bender, C. M., & Murphy, C. J. (2003). Dependence of the Gold Nanorod Aspect Ratio on the Nature of the Directing Surfactant in Aqueous Solution. Langmuir. https://doi.org/10.1021/la034919i
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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