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Surfactant (Bi)Layers on Gold Nanorods
Abstract
Gold nanorods in aqueous solution are generally surrounded by surfactants or capping agents. This is crucial for anisotropic growth during synthesis and for their final stability in solution. When CTAB is used, a bilayer has been evidenced from analytical methods even though no direct morphological characterization of the precise thickness and compactness has been reported. The type of surfactant layer is also relevant to understand the marked difference in further self-assembling properties of gold nanorods as experienced using 16-EO(1)-16 gemini surfactant instead of CTAB. To obtain a direct measure of the thickness of the surfactant layer on gold nanorods synthesized by the seeded growth method, we coupled TEM, SAXS, and SANS experiments for the two different cases, CTAB and gemini 16-EO(1)-16. Despite the strong residual signal from micelles in excess, it can be concluded that the thickness is imposed by the chain length of the surfactant and corresponds to a bilayer with partial interdigitation.
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Cited by
The Quest for Shape Control: A History of Gold Nanorod Synthesis
Lohse, S. E., & Murphy, C. J. (2013) · Chemistry of Materials · doi:10.1021/cm303708p · Cited by 649
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
Self-citationFemtosecond laser reshaping yields gold nanorods with ultranarrow surface plasmon resonances
González-Rubio, G., Díaz-Núñez, P., Rivera, A., Prada, A., Tardajos, G., González-Izquierdo, J., Bañares, L., Llombart, P., Macdowell, L. G., Alcolea Palafox, M., et al. (2017) · Science · doi:10.1126/science.aan8478 · Cited by 300
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Metadata
- Authors
- Gómez-Graña, S., Hubert, F., Testard, F., Guerrero-Martínez, A., Grillo, I., Liz-Marzán, L. M., & Spalla, O.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-12-14
- Volume
- 28
- Issue
- 2
- Pages
- 1453-1459
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W2332684737
- Cited by
- 214
- References
- 0
- FWCI
- 4.92
- Type
- journal article
- Language
- en
- Open access
- closed
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