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Fine-Tuning the Shape of Gold Nanorods
Abstract
Gold nanorods prepared by a seed-mediated growth approach use ∼4-nm gold nanospheres as the seeds and subsequent reduction of metal salt with a weak reducing agent (ascorbic acid) in the presence of a directing surfactant to produce nanorods. If insufficient ascorbic acid is added in the growth step, then metal salt remains. Additional input of ascorbic acid preferentially deposits more metal at the ends of the nanorods, to yield “dogbone”-like structures. Surprisingly, heat treatment of the unpurified gold nanorods (prepared with an insufficient amount of ascorbic acid) yielded fatter gold nanorods; the oxidation product of ascorbic acid appears to act as a reductant at higher temperature. These modified shapes of the gold nanorods directly influence their optical properties.
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Citations
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
Gold Nanorods: From Synthesis and Properties to Biological and Biomedical Applications
Huang, X., Neretina, S., & El‐Sayed, M. A. (2009) · Advanced Materials · doi:10.1002/adma.200802789 · Cited by 1,921
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
Self-citationA General Strategy for Synthesizing FePt Nanowires and Nanorods
Wang, C., Hou, Y., Kim, J., & Sun, S. (2007) · Angewandte Chemie International Edition · doi:10.1002/anie.200702001 · Cited by 314
Remote Optical Switch for Localized and Selective Control of Gene Interference
Lee, S. E., Liu, G. L., Kim, F., & Lee, L. P. (2009) · Nano Letters · doi:10.1021/nl802689k · Cited by 224
Metadata
- Authors
- Gou, L., & Murphy, C. J.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-06-09
- Volume
- 17
- Issue
- 14
- Pages
- 3668-3672
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2062504376
- Cited by
- 497
- References
- 0
- FWCI
- 15.69
- Type
- journal article
- Language
- en
- Open access
- closed
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