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Photovoltage Mechanism for Room Light Conversion of Citrate Stabilized Silver Nanocrystal Seeds to Large Nanoprisms
Abstract
We investigate the photoconversion of aqueous 8 nm Ag nanocrystal seeds into 70 nm single crystal plate nanoprisms. The process relies on the excitation of Ag surface plasmons. The process requires dioxygen, and the transformation rate is first-order in seed concentration. Although citrate is necessary for the conversion, and is consumed, the transformation rate is independent of citrate concentration. We propose a mechanism that accounts for these features by coupling the oxidative etching of the seed and the subsequent photoreduction of aqueous Ag(+). The reduced Ag deposits onto a Ag prism of specific size that has a cathodic photovoltage resulting from plasmon "hot hole" citrate photo-oxidation. This photovoltage mechanism also explains recent experimental results involving single and dual wavelength irradiation and the core/shell synthesis of Ag layers on Au seeds.
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Citations
Cited by
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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
Photochemical Reactivity of Graphene
Liu, H., Ryu, S., Chen, Z., Steigerwald, M. L., Nuckolls, C., & Brus, L. E. (2009) · Journal of the American Chemical Society · doi:10.1021/ja9043906 · Cited by 371
Self-citationShiridokht, F., Dadashi, H., Vandghanooni, S., Eskandani, M., & Farajollahi, A. (2025) · Colloids and Surfaces B: Biointerfaces · doi:10.1016/j.colsurfb.2024.114220 · Cited by 30
Scardaci, V., Pulvirenti, M., Condorelli, M., & Compagnini, G. (2020) · Journal of Materials Chemistry C · doi:10.1039/d0tc00367k · Cited by 14
Metadata
- Authors
- Wu, X., Redmond, P. L., Liu, H., Chen, Y., Steigerwald, M., & Brus, L.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-06-26
- Volume
- 130
- Issue
- 29
- Pages
- 9500-9506
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2092539730
- Cited by
- 262
- References
- 0
- FWCI
- 5.83
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Wu, X., Redmond, P. L., Liu, H., Chen, Y., Steigerwald, M., & Brus, L. (2008). Photovoltage Mechanism for Room Light Conversion of Citrate Stabilized Silver Nanocrystal Seeds to Large Nanoprisms. Journal of the American Chemical Society. https://doi.org/10.1021/ja8018669
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