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Ultrasmall Near-Infrared Ag2Se Quantum Dots with Tunable Fluorescence for in Vivo Imaging
Abstract
A strategy is presented that involes coupling Na(2)SeO(3) reduction with the binding of silver ions and alanine in a quasi-biosystem to obtain ultrasmall, near-infrared Ag(2)Se quantum dots (QDs) with tunable fluorescence at 90 °C in aqueous solution. This strategy avoids high temperatures, high pressures, and organic solvents so that water-dispersible sub-3 nm Ag(2)Se QDs can be directly obtained. The photoluminescence of the Ag(2)Se QDs was size-dependent over a wavelength range from 700 to 820 nm, corresponding to sizes from 1.5 ± 0.4 to 2.4 ± 0.5 nm, with good monodispersity. The Ag(2)Se QDs are less cytotoxic than other nanomaterials used for similar applications. Furthermore, the NIR fluorescence of the Ag(2)Se QDs could penetrate through the abdominal cavity of a living nude mouse and could be detected on its back side, demonstrating the potential applications of these less toxic NIR Ag(2)Se QDs in bioimaging.
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Cited by
New Generation Cadmium-Free Quantum Dots for Biophotonics and Nanomedicine
Xu, G., Zeng, S., Zhang, B., Swihart, M. T., Yong, K.-T., & Prasad, P. N. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.6b00290 · Cited by 587
Recent advances in near-infrared II fluorophores for multifunctional biomedical imaging
Ding, F., Zhan, Y., Lu, X., & Sun, Y. (2018) · Chemical Science · doi:10.1039/c8sc01153b · Cited by 538
Precise nanomedicine for intelligent therapy of cancer
Chen, H., Gu, Z., An, H., Chen, C., Chen, J., Cui, R., Chen, S., Chen, W., Chen, X., Chen, X., et al. (2018) · Science China Chemistry · doi:10.1007/s11426-018-9397-5 · Cited by 409
Self-citationDong, B., Li, C., Chen, G., Zhang, Y., Zhang, Y., Deng, M., & Wang, Q. (2013) · Chemistry of Materials · doi:10.1021/cm400812v · Cited by 299
Li, Y., Zhang, P., Tang, W., McHugh, K. J., Kershaw, S. V., Jiao, M., Huang, X., Kalytchuk, S., Perkinson, C. F., Yue, S., et al. (2022) · ACS Nano · doi:10.1021/acsnano.2c01153 · Cited by 98
Metadata
- Authors
- Gu, Y.-P., Cui, R., Zhang, Z.-L., Xie, Z.-X., & Pang, D.-W.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-12-14
- Volume
- 134
- Issue
- 1
- Pages
- 79-82
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2094415778
- Cited by
- 354
- References
- 0
- FWCI
- 12.24
- Type
- journal article
- Language
- en
- Open access
- closed
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- Gu, Y.-P., Cui, R., Zhang, Z.-L., Xie, Z.-X., & Pang, D.-W. (2012). Ultrasmall Near-Infrared Ag2Se Quantum Dots with Tunable Fluorescence for in Vivo Imaging. Journal of the American Chemical Society. https://doi.org/10.1021/ja2089553
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