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Engineering InAsxP1-x/InP/ZnSe III−V Alloyed Core/Shell Quantum Dots for the Near-Infrared
Abstract
Quantum dots with a core/shell/shell structure consisting of an alloyed core of InAs(x)P(1-x), an intermediate shell of InP, and an outer shell of ZnSe were developed. The InAs(x)P(1-x) alloyed core has a graded internal composition with increasing arsenic content from the center to the edge of the dots. This compositional gradient results from two apparent effects: (1) the faster reaction kinetics of the phosphorus precursor compared to the arsenic precursor, and (2) a post-growth arsenic-phosphorus exchange reaction that increases the arsenic content. The cores have a zinc blend structure for all compositions and show tunable emission in the near-infrared (NIR) region. A first shell of InP leads to a red-shift and an increase in quantum yield. The final shell of ZnSe serves to stabilize the dots for applications in aqueous environments, including NIR biomedical fluorescence imaging. These NIR-emitting core/shell/shell InAs(x)P(1-x)/InP/ZnSe were successfully used in a sentinel lymph node mapping experiment.
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Dabbousi, B. O., Rodriguez-Viejo, J., Mikulec, F. V., Heine, J. R., Mattoussi, H., Ober, R., Jensen, K. F., & Bawendi, M. G. (1997) · The Journal of Physical Chemistry B · doi:10.1021/jp971091y · Cited by 4,229
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Nie, S., Xing, Y., Kim, G. J., & Simons, J. W. (2007) · Annual Review of Biomedical Engineering · doi:10.1146/annurev.bioeng.9.060906.152025 · Cited by 952
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
Water-soluble quantum dots for biomedical applications
Yu, W. W., Chang, E., Drezek, R., & Colvin, V. L. (2006) · Biochemical and Biophysical Research Communications · doi:10.1016/j.bbrc.2006.07.160 · Cited by 435
Zimmer, J. P., Kim, S.-W., Ohnishi, S., Tanaka, E., Frangioni, J. V., & Bawendi, M. G. (2006) · Journal of the American Chemical Society · doi:10.1021/ja0579816 · Cited by 406
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Metadata
- Authors
- Kim, S.-W., Zimmer, J. P., Ohnishi, S., Tracy, J. B., Frangioni, J. V., & Bawendi, M. G.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-07-08
- Volume
- 127
- Issue
- 30
- Pages
- 10526-10532
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2012171370
- Cited by
- 242
- References
- 1
- FWCI
- 9.47
- Type
- journal article
- Language
- en
- Open access
- closed
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