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Bioconjugates of CdTe Nanowires and Au Nanoparticles: Plasmon−Exciton Interactions, Luminescence Enhancement, and Collective Effects
Abstract
Nanoscale superstructures made from CdTe nanowires (NWs) and metal nanoparticles (NPs) are prepared via bioconjugation reactions. Prototypical biomolecules, such as d -biotin and streptavidin pair, were utilized to connect NPs and NWs in solution. It was found that Au NPs form a dense shell around a CdTe NW. The superstructure demonstrated unusual optical effects related to the long-distance interaction of the semiconductor and noble metal nanocolloids. The NW−NP complex showed 5-fold enhancement of luminescence intensity and a blue shift of the emission peak as compared to unconjugated NW. The system was theoretically examined in a simple model of CdTe NW coaxially surrounded by an Au shell, which gives excellent agreement with experimental data. The combination of time-resolved luminescence and calculations demonstrated that increase of fluorescence intensity occurs due to stimulation of photon emission by an electromagnetic field generated around the Au NP. The process is reminiscent of SERS, although displaying smaller enhancement factors. Importantly, the luminescence enhancement should be treated as a collective response of Au−NPs, rather than a result of isolated NP−NW interactions.
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Cites
Fluidity of Bound Hydration Layers
Raviv, U., & Klein, J. (2002) · Science · doi:10.1126/science.1074481 · Cited by 721
Vo-Dinh, T. (1998) · TrAC Trends in Analytical Chemistry · doi:10.1016/s0165-9936(98)00069-7 · Cited by 498
Cited by
Plasmonic-metal nanostructures for efficient conversion of solar to chemical energy
Linic, S., Christopher, P., & Ingram, D. B. (2011) · Nature Materials · doi:10.1038/nmat3151 · Cited by 4,852
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
Surface plasmon resonance in gold nanoparticles: a review
Amendola, V., Pilot, R., Frasconi, M., Maragò, O. M., & Iatì, M. A. (2017) · Journal of Physics: Condensed Matter · doi:10.1088/1361-648x/aa60f3 · Cited by 1,905
Templated Techniques for the Synthesis and Assembly of Plasmonic Nanostructures
Jones, M. R., Osberg, K. D., Macfarlane, R. J., Langille, M. R., & Mirkin, C. A. (2011) · Chemical Reviews · doi:10.1021/cr1004452 · Cited by 1,159
Govorov, A. O., Fan, Z., Hernandez, P., Slocik, J. M., & Naik, R. R. (2010) · Nano Letters · doi:10.1021/nl100010v · Cited by 709
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Metadata
- Authors
- Lee, J., Govorov, A. O., Dulka, J., & Kotov, N. A.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-11-03
- Volume
- 4
- Issue
- 12
- Pages
- 2323-2330
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2161561003
- Cited by
- 378
- References
- 2
- FWCI
- 11.30
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
