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Extinction Coefficient of Gold Nanostars
Open accessAbstract
Gold nanostars (NStars) are highly attractive for biological applications due to their surface chemistry, facile synthesis, and optical properties. Here, we synthesize NStars in HEPES buffer at different HEPES/Au ratios, producing NStars of different sizes and shapes and therefore varying optical properties. We measure the extinction coefficient of the synthesized NStars at their maximum surface plasmon resonances (SPRs), which range from 5.7 × 10 8 to 26.8 × 10 8 M –1 cm –1 . Measured values correlate with those obtained from theoretical models of the NStars using the discrete dipole approximation (DDA), which we use to simulate the extinction spectra of the nanostars. Finally, because NStars are typically used in biological applications, we conjugate DNA and antibodies to the NStars and calculate the footprint of the bound biomolecules.
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Cites
Optical Constants of the Noble Metals
Johnson, P. B., & Christy, R. W. (1972) · Physical Review B · doi:10.1103/physrevb.6.4370 · Cited by 20,094
Tuning Size and Sensing Properties in Colloidal Gold Nanostars
Barbosa, S., Agrawal, A., Rodríguez-Lorenzo, L., Pastoriza-Santos, I., Alvarez-Puebla, R. A., Kornowski, A., Weller, H., & Liz-Marzán, L. M. (2010) · Langmuir · doi:10.1021/la102559e · Cited by 522
Cited by
What Does Nanoparticle Stability Mean?
Phan, H. T., & Haes, A. J. (2019) · The Journal of Physical Chemistry C · doi:10.1021/acs.jpcc.9b00913 · Cited by 473
Metadata
- Authors
- de Puig, H., Tam, J. O., Yen, C.-W., Gehrke, L., & Hamad-Schifferli, K.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-07-15
- Volume
- 119
- Issue
- 30
- Pages
- 17408-17415
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2516895384
- Cited by
- 161
- References
- 2
- FWCI
- 3.58
- Type
- journal article
- Language
- en
- Open access
- green
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- de Puig, H., Tam, J. O., Yen, C.-W., Gehrke, L., & Hamad-Schifferli, K. (2015). Extinction Coefficient of Gold Nanostars. The Journal of Physical Chemistry C. https://doi.org/10.1021/acs.jpcc.5b03624
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