Published April 2015
| Supplemental Material
Journal Article
Open
Electrochemical Tuning of the Dielectric Function of Au Nanoparticles
Chicago
Abstract
The tunable dielectric response of Au nanoparticles under electrochemical bias can be interpreted in terms of changes in the surface charge density, surface damping, and the near-surface volume fraction of the nanoparticles that experience a modified dielectric function, as well as changes in the index of refraction of the surrounding electrolyte medium. Using experimental bias-dependent extinction measurements, we derive a potential-dependent dielectric function for Au nanoparticles that accounts for changes in the physical properties contributing to the optical extinction.
Additional Information
© 2015 American Chemical Society. Received: September 30, 2014. Publication Date (Web): March 10, 2015. The authors gratefully acknowledge support from the Department of Energy, Office of Science under Grant DE-FG02-07ER46405 (M.T.S. and H.A.A.) and for facilities of the DOE "Light-Material Interactions in Energy Conversion" Energy Frontier Research Center (DE-SC0001293). A.M.B. acknowledges support from an NSF Graduate Research Fellowship. Helpful discussions with L. Sweatlock are gratefully acknowledged.Attached Files
Supplemental Material - ph500358q_si_001.pdf
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Additional details
- Eprint ID
- 56372
- Resolver ID
- CaltechAUTHORS:20150406-095154662
- Department of Energy (DOE)
- DE-FG02-07ER46405
- Department of Energy (DOE)
- DE-SC0001293
- NSF Graduate Research Fellowship
- Created
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2015-04-06Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field