التفاصيل البيبلوغرافية
| العنوان: |
Charge-transfer plasmons with narrow conductive molecular bridges: A quantum-classical theory. |
| المؤلفون: |
Fedorov, A. S., Krasnov, P. O., Visotin, M. A., Tomilin, F. N., Polyutov, S. P., Ågren, H. |
| المصدر: |
Journal of Chemical Physics; 12/28/2019, Vol. 151 Issue 24, p1-9, 9p, 3 Diagrams, 2 Charts, 5 Graphs |
| مصطلحات موضوعية: |
METAL nanoparticles, DENSITY functional theory, CONDUCTING polymers, GOLD nanoparticles, CHEMICAL detectors |
| مستخلص: |
We analyze a new type of plasmon system arising from small metal nanoparticles linked by narrow conductive molecular bridges. In contrast to the well-known charge-transfer plasmons, the bridge in these systems consists only of a narrow conductive molecule or polymer in which the electrons move in a ballistic mode, showing quantum effects. The plasmonic system is studied by an original hybrid quantum-classical model accounting for the quantum effects, with the main parameters obtained from first-principles density functional theory simulations. We have derived a general analytical expression for the modified frequency of the plasmons and have shown that its frequency lies in the near-infrared (IR) region and strongly depends on the conductivity of the molecule, on the nanoparticle–molecule interface, and on the size of the system. As illustrated, we explored the plasmons in a system consisting of two small gold nanoparticles linked by a conjugated polyacetylene molecule terminated by sulfur atoms. It is argued that applications of this novel type of plasmon may have wide ramifications in the areas of chemical sensing and IR deep tissue imaging. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Chemical Physics is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Find this article in full text from Scitation.