Charge-transfer plasmons with narrow conductive molecular bridges: A quantum-classical theory

Описание

Тип публикации: статья из журнала

Год издания: 2019

Идентификатор DOI: 10.1063/1.5131734

Аннотация: 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 eПоказать полностьюffects. 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. © 2019 Author(s).

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Издание

Журнал: Journal of Chemical Physics

Выпуск журнала: Vol. 151, Is. 24

Номера страниц: 5131734

ISSN журнала: 00219606

Издатель: American Institute of Physics Inc.

Авторы

  • Fedorov A.S. (RAS, Kirensky Inst Phys Fed Res Ctr KSC SB, Krasnoyarsk 660036, Russia; Fed Siberian Res Clin Ctr FMBA Russia, Krasnoyarsk 660037, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Krasnov P.O. (Fed Siberian Res Clin Ctr FMBA Russia, Krasnoyarsk 660037, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia; Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia)
  • Visotin M.A. (RAS, Kirensky Inst Phys Fed Res Ctr KSC SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Tomilin F.N. (RAS, Kirensky Inst Phys Fed Res Ctr KSC SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Polyutov S.P. (RAS, Kirensky Inst Phys Fed Res Ctr KSC SB, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
  • Agren H. (Fed Siberian Res Clin Ctr FMBA Russia, Krasnoyarsk 660037, Russia; Royal Inst Technol, Div Theoret Chem & Biol, SE-10044 Stockholm, SwedenArticle)

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