Theoretical Analysis of Optical Absorption Spectra of Parallel Nanowire Dimers and Dolmen Trimers
Theoretical Analysis of Optical Absorption Spectra of Parallel Nanowire Dimers and Dolmen Trimers
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平行纳米线二聚体和支石三聚体光学吸收光谱的理论分析
DOI:
10.1021/acs.jpcc.0c04419
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Aikens, Christine M.
中科院分区:
文献类型:
--
作者:
Pandeya, Pratima;Aikens, Christine M.
Plasmonic nanoparticles are well-known for their properties of electromagnetic field enhancement and surface spectroscopy enhancement. We used the plasmon hybridization method and group theory to study parallel dimers and dolmen trimers of Agn(n= 4, 6, and 10) nanoparticles. Interactions between the plasmon modes were studied with decreasing interparticle separation distances. Time-dependent density functional calculations are performed on the structures using the BP86/DZ level of theory. In dimers, the decrease of the interparticle separation blue-shifts the longitudinal peak, but the transverse peak position is not affected significantly. In trimers, a new peak is also observed as a shoulder of the longitudinal peak. When the interparticle separation reduces to 0.6 nm in dimers and trimers, a new peak emerges between the longitudinal and transverse peaks. This new peak red-shifts and increases in intensity upon further decreasing the interparticle separation. Analysis of the transition densities and symmetries for the respective peaks shows that the new peak arises from a charge transfer excitation.
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影响因子:
--
作者:
J. Vincenot;Christine M. Aikens
通讯作者:
Christine M. Aikens
DOI:
10.1021/acs.jpcc.8b05196
发表时间:
2018-10-18
期刊:
The journal of physical chemistry. C, Nanomaterials and interfaces
影响因子:
--
作者:
Alkan F;Aikens CM
通讯作者:
Aikens CM
影响因子:
4.6
作者:
Al-Sherbini, El-Sayed A. M.
通讯作者:
Al-Sherbini, El-Sayed A. M.
影响因子:
10.8
作者:
Lassiter, J. Britt;Aizpurua, Javier;Halas, Naomi J.
通讯作者:
Halas, Naomi J.
影响因子:
56.9
作者:
Nicewarner-Peña, SR;Freeman, RG;Natan, MJ
通讯作者:
Natan, MJ