Quantum plasmon excitations in gold-fullerene mixture films

0506052 - ÚJF 2020 RIV GB eng J - Journal Article
Lavrentiev, Vasyl - Chvostová, Dagmar - Motylenko, M. - Vacík, Jiří - Rafaja, D. - Dejneka, Alexandr
Quantum plasmon excitations in gold-fullerene mixture films.
Nanotechnology. Roč. 30, č. 36 (2019), č. článku 365001. ISSN 0957-4484. E-ISSN 1361-6528
R&D Projects: GA MŠMT LM2015056; GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : fullerene * nanocomposite * gold clusters * quantum plasmon * optical spectra
OECD category: Nuclear physics; Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Impact factor: 3.551, year: 2019
Method of publishing: Limited access
https://doi.org/10.1088/1361-6528/ab2613

Controllable access to the hybrid plasmonic nanostructures built of small metal nanoparticles and organic spacer offers a tempting set of electronic excitations, which proper handling promises valuable applications and bright fundamental prospect. Here, we report on remarkable plasmonic properties of the AuxC60 hybrid nanostructures formed through self-assembling the depositing mixture of metal and fullerene. Using optical absorption spectra, we demonstrate establishing of quantum plasmon (QP) excitations upon the controllable increase of spatial density and size of the Au clusters formed in the films. Detection of two plasmonic modes evidences the QP hybridization enabling by nm-scaled proximity of the neighboured Au clusters. Variation of the QP mode parameters with gradual decrease of the inter-cluster spacing Delta L to the sub-nanometre scale driven by the Au concentration in the film x allowed us to evidence the quantum tunnelling regime in the QP hybridization launching at Delta L approximate to 0.9 nm. The later result designates an important role of the C-60 molecules, separating the Au clusters, in design of plasmonic and transport properties of the hybrid films. The obtained results represent the self-assembled AuxC60 nanocomposites as the promising plasmonic materials with potential for application in nanoplasmonics, nanoelectronics, and nanomedicine.
Permanent Link: http://hdl.handle.net/11104/0297344