Научная статья на тему 'Laser synthesis of linear carbon: new route of molecular optics '

Laser synthesis of linear carbon: new route of molecular optics Текст научной статьи по специальности «Нанотехнологии»

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Текст научной работы на тему «Laser synthesis of linear carbon: new route of molecular optics »

LM-I-3

LASER-MATTER INTERACTION

Laser synthesis of linear carbon: new route of molecular optics

A. Kucherik1, S. Kutrovskaya12, A. Osipov1, V. Samyshkin1, A. Abramov1, A. Povolotskiy3

1 - Department of Physics and Applied Mathematics, Stoletov Vladimir State University,

600000 Gorkii street, Vladimir, Russia 2 - Skolkovo Institute of Science and Technology, 30 Bolshoy Boulevard, bld. 1, 121205 Moscow, Russia 3 - Institute of Chemistry, St. Petersburg State University,198504, Ulianovskaya str. 5, St. Petersburg, Russia

kucherik@vlsu.ru

Here we study stable elongated carbon chains synthesized by the laser ablation technique in a colloidal solution [1]. The mechanical stabilisation of carbyne is achieved due to the electron bonding of carbon chains to gold nanoparticles (NPs) [2]. When deposited on a substrate, the stabilized chains demonstrate straight parts whose lengths significantly exceed the theoretical limit for a free stable monoatomic carbon chain. The high-resolution transmission electron microscopy (HR TEM) of our samples shows straight linear carbon chains of the lengths that sometimes exceed 5 nm. The time-resolved photoluminescence (TRPL) spectra show that the radiative life-time of the observed transitions is of the order of 1 ns, that is similar to the data reported for excitons in CNTs. The exciton radiative lifetime decreases with the decrease of the length of the chain. We refer to the Su-Schrieder-Heeger model [3] to argue that the transition that dominates low temperature PL spectra is based on the edge electronic states that form the HOMO-LUMO pair in carbon chains stabilized by gold NPs.

The study was carried out using the equipment of the interregional multispecialty and interdisciplinary center for the collective usage of promising and competitive technologies in the areas of development and application in industry/ mechanical engineering of domestic achievements in the field of nanotechnology (Agreement No. 075-15-2021-692 of August 5, 2021). This work was also partially supported by the framework of the state task of VlSU № 0635-2020-0013

[1] A. Kucherik, S.M Arakelian et al Two-stage laser-induced synthesis of linear carbon chains, Quantum Electronics 46, 627 (2016).

[2] S. Kutrovskaya, I. Chestnov et al Electric field assisted alignment of monoatomic carbon chain, Scientific Reports 10(1) (2020)

[3] W. P. Su, J. R. Schrieffer, and A. J. Heeger, Solitons in polyacetylene, Phys. Rev.Lett. 42, 1698 (1979).

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