Towards dielectric relaxation at a single molecule scale

0555985 - ÚOCHB 2023 RIV GB eng J - Článek v odborném periodiku
Stetsovych, V. - Feigl, S. - Vranik, R. - Wit, B. - Rauls, E. - Nejedlý, Jindřich - Šámal, Michal - Starý, Ivo - Muellegger, S.
Towards dielectric relaxation at a single molecule scale.
Scientific Reports. Roč. 12, č. 1 (2022), č. článku 2865. ISSN 2045-2322. E-ISSN 2045-2322
Grant CEP: GA ČR(CZ) GA18-20433S
Institucionální podpora: RVO:61388963
Klíčová slova: atoms * liquids
Obor OECD: Physical chemistry
Impakt faktor: 4.6, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1038/s41598-022-06684-9

Dielectric relaxation lies at the heart of well-established techniques of dielectric spectroscopy essential to diverse fields of research and technology. We report an experimental route for increasing the sensitivity of dielectric spectroscopy ultimately towards the scale of a single molecule. We use the method of radio frequency scanning tunneling microscopy to excite a single molecule junction based on a polar substituted helicene molecule by an electric field oscillating at 2-5 GHz. We detect the dielectric relaxation of the single molecule junction indirectly via its effect of power dissipation, which causes lateral displacement. From our data we determine a corresponding relaxation time of about 300 ps-consistent with literature values of similar helicene derivatives obtained by conventional methods of dielectric spectroscopy.
Trvalý link: http://hdl.handle.net/11104/0330899