On the phonon dissipation contribution to nanoscale friction by direct contact.

Autor:	de Mello SRS; Centro de Ciências Exatas e da Tecnologia, Universidade de Caxias do Sul, Caxias do Sul-RS, 95070-560, Brazil., da Costa MEHM; Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro - RJ, 22453-900, Brazil., Menezes CM; Centro de Ciências Exatas e da Tecnologia, Universidade de Caxias do Sul, Caxias do Sul-RS, 95070-560, Brazil., Boeira CD; Centro de Ciências Exatas e da Tecnologia, Universidade de Caxias do Sul, Caxias do Sul-RS, 95070-560, Brazil., Freire FL Jr; Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro - RJ, 22453-900, Brazil., Alvarez F; Instituto de Física 'Gleb Wataghin', Universidade Estadual de Campinas, Campinas-SP, 13081-970, Brazil., Figueroa CA; Centro de Ciências Exatas e da Tecnologia, Universidade de Caxias do Sul, Caxias do Sul-RS, 95070-560, Brazil. cafiguer@ucs.br.
Jazyk:	angličtina
Zdroj:	Scientific reports [Sci Rep] 2017 Jun 12; Vol. 7 (1), pp. 3242. Date of Electronic Publication: 2017 Jun 12.
DOI:	10.1038/s41598-017-03046-8
Abstrakt:	The friction phenomenon is a ubiquitous manifestation of nature. Models considering phononic, electronic, magnetic, and electrostatic interactions are invoked to explain the fundamental forces involved in the friction phenomenon. In order to establish the incidence of the phonon prompting at the nanoscale friction by direct contact, we study a diamond spherical dome sliding on carbon thin films containing different amount of deuterium and hydrogen. The friction coefficient decreases by substituting hydrogen by deuterium atoms. This result is consistent with an energy dissipation vibration local mechanism from a disordered distribution of bond terminators.
Databáze:	MEDLINE
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