Thermal diffusivity of ferrofluids as a function of particle size determined using the mode-mismatched dual-beam thermal lens technique

Lenart, V.M. ; Astrath, N.G.C. ; Turchiello, R.F. ; Goya, G.F. (Universidad de Zaragoza) ; Gómez, S.L.

Resumen: Ferrofluids are colloids of superparamagnetic nanoparticles that are envisaged for use in hyperthermia, which is based on nonradiative relaxation after interaction with a high-frequency magnetic field or light. For such applications, an important parameter is the thermal diffusivity. In this communication, we present an experimental study of the dependence of thermal diffusivity of ferrofluids on the size of the magnetite nanoparticles by employing the mode-mismatched thermal lens technique. The results show a huge enhancement of the thermal diffusivity by increasing the average size of the nanoparticles, while the number density of the nanoparticles is maintained as constant.

Idioma: Inglés

DOI: 10.1063/1.5017025

Año: 2018

Publicado en: Journal of Applied Physics 123, 8 (2018), 085107 [5 pp]
ISSN: 0021-8979

Factor impacto JCR: 2.328 (2018)

Categ. JCR: PHYSICS, APPLIED rank: 59 / 148 = 0.399 (2018) - Q2 - T2

Factor impacto SCIMAGO: 0.746 - Physics and Astronomy (miscellaneous) (Q2)

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)