A high-resolution frequency variable experimental setup for studying ferrofluids used in magnetic hyperthermia.

Autor: Mazon EE; Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad 1115, Col. Linda Vista, Ocotlán, Jalisco C.P. 47820, Mexico., Villa-Martínez E; Departamento de Física, División de Ciencias e Ingenierías Campus León, Universidad de Guanajuato, Loma de Bosque 103, Col. Lomas del Campestre, C.P. 37150 Guanajuato, Mexico., Hernández-Sámano A; Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad 1115, Col. Linda Vista, Ocotlán, Jalisco C.P. 47820, Mexico., Córdova-Fraga T; Departamento de Física, División de Ciencias e Ingenierías Campus León, Universidad de Guanajuato, Loma de Bosque 103, Col. Lomas del Campestre, C.P. 37150 Guanajuato, Mexico., Ibarra-Sánchez JJ; Departamento de Ingeniería Química, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, Noria Alta S/N, Noria Alta, 36050 Guanajuato, Gto., Mexico., Calleja HA; Centro Nacional de Investigación y Desarrollo Tecnológico, Interior Internado Palmira S/N, Palmira, 62490 Cuernavaca, Mor., Mexico., Leyva Cruz JA; Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad 1115, Col. Linda Vista, Ocotlán, Jalisco C.P. 47820, Mexico., Barrera A; Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad 1115, Col. Linda Vista, Ocotlán, Jalisco C.P. 47820, Mexico., Estrada JC; Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad 1115, Col. Linda Vista, Ocotlán, Jalisco C.P. 47820, Mexico., Paz JA; Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad 1115, Col. Linda Vista, Ocotlán, Jalisco C.P. 47820, Mexico., Quintero LH; Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad 1115, Col. Linda Vista, Ocotlán, Jalisco C.P. 47820, Mexico., Cano ME; Centro Universitario de la Ciénega, Universidad de Guadalajara, Av. Universidad 1115, Col. Linda Vista, Ocotlán, Jalisco C.P. 47820, Mexico.
Jazyk: angličtina
Zdroj: The Review of scientific instruments [Rev Sci Instrum] 2017 Aug; Vol. 88 (8), pp. 084705.
DOI: 10.1063/1.4998975
Abstrakt: A scanning system for specific absorption rate of ferrofluids with superparamagnetic nanoparticles is presented in this study. The system contains an induction heating device designed and built with a resonant inverter in order to generate magnetic field amplitudes up to 38 mT, over the frequency band 180-525 kHz. Its resonant circuit involves a variable capacitor with 1 nF of capacitance steps to easily select the desired frequency, reaching from 0.3 kHz/nF up to 5 kHz/nF of resolution. The device performance is characterized in order to compare with the theoretical predictions of frequency and amplitude, showing a good agreement with the resonant inverters theory. Additionally, the setup is tested using a synthetic iron oxide with 10 ± 1 nm diameter suspended in liquid glycerol, with concentrations at 1%. Meanwhile, the temperature rise is measured to determine the specific absorption rate and calculate the dissipated power density for each f. This device is a suitable alternative to studying ferrofluids and analyzes the dependence of the power absorption density with the magnetic field intensity and frequency.
Databáze: MEDLINE