A wide-frequency range AC magnetometer to measure the specific absorption rate in nanoparticles for magnetic hyperthermia
A wide-frequency range AC magnetometer to measure the specific absorption rate in nanoparticles for magnetic hyperthermia
复制标题
DOI：
10.1016/j.jmmm.2013.11.021
复制
发表时间：
2014-11-01
影响因子：
2.7
通讯作者：
Sandre, O.
中科院分区：
文献类型：
--
作者：
Garaio, E.;Collantes, J. M.;Sandre, O.
磁性纳米粒子的比吸收率（SAR）的测量是确定其磁热疗潜力的关键。为了完成这项任务，量热法被广泛使用。然而，这些方法不是很准确，很难标准化。在本文中，我们提出了交流磁力测量结果进行了实验室自制的磁力计，能够获得动态磁滞回线的交流磁场频率范围从50 kHz到1 MHz和强度高达24 kAmm（-1）在这项工作中，SAR值磁赤铁矿纳米粒子分散在水中的交流磁力测量。这样得到的值进行比较与量热法测得的SAR。这两种测量，量热法和磁力测定法，是在很好的协议。因此，提出的交流磁力计是一种合适的方式来获得磁性纳米颗粒的SAR值。(C)2013爱思唯尔有限公司版权所有。
Measurement of specific absorption rate (SAR) of magnetic nanoparticles is crucial to assert their potential for magnetic hyperthermia. To perform this task, calorimetric methods are widely used. However, those methods are not very accurate and are difficult to standardize. In this paper, we present AC magnetometry results performed with a lab made magnetometer that is able to obtain dynamic hysteresis loops in the AC magnetic field frequency range from 50 kHz to 1 MHz and intensities up to 24 kA m(-1) In this work, SAR values of maghemite nanoparticles dispersed in water are measured by AC magnetometry. The so obtained values are compared with the SAR measured by calorimetric methods. Both measurements, by calorimetry and magnetometry, are in good agreement. Therefore, the presented AC magnetometer is a suitable way to obtain SAR values of magnetic nanoparticles. (C) 2013 Elsevier B.V. All rights reserved.