The relevance of Brownian relaxation as power absorption mechanism in Magnetic Hyperthermia

doi:10.1038/s41598-019-40341-y

KMS > 物质科学与技术学院 > PI研究组 > Osamu Terasaki组

	The relevance of Brownian relaxation as power absorption mechanism in Magnetic Hyperthermia
	Torres, Teobaldo E.1,2; Lima Jr, Enio 3; Pilar Calatayud, M.1; Sanz, Beatriz 1; Ibarra, Alfonso 1,2; Fernandez-Pacheco, Rodrigo 1,2; Mayoral, Alvaro4 ; Marquina, Clara 5,6; Ricardo Ibarra, M.1,2,5; Goya, Gerardo F.1,5
	2019-03-08
发表期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
卷号	9
发表状态	已发表
DOI	10.1038/s41598-019-40341-y
摘要	The Linear Response Theory (LRT) is a widely accepted framework to analyze the power absorption of magnetic nanoparticles for magnetic fluid hyperthermia. Its validity is restricted to low applied fields and/or to highly anisotropic magnetic nanoparticles. Here, we present a systematic experimental analysis and numerical calculations of the specific power absorption for highly anisotropic cobalt ferrite (CoFe2O4) magnetic nanoparticles with different average sizes and in different viscous media. The predominance of Brownian relaxation as the origin of the magnetic losses in these particles is established, and the changes of the Specific Power Absorption (SPA) with the viscosity of the carrier liquid are consistent with the LRT approximation. The impact of viscosity on SPA is relevant for the design of MNPs to heat the intracellular medium during in vitro and in vivo experiments. The combined numerical and experimental analyses presented here shed light on the underlying mechanisms that make highly anisotropic MNPs unsuitable for magnetic hyperthermia.
收录类别	SCI ; SCIE
语种	英语
资助项目	Aragon Regional Government (DGA)[E-26] ; Aragon Regional Government (DGA)[E28-17R]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000460627700080
出版者	NATURE PUBLISHING GROUP
WOS关键词	NANOPARTICLES ; HYSTERESIS ; VISCOSITY ; FLUID ; CELL
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/30584
专题	物质科学与技术学院_PI研究组_Osamu Terasaki组
通讯作者	Torres, Teobaldo E.
作者单位	1.Univ Zaragoza, INA, C Mariano Esquillor S-N, Zaragoza 50018, Spain 2.Univ Zaragoza, LMA, C Mariano Esquillor S-N, Zaragoza 50018, Spain 3.Consejo Nacl Invest Cient & Tecn, Ctr Atom Bariloche, Div Resonancias Magnet, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina 4.Shanghai Tech Univ, Sch Phys Sci & Technol, 393 Middle Huaxia Rd, Shanghai 201210, Peoples R China 5.Univ Zaragoza, Fac Ciencias, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain 6.Univ Zaragoza, CSIC, ICMA, Zaragoza, Spain
推荐引用方式 GB/T 7714	Torres, Teobaldo E.,Lima Jr, Enio,Pilar Calatayud, M.,et al. The relevance of Brownian relaxation as power absorption mechanism in Magnetic Hyperthermia[J]. SCIENTIFIC REPORTS,2019,9.
APA	Torres, Teobaldo E..,Lima Jr, Enio.,Pilar Calatayud, M..,Sanz, Beatriz.,Ibarra, Alfonso.,...&Goya, Gerardo F..(2019).The relevance of Brownian relaxation as power absorption mechanism in Magnetic Hyperthermia.SCIENTIFIC REPORTS,9.
MLA	Torres, Teobaldo E.,et al."The relevance of Brownian relaxation as power absorption mechanism in Magnetic Hyperthermia".SCIENTIFIC REPORTS 9(2019).