controloftheinterparticlespacinginsuperparamagneticironoxidenanoparticleclustersbysurfaceligandengineering

	controloftheinterparticlespacinginsuperparamagneticironoxidenanoparticleclustersbysurfaceligandengineering
	Wang Dan 1; Lin Bingbing 1; Shen Taipeng 1; Wu Jun 1; Hao Fuhua2 ; Xia Chunchao 1; Gong Qiyong 1; Tang Huiru 2; Song Bin 1; Ai Hua 1
刊名	chinesephysicsb
	2016
卷号	25 期号:7 页码:077504
ISSN号	1674-1056
英文摘要	Polymer-mediated self-assembly of superparamagnetic iron oxide (SPIO) nanoparticles allows modulation of the structure of SPIO nanocrystal cluster and their magnetic properties. In this study, dopamine-functionalized polyesters (DApolyester) were used to directly control the magnetic nanoparticle spacing and its effect on magnetic resonance relaxation properties of these clusters was investigated. Monodisperse SPIO nanocrystals with different surface coating materials (poly(e-caprolactone), poly(lactic acid)) of different molecular weights containing dopamine (DA) structure (DA-PCL2k, DA-PCL1k, DA-PLA1k)) were prepared via ligand exchange reaction, and these nanocrystals were encapsulated inside amphiphilic polymer micelles to modulate the SPIO nanocrystal interparticle spacing. Small-angle x-ray scattering (SAXS) was applied to quantify the interparticle spacing of SPIO clusters. The results demonstrated that the tailored magnetic nanoparticle clusters featured controllable interparticle spacing providing directly by the different surface coating of SPIO nanocrystals. Systematic modulation of SPIO nanocrystal interparticle spacing can regulate the saturation magnetization (Ms) and T2 relaxation of the aggregation, and lead to increased magnetic resonance (MR) relaxation properties with decreased interparticle spacing.
语种	英语
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/16439]
专题	中国科学院武汉物理与数学研究所
作者单位	1.四川大学 2.中国科学院武汉物理与数学研究所
推荐引用方式 GB/T 7714	Wang Dan,Lin Bingbing,Shen Taipeng,et al. controloftheinterparticlespacinginsuperparamagneticironoxidenanoparticleclustersbysurfaceligandengineering[J]. chinesephysicsb,2016,25(7):077504.
APA	Wang Dan.,Lin Bingbing.,Shen Taipeng.,Wu Jun.,Hao Fuhua.,...&Ai Hua.(2016).controloftheinterparticlespacinginsuperparamagneticironoxidenanoparticleclustersbysurfaceligandengineering.chinesephysicsb,25(7),077504.
MLA	Wang Dan,et al."controloftheinterparticlespacinginsuperparamagneticironoxidenanoparticleclustersbysurfaceligandengineering".chinesephysicsb 25.7(2016):077504.