Magneto-optical Properties of Iron Oxide Nanoclusters

被引:0
|
作者
Kostopoulou, Athanasia [1 ,2 ]
Tsiaoussis, Ioannis [3 ]
Lappas, Alexandros [1 ]
机构
[1] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Iraklion 71110, Greece
[2] Univ Crete, Dept Chem, GR-71003 Iraklion, Greece
[3] Aristotle Univ Thessaloniki, Dept Phys, Solid State Phys Sect, GR-54124 Thessaloniki, Greece
关键词
magnetic nanoclusters; photonic crystal; iron oxide; nanoparticles; secondary structures;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We have developed a modified synthetic protocol for the growth of monodispersed, superparamagnetic, flower-like colloidal nanoclusters (CNCs) with 40-120 nm average diameters. Importantly, these are consisted of smaller iron oxide nanocrystals, also with adjustable size (12.2-7.7 nm). We show that their optical properties can be tuned by applying an external magnetic field. Spectrophotometric measurements under these conditions reveal a diffuse reflectance maximum in the visible range, which is related to the CNCs assembly in ordered structures. The increasing field strength leads to a blue shift in the spectral weight when the size of the CNCs is above a critical diameter. The size-dependent characteristics of the CNCs determine their magneto-optical behavior and their potential in photonic crystal based technologies.
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页码:26 / +
页数:2
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