Observation of effective permittivity of water-dispersible FePt nanoparticles at microwave frequencies

被引：3

作者：

Hung, D. S. ^{[1
]}

Chiang, P. C.

Lee, C. W.

Ho, C. S.

Chien, S. H.

Yao, Y. D.

机构：

[1] Ming Chuan Univ, Dept Informat & Telecommun Engn, Taipei, Taiwan

[2] Tunghai Univ, Dept Chem Engn, Taichung, Taiwan

[3] Acad Sinica, Res Ctr Appl Sci, Taipei, Taiwan

[4] Tunghai Univ, Dept Chem Engn, Taichung, Taiwan

[5] Acad Sinica, Inst Chem, Taipei 115, Taiwan

[6] Acad Sinica, Inst Phys, Taipei 115, Taiwan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2007年 / 43卷 / 02期

关键词：

FePt; microwave; nanoparticles; permittivity;

D O I：

10.1109/TMAG.2006.888488

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：

The 2-4 nm FePt nanoparticles were synthesized by chemical reduction and dispersed into the aqueous solution after the surface modification. The dielectric spectra were measured by an open-ended transmission line technique. An open-ended coaxial cable line was designed to transmit the microwave signals into nanoparticle-filled solutions. The reflection signal revealed the dielectric properties of hydrophobic-coated FePt-filled solution was received by the transmission line. The analysis showed that the effective permittivity was around 70 and down to 50 by the external magnetic field. The flexibility of nanoparticles' permittivity revealed in this study implicates their potential applications ranged from in microwave and millimeter-wave components to biomedical drug delivery system and positron emission tomography scan.

引用

页码：879 / 881

页数：3

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