Facile Fabrication and Magnetic Properties of a One-Dimensional Magnetite Peapod in a Lipid Nanotube

被引：10

作者：

Han, Youn-Gyu ^{[1
]}

Aoyagi, Masaru ^{[1
]}

Asakawa, Masumi ^{[1
]}

Shimizu, Toshimi ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nanotube Res Ctr NTRC, Ibaraki 3058565, Japan

来源：

ACS APPLIED MATERIALS & INTERFACES | 2012年 / 4卷 / 05期

关键词：

1D nanostructure; magnetic nanotube; lipid nanotube; magnetite; peapod; nanowire; CARBON NANOTUBES; CONTROLLED-RELEASE; VERWEY TRANSITION; HOLLOW CYLINDERS; NANOWIRES; NANOPARTICLES; MICROTUBULES; ENCAPSULATION; NANOCRYSTALS; PERFORMANCE;

D O I：

10.1021/am300122f

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Magnetite nanoclusters (MNCs) were aligned one-dimensionally in the hollow cavity of a lipid nanotube (LNT) as a peapod using a simple mixing method in an aqueous solution. The electrostatic interaction of the two materials was considerable enough to allow the preparation of a densely packed MNC-LNT peapod composite. The composite was formed at a pH 5.4-6.8, i.e., near the isoelectric point of the MNCs. At a pH 5.4-6.8, there was neither a strong attractive nor repulsive electrostatic interaction between the surface of the MNC and the LNT. The MNCs-capped LNT composites were formed at basic conditions (above a pH 7.8) in which the MNCs and the LNT pushed each other because of their opposite surface charges. The magnetic property measurement revealed that the ID aligned MNCs in. the peapod structure had a much higher coercivity (10.6 Oe) than the bulk randomized MNCs (5.8 Oe).

引用

页码：2439 / 2444

页数：6

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