Shape transformation and self-alignment of Fe-based nanoparticles.

Autor: Hong J; School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan 430074 PR China jehong@hust.edu.; Research and Development Division, JS Nanotechnologies LLC San Jose CA 95134 USA., Luo Q; School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan 430074 PR China jehong@hust.edu., Jung D; Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology Pohang 37673 South Korea., Je SG; Center for X-ray Optics, Lawrence Berkeley National Laboratory Berkeley CA 94720 USA., Kim Y; WONIK IPS Co. Ltd. Pyeongtaek 17709 South Korea., Im MY; Center for X-ray Optics, Lawrence Berkeley National Laboratory Berkeley CA 94720 USA., Hwang CC; Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology Pohang 37673 South Korea., Khizroev S; Electrical and Computer Engineering, University of Miami Coral Gables FL 33146 USA., Chung S; Photo-Electronic Hybrids Research Center, Korea Institute of Science and Technology Seoul 02792 South Korea., You L; School of Optical and Electronic Information, Huazhong University of Science and Technology Wuhan 430074 PR China jehong@hust.edu.
Jazyk: angličtina
Zdroj: Nanoscale advances [Nanoscale Adv] 2019 May 16; Vol. 1 (7), pp. 2523-2528. Date of Electronic Publication: 2019 May 16 (Print Publication: 2019).
DOI: 10.1039/c9na00146h
Abstrakt: New types of functional material structures will emerge if the shape and properties are controlled in three-dimensional nanodevices. Possible applications of these would be nanoelectronics and medical systems. Magnetic nanoparticles (MNPs) are especially important in electronics such as magnetic storage, sensors, and spintronics. Also, in those that are used as magnetic resonance imaging contrasts, and tissue specific therapeutic agents, as well as in the labeling and sorting of cells, drug delivery, separation of biochemical products, and in other medical applications. Most of these applications require MNPs to be chemically stable, uniform in size, and controllable in terms of their magnetic properties and shape. In this paper three new functions of iron (Fe)-based nanoparticles are reported: shape transformation, oxidation prevention, and self-alignment. The shape of the Fe nanoparticles could be controlled by changing their oxidation states and properties by using a nanocarbon coating. Full field X-ray microscopy using synchrotron radiation revealed controllable magnetic properties of MNPs at the L 3 edge which depended on the oxidation states. Then, inkjet printing was successfully performed to deposit a uniform layer of MNPs by the size.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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