NDLI: Phosphine-free synthesis of iron selenide nanocrytals

Content Provider	IEEE Xplore Digital Library
Author	He, S. Zhang, H. Liu, C. Yang, C. Zeng, H.
Copyright Year	2015
Description	Author affiliation: Phys., Univ. at Buffalo-SUNY, Buffalo, NY, USA (Zhang, H.; Zeng, H.) \|\| Phys., Capital Normal Univ., Beijing, China (He, S.; Liu, C.; Yang, C.)
Abstract	Iron chalcogenide compounds $(Fe_{x}Se_{y})$ have regained considerable interest due to the recent discoveries of interesting properties, such as superconductivity in PbO-type $FeSe_{1-x}$ and huge coercivity in monoclinic $Fe_{3}Se_{4}$ nanostructures. A hexagonal phase with the approximate composition of $Fe_{7}Se_{8}$ (H-phase) and a monoclinic phase with an approximate composition of $Fe_{3}Se_{4}$ (M-phase) . The ferrimagnetism is attributed to the ordered arrangement of Fe vacancies . Traditionally, iron selenides were prepared by elemental reaction in vacuum at high temperatures or mechanical alloying. They were also obtained by a solution method using aqueous metal salt and toxic gas $H_{2}Se.$ These processes are usually complicated and time-consuming and their products are bulk material with large grain size . Recently, facile solution-phase methods have been developed to synthesize iron selenide nanocrystals. However, these particles are still several hundred nanometer in dimension and are difficult to disperse in a solution . To synthesize small, monodisperse nanoparticles (NPs), strong coordination surfactants, such as those containing phosphine, are often used . In this work, we report a phosphine-free synthesis of monodisperse $Fe_{3}Se_{4}$ NPs with controllable sizes bellow 20 nm .
Starting Page	1
Ending Page	1
File Size	609852
Page Count	1
File Format	PDF
e-ISBN	9781479973224
DOI	10.1109/INTMAG.2015.7157346
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-11
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iron X-ray scattering Nanostructures Coercive force Compounds Superconducting magnets
Content Type	Text
Resource Type	Article

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