Ligand Exchange Procedure for Bimetallic Magnetic Iron鈥揘ickel Nanocrystals toward Biocompatible Activities

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• 作者：Xiang Mao ; Junyoung Kwon ; Eun Kyoung Koh ; Dae Youn Hwang ; Jaebeom Lee
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：July 22, 2015
• 年：2015
• 卷：7
• 期：28
• 页码：15522-15530
• 全文大小：673K
• ISSN：1944-8252

文摘

Bimetallic magnetic iron-nickel (FeNi) nanocrystals (NCs) were synthesized through a one-pot synthetic wet chemistry method, and the morphology of the resulting NCs can be adjusted by changing the molar ratio of chemical attendees during the experimental processes. The obtained FeNi NCs can be redispersed in water medium though the phase works by using the ligand exchange procedures of cysteine (Cys), 5-aminovaleric acid (5AA), and glutathione (GSH), respectively. The synthesized NCs exhibited excellent magnetic properties with H_c (magnetic fields, 鈮?0^鈥? T) and 渭_a (initial permeability of up to 10⁵). Furthermore, linear sweep voltammetry (LSV) polarization curves revealed a low overpotential of 鈭?.47, 鈭?.44, and 0.15 V and a current of 105.7, 97.8, and 209 mA for the Cys-, 5AA-, and GSH-FeNi NCs, respectively. This indicated a relatively high catalytic activity of these NCs in the hydrogen evolution reaction (HER). The different cell lines (AGS, HepG2, MG63, NCI-H460, and SK-MEL-2) exposed to FeNi NCs for 5 days exhibited >87% viability at concentrations of up to 50 渭g mL^鈥?, which was indicative of excellent biocompatibility. The resulting FeNi NCs offer a facile synthetic route to fabricate monodispersed NCs. The biocompatibility of these NCs should also enable their application in electrocatalysis and biological applications.