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Open Access Nano Express

One-Pot Green Synthesis and Bioapplication ofl-Arginine-Capped Superparamagnetic Fe3O4 Nanoparticles

Yongchao Lai1, Weiwei Yin1, Jinting Liu1, Rimo Xi12 and Jinhua Zhan1*

Author Affiliations

1 Key Laboratory for Colloid & Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, 250100, Jinan, People’s Republic of China

2 College of Pharmaceutical Sciences, Nankai University, 300071, Tianjin, People’s Republic of China

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Nanoscale Research Letters 2009, 5:302-307  doi:10.1007/s11671-009-9480-x

Published: 13 November 2009

Abstract

Water-solubleL-arginine-capped Fe3O4 nanoparticles were synthesized using a one-pot and green method. Nontoxic, renewable and inexpensive reagents including FeCl3,L-arginine, glycerol and water were chosen as raw materials. Fe3O4 nanoparticles show different dispersive states in acidic and alkaline solutions for the two distinct forms of surface bindingL-arginine. Powder X-ray diffraction and X-ray photoelectron spectroscopy were used to identify the structure of Fe3O4 nanocrystals. The products behave like superparamagnetism at room temperature with saturation magnetization of 49.9 emu g−1 and negligible remanence or coercivity. In the presence of 1-ethyl-3-(dimethylaminopropyl) carbodiimide hydrochloride, the anti-chloramphenicol monoclonal antibodies were connected to theL-arginine-capped magnetite nanoparticles. The as-prepared conjugates could be used in immunomagnetic assay.

(See supplementary material 1)

Electronic supplementary material. The online version of this article (doi:10.1007/s11671-009-9480-x) contains supplementary material, which is available to authorized users.

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Keywords:
Magnetite; Superparamagnetic; Solvothermal; Amino acid; Nanocrystals