Synthesis and characterization of magnetic Mn1-xZnxFe2O4 and core-shell nanoparticles

INOR 636

Xin Wang1, Lingyan Wang, lwang2@binghamton.edu2, Hye-Young Park2, Peter N. Njoki, pnjoki1@binghamton.edu2, Stephanie Lim, stephanie.lim@binghamton.edu2, and Chuan-Jian Zhong, cjzhong@binghamton.edu2. (1) Department of Chemistry, State University of New York at Binghamton & Hebei University of Technology, Binghamton, NY 13902, (2) Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902
The ability to synthesize magnetic nanoparticles with controlled size and surface properties is important for exploring the nanoscale magnetic properties for chemical and biological applications. This paper describes findings of an investigation of the synthesis and characterization of Mn1-xZnxFe2O4 and core (Mn1-xZnxFe2O4)-shell (Au) nanoparticles. Mn1-xZnxFe2O4 nanoparticles of selected sizes were first synthesized as seeding materials for the reduction of gold precursors to produce gold-coated Mn1-xZnxFe2O4 nanoparticles (Mn1-xZnxFe2O4@Au). The results form the characterization of the particle size, surface plasmon resonance optical band, core-shell composition, surface reactivity, and magnetic properties have demonstrated size controllability and the viability of the formation of core-shell nanostructure. The gold-based surface protein-binding reactivity and the Mn1-xZnxFe2O based magnetic separation capability served as a proof-of-concept demonstration of the application of the nanomaterials in bio-separation. Implications of the findings to the design of core-shell nanocomposites for biological applications are also briefly discussed.
 

Nanoscience: Synthesis and Characterization
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Inorganic Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007