Bioassisted, surface-mediated growth of inorganic nanoparticles

PMSE 182

Eugenia Kharlampieva, ekharlam@gatech.edu1, Nils Kröger2, and V. V. Tsukruk, vladimir@mse.gatech.edu1. (1) School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, (2) School of Materials Science and Engineering and School of Chemistry and Biochemistry, Georgia Institute of Technology, 331 Ferst Drive, N.W, Atlanta, GA 30332
The creation of nanoscale materials using biological templates has received much attention since it allows mimicking the growth and assembly processes found in natural materials and offers the advantage of precise control over particle shapes and sizes. In this study, we used the recombinant silaffin rSilC as a template to grow titania nanoparticles at room temperature and neutral pH. The protein was adsorbed on planar silicon wafers modified with polyelectrolyte films. rSilC deposition on the polymeric surface and formation of titania particles were characterized by in situ ATR-FTIR, AFM, EDAX, XPS and TEM. We found that the surface-mediated nucleation and growth of the titania nanoparticles is a kinetically-driven process. In addition, nanoparticle size and density were greatly influenced by protein concentration. The obtained particles were monodisperse with an average diameter of 10 nm.
 

Synthesis and Self-Assembly Approaches to Polymer-Inorganic Hybrid Nanoparticles
1:30 PM-4:30 PM, Tuesday, April 8, 2008 Hilton New Orleans Riverside -- Grand Salon 24, Oral

Division of Polymeric Materials: Science & Engineering

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008