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Diffusional nucleation of nanocrystals and their selfassembly into uniform colloids

V. PRIVMAN1,*

Affiliation

  1. Department of Physics, and Center for Advanced Materials Processing, Clarkson University, Potsdam, NY 13699, USA

Abstract

We review theoretical explanation of mechanisms of control of uniformity in growth of nanosize particles and colloids. The nanoparticles are synthesized as nanocrystals, by burst nucleation from solution. The colloids are self-assembled by aggregation of these nanocrystals. The two kinetic processes are coupled, and both are driven by diffusional transport. The interrelation of the two processes allows for formation of narrow-size-distribution colloid dispersions which are of importance in many applications. We review a mathematical model of cluster growth by capture of diffusing “singlets.” Burst nucleation of nanoparticles in solution is then analyzed. Finally, we couple it to the secondary process of aggregation of nanoparticles to form colloids. We address aspects of modeling of particle size distribution, as well as other properties..

Keywords

Colloid partlcies, Nanocrystals, Nanoparticles, Burst nucleation, Aggregation, Diffusional transport.

Submitted at: Sept. 1, 2008
Accepted at: Nov. 11, 2008

Citation

V. PRIVMAN, Diffusional nucleation of nanocrystals and their selfassembly into uniform colloids, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 11, pp. 2827-2839 (2008)