Simulations And Analysis Of Self-Assembly Of Cdte Nanoparticles Into Wires And Sheets
Zhenli Zhang, Chemical Engineering, University of Michigan, 2300 Hayward Road, 3074 Dow Building, Ann Arbor, MI 48109, Zhiyong Tang, National Center for Nanoscience and Technology, Beijing, China, Nicholas A. Kotov, Chemical Engineering, University of Michigan, 2300 Hayward, 3074 H. H. Dow Building, Ann Arbor, MI 49109 and Sharon C. Glotzer, Department of Chemical Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109-2136

Recent experiments have reported the self-assembly of TGA- and DMAET-stabilized CdTe nanoparticles (NPs) into wires and sheets, respectively, depending upon the stabilizer used. We develop a mesoscale model based on quantum mechanical calculations and perform Monte Carlo simulations of these NPs to elucidate the conditions under which these two structures will form. We show that consideration of NP shape, directional attraction, and electrostatic interactions is key to determining the anisotropy of the NP-NP interaction and final self-assembled structures.

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Self and Directed Assembly at the Nanoscale I

The Preliminary Program for 2007 Annual Meeting