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Objectives

Nanosize Particles as Building Blocks for Uniform Colloids of Different Morphologies. TEM imaging of nanoscale morphology of a cubic NaMgF 3 particle. FESEM images of spherical polycrystalline Ag particles. Grant DMR-0509104 PI: D. Goia, co-PIs: E. Matijevi ć , V. Privman. Objectives.

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Objectives

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  1. Nanosize Particles as Building Blocks for Uniform Colloids of Different Morphologies TEM imaging of nanoscale morphology of a cubic NaMgF3 particle FESEM images of spherical polycrystalline Ag particles GrantDMR-0509104 PI: D. Goia, co-PIs: E. Matijević, V. Privman Objectives • Identify the key parameters to predictably produce monodispersed particles of desired size, shape, and internal structure for various applications. • Elucidate experimentally and theoretically the self-assembly mechanisms of monodispersed colloidal particles by aggregation of nanosize precursors. Achievements • The aggregation process of nanosize precursors was studied experimentally for several representative systems (CdS, Ag, AgPd, Au, Pd, CuO, NaMgF3), and the parameters that control the size distribution and internal structure were identified. • Theoretical modeling has been initiated to account for nanosize precursor aggregation and predict the shape and size selection of the resulting colloid particles. The calculations matched the experimental results.

  2. Nanosize Particles as Building Blocks for Uniform Colloids of Different Morphologies FESEM image of silver platelets made by aggregation of nanosize subunits Cooper rods made of nanosize subunits AgPd spheres made of nanosize subunits GrantDMR-0509104 PI: D. Goia, co-PIs: E. Matijević, V. Privman Industrial Applications Our basic-research program has enabled the development of commercial products in joint efforts with, and sponsored by: • Catalysts for fuel cells (Umicore). • Electronic materials (Nanodynamics Inc., Lockheed, Ames Goldsmith, NYSTAR). • Drug delivery (Cytimmune Inc.). • Obscurant smokes (U.S. Army). • Fluorescent particles for medical • diagnostics (Coulter). • Nanosize drugs (élan technologies). • Photolithography (Lincoln MIT Lab). • Slurries for CMP (IBM, Intel). Education and Outreach • Trained graduate, undergraduate students, and postdocs. • Courses offered in academia and industry. • National security applications (US Army). • Technologies licensed to industry.

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