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Objectives and Achievements

Nanosize Particles as Building Blocks for Uniform Colloids of Different Morphologies. Dan V. Goia, Clarkson University, DMR 0509104. Objectives and Achievements.

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Objectives and Achievements

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  1. Nanosize Particles as Building Blocks for Uniform Colloids of Different Morphologies Dan V. Goia, Clarkson University, DMR 0509104 Objectives and Achievements The long-term objective of our project has been to elucidate mechanisms of controlled colloidal particle synthesis, explain their size, shape and morphology, and extend this know-how to nano-size particle formation. We have set up a comprehensive program to study different systems, both experimentally and theoretically, utilizing the new two-stage aggregation model devised by our group. For this purpose we have selected both inorganic and organic systems involving particle dimensions from several tens of nanometers to several micrometers and various shapes (spheres, platelets, cubes, prisms, wires, etc.). Theoretical modeling has been initiated to account for nanosize precursors formation by burst nucleation and their aggregation, and predict the shape and size selection of the resulting colloid particles. These calculations have matched the experimental results. HRTEM imaging of nanoscale morphology of a cubic NaMgF3 particle. Nanoparticle size distribution modeled within the burst-nucleation approach. FESEM imaging of a cubic PbS particle.

  2. Nanosize Particles as Building Blocks for Uniform Colloids of Different Morphologies Dan V. Goia, Clarkson University, DMR 0509104 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). FESEM imaging of silver particles of different sizes (50-1000 nm). Colloidal crystalline cholesterol particles and their multilayer aggregation. Education and Outreach • Trained graduate and undergraduate students, and postdocs. • Courses offered in academia and industry. • National security applications (US Army). • Technologies licensed to industry.

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