continuous, uniform bulk coatings (chemical stabilizers) (dispersion enhancers)

1. Chemical Control of Particle Surfaces Focus of Richard Partch Research Group Examples fullerene (electron relay) crown ether (ion attractor/sensor) pharmaceutical (controlled delivery/release) organometallic (electroluminescence) continuous, uniform bulk coatings (chemical stabilizers) (dispersion enhancers) (hardness modifiers) (density regulators) (CMP abrasives) Where is a covalent tether

2. Surface Modification Method Physical Processes Non-Solvent Addition → Solute Shell Adsorption Core-Shell Zeta Potential Differences Physical Vapor Deposition of Shell on Core Chemical Processes Aerosol Core – Vapor Shell Reactions In-Situ Shell Synthesis in Core Dispersions Chemical Vapor Deposition

3. Example Core-Shell Achievements - 1 • Phosphors – coated for moisture stabilization • - Kodak Imaging (BaBrCl: Eu3+ // 2 wt. % polymer) • Dark Field TEM • 5 µm • - GE Lighting (SrAl12O19 : Y2O3 // LaPO4) • - Syracuse Research Corporation Sensor Moisture Barrier Effectiveness RL hn days TEM photo of YEO/LAPO4 phosphor DNA-derivatized silica nanoparticles: Agglomerated particles: Encapsulated DNA/silica/phosphor complexes:

4. Example Core-Shell Achievements - 2 2. Passivation (Manganese // carbon) 3. US Army Optical Limiters (Aluminum // carbon) CVD Reactor heat patterned deposits on Substrate (bichromal carbon-metal flakes) Organometallic metal atoms (Eg. Manganese carbonyl) Organic carbon atoms heat Electrode 1) graphite 2) Aluminum screened mica substrate

5. Example Core-Shell Achievements - 3 4. Aerosol Core-Vapor Shell Reactions 1 µm Apparatus Core TiO2 Core SiO2 Shell Polymer Shell TiO2

6. Example Core-Shell Achievements - 4 • Advanced Refractory Technology – GE – W.L. Gore • - SiC whiskers // BN for metal matrix composites BN modules on whiskers Stir Temp Reactants Suspended coated solid BN coating on whiskers Suspended solid - Al2O3 // ZrO2 ZrC for acid passivation of core - porous teflon membrane // Ta2O5 for insulin generation when mixed with pancreatic cells

7. Example Core-Shell Achievements - 5 • 6. Xerox Thermal Rollers (particles in rubbers) • 7. Kodak Printing Dye Carriers for Color Fastness (coated SiO2) AℓN//BN Graphene//Polymer TiO2//Ag Moisture- insensitive Nylon Coated Silica

8. Oil Water Example Core-Shell Achievements - 6 • NIH, University of Florida • Injectable Colloids for Overdose Remediation • (local anesthetic, antidepressant, antiarrhythmic, cocaine, BPA, etc.) Microemulsion Nanoparticles with attached receptors Cardiac Recovery In Vivo in Rats Templated nanoparticles, 0.1%w/v Templated nanoparticles, 0.05% w/v Non-templated (blank) nanoparticles, 0.1% w/v

9. Proposed Turbine Radar Abatement Coating • Problem: Wind Turbines create doppler effects interferring with air traffic control, defense security and weather observation. • Solutions: • A: Software to identify and cancel turbine doppler • (Raytheon Canada commitment ~ 2009) • B: Material development to reduce turbine RCS. • (Partch-Visser-CAMP Invention Disclosure ~2009) • CAMP expertise in particle-composite technology • Particle composition, size, shape expertise Energy Source Magnetic Cores with Conducting Coating Metal Flakes 0. 5 µm 5 µm BN Coated SiCw for Metal Matrix Composites