1. c:\partch\Babu – Partch 4-25-11.ppt continuous, uniform bulk coatings (chemical stabilizers) (dispersion enhancers) (hardness modifiers) (density regulators) (CMP abrasives) 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) Where is a covalent tether

2. c:\partch\Babu – Partch 4-25-11.ppt 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. c:\partch\Babu – Partch 4-25-11.ppt Example Core-Shell Achievements - 1 Moisture Barrier Effectiveness RL days h phosphor DNA-derivatized silica nanoparticles: Encapsulated DNA/silica/phosphor complexes: Agglomerated particles: 1.Phosphors – coated for moisture stabilization - Kodak Imaging (BaBrCl: Eu 3+ // 2 wt. % polymer) Dark Field TEM 5 µm - GE Lighting (SrAl 12 O 19 : Y 2 O 3 // LaPO 4 ) - Syracuse Research Corporation Sensor TEM photo of YEO/LAPO 4

4. c:\partch\Babu – Partch 4-25-11.ppt Example Core-Shell Achievements - 2 Organometallic metal atoms (Eg. Manganese carbonyl) Organic carbon atoms heat CVD Reactor 2.Passivation (Manganese // carbon) 3.US Army Optical Limiters (Aluminum // carbon) 1) graphite 2) Aluminum Electrode screened mica substrate patterned deposits on Substrate (bichromal carbon-metal flakes)

5. c:\partch\Babu – Partch 4-25-11.ppt Example Core-Shell Achievements - 3 4.Aerosol Core-Vapor Shell Reactions 1 µm Apparatus Core TiO 2 Core SiO 2 Shell Polymer Shell TiO 2

6. c:\partch\Babu – Partch 4-25-11.ppt Example Core-Shell Achievements - 4 5.Advanced Refractory Technology – GE – W.L. Gore - SiC whiskers // BN for metal matrix composites BN coating on whiskers BN modules on whiskers - Al 2 O 3 // ZrO 2 ZrC for acid passivation of core - porous teflon membrane // Ta 2 O 5 for insulin generation when mixed with pancreatic cells

7. c:\partch\Babu – Partch 4-25-11.ppt Example Core-Shell Achievements - 5 6. Xerox Thermal Rollers (particles in rubbers) 7. Kodak Printing Dye Carriers for Color Fastness (coated SiO 2 ) Moisture- insensitive Nylon Coated Silica AℓN//BN Graphene//Polymer TiO 2 //Ag

8. c:\partch\Babu – Partch 4-25-11.ppt Example Core-Shell Achievements - 6 8.NIH, University of Florida Injectable Colloids for Overdose Remediation (local anesthetic, antidepressant, antiarrhythmic, cocaine, BPA, etc.) Microemulsion Oil Water Nanoparticles with attached receptors Templated nanoparticles, 0.1% w/v Templated nanoparticles, 0.05% w/v Non-templated (blank) nanoparticles, 0.1% w/v Cardiac Recovery In Vivo in Rats

9. c:\partch\Babu – Partch 4-25-11.ppt 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 5 µm 0. 5 µm Metal Flakes BN Coated SiC w for Metal Matrix Composites Magnetic Cores with Conducting Coating