Chemical Control of Particle Surfaces Focus of Richard

Chemical Control of Particle Surfaces Focus of Richard Partch Research Group Examples fullerene (electron relay) continuous, uniform bulk coatings crown ether (ion attractor/sensor) (chemical stabilizers) (dispersion enhancers) (hardness modifiers) (density regulators) (CMP abrasives) pharmaceutical (controlled delivery/release) Where organometallic (electroluminescence) is a covalent tether c: partchBabu – 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 c: partchBabu – Partch 4 -25 -11. ppt

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

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

Example Core-Shell Achievements - 3 4. Aerosol Core-Vapor Shell Reactions 1 µm Apparatus Core Ti. O 2 Shell Polymer Core Si. O 2 Shell Ti. O 2 c: partchBabu – Partch 4 -25 -11. ppt

Example Core-Shell Achievements - 4 5. Advanced Refractory Technology – GE – W. L. Gore - Si. C whiskers // BN for metal matrix composites Stir Temp BN modules on whiskers Reactants Suspended solid - Al 2 O 3 // Zr. O 2 Suspended coated solid BN coating on whiskers Zr. C for acid passivation of core - porous teflon membrane // Ta 2 O 5 for insulin generation when mixed with pancreatic cells c: partchBabu – Partch 4 -25 -11. ppt

Example Core-Shell Achievements - 5 6. Xerox Thermal Rollers (particles in rubbers) AℓN//BN Graphene//Polymer Ti. O 2//Ag Moisture- insensitive 7. Kodak Printing Dye Carriers for Color Fastness (coated Si. O 2) Nylon Coated Silica c: partchBabu – 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 Nanoparticles with attached receptors Oil Water 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 c: partchBabu – 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 Magnetic Cores with Conducting Coating Energy Source Metal Flakes 5 µm BN Coated Si. Cw for Metal Matrix Composites 0. 5 µm c: partchBabu – Partch 4 -25 -11. ppt