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STATE-FUNDED RESEARCH PROJECTS

Thirteen research projects were supported by the Centers for Advanced Technology (CAT) Program of New York State's Office of Science, Technology, and Academic Research (NYSTAR) in the 2003 - 2004 fiscal year. Project titles and principal investigators are listed below for each research area

  • Particle Synthesis and Properties
    Growth of Nanoscale Metal Powders
    -D. Rasmussen
    Nanoparticle Synthesis - Modeling
    -V. Privman
    Light-Harvesting Polymers
    -D. Shipp

  • Thin Films and Coatings
    Diamond Deposition
    - L. L. Regel
  • Particle Transport, Deposition and Removal
    Projects on Nanoparticle Transport, Aerodynamic Lens and CMP Modeling

    -G. Ahmadi
  • Chemical-Mechanical Planarization (CMP)
    CMP of Metal and Dielectric Films
    -S.V. Babu
    Pulsed Laser for Film and Post-CMP Cleaning
    -C. Cetinkaya
    Liposome Systems and Post-CMP Cleaning
    - Y. Li
    Electrochemical Impedance Spectroscopy Studies in Metal CMP
    -D. Roy

    Fundamental Issues in CMP
    -R. Subramanian
    Electroplating and Polishing
    - I. Suni

  • Supporting Technologies
    Lost Foam Casting Process
    - K. Janoyan
    Applications of AFM Techniques
    - I. Sokolov

The following projects are being funded during 2004-2005.

  • Particle Synthesis and Properties
    Enzymatic Synthesis of Polymers
    - A. Mueller
    Modeling of Synthesis of Well-Defined Nanosize Particles and Monodispersed Colloids
    -V. Privman
    Polymer-Titanium Dioxide Nanocomposites for Dye-Sensitized Solar Cells
    -D. Shipp

  • Thin Films and Coatings
    Low-Temperature and Low-Pressure Diamond Deposition
    - L. Regel
  • Particle Transport, Deposition, and Removal
    Non-Contact Technique for Particle-Surface Adhesion Force Measurements & Air-Coupled Acoustic Method for Characterization of Small Objects
    - C. Cetinkaya
    Transport, Deposition and Removal of Charged Nanoparticles & Aerodynamic Lens for Nanoparticles
    -G. Ahmadi
  • Chemical-Mechanical Planarization (CMP)
    Time Resolved Impedance Studies of Slurry-Effects and Galvanic Corrosion in CMP of Cu,Ta, and TaN
    -D. Roy
    Fundamental Issues in Chemical-Mechanical Polishing
    - R.S. Subramanian


  • Nanosystems
    Biosensing for Process Control
    -I. Suni
    Conductive Nanofiber-Nanoparticle Composites
    -S. Minko
    Study of Self-Assembled Nanoporous Glass Films on the Surfaces of Optical Fibers and Synthesis of Self-Assembled Dye Lasers

    -I. Sokolov


  • Supporting Technologies
    New Fluorinated Polymers for Ultrasound Imaging Applications & Direct Patterning on Photocurable low k Dielectric Films
    -Y. Li
    Measurement Tools for Lost Foam Casting Process
    - K. Janoyan


    CAMP's Annual Technical Meeting 2004

 

Photocatalysis and Photodeposition in Nanoparticle and Ultra-Thin Film Synthesis

CAMP Professor Yuzhuo Li uses photocatalysis and photodeposition in nanoparticle and ultra-thin film synthesis. Irradiation of semiconductor particles with light of energy greater than or equal to the band gap of the semiconductor promotes an electron from the valence band to the conduction band. The charge separation on the particle provides a unique opportunity for surface redox reactions. A reagent (S) can be easily reduced or oxidized via accepting or donating an electron. To prevent the charge recombination and facilitate the supply of electrons from the conduction band, an electron donor such as ethanol is often added into the suspension. Professor Li and his graduate students have recently conducted a series of experiments, which demonstrated the feasibility of depositing metal clusters/islands such as Ag, Au, Pt, Cu, and Pd via such a simple and clean photocatalytic method on both TiO2 and BaTiO3 particles. As soon as the metal cluster/island is formed on the particle surface, the metal island/cluster will serve as an electron collector for the conduction band electrons to flow in. The continuing supply of electrons from the conduction band keeps the growth of the metal island/cluster. The total number of islands/clusters on each core particle is directly correlated to the photon flux and metal ion concentration. The size of these islands/clusters may be controlled with these parameters as well as irradiation duration.

THIN FILMS AND COATINGS

Deposition of Diamond Films, Aluminum Alloy Solidification, and Contact Angle Measurements

With support from CAMP and companies, Professor Liya L. Regel continued her research on the deposition of diamond films ( not DLC) on a variety of substrates. Her group has been utilizing a new, simpler, less expensive method. Modification of this technique has permitted Professor Regel to deposit diamond at temperatures as low as 150 degrees C, which was widely believed to be impossible. Raman spectroscopy, the definitive technique for identifying the different forms of carbon, revealed very sharp crystalline diamond peaks both for faceted crystals and for polycrystalline layers formed at low temperature on polymers, glass and other substrates. Several invention disclosures have been submitted and two patent applications filed.

With funding from the Civilian Research and Development Foundation, Professor Regel and Clarkson Distinguished Professor William Wilcox worked with scientists from the Ioffe Physical Technical Institute in St. Petersburg, Russia to determine the influence of levitation and centrifugation on the microstructure and properties of aluminum alloys. Very interesting results have yielded 4 papers submitted for publication and several international presentations.

In addition with funding from NASA, an apparatus was developed for determining the influence of gas composition on surface tension and contact angle of high-melting materials using the sessile drop technique. Oxygen and hydrogen both appeared to lower the surface tension of molten Ga-doped InSb, while oxygen also lowered its contact angle on fused silica (quartz). Currently, experiments are underway with an improved apparatus and techniques using undoped InSb at lower oxygen partial pressures. A method was developed for deposition of boron nitride on silica, so that contact angle measurements can be performed on boron nitride.

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