Surface Modification and Diverse Applications of Particle Syntheses
The several projects being investigated by Clarkson students mentored by Professor Partch are :
1) chemical precipitation of single and mixed dopants onto metal oxide nanoparticles for microelectronic applications;
2) modification of abrasive solids with polymers for use in CMP slurries. A patent was filed in 2002 on successful completion of some aspects of this work;
3) preparation of injectable molecular and particulate species for selective in vivo removal of overdosed chemical therapeutics and toxins. This biomedical related research is being carried out in collaboration with medical and scientific personnel at the University of Florida. An example of successful application of fundamental chemical principles to achieving the goal is that toxin receptors attached to carrier silica nanoparticles exhibit over 95% efficiency of removal of cocaine from blood in only 2 minutes. NIH has funded $1.5M for further investigations over the next few years;
4) deposition of functional polymers and self assembly of nanoparticles onto solids for components to improve the drying time and dye stability of imaging inks;
5) passivation of tantalum particles for microelectronic components;
6) evaluation of laser-induced methods for reducing the size of aggregated particles in liquid dispersion;
7) use of photodecarboxylation as a method to control the volume shrinkage of filled resins when undergoing curing; and
8) synthesis of high aspect ratio metal and metal coated species having high extinction coefficients for infrared radiation. By invitation, Professor Partch has offered his Short Course on "Technologies for Particle Surface Modification" during the past year at the Particles 2002 Conference in Florida, at General Electric Co. in New York, and ( in shortened form) at the Fourth World Congress on Particle Technology in Sidney. Twice in 2 years NATO has invited him to serve as Advanced Research Workshop co-leader in Kiev for scientists in eastern block countries. This international and interdisciplinary exposure has resulted in co-investigator positions on proposals funded by the Cooperative Research and Development Foundation for research carried out jointly in the Ukraine and at Clarkson.
Research group of CAMP Professor Richard Partch shown with Seminar Speaker (fourth person from the left) Professor Klaus Albert from Tübingen, Germany. His expertise is in high resolution NMR for characterizing surfaces of particles used in HPLC columns. From left: Chris Syvinski, Nathaniel Barney, Allison Jaques, Professor Albert, Dr. Sudha Rani, Professor Partch, Evon Powell, Huifen Gao, and Gerd Fischer. Gerd is a visiting graduate student from Tübingen studying with Professor Partch.
Electrochemical methods provide inexpensive and powerful tools to deposit nanostructures and to tailor the nanostructure of existing surfaces. CAMP Professor Ian Suni is investigating the electrochemical deposition and dissolution of metals to form controlled nanostructures for applications to semiconductor processing, catalysis, and biosensor development. In one current CAMP project (in collaboration with ReynoldsTech in Syracuse, New York) he is investigating an electrochemical method for depositing a Cu seed layer atop the Ta barrier layer during interconnect formation on Si devices. Another CAMP project involves the development of an electropolishing method for copper planarization during Si device fabrication. Professor Suni is also involved in fundamental research supported by the National Science Foundation to develop new methods for controlled fabrication of metal nanoparticles and nanowires.
CAMP Professor Vladimir Privman, of Clarkson University's Departments of Physics and Electrical and Computer Engineering, is the Director of the Center for Quantum Device Technology. He is exploring implications of quantum physics for future nanotechnology and information processing. He has also contributed to theories of uniform fine particles. Professor Privman's main contributions have been in developing and evaluating approaches to utilize semiconductor heterostructures and quantum wells, based on the silicon-chip device technology, for quantum information processing (quantum computing). He has also worked in modeling electron transport of relevance to single-quantum measurement and control.
Professor Ming-Cheng Cheng has been studying the advanced transport models for modern MOS devices to account for extreme non-equilibrium states of electrons and holes including quantum transport phenomena of charge-carriers in the device channel. The investigation will lead to a better understanding of non-equilibrium charge carrier transport in modern MOS devices and may result in more accurate and efficient transport models for device simulation. In addition Professor Cheng's group is studying thermal flow in SOI (silicon-on-insulator) devices and HBTs (heterojunction bipolar transistors) including self-heating in static and dynamic situations. The objectives of this work are to understand the self-heating effect on the electronic characteristics of SOI devices and HBTs and to develop efficient and accurate thermal circuit models for these devices taking into account self-heating for microelectronic circuit simulations.