Atomic Force Microscopy, Advanced Materials, and Biophysics
CAMP Professor Igor Sokolov of Physics is doing research in three main areas: intermolecular forces, synthesis of new nanostructured materials, and mechanics of biological cells. He uses Atomic Force Microscopy for studying interactions between nanoparticles and various surfaces. His research about the self-assembly of nanoporous colloids focuses on the synthesis of colloidal particles of different shapes and various functions. This includes making "smart dust" fluorescent particles with encoded color "bar codes", which can be used in biomedical labeling, security and product tagging, assembly of micron-sized thermometers, pH meters, oxygen sensors, etc. The assembled particles can also be used for drug delivery, as matrix for 3D catalysts, etc. Some of his research relates to making self-healing polymeric materials (in collaboration with CAMP Professors Ahmadi, McLaughlin, Moosbrugger, Morrison, Jha, and Privman) and to the study of the mechanics of human cells. In collaboration with Biology Professor Craig Woodworth, he is studying the biomechanical properties of ageing and of human cancer cells. Professor Sokolov is working with CAMP Professor Ian Suni and Chemistry Professor Linda Luck in studying a new architecture of biosensors. Another topic of his research involves making carbon nanofibers for microcomposite materials (in collaboration with Ed Marin of Composite Factory, Inc.).
Electrochemical Deposition of Metals for Semiconductor and Nanotechnology Applications
Electrochemical methods provide inexpensive and powerful tools to deposit nanostructures and to tailor the nanostructure of surfaces. Nanostructural control is often required for semiconductor materials, which have stringent size and planarity requirements. CAMP Professor Ian Suni is using electrochemical deposition and dissolution of metals to control surface structure for applications to semiconductor processing, catalysis, and fuel cells. For example, his laboratory has pioneered the application of electrochemical methods to engineering of Ta diffusion barriers for semiconductor devices. Professor Suni also has federal support for fundamental research into new types of electrochemical biosensors .
CAMP Professor Vladimir Privman, of Clarkson University's Departments of Chemistry, Electrical and Computer Engineering, and Physics, is the Director of the NSF-funded Center for Quantum Device Technology, exploring implications of quantum physics for future nanotechnology and information processing. The Center'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) and spintronics.
Professor Privman's broad research interests cover such diverse subjects as colloid chemistry, soft condensed matter, and statistical mechanics. His recent achievements in these fields cover the following topics: Monolayer and multilayer surface adhesion of colloidal particles, and general modeling of surface deposition and relaxation at surfaces; Explaining, and theoretically predicting, the narrow particle size distribution in synthesis of colloid particles by nucleation of precursor nano-crystals and their subsequent growth and self-assembly into larger particles; Phenomenological and numerical studies of mechanisms of growth, and shape and morphology selection in synthesis of colloids, polymers, and nano-size particles; Particle transport and aggregation to form large composite particles, surface deposits, sediments, and other systems (e.g., seeding and coating growth processes, and deposition on nano-patterned surfaces; Self-healing materials, including their structure and mechanical properties.
Professor Emeritus Greg Campbell, director of CAMP's Extrusion and Mixing Consortium, continues to develop a more descriptive analysis for screw pumps, augers, and extruders. Over the past year much of his group’s effort has been focused on the conveying of particular solids with these devices. In addition, his group is working to understand structure development in concentrated two phase systems. They found that bimodal dispersions act quite differently from single particle size systems. Also they have an actual program focused on understanding the reactions and physical changes that occur in an epoxy which forms liquid crystalline structures.
Novel Electrolytes for Sensor Applications
Professor Dipankar Roy’s research group at Clarkson University is using a number of D.C. and A.C. electrochemical techniques to design and characterize novel electrolytes for various sensor applications. In recent years, the group has studied and developed several aqueous electrolytes for corrosion monitoring electrochemical sensors. During the first half of 2006, they extended their research in this area to quantitative studies of non-aqueous electrolytes. Currently, Professor Roy’s group is developing such non-aqueous electrolytes for impedance-based Electrochemical Tilt Sensors that can operate over a large temperature range. In this work, cyclic voltammetry and potential step techniques are used to determine electrochemical (stability) windows for the novel electrolytes, and A.C. impedance methods are employed to examine detailed kinetics of surface reactions that dictate the sensor-performance. The latter work is supported by Spectron Glass and NYSTAR. Further details about Professor Roy’s current research on electrochemical sensors can be obtained by contacting him at: 315-268-6676 (phone), 315-268-6610 (Fax), or firstname.lastname@example.org (e-mail).