CAMP Annual Report: Page 6
Non-contact Adhesion Characterization of Microparticles
The Photo-Acoustic Research (PAR) and Nanomechanics/Nanomaterials (NN) Laboratories (PAR) directed and co-directed by Professor Cetin Cetinkaya have been conducting analytical, computational and experimental studies in the areas of laser-based particle removal and non-contact adhesion measurements since 1999. There is a vast need in various industries for non-contact adhesion characterization of micro/nano-particles on flat and rough substrates. The PAR Lab has developed a novel characterization method to quantify the adhesion properties of single microparticles in a non-contact/non-destructive manner. Since the method does not require the dislodgement of the particle from its substrate, the contributions of external effects, such as humidity, electrical field, and temperature, can be studied on a single particle at the same contact point. This current research effort focuses on (nanoparticles) coated toner particles and pharmaceutical particles. The PAR and NN laboratories have received research funds from the National Science Foundation, Intel, SEMATECH, Xerox Corp., Wyeth Pharmaceuticals, Pfizer Inc., the Consortium for the Advancement of Manufacturing in Pharmaceuticals (CAMP), Praxair/Electronics, the US Army, as well as the Center for Advanced Materials Processing (CAMP) at Clarkson.
Modeling of the Chemical‑Mechanical Polishing Process
Professors Goodarz Ahmadi and S.V. Babu, in collaboration with the JSR company, are developing new models for the chemical‑mechanical polishing of low-k materials. Their analysis includes the influence of abrasive particles and pad surface micro-roughness. Earlier, Professor Ahmadi and his students studied the effect of abrasive particle shapes, slurry pH, and colloidal forces on the CMP removal rate.
Variations on Nanoparticle Research Themes
CAMP Senior University Professor Richard Partch's research group enjoys advancing both fundamental and applied aspects of nanoparticle technology.
Topics under active investigation include the following:
1) Preparation and evaluation of filled inorganic and organic composites for better thermal management in electronic devices such as thermal diffusion rollers in copy machines, in collaboration with Xerox-Webster, NY scientists and co-funded by NYSERDA and Xerox. A keynote address on this subject was presented by Professor Partch at the August, 2009 International MRS Meeting in Mexico.
2) Investigation of both dissolved and dispersed phases in slurries used in CMP. Core-shell abrasives are being created for better polishing selectivity and fundamental BHT chemical interaction information is being investigated to improve the C part of CMP. This research is funded by BASF and Micron.
3) Determination of possible catalytic effect of high surface area metals can enhance already known methods for conversion of waste organics into fuel oil; and, of optimum continuous reactor design for waste water treatment biomass feed. A private investor is funding a pilot plant assembly in 2010.
4) Application of pi-pi complexation between acceptor and donor aromatics is the principle being employed for creating filter adsorbants capable of removal of biotoxins commonly in contact with humans. One focus is on removal of the synthetic estrogen bis-phenol A leached from plastic bottles and cans into drinking water and food; another is carbofuran used on crops and incorporated into the food grown there.
5) Analysis of a commercial dopant applied to bullets which lengthens barrel life and improves accuracy, and development and evaluation of new nanoparticle materials having improved capabilities. This project is in collaboration with CAMP Professors Rasmussen and Shipp and is co-funded by NY State Grants for Growth and Otis Technology, Inc.
Dr. Santokh Badesha to Chair Clarkson University/CAMP's Industrial Advisory Board
Dr. Santokh Badesha, a Xerox Fellow at the Xerox Corporation (a Corporate Sponsor for CAMP), has been chosen to chair CAMP's Industrial Advisory Board. The Board's main role is to review and evaluate all aspects of CAMP's programs and activities and to provide advice to CAMP's administration in regards to future policies, projects and emerging areas of research, funding, and economic development. The advisory Board meets twice a year, coincident with CAMP meetings and consists of representatives from companies collaborating with CAMP as well as several senior CAMP faculty members.
Over the years, Dr. Badesha has served as a technical point of contact for numerous research projects at CAMP, providing valuable guidance and advice. He holds many honors and awards including 165 U.S. patents and an honorary doctorate from Clarkson University (that was presented at the Commencement on May 13, 2007).
U.S. Army Research Project on Smart Responsive Nanocomposites for Soldier Protection to include Photovoltaic Devices and Systems
The $2M Army Research Office (ARO) project on Smart Responsive and Nanocomposite Systems continues at Clarkson University. The research is led by CAMP Director Professor S.V. Babu and CAMP Professors Sergiy Minko and Igor Sokolov. It has been extended to include photovoltaic devices and systems. The team includes CAMP Professors Ahmadi, Cetinkaya, Jha, McLaughlin, Moosbrugger, Privman, Shipp, Ding, Marzocca, Aidun, Ming- Cheng Cheng, Krishnan, Roy, Katz, Goia, Rasmussen, Partch, and Suni. Goals of the project are to develop protective clothing and self-healing composites, and to improve and increase the efficiency of organic and inorganic solar cells.
Electroanalytical Characterization of Advanced Materials for Energy Storage and Conversion
New materials with nanoscale structures are playing progressively dominating roles in the advancement of the energy technologies. Electroanalytical techniques offer an effective tool for studying the intricate behaviors of these new materials. Professor Dipankar Roy's group at CAMP is exploring a range of such techniques to test and characterize functional materials for energy storage and conversion. The CAMP group's work focuses primarily on lithium ion batteries and certain types of photovoltaic systems including silicon-based and dye sensitized solar cells (DSSCs). Their experimental approach is based on a tactical combination of D.C. and A.C. electroanalytical methods such as voltammetry, galvanostatic cycling, coulometric titration, chrono-amperometry, electrochemical voltage spectroscopy, impedance spectroscopy (IS), as well as galvanostatic and potentiostatic intermittent techniques.
Metal oxide nanoceramics, processed by mechano-chemical methods, are being used for rapid-recharge, high capacity electrodes of lithium ion batteries. The performance characteristics of these electrodes, including their cyclability, rate capability, lithium intercalation properties, coulombic efficiency and Ragone plot features are routinely studied by employing different combinations of the above methods. Ionic liquids are being used to develop novel electrolytes for both lithium ion batteries and DSSCs. The temperature dependent electrical behaviors of these electrolytes are probed with IS. Electrochemically modified counter electrodes for DSSCs are also characterized with similar electrochemical techniques. More information about this work can be found at Professor Roy's website:http://people.clarkson.edu/~samoy/