Convective deposition for optical coatings

James F. Gilchrist

James F. Gilchrist

Associate Professor of Chemical Engineering

Lehigh University

My research and scholarly activities are designed to impact both science and engineering through fundamental studies of particulate systems. From an engineering viewpoint particle technology is ubiquitous, including pharmaceutical, chemical, agricultural, food, cosmetic, ceramic, electronic, and mining processes and in an uncountable number of natural processes including sediment transport in rivers, dune formation, and blood flow. Ideal particulate systems, often considered model complex systems, are typically far-from-equilibrium dissipative processes that result in self-organization and complex behavior. These systems are scientifically intriguing because they generally demonstrate behavior that is largely unpredictable by simple integration of constituent interactions. While the two-body interactions between individual particles are well-defined, the resulting phase behavior, structure, and dynamics of these systems often cannot be directly derived from relatively simple binary interactions. Unlike most single-phase fluids, a single set of constituent equations describing a broad range of suspension/granular flows does not exist; consequently these systems are poorly understood at all levels. The design and troubleshooting of solids handling and processing is in many ways as much an art as it is a science.

An overarching objective of my research is to develop a better understanding of these far-from-equilibrium particulate processes exhibiting complexity and self-organization. Research in our Laboratory for Particle Mixing and Self-Organization investigates phenomena ranging from the nano- to macroscale typically divided into colloidal and granular systems. To accomplish this, we identify prototypical complex systems for study and develop new experimental, computational, and analytical methods of investigation and analysis. Current projects include suspension transport in chaotic flows, suspension rheology and microstructure, convective deposition, suspension dielectrophoresis, and granular dynamics in vibrated systems. Paired with this fundamental research is the development of applications involving novel processes, materials, and devices. As the primary focus of my research is fundamental by nature, most applications resulting from this research are facilitated through collaborations developed since coming to Lehigh University. Applications include microfluidic- and industrial-scale mixing and separation, light emitting diode and dye sensitized solar cell coating and internal structure fabrication, fabrication of BioMEMS sensor platforms, and dynamic powder density measurement for online process analysis. My long-term interests aim to further fundamental understanding of suspensions and granular dynamics and to devise novel ways of controlling these interactions for applications.

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Microtech Conference & Expo  

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*Sponsorship Opportunities: Contact Chris Erb

Platinum Sponsor

BASF


Nanotech Platinum Sponsor

Chinano

Association Sponsor

Clean Technology and Sustainable Industries Organization (CTSI)

Producing Sponsors

Nano Science and Technology Institute

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*Sponsorship Opportunities: Contact Chris Erb

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