Electrostatic Self-Assembly Processes for the Manafacturing of Optoelectronic Devices

Period of Performance: 07/31/1998 - 07/30/1999


Phase 1 STTR

Recipient Firm

Nanosonic, Inc.
158 Wheatland Drive Array
Pembroke, VA 24136
Principal Investigator
Firm POC

Research Institution

Virginia Polytechnic Institute
Sponsored Programs 0170
Blacksburg, VA 24061
Institution POC

Research Topics


The proposed program would demonstrate the feasibility of electrostatic self-assembly (ESA) methods developed at Virginia Tech for manufacturing multilayer thin-film optoelectronic devices and circuits. ESA processing involves the alternate coating of polymer, metal, ceramic or semiconductor substrates by the alternate adsorption of anionic and cationic complexes of polymers, metallic nanoclusters and other molecules from aqueous solutions at room temperature and pressure. Design of the molecules in each layer, molecular orientation, and the order of the layers allow spatial control of physical properties, including refractive index, electrical conductivity, carrier transport, luminescence, band gap, nonlinear optical (NLO) properties, surface hardness and degradation resistance. Incorporation of high performance polymers allows mechanical and thermal stability. Nanosonic has licensed five basic, wide-coverage patents from Virginia Tech to commercialize this technology. Through the STTR program, Nanosonic would work with Virginia Tech to demonstrate ESA-manufactured optoelectronic device and circuit products. Specific emphasis will be placed on use of ESA-formed NLO materials with second order susceptibilities exceeding that of lithium niobate, recently demonstrated by Virginia Tech. B. F. Goodrich process engineers would assist with chemical process scale-up during Phase II. Lockheed-Martin and Honeywell would provide Phase I materials and NLO device evaluation and potential Phase II development partnering.