- Developed a very complex multilayer, nano-scale materials architecture with continuous reel-to-reel, high-speed processing to achieve multiple world-records for the best properties in second-generation (2G) superconductor tape at several length scales (1 m to 1300 m).
- Demonstrated a unique technology to fabricate single-crystalline-like films on flexible, polycrystalline substrates over length scales of more than a kilometer.
- Developed thin film processing techniques for hetero-epitaxial growth of complex oxide materials such as perovskites, fluorites, bixbyites, pyrochlores, and rock-salts, by Ion Beam Sputtering, Magnetron Sputtering, E-beam Evaporation, Metal Organic Chemical Vapor Deposition (MOCVD), and Pulsed Laser Ablation.
- Developed a unique MOCVD process and equipment to control vapor phase reaction, phase equilibria, and growth kinetics to achieve superior electrical performance including world-records for the highest critical current at all length scales as well as the fastest superconductor deposition process (about 10 times faster than competing processes).
- Developed a nano-scale (7 nm to 80 nm) 5-layer oxide buffer architecture to achieve superior diffusion, epitaxy, texture, interfacial, and mechanical properties over lengths of 1,500 meters of tape.
- Engineered nano-defects (1 to 10 nm) into thin film structure to enhance the magnetic properties of HTS tape and achieved the world record of highest magnetic field generated at 77 K by any superconductor.
- Developed single crystalline-like germanium films for the first time on polycrystalline metal substrates and quartz substrates. This achievement has major benefit for low cost, high efficiency photovoltaics. III-V materials (GaAs) have been already successfully grown on these substrates with good photoluminescence. These templates can be used for other applications including solid state lighting and themoelectric waste heat recovery.
- Repeatedly successful in employing the Materials Science triangle of Process-Microstructure-Property relationships to engineer various materials architectures to meet end-use applications requirement.
- Conceived and demonstrated a novel crystal growth technique to produce large single-crystalline REBaCuO with a world-record critical current performance in bulk ceramics.
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Prof. Venkat Selvamanickam |
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RESEARCH ACCOMPLISHMENTS - Materials Science & Engineering