Combinatorial synthesis of thin film oxides. Thin film oxides are fabricated with intentional gradients in chemical composition. Coupled with high throughput analytical techniques, these combinatorial libraries enable an efficient survey of material properties across binary and ternary oxide phase space and mitigate uncertainties associated with sample-to-sample variations.
Thermochromic behavior of VO2-based materials. Vanadium dioxide is known to undergo a metal-to-insulator transition at 68 C, accompanied by an abrupt change in infrared reflectivity. If the transition temperature could be tuned to normal ambient temperatures, this thermochromic behavior could be valuable in an energy-saving ‘smart’ coating for building windows.
High-throughput measurements of IR optical properties in oxide thin films. A combinatorial library film is characterized by rapidly making local measurements of properties from many positions (and hence, compositions) across the thin film library.
Publications Prior to Joining NIST:
S. C. Barron, R. Knepper, N. Walker, T. P. Weihs: “Characterization of self-propagating formation reactions in Ni/Zr multilayered foils using reaction heats, velocities, and temperature-time profiles,” J. Appl. Phys., 109 013519 (2011).
NIST-ARRA Postdoctoral Associate
Functional Properties Group
Ph.D., Materials Science and Engineering, Cornell University
B.S., Materials Science and Engineering, Massachusetts Institute of Technology