MR13A-2688
Applications of sample nanofabrication in diamond-anvil cell experiments
Monday, 14 December 2015
Poster Hall (Moscone South)
Jeffrey S Pigott1, Rebecca A. Fischer2, Rostislav Hrubiak3, Henry P Scott4 and Wendy R Panero1, (1)Ohio State University Main Campus, Columbus, OH, United States, (2)University of Chicago, Chicago, IL, United States, (3)Carnegie Institution of Washington, High Pressure Collaborative Access Team (HPCAT), Argonne, IL, United States, (4)Indiana Univ South Bend, South Bend, IN, United States
Abstract:
We use electron gun evaporation, sputter deposition, and photolithography to fabricate samples for laser-heated diamond anvil cell experiments. With complimentary thermal modeling, the sample geometry can be optimized and tailored to the experimental application. Here we highlight equation of state studies using nanofabricated double-hot plate samples. The homogeneous samples produced by our methods lead to exceptionally even heating both spatially and temporally that produced high-quality equations of state for nickel and stishovite. The Fe and Pt mutual equations of state may be well characterized and we show recent progress in fabricating samples consisting of a layered stack of Pt/SiO2/Fe/SiO2 in which the SiO2 serves to prevent the alloying of Fe and Pt. Finally, by exploiting state-of-the art nanofabrication techniques, we explore a wider range of the potential applications of such samples including high-pressure, high-temperature diffusion, melting, and thermal conductivity. Using the TempDAC code, we investigate the ideal sizes and ratios of the sample, heating laser diameter, and x-ray spot size while quantifying the effect of x-ray misalignment.
