We are developing fluorescent probes to obtain dynamic two-dimensional pressure maps of shocked microstructured materials. We have fabricated silica nano- or micro-spheres doped with rhodamine 6G dye (R6G) which fluoresce strongly, and which may be dispersed throughout a microstructured sample. Alternatively we can grow thin skin layers of dye-doped silica on the surface of particles. The emissive microspheres were embedded in poly-methyl methacrylate (PMMA) and were excited by a quasi-continuous laser. When the samples were shocked to 3-8.4 GPa using laser-driven flyer plates, the emission redshifted and lost intensity. When encapsulating the dye in silica, the emission became brighter and the intensity-loss response became fast enough to monitor nanosecond shock effects. Preliminary data are reported showing the intensity loss in a shocked microstructured medium, an artificial sand, consisting of dye-coated silica microspheres.
|Title of host publication
|Shock Compression of Condensed Matter - 2015
|Subtitle of host publication
|Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
|Ramon Ravelo, Thomas Sewell, Ricky Chau, Timothy Germann, Ivan I. Oleynik, Suhithi Peiris
|American Institute of Physics Inc.
|Published - Jan 13 2017
|19th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2015 - Tampa, United States
Duration: Jun 14 2015 → Jun 19 2015
|AIP Conference Proceedings
|19th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2015
|6/14/15 → 6/19/15
ASJC Scopus subject areas
- General Physics and Astronomy