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Timothy M. Banks

Timothy M. Banks. Raman Spectroscopy study and NanoIndentor study on the effects of high pressures on Hexagonal Boron Nitride. Experiment. Purpose Background Techniques Results. Purpose. Super-hard material Determine Raman Scattering effects Determine hardness. Diamond Anvil Cell.

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Timothy M. Banks

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  1. Timothy M. Banks Raman Spectroscopy study and NanoIndentor study on the effects of high pressures on Hexagonal Boron Nitride

  2. Experiment • Purpose • Background • Techniques • Results

  3. Purpose • Super-hard material • Determine Raman Scattering effects • Determine hardness

  4. Diamond Anvil Cell • Applications • Varieties • Alabama Cell

  5. Diamond Anvil Cell

  6. Raman Spectroscopy • Raman Effect • C.V. Raman • Rayleigh scattering • Photons

  7. Hexagonal Boron Nitride • “White Graphite” • First discovered in 19th century • Chemical composition

  8. Hexagonal Boron Nitride • APPLICATIONS • Industrial • Cosmetic • Chemical

  9. Hexagonal Boron Nitride SEM-image (secondary electron image) of hexagonal boron nitride.

  10. Experimental Procedure • Prepare Gasket • Pressure Measurement • P=380.8 [ ]5-1)GPa • Raman Spectra • NanoIndenter XP  0

  11. Pressures Reached • 8 GPa (L1) • 42 GPa (L2) • 29 GPa (L3) • 13 GPa (L4)

  12. Pressure vs. Photon Energy

  13. Results • Raman Spectra • Spring Constant • NanoIndentor Results

  14. Spring Constant vs. Pressure

  15. Summary & Conclusions • Raman Scattering • Hardness

  16. Acknowledgements • It is with great pride and gratitude that I would like to thank the following for their guidance and support: Dr. Yogesh K. Vohra, Nenad Velisavljevic, Reed Patterson, Ginger Hughes, UAB Physics Department, and the National Science Foundation.

  17. The EndThank You

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