National Nanotechnology Infrastructure Network

National Nanotechnology Infrastructure Network

Serving Nanoscale Science, Engineering & Technology

Helene Craigg



University of Michigan

Geosciences Domain Expert

Dr Helene Craigg is responsible for developing interactions between the NNIN and the geo and environmental sciences community, especially as they relate to sensors and microsystems. She joined NNIN@Michigan in 2010, coming from Florida International University where she was working on nano polycrystalline materials and their properties under high pressure, high temperature.

Publications (Helene Craigg Couvy)

  • Couvy H., Chen J., Lahiri D., Agarwal A., Sen G. (2011): Nano-hardness and Young's modulus of nano-polycrystalline diamond. Scripta Materialia. 64 (11) 1019-1022
  • Couvy H., Cordier P., Chen J. (2011): Dislocation microstructures in majorite garnet experimentally deformed in the multianvil apparatus. American Mineralogy. 96 (4) 549-553.
  • Demouchy S., Mainprice D., Tommasi A., Couvy H., Barou F., Frost D J., Cordie, P. (2011): Forsterite to wadsleyite phase transformation under shear stress and consequences for the Earth's mantle transition zone. Physics of the Earth and Planetary Interior, 184 (1-2), 91-104
  • Couvy H., Chen J., Drozd V. (2010): Compressibility of nanocrystalline forsterite. Physics and Chemistry of Minerals. 37, 343-351
  • Chen J., Couvy H., Liu H., Drozd V., Daemen L.L., Zhao Y., Kao C-C. (2010): In situ x-ray study of ammonia borane at high pressure. International Journal of Hydrogen Energy, 35 (20), 11064-11070
  • Amiguet E., Raterron P., Cordier P., Couvy H., Chen J. (2009): Deformation of diopside single crystal at mantle pressure, 1: Mechanical data. Physics of Earth and Planetary Interiors. 177(3-4), 122-129.
  • George L., Drozd V., Couvy H., Chen J., Saxena S. K.(2009) :An extended high pressure- temperature phase diagram of NaBH4, Journal of Chemical Physics, 131, 074505, 2009
  • Rabier J., Renault P.O., Eyidi D., Demenet J.L., Chen J., Couvy H., Wang L. (2007): Plastic Deformation of Silicon Between 20 degrees C and 425 Degrees C. Phys. Status Solidi C, 4(8), 3110-3114.
  • Nyilas K., Couvy H., Cordier P., Ungar T. (2006): The Dislocation-Structure and Crystallite-Size in Forsterite (Olivine) Deformed at 1400°C by 11 GPa. Zeitschrift für Kristallographie Suppl., 23, 135-140.
  • Cordier P., Couvy H., Merkel S., Weidner D.J. (2005): Plastic deformation of minerals at high pressure: Experimental techniques. in "Mineral Behaviour at Extreme Conditions", R. Miletich, Ed. 339-355.
  • Couvy H. (2005): Experimental deformation of forsterite, wadsleyite and ringwoodite: Implications for seismic anisotropy of the Earth's mantle. Ph.D Dissertation. Universitaet Bayreuth and Université des Sciences et Technologies de Lille, Bayreuth and Villeneuve d'Ascq.
  • Mainprice D., Tommasi A., Couvy H., Cordier P., Frost D.J. (2004): Pressure sensitivity of olivine slip systems: implications for the interpretation of seismic anisotropy of the Earth's upper mantle. Nature, 433, 731-733.
  • Tommasi A., Mainprice D., Cordier P., Thoraval, C., Couvy H. (2004): Strain-induced seismic anisotropy of wadsleyite polycrystals and flow patterns in the mantle transition zone. Journal of Geophysical Research - Solid Earth. 109, B12405
  • Couvy H., Frost D.J., Heidelbach, F., Nyilas K., Ungár T., Mackwell S.J., Cordier P. (2004): Shear deformation experiments of forsterite at 11 GPa-1400°C in the multianvil apparatus. European Journal of Mineralogy, 16, 877-889.