"Application of a new composite cubic-boron nitride gasket assembly for high pressure inelastic x-ray scattering studies of carbon related materials"

Lin Wang: Wenge Yang, Yuming Xiao, Bingbing Liu, Paul Chow, Guoyin Shen, Wendy L. Mao, and Ho-kwang Mao; Rev. Sci. Instrum., 07/13/11.

Additional Authors: Wenge Yang, Yuming Xiao, Bingbing Liu, Paul Chow, Guoyin Shen, Wendy L. Mao, and Ho-kwang Mao

Abstract:

We have developed a new composite cubic-boron nitride (c-BN) gasket assembly for high pressure diamond anvil cell studies, and applied it to inelastic x-ray scattering (IXS) studies of carbon related materials in order to maintain a larger sample thickness and avoid the interference from the diamond anvils. The gap size between the two diamond anvils remained ∼80 μm at 48.0 GPa with this new composite c-BN gasket assembly. The sample can be located at the center of the gap, ∼20 μm away from the surface of both diamond anvils, which provides ample distance to separate the sample signal from the diamond anvils. The high pressure IXS of a solvated C60 sample was studied up to 48 GPa, and a pressure induced bonding transition from sp2 to sp3 was observed at 27 GPa