Acoustic phonon dispersion along the chain of fully deuterated cellulose crystal
The acoustic phonon dispersion of cellulose will be measured to estimate the ideal longitudinal modulus of crystalline cellulose, which is the principal component of plant biomass, and the tensile load bearing element in many materials. The measurement of inelastic X-ray scattering measurement on hydrogenated sample left high uncertainty in the phonon velocity. We obtained fully deuterated cellulose sample, which should allow coherent inelastic scattering to measure the excitation along the acoustic phonon dispersion to drastically improve the reliability of the elastic constant estimation. The dynamic structure factor will be measured along the chain direction to a Q-range of 30 nm-1 and energy transfer of 100 meV as the modulus is estimated in the 200 GPa range.
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NISHIYAMA Yoshiharu; OGAWA Yu; WANG Hao and ZANOTTI Jean-Marc. (2020). Acoustic phonon dispersion along the chain of fully deuterated cellulose crystal. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-511
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