科研之友
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摘要
A series of quasi-elastic neutron scattering measurements were performed using IN6 at the Institute Laue Langevin for a mesoporous organosilica material with phenyl functions, called phenyltriethoxysilane (PTES). The aim of the experiment was to study the diffusion dynamics of nano-scale water clusters inside the hydrophobic pores as a function of temperature and hydration. By fitting the Debye-Waller factor, the data show clearly the different behavior between water, both inside and outside the hydrophobic pores, which resembles bulk water. The mean thermal displacement < u(2)> of the external water increases with T almost linearly up to 353 K, while the internal water quickly reaches the maximum at T similar to 323 K, indicating the confinement by an averaged pore diameter of the porous organosilica.
- 出版日期2010-7
