Unique reactivity of nanoporous cellulosic materials mediated by surface-confined water

Slow dynamics of supercooled water confined in nanoporous silica materials

We review our incoherent quasielastic neutron scattering (QENS) studies of the dynamics of supercooled water confined in nanoporous silica materials. QENS data were analysed by using the relaxing cage model (RCM) previously developed by us. We first use molecular dynamics (MD) simulation of the extended simple point charge model (SPC/E) for bulk supercooled water to establish the validity of th...

Simulating Confined Fluids in Nanoporous Materials

If people could shrink themselves down and enter the world of nanoporous materials—solid materials like activated carbon or porous glasses that have pores of nanometer size—they would encounter exotic phenomena that were quite unexpected on the basis of everyday experience. Even thermodynamic properties thought of as constant such as the freezing point of water can be markedly depressed when fl...

Topological quantum phases of 4He confined to nanoporous materials.

The ground state of (4)He confined in a system with the topology of cylinder can display properties of solid, superfluid, and liquid crystal. This phase, which we call a compactified supersolid (CSS), originates from wrapping the basal planes of the bulk hcp solid into concentric cylindrical shells, with several central shells exhibiting superfluidity along the axial direction. Its main feature...

Water confinement in nanoporous silica materials.

The influence of the surface polarity of cylindrical silica nanopores and the presence of Na(+) ions as compensating charges on the structure and dynamics of confined water has been investigated by molecular dynamics simulations. A comparison between three different matrixes has been included: a protonated nanopore (PP, with SiOH groups), a deprotonated material (DP, with negatively charged sur...

Towards ultra-stiff materials: Surface effects on nanoporous materials