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- W2046454043 abstract "We perform molecular dynamics simulations to observe the structure and dynamics of SPC/E water in amorphous silica pores and amorphous ice pores with radii slightly larger than 10 Å. In addition to atomically rough pores, we construct completely smooth pores such that the potential felt at a given distance from the pore wall is an averaged atomic potential. As compared to rough walls, smooth walls induce stronger distortions of water structure for both silica and ice confinements. On the other hand, unlike the smooth pores, the rough pores strongly slow down water dynamics at the pore wall. The slowdown vanishes when reducing the atomic charges in the wall, i.e., when varying the hydroaffinity, while keeping the surface topology, indicating that it is not a geometric effect. Rather, it is due to the fact that the wall atoms provide a static energy landscape along the surface, e.g., fixed anchor-points for hydrogen bonds, to which the water molecules need to adapt, blocking channels for structural rearrangement. In the smooth pores, water dynamics can be faster than in the bulk liquid not only at the pore wall but also in the pore center. Changes in the tetrahedral order rather than in the local density are identified as the main cause for this change of the dynamical behavior in the center of smooth pores." @default.
- W2046454043 created "2016-06-24" @default.
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- W2046454043 creator A5050701161 @default.
- W2046454043 creator A5055872152 @default.
- W2046454043 creator A5071079338 @default.
- W2046454043 date "2015-01-21" @default.
- W2046454043 modified "2023-10-17" @default.
- W2046454043 title "Effect of the hydroaffinity and topology of pore walls on the structure and dynamics of confined water" @default.
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- W2046454043 doi "https://doi.org/10.1063/1.4905557" @default.
- W2046454043 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25612721" @default.
- W2046454043 hasPublicationYear "2015" @default.
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