Dynamics at Surfaces: Probing the Dynamics of Polar and A‐Polar Liquids at Silica and Vapour Surfaces
- Conference date: 13–17 July 2008
- Location: Cambridge (Massachusetts)
Recent studies by Nuclear Magnetic Resonance and Neutron Scattering of the dynamics and phase‐fractions of water/ice systems in templated porous silicas (SBA‐15) indicate that what was believed to be a non‐frozen surface water layer is actually plastic ice, the quantity varying (continuously and reversibly) with temperature, and converting to a brittle (mainly cubic) ice at lower temperatures.
Current research relates to the study the dynamics of polar water/ice and a‐polar organics at both solid and vapour interfaces. The polar results are significant for water/ice systems in the environment, where snow‐packs, glaciers and icebergs are common examples of water/ice systems with extensive air/vapour interfaces.
This research also points the way forward for wide‐range cryoporometric metrology in ‘difficult’ systems such as high iron content clays and rocks, as well as aged concrete. Results are presented for cryoporometric measurements on meteorite samples with a significant metallic content, exhibiting relaxation times down to 2.5 ms.
- Surface dynamics
- Surface water
- Interface dynamics
- Liquid surfaces
- Water vapor
- Magnetic liquids
- Neutron scattering
- Nuclear magnetic resonance
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