HGW

Contents

HGW#

Introduction

Intro paragraph

Plan

Cryo-EM

Summary

Notes

To Do

Think about coherent plan
Implement

Colaboration

May be talk with Jacques Dubochet

ASW vs HGW#

Results from Neutron Scattering

Note

Insert Loerting article with RDF …

Difference in porosity … Surface properties are also different

Production Methods#

Vapor deposition#

Note

Make links with ASW

[Kuroda and Lacmann, 1982]: Theory, ice growing from vapour deposition, changes with temperature, -35°C – -4°C, vapour – quasi-liquid – solid mechanism / adhesive growth / 2D nucleation growth, type of surface structure (and thus growth mechanism) depends on surface orientation ({0001} or {1010} face) and temperature, spherical volume diffusion field near {0001} face, cylindrical volume diffusion field near {1010} face, surface diffusion from {0001} to {1010} faces

High pressure jet freezing#

[]: produce vitrified (=glassy) water in a jet, compare X-ray diffraction patterns to vapour deposited ASW

Characterisation#

Scattering#

[]

Cryo EM#

Properties#

Glass transition and heat capacity#

Note

to define

[Hallbrucker et al., 1989]: differential scanning calorimetry, 103 – 273 K, thermally reversible glass-liquid transition (Tg = 136 K, activation energy of structural relaxation ≈ 55 kJ/mol, transition width 12 K, increase in heat capacity = 1.6 kJ/mol), liquid water forms from glassy water at 146 K, crystallization near 232 K.