Mineral Chemistry
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| Atomic Force Micrograph image of MgO (100) face etched in deionised water showing pyramidal etch pits. Dissolution of the MgO surfaces is controlled by the chemisorption of H2O molecules onto (h10) surfaces. |
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| Synchrotron X-ray studies of the weathering mechanisms of silicate minerals. Simultaneous EXAFS (Extended X-ray Asorption Fine Structure) and Glancing Incidence X-ray Reflectivity (GIXR) allow measurements of changes in the thickness and atomic arrangements in silicate surface and in solution boundary layers as thin as 2 nm. |
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| STM images: (a) of a monolayer of adenine assembled on diline and triline domains, (b) illustrating structural features of the adenine ordering. (c) is a high-contrast STM image exemplifying details of the surface ordering shown in (b). (d) The grey and black profiles are relative heights and are drawn from where the arrows G and H point in image (b), respectively. The black profile in (e) is drawn from where arrow F points in image (b), whereas the grey profile in (e) is taken from where arrow D points on the clean surface in the previous Fig. 1(b). Imaging parameters: (a) [95×95 nm2; Vs = 1.8 V; It = 0.04 nA]. (b) [51.4×19.7 nm2; Vs = 1.8 V; It = 0.05 nA]. (c) [19.6×19.6 nm2; Vs = 1.8 V; It = 0.05 nA]. |
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| Ceci n'est pas une pomme. |