Darkins, Robert;
McPherson, Ian J;
Ford, Ian J;
Duffy, Dorothy M;
Unwin, Patrick R;
(2022)
Critical Step Length as an Indicator of Surface Supersaturation during Crystal Growth from Solution.
Crystal Growth and Design
, 22
(2)
pp. 982-986.
10.1021/acs.cgd.1c01249.
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Abstract
The surface processes that control crystal growth from solution can be probed in real-time by in situ microscopy. However, when mass transport (partly) limits growth, the interfacial solution conditions are difficult to determine, precluding quantitative measurement. Here, we demonstrate the use of a thermodynamic feature of crystal surfaces-the critical step length-to convey the local supersaturation, allowing the surface-controlled kinetics to be obtained. Applying this method to atomic force microscopy measurements of calcite, which are shown to fall within the regime of mixed surface/transport control, unites calcite step velocities with the Kossel-Stranski model, resolves disparities between growth rates measured under different mass transport conditions, and reveals why the Gibbs-Thomson effect in calcite departs from classical theory. Our approach expands the scope of in situ microscopy by decoupling quantitative measurement from the influence of mass transport.
| Type: | Article |
|---|---|
| Title: | Critical Step Length as an Indicator of Surface Supersaturation during Crystal Growth from Solution |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.cgd.1c01249 |
| Publisher version: | https://doi.org/10.1021/acs.cgd.1c01249 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Technology, Chemistry, Multidisciplinary, Crystallography, Materials Science, Multidisciplinary, Chemistry, Materials Science, CALCITE GROWTH, KINETICS, PRECIPITATION, MORPHOLOGIES, DEPENDENCE, MECHANISMS, AFM |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10143346 |
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