Isakov, D., Petukhova, D., Vasilev, S., Nuraeva, A., Khazamov, T., Seyedhosseini, E. , Zelenovskiy, P., Shur, V. Y. and Kholkin, A. L. (2014) In situ observation of the humidity controlled polymorphic phase transformation in glycine microcrystals. Crystal Growth and Design, 14(8), pp. 4138-4142. (doi: 10.1021/cg500747x)
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Abstract
Glycine is a model crystal exhibiting three polymorphic phases and important functional properties such as piezoelectricity and ferroelectricity. We report here in situ observation of the irreversible transformation of the solution-grown glycine crystals from a β phase into a γ phase. The slow transformation process was monitored by piezoresponse force microscopy at room temperature. The process of β to γ conversion was entirely controlled by the variation of relative humidity in the sample chamber. The results show that the rate of phase transformation in glycine is humidity dependent with a threshold of about 25% RH. It is demonstrated that the phase boundary is highly rugged and the transformation front propagates inhomogeneously along the polar axis of the β phase. The mechanism of the phase transformation is discussed.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Seyed Hosseini, Dr Ensieh |
| Authors: | Isakov, D., Petukhova, D., Vasilev, S., Nuraeva, A., Khazamov, T., Seyedhosseini, E., Zelenovskiy, P., Shur, V. Y., and Kholkin, A. L. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Crystal Growth and Design |
| Publisher: | American Chemical Society |
| ISSN: | 1528-7483 |
| ISSN (Online): | 1528-7505 |
| Published Online: | 23 July 2014 |
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