Real-time observation of crystal evaporation in a metal phosphate at high temperature
SCIE
SCOPUS
- Title
- Real-time observation of crystal evaporation in a metal phosphate at high temperature
- Authors
- CHOI, SI YOUNG; Sung-Yoon Chung; Young-Min Kim; Jin-Gyu Kim
- Date Issued
- 2013-05-29
- Publisher
- AMER CHEMICAL SOC
- Abstract
- A number of experimental studies on crystal growth have been performed in connection with a variety of crystalline systems ranging from simple oxides to complex organic compounds. In contrast, little is known regarding how crystals evaporate. By using a combination of real-time high-resolution electron microscopy at high temperature, image simulations, and density functional theory calculations, we demonstrate the evaporation of metal-phosphate nanocrystals with flat surfaces at atomic resolution. In situ imaging and direct comparison with image simulation results reveal that, while a layer-by-layer lateral process is macroscopically maintained, the cations preferentially evaporate over the (PO4)(3-) tetrahedral anions from shrinking ledges. The present observations provide the first atomic-scale experimental details of the evaporation of complex oxides, emphasizing the value of direct visualization in real time.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/40883
- DOI
- 10.1021/ja401753u
- ISSN
- 0002-7863
- Article Type
- Article
- Citation
- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 135, no. 21, page. 7811 - 7814, 2013-05-29
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