We demonstrate that the surface of an α-AlO(001) single crystal recrystallizes to α-AlO(OH) under ultrahigh pressure (8 GPa) at 600 °C. The recrystallization depends on the degree of surface roughness. A polished surface topotaxially recrystallizes to (100)-oriented α-AlO(OH) microcrystals, while unpolished surface recrystallizes to polycrystalline α-AlO(OH). This study demonstrates a new synthetic route to obtain oriented crystals of ultrahigh-pressure-phase materials and paves the way for the investigations of the physical and chemical properties of such materials.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7512432 | PMC |
| http://dx.doi.org/10.1021/acsomega.0c01376 | DOI Listing |
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