Naturally formed epitaxial diamond crystals in rubies
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- 作者：Gyeong-Su Park ; Sung Chul Bae ; Steve Granick ; Jang-Ho Lee ; Sang-Duk Bae ; Taekyung Kim ; J.M. Zuo
- 关键词：Diamond ; Epitaxy ; Raman spectroscopy ; Transmission electron microscopy
- 刊名：Diamond and Related Materials
- 出版年：2007
- 出版时间：February 2007
- 年：2007
- 卷：16
- 期：2
- 页码：397-400
- 全文大小：716 K
文摘
Materials inspired by nature comprise a running theme of modern science. Among the crystals that can be formed, diamond is perhaps most emblematic. In the conventional thinking, natural diamonds form only under high-pressure and high-temperature conditions. Here we show a new, natural form of diamond crystals of high quality that are epitaxial with their ruby substrate. Diamonds in rubies are rare; heteroepitaxial diamonds are twice as unexpected. Epitaxy suggests that the natural diamonds in the rubies were formed after ruby crystallization in a thermodynamically diamond stable region. This striking natural control over diamond epitaxy suggests a general strategy by which to form naturally-inspired, gem-quality crystals.