Affiliation:
1. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
Abstract
Significance
Artificial diamond plays a vital role in the manufacturing industry, jewelry, and future photoelectronic devices, but it is a key challenge to prepare the required large-area diamonds. A distinctive way to solve this problem possibly hides in the undiscovered formation mechanism of thermodynamically metastable diamond compared to graphite in low-pressure chemical vapor deposition. We design a series of short-term growth on the margins of cauliflower-like nanocrystalline diamond particles and find that diamond is formed by the transformation from graphite, not by the piling up of sp
3
carbon. Atomically dispersed Ta atoms let the transition spontaneously occur. This subverts the general knowledge and supplies a way to prepare large-area diamonds based on large-sized graphite under normal pressure.
Funder
the national key research and developent program of china
the international science techenology cooperation program of china
The one belt and one road international cooperation program of China
National Natural Science Foundation of China
Natural Science Foundation of Zhejiang Province
Publisher
Proceedings of the National Academy of Sciences
Cited by
13 articles.
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