Journal
DIAMOND AND RELATED MATERIALS
Volume 93, Issue -, Pages 75-83Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2019.01.029
Keywords
Diamond; HPHT synthesis; Hydrocarbons; Photoluminescence; Doping
Categories
Funding
- Russian Foundation for Basic Research [17-52-50075]
- Russian Science Foundation [14-12-01329]
- JSPS
- RFBR under the Japan - Russia Research Cooperative Program, JST-PRESTO [JPMJPR16P2]
- JST-CREST [JPMJCR1333]
Ask authors/readers for more resources
HPHT synthesis of diamonds from hydrocarbons attracts great attention due to the opportunity to obtain luminescent nano- and microcrystals of high structure perfection. Systematic investigation of diamond synthesized from the mixture of hetero-hydrocarbons containing dopant elements Si or Ge (C24H20Si and C24H20Ge) with a pure hydrocarbon - adamantane (C10H16) at 8 GPa was performed. The photoluminescence of SiV- and GeV- centers in produced diamonds was found to be saturated when Si and Ge contents in precursors exceed some threshold values. The presence of SiC or Ge as second phases in diamond samples with saturated luminescence indicates that ultimate concentrations of the dopants were reached in diamond. It is shown that SiC inclusions can be captured by growing crystals and be a source of local stresses up to 2 GPa in diamond matrix. No formation of Ge-related inclusions in diamonds was detected, which makes Ge more promising as a dopant in the synthesis method. Surprisingly, the synthesis of diamonds from the C24H20 Sn hetero-hydrocarbon was ineffective for SnV- formation: only fluorescence of N-and Si-related color centers was detected at room temperature. As an example of great potential for the synthesis method, mass synthesis of 50-nm diamonds with GeV- centers was realized at 9.4 GPa. Single GeV- production in individual nanodiamond was demonstrated.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available