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Issue 44, 2018
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Synthesis and characterization of diamonds with different nitrogen concentrations under high pressure and high temperature conditions

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Abstract

In this study, {111}-oriented diamond crystals with different nitrogen concentrations were successfully synthesized in a series of experiments at 5.8 GPa pressure and 1380–1400 °C temperature. The nitrogen-vacancy (NV) centers were investigated in diamonds with different nitrogen concentrations. The Raman measurements indicated that the nitrogen atoms caused the Raman peaks to shift to a lower frequency. The photoluminescence (PL) results showed that the intensity of the negatively-charged nitrogen-vacancy (NV) centers increased with the increase in the nitrogen content when the diamonds had low nitrogen content (<80 ppm). With a further increase in the nitrogen content in the diamond crystals (>372 ppm), the intensity of the NV centers gradually decreased until it became undetectable. Additionally, we found that the neutral nitrogen-vacancy (NV0) centers were more common in diamonds with low nitrogen content. We believe that the results of this study provide a better understanding of the relationship between the nitrogen content and the NV centers in high pressure and high temperature (HPHT) synthetic diamonds.

Graphical abstract: Synthesis and characterization of diamonds with different nitrogen concentrations under high pressure and high temperature conditions

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Publication details

The article was received on 10 Sep 2018, accepted on 17 Oct 2018 and first published on 18 Oct 2018


Article type: Paper
DOI: 10.1039/C8CE01533C
Citation: CrystEngComm, 2018,20, 7164-7169
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    Synthesis and characterization of diamonds with different nitrogen concentrations under high pressure and high temperature conditions

    L. Chen, X. Miao, H. Ma, L. Guo, Z. Wang, Z. Yang, C. Fang and X. Jia, CrystEngComm, 2018, 20, 7164
    DOI: 10.1039/C8CE01533C

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