Influence of growth medium composition on the incorporation of boron in HPHT diamond

被引：15

作者：

Ekimov, E. A. ^{[1
]}

Sidorov, V. A. ^{[1
]}

Maslakov, K., I ^{[2
]}

Sirotinkin, B. P. ^{[3
]}

Krotova, M. D. ^{[4
]}

Pleskov, Yu, V ^{[4
]}

机构：

[1] Russian Acad Sci, Inst High Pressure Phys, Kaluzhskoe Rd 14, Moscow 108840, Russia

[2] Lomonosov Moscow State Univ, Dept Chem, 1-3 Leninskiye Gory, Moscow 119991, Russia

[3] Russian Acad Sci, Baikov Inst Met & Mat Sci, Leninskii Pr 49, Moscow 119991, Russia

[4] Russian Acad Sci, Frumkin Inst Phys Chem & Electrochem, Leninsky Prosp 31, Moscow 119071, Russia

来源：

基金：

俄罗斯基础研究基金会;

关键词：

Synthetic diamond; High pressure high temperature; Etching; Electrical properties characterization; Electrical conductivity; Electrochemical; SYNTHETIC DIAMOND; HIGH-PRESSURE; SUPERCONDUCTIVITY; TEMPERATURE; PARAMETER; GRAPHITE; COMPACTS; NITROGEN; NICKEL; COBALT;

D O I：

10.1016/j.diamond.2018.08.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Influence of growth medium composition on the efficiency of boron doping of carbonado-like diamond at 8-9 GPa was studied by diluting the C-B growth system with metallic solvents of carbon, Co and Ni. Addition of these metals to the original system leads to a decrease in the synthesis temperature, degree of doping with boron and suppression of superconductivity in diamond. According to XPS analysis, content of substitutional boron is equal to 0.07, 0.16 and 0.39 at.% in diamonds obtained in Co-C-B, Ni-C-B and C-B growth systems, respectively. Metallic behavior at normal temperatures and superconductivity below 5 K in diamond, synthesized in C-B system, change to semiconducting character of conductivity down to 2 K in diamonds obtained in the diluted systems; a faint hint of superconducting transition at 2 K was detected in the case of diamond grown in Ni-C-B system. By comparing phase composition of the inclusions and the doping efficiency of the diamonds, we are able to suggest that high chemical affinity of boron to boride-forming metals hinders the boron doping of diamond. The heavily boron-doped carbonado-like diamond compacts demonstrate high electrochemical activity in aqueous solutions and can be used as miniature electrodes in electrosynthesis and electroanalysis.

引用

页码：101 / 107

页数：7

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