TY - JOUR

T1 - Porous Natural Diamond with Embedded Metal (Pt0.50–Co0.50)

AU - Filatov, Evgeny

AU - Chepurov, Aleksei

AU - Sonin, Valeri

AU - Zadesenets, Andrey

AU - Gromilov, Sergey

AU - Zhimulev, Egor

N1 - This research was funded by the Russian Science Foundation, grant number 23-27-00129 (Egor Zhimulev).

PY - 2023/9

Y1 - 2023/9

N2 - Natural diamond crystals with a highly porous surface were used as substrates for synthesizing single-phase bimetallic Pt–Co nanoparticles at temperatures of 500 °C and 800 °C. The metal nanoparticles inside the pores were determined to take the form of single-phase Pt0.50Co0.50 solid solutions with different degrees of superstructure ordering. A detailed characterization of both nanoalloys revealed a tetragonal symmetry with a space group, P4/mmm. For the sample obtained at 500 °C, the lattice parameters were a = 2.673(2), c = 3.735(3) Å, and c/a = 1.397(1); for the samples obtained at 800 °C, the parameters were—a = 2.688(2), c = 3.697(3) Å, and c/a = 1.375(1). Within the experimental parameters, no significant chemical interaction of the diamond with the Pt–Co particles was identified. The results demonstrate a strong anchoring effect of the metallic material within the etching pores. The successful synthesis of bimetallic Pt–Co particles embedded inside the caverns can facilitate a study of their magnetic properties. The presence of Pt–Co in specific diamond compositions can also be used for marking diamond crystals as a means for their subtle identification, as well as confirming the possibility of capturing significant amounts of metal along with diamonds during their dissolution in the deep Earth.

AB - Natural diamond crystals with a highly porous surface were used as substrates for synthesizing single-phase bimetallic Pt–Co nanoparticles at temperatures of 500 °C and 800 °C. The metal nanoparticles inside the pores were determined to take the form of single-phase Pt0.50Co0.50 solid solutions with different degrees of superstructure ordering. A detailed characterization of both nanoalloys revealed a tetragonal symmetry with a space group, P4/mmm. For the sample obtained at 500 °C, the lattice parameters were a = 2.673(2), c = 3.735(3) Å, and c/a = 1.397(1); for the samples obtained at 800 °C, the parameters were—a = 2.688(2), c = 3.697(3) Å, and c/a = 1.375(1). Within the experimental parameters, no significant chemical interaction of the diamond with the Pt–Co particles was identified. The results demonstrate a strong anchoring effect of the metallic material within the etching pores. The successful synthesis of bimetallic Pt–Co particles embedded inside the caverns can facilitate a study of their magnetic properties. The presence of Pt–Co in specific diamond compositions can also be used for marking diamond crystals as a means for their subtle identification, as well as confirming the possibility of capturing significant amounts of metal along with diamonds during their dissolution in the deep Earth.

KW - Pt–Co

KW - X-ray diffraction

KW - diamond

KW - nanoparticles

KW - subduction

KW - surface micromorphology

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85172153044&origin=inward&txGid=b4412c3f04ad256dfd23d4467c08b8aa

UR - https://www.mendeley.com/catalogue/95a025f5-961c-3b35-a941-882a17a7be80/

U2 - 10.3390/chemistry5030123

DO - 10.3390/chemistry5030123

M3 - Article

VL - 5

SP - 1804

EP - 1814

JO - Chemistry (Switzerland)

JF - Chemistry (Switzerland)

SN - 2624-8549

IS - 3

ER -