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Size-controllable synthesis of ultrasmall diamonds from halogenated adamantanes at high static pressure

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Abstract We report on the use of dibromoadamantane C10H14Br2 as a promising precursor for the mass synthesis of ultrasmall diamonds at an industrially accessible pressure of 8 GPa. Under pressure,… Click to show full abstract

Abstract We report on the use of dibromoadamantane C10H14Br2 as a promising precursor for the mass synthesis of ultrasmall diamonds at an industrially accessible pressure of 8 GPa. Under pressure, the formation of nanodiamonds upon decomposition of C10H14Br2 starts at the record low temperature of 1000 К. As a result of the decomposition, effective nucleation of diamonds and their slow growth at temperatures up to 2000 K provide favorable conditions for the size-controlled synthesis of nanodiamonds by changing the synthesis temperature. We show that chloroadamantane, C10H15Cl, is also a good candidate for producing nanodiamonds.

Keywords: synthesis; synthesis ultrasmall; ultrasmall diamonds; pressure; size controllable

Journal Title: Carbon
Year Published: 2019

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