Molecularly doped nanodiamond
AssigneeThe Government of the United States of America, as represented by the Secretary of the Navy
InventorsRhonda M. Stroud, Matthew J. Crane, Peter J. Pauzauskie
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Abstract
A method of making molecularly doped nanodiamond. A versatile method for doping diamond by adding dopants into a carbon precursor and producing diamond at high pressure, high temperature conditions. Molecularly doped nanodiamonds that have direct incorporation of dopants and therefore without the need for ion implantation. Molecularly-doped diamonds that have fewer lattice defects than those made with ion implantation.
Claims13
A molecularly doped nanodiamond made from the steps comprising:
- adding a dopant to a sol-gel precursor;
- synthesizing via sol-gel synthesis an amorphous carbon aerogel comprising an open pore network;
- drying the amorphous carbon aerogel;
- sintering the amorphous carbon aerogel;
- preserving the open pore network;
- loading the amorphous carbon aerogel into a diamond anvil cell;
- forming a sealed chamber around the amorphous carbon aerogel;
- flowing a noble gas into the sealed chamber;
- wherein the noble gas is one selected from the group consisting of Ar, Kr, Xe, and Ne;
- liquefying the noble gas by condensation;
- wherein the step of liquefying the noble gas by condensation comprises condensing the noble gas with liquid nitrogen or cryogen;
- allowing the liquefied noble gas to fill the open pore network of the doped amorphous carbon aerogel;
- generating noble gas defects within the doped amorphous carbon aerogel;
- wherein a uniform distribution of noble gas defects exists throughout the nanodiamond volume and characterized by a diamond lattice substantially free of ion-bombardment-induced displacement damage;
- wherein the uniform distribution of noble gas defects throughout the nanodiamond volume is characterized by an argon peak signature via Electron Energy Loss Spectroscopy (EELS);
- pressurizing the diamond anvil cell;
- wherein the step of pressurizing the diamond anvil cell comprises pressures ≥20 Gpa and wherein the step of heating the doped amorphous carbon aerogel comprises temperatures ≥2000K;
- heating the doped amorphous carbon aerogel incorporating the noble gas dopants;
- and
- transforming the doped amorphous carbon aerogel incorporating the noble gas dopants into molecularly doped nanodiamond incorporating the noble gas dopants.
A molecularly doped nanodiamond composition, comprising:
- a diamond crystal lattice characterized by being substantially free of ion-bombardment-induced displacement damage;
- and
- a uniform distribution of noble gas defect atoms residing substitutionally or interstitially within said diamond crystal lattice throughout the nanodiamond volume;
- wherein the uniform distribution of noble gas defects is characterized by an argon peak signature via Electron Energy Loss Spectroscopy (EELS), and
- wherein the diamond lattice exhibits crystalline-spacing lattice dimensions of 2.08 Å verified via Selected Area Electron Diffraction (SAED).
Dependencies are inferred from the claim text.