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US 12,509,351 B2Granted
Disaggregation of nanodiamond particles
AssigneesThe Curators of the University of Missouri, Daicel Corporation
InventorsVadym Mochalin, Atsushi Kume, Yoshihiro Inamoto, Masumi Hashimoto
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Abstract
Methods for disaggregating nanodiamond clusters, for example, by using sonication to break apart nanodiamond aggregates in an aqueous slurry having an alkaline pH. Compositions, such as aqueous nanodiamond dispersions and dry particulate compositions can be produced using these methods.
Claims20
A method of disaggregating nanodiamond clusters, the method comprising:
- combining aggregated nanodiamond clusters in a liquid medium comprising a solvent, and ozone oxidized nanodiamond clusters to obtain a mixture, wherein the aggregated nanodiamond clusters and solvent are present in a slurry having a pH of between about 8 and about 11;
- and
- sonicating the mixture for a time sufficient to produce nanodiamond particles having a median particle size less than the median particle size of the aggregated nanodiamond clusters;
- wherein the nanodiamond particles have a median particle size of less than about 10 nm;
- and
- wherein the method further comprises graphitizing the aggregated nanodiamond clusters.
3 more elements
Dependencies are inferred from the claim text.