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US 12,351,463 B2Granted
Heteroatom-doped nanodiamond
AssigneeDaicel Corporation
InventorsTomoaki Mahiko, Yuto Makino, Akihiko Tsurui, Ming Liu, Masahiro Nishikawa
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Abstract
The present invention is to provide a heteroatom-doped nanodiamond, the heteroatom-doped nanodiamond being doped with at least one heteroatom, the heteroatom-doped nanodiamond satisfying criteria (i) and/or (ii) below: (i) a BET specific surface area being from 20 to 900 m2/g, and (ii) an average size of primary particles being from 2 to 70 nm.
Claims12
Heteroatom-doped nanodiamond particles, wherein
- the heteroatom-doped nanodiamond particles being doped with at least one heteroatom, and
- the heteroatom-doped nanodiamond particles satisfying requirements (i) to (iv) below:
- (i) a BET specific surface area being from 35 to 600 m2/g,
- (ii) an average size of primary particles being from 3 to 55 nm,
- (iii) a carbon content being from 70 to 99 mass %, a hydrogen content being from 0.1 to 5 mass %, and a nitrogen content being from 0.1 to 5 mass %, and
- (iv) a ratio (D/G) of a peak area (D) of diamond to a peak area (G) of graphite by Raman spectroscopy being from 0.2 to 9,
- wherein the heteroatom-doped nanodiamond has a fluorescence emission peak originated from at least one heteroatom-vacancy center, and
- wherein the heteroatom comprises at least one selected from the group consisting of Group 14 elements, nickel and boron.
5 more elements
Dependencies are inferred from the claim text.