IP Library › Granted Patent US 12,344,571
Granted Patent B1
US 12,344,571 · App. 17/365,924 · Granted Jul 1, 2025

Organic color center-tailored, semiconducting carbon nanotubes and their method of manufacture

Inventors: Yuhuang Wang (Laurel, MD); Hongbin Luo (College Park, MD); Peng Wang (Rockville, MD)
Assignee: University of Maryland, College Park
C07C211/53C01B32/159C01B32/174C07C209/68C09B68/22C09B68/40C09K11/06C01B2202/02C01B2202/28C01P2002/82C01P2002/84C01P2004/04C01P2006/60C07C2604/00C09K2211/1007
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Quick Facts
Patent No.
US 12,344,571
App. No.
17/365,924
Granted
Jul 1, 2025
Kind
B1
Abstract

Organic color center-tailored carbon nanotubes, particularly semiconducting single-walled carbon nanotubes, are of significant interest for imaging, sensing, and quantum information processing applications. A high-yield, simple, one-pot synthetic route for producing these materials exceeding the current μg/mL scale is provided. Adding an acid solution of raw carbon nanotubes, nitrite, and an aniline derivative into a reactive solvent, such as water, results in covalently bonded organic color center-tailored nanotubes. No radical initiator or heating is required for the reaction. The chemistry works for all the nanotube chiralities investigated. The synthesized materials are neat solids that can be readily dispersed in either water or an organic solvent using a surfactant or polymer depending on the specific application. The OCC-products can also be further sorted into single chirality-enriched fractions with defect-specific photoluminescence that is tunable over approximately 1100 to approximately 1550 nm.

Claims (14)

1. An organic color center (OCC)-tailored nanomaterial prepared by a method comprising:

a) mixing-nanomaterials with an acid selected from chlorosulfonic acid and triflic acid, a nitrite salt, and one or more aniline derivative to produce a mixture; and

b) adding the mixture to a reactive solvent to form the OCC-tailored-nanomaterial,

wherein the nanomaterials are carbon nanomaterials or boron nitride nanomaterials, and

wherein the one or more aniline derivative is 2-fluoro-4-nitroaniline, 4-amino-2-fluorobenzoic acid, 4-amino-2,3,5,6-tetrafluorobenzoic acid, 4-amino-3-fluorobenzoic acid, 4-amino-2,3-difluorophenol, 4-amino-3,5-difluorophenol, 2-amino-5-fluorophenol, 4,5-difluoro-2-methoxyaniline, 3,5-difluoro-2-methoxyaniline, 4-fluoro-2,3-dimethylaniline, 4-fluoro-3,5-dimethylaniline, 2-fluoro-4-methoxyaniline, 3-fluoro-2-methoxyaniline, 5-fluoro-2-methoxyaniline, or 2-fluoro-5-(trifluoromethoxy)aniline.

2. The OCC-tailored nanomaterial of claim 1 , wherein the reactive solvent is ethanol.

3. The OCC-tailored nanomaterial of claim 1 , wherein the reactive solvent is ethanol, propanol, butanol, pentanol, hexanol, ammonia, methylamine, ethylamine, diethylamine, phenol, their isotopic variants, or combinations thereof.

4. The OCC-tailored nanomaterial of claim 1 , wherein the nanomaterials are single-walled carbon nanotubes, or double-walled carbon nanotubes.

5. The OCC-tailored nanomaterial of claim 1 , wherein the acid is chlorosulfonic acid.

6. The OCC-tailored nanomaterial of claim 1 , wherein the reactive solvent comprises H 2 O, methanol, ethanol, propanol, butanol, pentanol, hexanol, ammonia, methylamine, ethylamine, diethylamine, phenol, their isotopic variants, or combinations thereof.

7. The OCC-tailored nanomaterial of claim 1 , wherein the nitrite salt is LiNO 2 .

8. The OCC-tailored nanomaterial of claim 1 , wherein a concentration of nanomaterials dissolved in the acid is in a range from 1 μg/mL to 50,000 μg/mL.

9. The OCC-tailored nanomaterial of claim 1 , wherein the nanomaterials are carbon nanomaterials.

10. The OCC-tailored nanomaterial of claim 1 , wherein the one or more aniline derivative is 4-amino-2,3,5,6-tetrafluorobenzoic acid.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2024
From: WANG, YUHUANG; LUO, HONGBIN; WANG, PENG
To: UNIVERSITY OF MARYLAND, COLLEGE PARK
Reel/Frame 068048/0045 →
Continuity (2)
Provisional Application 63217645 · Jul 1, 2021
Provisional Application 63046969 · Jul 1, 2020
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