IP Library › Granted Patent US 12,259,651
Granted Patent B2
US 12,259,651 · App. 17/283,457 · Granted Mar 25, 2025

Photosensitive, inorganic ligand-capped inorganic nanocrystals

Inventors: Dmitri V. Talapin (La Grange Park, IL); Yuanyuan Wang (Nanjing, CN); Jia-Ahn Pan (Chicago, IL); Haoqi Wu (Chicago, IL)
Assignee: THE UNIVERSITY OF CHICAGO
G03F7/0042G03F7/0043G03F7/0045G03F7/008G03F7/20G03F7/32
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Quick Facts
Patent No.
US 12,259,651
App. No.
17/283,457
Granted
Mar 25, 2025
Kind
B2
Abstract

Ligand-capped inorganic particles, dispersions of the ligand-capped inorganic particles, and films composed of the ligand-capped inorganic particles are provided. Also provided are methods of patterning the films and electronic, photonic, and optoelectronic devices that incorporate the films. The ligands include bifunctional ligands and two-component ligand systems that include a photosensitive group, cation, or molecule.

Claims (33)

1. Ligand-capped inorganic crystals comprising:

inorganic crystals, each crystal having a surface;

alkyl carbamate anions bound to the surfaces of the inorganic crystals; and

photosensitive cations or photosensitive non-ionic molecules associated with the inorganic crystals.

2. The ligand-capped inorganic crystals of claim 1 , wherein the photosensitive cations or photosensitive non-ionic molecules are photoacid generators.

3. A solid film comprising the ligand-capped inorganic crystals of claim 1 on a substrate.

4. A method of patterning the film of claim 1 , the method comprising:

irradiating a first portion of the film with radiation, wherein the interaction between the radiation and the photosensitive cations or photosensitive non-ionic molecules results in the chemical modification of the film, while preventing a second portion of the film from being irradiated by the radiation; and

contacting the film with a solvent that dissolves the second portion of the film, but not the first portion of the film.

5. Ligand-capped inorganic crystals comprising:

inorganic crystals, each crystal having a surface;

inorganic anions bound to the surfaces of the inorganic crystals; and

2-phenyl-2-(-5-((tosyloxy)imino)thiophen-2-ylidene) acetonitrile molecules associated with the inorganic crystals.

6. The ligand-capped inorganic crystals of claim 5 , wherein the inorganic anions comprise metal halide anions.

7. A solid film comprising the ligand-capped inorganic crystals of claim 5 on a substrate.

8. A method of patterning the film of claim 7 , the method comprising:

irradiating a first portion of the film with radiation, wherein the interaction between the radiation and the 2-phenyl-2-(-5-((tosyloxy)imino)thiophen-2-ylidene) acetonitrile molecules results in the chemical modification of the film, while preventing a second portion of the film from being irradiated by the radiation; and

contacting the film with a solvent that dissolves the second portion of the film, but not the first portion of the film.

9. Ligand-capped inorganic crystals comprising:

inorganic crystals, each crystal having a surface;

inorganic anions bound to the surfaces of the inorganic crystals; and

1,2-naphthoquinonediazide-4-sulfonyl chloride molecules associated with the inorganic crystals.

10. The ligand-capped inorganic crystals of claim 9 , wherein the inorganic anions comprise metal halide anions.

11. A solid film comprising the ligand-capped inorganic crystals of claim 9 on a substrate.

12. A method of patterning the film of claim 11 , the method comprising:

irradiating a first portion of the film with radiation, wherein the interaction between the radiation and the 1,2-naphthoquinonediazide-4-sulfonyl chloride molecules results in the chemical modification of the film, while preventing a second portion of the film from being irradiated by the radiation; and

contacting the film with a solvent that dissolves the second portion of the film, but not the first portion of the film.

13. The ligand-capped inorganic crystals of claim 1 , wherein the alkyl carbamate anions are selected from butyl carbamate anions, propyl carbamate anions, pentyl carbamate anions, hexyl carbamate anions, and octyl carbamate anions.

14. The ligand-capped inorganic crystals of claim 1 , comprising the photosensitive cations associated with the inorganic crystals.

15. The ligand-capped inorganic crystals of claim 1 , comprising the photosensitive non-ionic molecules associated with the inorganic crystals.

16. The ligand-capped inorganic crystals of claim 1 , wherein the alkyl carbamate anions do not absorb radiation in the ultraviolet range of the electromagnetic spectrum.

17. The ligand-capped inorganic crystals of claim 5 , wherein the inorganic anions comprise metal chalcogenide anions.

18. The ligand-capped inorganic crystals of claim 9 , wherein the inorganic anions comprise metal chalcogenide anions.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 5, 2022
From: PAN, JIA-AHN; WANG, YUANYUAN; TALAPIN, DMITRI; WU, HAOQI
To: THE UNIVERSITY OF CHICAGO
Reel/Frame 061979/0887 →
CONFIRMATORY LICENSE Recorded Feb 23, 2022
From: UNIVERSITY OF CHICAGO
To: NATIONAL SCIENCE FOUNDATION
Reel/Frame 059221/0532 →
Continuity (4)
Provisional Application 62897748 · Sep 9, 2019
Provisional Application 62853448 · May 28, 2019
Provisional Application 62746710 · Oct 17, 2018
Related Publication 20220011664A1 · Jan 13, 2022
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