Additive manufacturing of large-area covalent organic framework thin films
AssigneeNorthwestern University
InventorsMark C. Hersam, William R. Dichtel, Nathan P. Bradshaw, Austin M. Evans
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Abstract
Systems and methods for preparing covalent organic framework (COF) thin films is disclosed herein. The systems and method utilize COF colloidal inks, having a diameter of 10-1000 nm, expelled through a nozzle onto a substrate to prepare the COF thin film. The plurality of COF colloidal ink droplets have an effective deposition diameter from the nozzle onto a masked or unmasked substrate, where the substrate may be heated to an effective COF deposition temperature.
Claims16
A method for preparing a covalent organic framework (COF) thin film, the method comprising expelling a plurality of COF colloidal ink drops having an effective deposition diameter from a nozzle onto the substrate,
- wherein expelling the plurality of COF colloidal ink drops comprises expelling a first plurality of COF colloidal ink drops and a second plurality of COF ink drops, the first plurality of COF colloidal ink drops comprising a first COF and the second plurality of COF colloidal ink drops comprising a second COF different than the first COF, and
- wherein the first plurality of COF colloidal ink drops are deposited on the substrate, thereby forming a thin film of the first COF, and the second plurality of COF colloidal ink drops are deposited on the thin film of the first COF or the first plurality of COF colloidal ink drops are deposited on a first substrate region and the second plurality of COF colloidal ink drops are deposited on a second substrate region different than the first substrate region.
A method for preparing a covalent organic framework (COF) thin film, the method comprising expelling a plurality of COF colloidal ink drops having an effective deposition diameter from a nozzle onto the substrate, wherein the plurality of COF colloidal ink drops dry as they make contact with the substrate and wherein the plurality of COF colloidal ink drops are expelled by a pneumatic system,
- wherein the pneumatic system comprises a COF colloidal ink flow regulator, a pressurizing gas flow regulator, and a pneumatic control system, wherein the pneumatic control system is configured to regulate the COF colloidal ink flow regulator and/or the pressurizing gas flow regulator to modulate the effective deposition diameter.
Dependencies are inferred from the claim text.