Process for isotropic structural colour printing and an apparatus for detecting a target substance in the gaseous phase
US10933654B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2017 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Dec 21, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M3/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to the present disclosure, an isotropic structural colour printing process is provided. The process comprising (a) providing an ink composition comprising ink particles (such as polymeric particles (e.g. polystyrene), metal-organic frameworks (MOFs) (e.g. ZIF-8)) in a liquid reagent; and (b) depositing the ink composition onto a surface of a substrate (e.g. anodic aluminium oxide membrane, photo papers). Due to capillary action and/or absorption of the liquid reagent, the ink particles form an amorphous arrangement of structures that lead to isotropic structural colour. In the preferred embodiment, the ink particles may further be coated with a catechol group (such as polydopamine). An apparatus for detecting a target substance in the gaseous phase, wherein the apparatus comprises a nanostructure capable of exhibiting a change in isotropic structural colour when one or more molecules of the target substance are entrapped as an indication that the target substance is present, is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.