公开(公告)号：US20240077448A1

公开(公告)日：2024-03-07

申请号：US18242027

申请日：2023-09-05

Applicant: Matrix Sensors, Inc.

Inventor： Ignacio Luz Minguez ,  Michel Chen

IPC: G01N27/22

CPC classification number: G01N27/225 ,  G01N29/036

Abstract: The disclosure provides a gas permeable electrode and method for making the electrode to create diffusion pathways (or pores) in the metal electrode in a manner that is not destructive to delicate or soft sensing material. A first polymer, which is gas-permeable, is applied as a continuous coating over a surface of the sensing material. A second polymer that is immiscible with the first polymer is applied over a surface of the first polymer (e.g., spray-dry deposition of the second polymer) to form a micro-pattern or a polymeric template. The incompatibility/immiscibility between the first polymer and the second polymer leads to segregation of the second polymer into a pattern of discontinuous bumps, dots, islands or blobs on top of the first polymer. The porous electrode comprises at least one layer of an electrically conductive metal that is deposited over the first and second polymers. Bumps of the second polymer promotes small cracks or voids in the metal electrode layer that enable fast diffusion of analytes through the electrode.