Abstract: In one aspect a printable medium is disclosed, comprising flakes and a liquid, wherein the flakes comprise silver, graphene, or a mixture thereof, and have a length of from 0.1 ?m to 3 ?m, a thickness of 0.8 nm to 100 nm, and an aspect ratio of from 5:1 to 3750:1. In another aspect an article is disclosed comprising a conductive layer, a porous receiving layer, and a base layer, wherein the conductive layer is provided on the porous receiving layer, the porous receiving layer is provided on the base layer, the conductive layer comprises flakes; and the porous receiving layer has a surface roughness of 500 nm or less.

Abstract: A housing for a diagnostic device comprising a bottom layer comprising a metallised film laminate or foil laminate, a polymeric spacer layer, wherein the bottom layer and the spacer layer define at least one cavity; and a peelable upper layer comprising a foil laminate, the upper layer being removable from the housing to thereby expose at least a portion of the cavity.