Fig. 4From: Functionalized microneedles for continuous glucose monitoring(Reproduced with permission [110]. Copyright 2015, Springer Science + Business Media, LLC)a Schematic of the porous MN-based intercellular swelling measurement system. b A micrograph of the porous PEG MN. c Schematic of the DC resistance measurement by two porous MN array. d The DC resistance measured by the porous MN array and the circumference changed by a movementBack to article page