Graphene-Metal Composite Sensors with Near-Zero Temperature Coefficient of Resistance.

ABSTRACT: This article describes the design of piezoresistive thin-film sensors based on single-layer graphene decorated with metallic nanoislands. The defining characteristic of these composite thin films is that they can be engineered to exhibit a temperature coefficient of resistance (TCR) that is close to zero. A mechanical sensor with this property is stable against temperature fluctuations of the type encountered during operations in the real world, for example, in a wearable sensor. The metallic nanoislands are grown on graphene through thermal deposition of metals (gold or palladium) at a low nominal thickness. Metallic films exhibit an increase in resistance with temperature (positive TCR), whereas graphene exhibits a decrease in resistance with temperature (negative TCR). By varying the am

SUBMITTER: Marin BC 

PROVIDER: S-EPMC5331455 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature