Abstract:
An apparatus comprising:, a first layer configured to enable a flow of charge carriers from a source electrode to a drain electrode, a second layer configured to control the density of charge carriers in the first layer using an electric field formed between the first and second layers, and a third layer positioned between the first and second layers to shield the first layer from the electric field, wherein the third layer comprises a layer of electrically conducting nanoparticles and is configured such that when stress is applied to the third layer, the strength of the electric field experienced by the first layer is varied resulting in a change in the charge carrier density and a corresponding change in the conductance of the first layer.
Abstract:
An apparatus comprising: a first sensor comprising a sensing material that is sensitive to a first parameter and a second parameter, wherein sensitivity to the first parameter changes sensitivity to the second parameter. The sensitivity of the first sensor to one of the first and the second parameters may be controlled by maintaining, as a constant, the other of the first and the second parameters. The apparatus may comprise a second sensor sensitive to at least one of the first parameter and the second parameter. The first parameter may be deformation and the second parameter may be a concentration of a gaseous analyte such as, for example, humidity. The second sensor may comprise the sensing material that is sensitive to the first parameter and the second parameter.
Abstract:
A method comprising: providing graphene on a growth substrate; providing a target substrate on the graphene to form a first composite comprising the target substrate and graphene; and removing at least a portion of the first composite from the growth substrate.