Abstract: Embodiments of the present invention relate to microphones diaphragms. In one embodiment, a sensor comprising a diaphragm comprised of a composition having a plurality of individual graphene sheets. An emitter formed in a manner to transmit lights towards a surface of the diaphragm. A collector that captures at least a portion of light that is reflected by the diaphragm. A converter is in communication with the detector that converts a signal that is generated by the sensor to a digital signal for processing. The graphene-based composition includes graphene sheets.

Abstract: Embodiments of the present invention relate to graphene-based capacitive sensors. In one embodiment, a touch sensor comprises a non-porous insulating substrate having a first side and a second side. A first conductive material is at least partially in communication with the first side. A second conductive material is at least partially in communication with the first side. A third conductive material is at least partially in communication with the second side. The first conductive material and the second conductive material are in communication. The first conductive material forms a linearization pattern. The first conductive material includes a metal. The second conductive material and/or third conductive material comprise graphene sheets.

Abstract: Electrical switches or sensors that comprise (a) a first electrical pole, (b) a layer of a variable resistance material in electrical contact with the first electrical pole, and (c) a second electrical pole that is in electrical contact with the variable resistance material and is not in electrical contact with the first pole, wherein the variable resistance material comprises at least one polymer having a glass transition temperature of no higher than about 10° C.

Abstract: Embodiments of the present invention relate to radio transponders and radio transponder antenna inlays. In an embodiment, a radio transponder comprises an integrated circuit having a memory unit. A printed antenna inlay is in electrical communication with the integrated circuit. The antenna inlay comprises a non-metallic conductive compound. The antenna inlay is non-ferromagnetic. The antenna inlay is radiolucent at wavelengths of at least 0.01 nm. The antenna inlay has a thickness of about 0.8 ?m to about 150 ?m.

Abstract: Embodiments of the present invention relate to graphene-based microphone diaphragms. In one embodiment, a acoustic wave sensor comprises a diaphragm comprised of a graphene-based composition, wherein the diaphragm has a first side at least partially covered with a reflective material. An emitter fiber is positioned proximate to the diaphragm, wherein the emitter fiber transmits light towards the first side. A collector fiber is positioned proximate to the diaphragm, wherein the collector fiber captures at least a portion of light reflected by the first side, wherein the collector fiber is in communication with a detector. A converter is in communication with the detector and converts a signal received by the detector to a digital signal for processing. The portion of light that is captured as a result of diaphragm distortion is different than the portion of light captured in the absence of diaphragm distortion. The graphene-based composition includes graphene sheets.

Abstract: Embodiments of the present invention relate to an electrically conductive composition and an article. The electrically conductive composition comprises a polymer, graphene sheets, and carbon black, wherein the ratio of the graphene sheets to carbon black is about 1:2 to about 1:20. An article comprising the electrically conductive composition.