Abstract: An apparatus comprising: one or more cells, each cell comprising: a proton conductor region configured to conduct proton charge carriers; a electron conductor region configured to conduct electrons; a first electrode associated with one of the proton conductor region and the electron conductor region; and a second electrode associated with the other of the proton conductor region and the electron conductor region; a removable barrier layer that is impermeable to water vapor extending over and protecting the one or more cells from water vapor; and a buffer layer that is permeable to water vapor between the one or more cells and the barrier layer.

Abstract: Apparatus comprising an inlet region for receiving a gas mixture; an ionizer for supplying hydronium ions to the received gas mixture to generate ions, wherein the ionizer comprises a membrane for receiving the gas mixture, and wherein the membrane, preferably made of graphene oxide, is capable of generating hydronium ions from water; and an ion detector for detecting ions generated from the gas mixture.

Abstract: An apparatus and method, the apparatus comprising: at least one charged substrate (3); a channel of two dimensional material (5); and at least one floating electrode (7A-C) wherein the floating electrode comprises a first area (10A-C) adjacent the at least one charged substrate, a second area (11A-C) adjacent the channel of two dimensional material and a conductive interconnection (9A-C) between the first area and the second area wherein the first area is larger than the second area and wherein the at least one floating electrode is arranged to control the level of doping within the channel of two dimensional material.

Abstract: An apparatus and method wherein the apparatus comprises: a sensing material configured to produce a non-random distribution of free charges in response to a parameter; an electric field sensor; a first conductive electrode comprising a first area over-lapping the sensing material; an insulator provided between the first conductive electrode and the sensing material; a second electrode comprising a second area adjacent the electric field sensor; and a conductive interconnection between the first conductive electrode and the second conductive electrode.

Abstract: An apparatus comprising: a first layer (512) configured to enable a flow of charge carriers from a source electrode (505) to a drain electrode (506); a second layer (513) configured to generate a voltage in response to a physical stimulus, the second layer (513) positioned so that the generated voltage can affect the conductance of the first layer (512); and a third layer (514) positioned between the first (512) and second (513) layers to prevent a flow of charge carriers therebetween. The third layer (514) comprises a material configured to form electric double-layers (516, 517) at the interfaces with the first (512) and second (513) layers in response to the generated voltage. The formation of the electric double-layers (516, 517) enhances the effect of the generated voltage on the conductance of the first layer (512) such that determination of the conductance of the first layer (512) can be used to allow the magnitude of the physical stimulus to be derived.

Abstract: A capacitive sensor electrode for sensing a touch input. A material is configured to temporarily modify a capacitance of the capacitive sensor electrode during a period after a touch input has occurred. After the touch input has occurred, a material change in capacitance of the material is relatively slower than an electrode change in capacitance of the capacitive sensor electrode.

Abstract: An apparatus comprising a plurality of first elongate electrodes (101) separated from a plurality of second transversely oriented elongate electrodes (102) by an electrolyte (103), the plurality of transversely oriented first (101) and second (102) electrodes forming an array of respective electrochemical sensor nodes at the spaced crossings thereof, wherein the first electrodes (101) are configured such that the interaction of an analyte with the first electrode (101) at a sensor node affects an electrical property of the sensor node, and wherein the apparatus comprises respective terminals connected to each electrode (101, 102) for electrical connection to a measurement circuit to enable determination of the presence and/or amount of analyte at a particular sensor node based on a measurement of the electrical property of that sensor node.

Abstract: An apparatus comprising first and second electrodes (201, 202) separated by an electrolyte (203), the first and second electrodes (201, 202) configured to exhibit a potential difference therebetween on interaction of the first electrode (201) with an analyte, wherein the first electrode (201) is configured such that its electrical conductance and electrochemical potential are dependent upon the amount of analyte present, the electrical conductance and electrochemical potential of the first electrode (201) affecting the potential difference between the first and second electrodes (201, 202), and wherein the apparatus comprises respective first and second terminals (204, 205) configured for electrical connection to a readout circuit to enable determination of the presence and/or amount of analyte based on the potential difference.

Abstract: An apparatus for use in determining the relative vapour pressure of a fluid in an environment in which the apparatus is located, the apparatus comprising a first layer (512) configured to enable a flow of charge carriers from a source electrode (505) to a drain electrode (506), a second layer (513) configured to control the conductance of the first layer (512) using an electric field formed between the first (512) and second layers (513) and a third layer (514) positioned between the first and second layers to prevent a flow of charge carriers therebetween to enable formation of the electric field, wherein the second layer (513) is configured to exhibit a charge distribution on interaction with the fluid, the charge distribution giving rise to the electric field between the first and second (513) layers, and wherein the second layer (513) is configured such that the charge distribution and electric field strength are dependent upon the relative vapour pressure of the fluid in the environment (516), thereby al

Abstract: An apparatus, method and computer program where the apparatus comprises: a plurality of sensors (3, 5) configured to detect a physiological parameter: wherein at least one first (5) sensor is configured to have a first sensitivity to the physiological parameter and at least one second sensor (3) is configured to have a second sensitivity to the physiological parameter; such that a parameter profile, comprising a plurality of measurements of the physiological parameter at different is provided by the apparatus.

Abstract: An apparatus comprising: a capacitive sensor electrode; and material configured to temporarily modify a capacitance of the capacitive sensor electrode during a period after a touch input has occurred.