Wacker oxidation can be used as a signal transduction mechanism for the selective and sensitive detection of ethylene in air via chemiresistive sensing. Using this system, the senescence of lisianthus flowers and carnations can be monitored.

An electronic device for sensing a target analyte in a gas, liquid or vapor sample, the device has at least two sensing elements, each sensing element having an exposed layer of a transduction material supported on a dielectric substrate. The dielectric substrate of at least one of the sensing elements is made of a different dielectric material than the dielectric substrate of at least one other of the sensing elements. The different dielectric materials providing a different sensing response according to one or more transduction modes. The plurality of sensing elements in the device yield a specific transduction pattern for a specific target analyte in a gas, liquid or vapor sample.

A gas sensor comprises a basic part and a sensing layer deposited on the basic part. The basic part includes a circuit board and at least one surface acoustic wave element disposed on the circuit board. The sensing layer is a nanocomposite film of reduced graphene oxide/tungsten oxide/polypyrrole deposited on the surface acoustic wave element. The sensing layer combines reduced graphene oxide, metal oxide, and conductive polymer, so that the sensing layer is able to perform sensing at room temperature, and can be more sensitive. The present invention provides a method for manufacturing a gas sensor, and a gas sensing system including the gas sensor.

A gas sensor configured to detect a target gas in a gaseous atmosphere, for example NO.sub.2 or O.sub.3 in air, comprises: a transparent substrate; a gas sensitive detection layer supported by the transparent substrate, the gas sensitive detection layer comprising i) a gas sensitive detection material having an electrical impedance which is sensitive to the target gas and ii) connections configured to allow for detection of electrical impedance of the gas sensitive detection material; and a light source, for example a LED, configured to provide light to the gas sensitive detection layer through the transparent substrate. The gas sensor may operate at room temperature whilst requiring little power.

A sensing element includes a conductive substrate, a zinc oxide seed layer, a plurality of zinc oxide nanorods, a film with an electrical double layer, and an organic sensing layer. The zinc oxide seed layer is located on the conductive substrate. The zinc oxide nanorods extend from the zinc oxide seed layer. The film with the electrical double layer covers the zinc oxide nanorods. The organic sensing layer is located on the film with the electrical double layer.

An allergen detection device that includes a sensor comprising a circuit board, an electropolymerized molecularly imprinted polymer film (MIP) that includes receptor sites imprinted in a first surface of the polymer, the receptor sites configured to accept a trace molecule of an allergen, and an electropolymerized non-imprinted polymer film. The sensor is configured to detect the presence of the trace molecule upon binding to one or more of the receptor sites on the MIP.

A sensor can include a catalyst.

The present invention is to provide a semiconductor element achieving a high-level detection sensitivity when utilized as a sensor. The present invention relates to a semiconductor element including an organic film, a first electrode, a second electrode, and a semiconductor layer, in which the first electrode, the second electrode and the semiconductor layer are formed on the organic film, the semiconductor layer is arranged between the first electrode and the second electrode, the semiconductor layer contains a carbon nanotube, and the organic film has a water contact angle of 5° or more and 50° or less.

[Problem to be Solved] A biosensor having high detection sensitivity and detection specificity is provided. [Solution] There is provided a biosensor comprising: an identification substance capable of binding to a substance to be detected; and an electrode charged with a charge of the identification substance, and detecting a change in a charge density of the electrode caused by binding of the substance to be detected to the identification substance, wherein a polymer layer in which a molecular template having a structure complementary to a molecular structure of the substance to be detected is formed is formed on all or part of a surface of the electrode, the identification substance is contained in the polymer layer, and the polymer layer is an ultrathin film layer.

A sensor for detecting non-hazardous and especially hazardous gases and/or vapors comprises a liquid crystal cell generally having a standard substrate and a conductive electrode layer thereon. An alignment layer is desirably located on the electrode layer and contains one or more types of metal nanoparticles that cover at least a portion of the alignment layer. The nanoparticles contain at least one type of ligand thereon that is capable of sensing a specific type of non-hazardous or hazardous gas. The sensor is very sensitive and can detect the gases or vapors contained within air, or the like, up to 1 part per million.