A gas sensor includes: a first conductive layer; a second conductive layer including a first region having a first thickness and a second region having a second thickness larger than the first thickness; a metal oxide layer disposed between the first conductive layer and the second conductive layer, the metal oxide layer including a bulk region and a local region surrounded by the bulk region, a degree of oxygen deficiency of the local region being higher than that of the bulk region; and an insulation layer covering the first conductive layer, the second region of the second conductive layer, and the metal oxide layer and not covering the first region of the second conductive layer.

A method and composition of matter for detecting and decontaminating hazardous chemicals, the composition of matter including: a magnetic material for any of chemisorbing, molecularly dissociating, or decomposing a hazardous chemical, wherein the magnetic material changes its magnetic moment upon any of chemisorption, decomposition, and molecular dissociation of the hazardous chemical and the change in magnetic moment is used to detect the presence of the hazardous chemical, and wherein the hazardous chemical includes any of toxic industrial chemicals, chemical warfare agents, and chemical warfare agent related compounds.

A core-shell structure (a diameter is about 5 nm) is located on an Al.sub.2O.sub.3 catalyst support. Platinum (Pt metal) is a core, and a shell that surrounds the core has a solid solution structure (A.sub.1-xB.sub.xO.sub.Y) (where X is a composition that composes A and B, and Y is a composition of oxygen (O)) that is composed of platinum, palladium, and oxygen.

A hydrogen sensor includes: a first electrode; a second electrode; a metal oxide layer disposed between the first electrode and the second electrode and including a bulk area and a local area; a first insulation film covering the first electrode, the second electrode, and the metal oxide layer and having an opening reaching the second electrode; and a second insulation film being in contact with the second electrode in the opening.

The present invention relates to a gas sensor package including an insulating substrate, a metal layer on one surface of the insulating substrate, a stepped portion disposed on the metal layer and configured to divide the metal layer into a plurality of portions, and a gas sensor chip mounted on the metal layer located on the stepped portion and including a sensing part, wherein a width of the stepped portion is provided to be equal to or less than an interval between two adjacent electrode terminals of a plurality of electrode terminals of the gas sensor chip.

A mobile device having a gas-sensing function including a case body, a backlight module and a gas sensor is provided. The case body has at least one through hole. The backlight module is disposed in the case body. The gas sensor is disposed in the case body. The gas sensor includes a gas-sensing material layer for sensing a gas. The gas-sensing material layer receives a visible light emitted from the backlight module and is activated by the visible light.

A gas sensor includes a base, an insulating layer, two sensing electrodes, a heating layer, a gas-sensing material, and an exciting light source. A thru-hole is formed on the base, the insulating layer is disposed on the base to cover the thru-hole, and a portion of the insulating layer corresponding to the thru-hole is defined as an element area. Each sensing electrode disposed on the insulating layer has a sensing segment disposed on the element area and a sensing pad disposed outside the element area. The heating layer disposed on the insulating layer has a heating segment disposed on the element area and two heating pads disposed outside the element area. The gas-sensing material is disposed on the element area and covers the sensing segments and the heating segment. The exciting light source is arranged in the thru-hole and is configured to emit light toward the gas-sensing material.

An atomic level deposition for mass functionalization of a cavity filled with a pathogen sensitive antibody reagent to functionalize each Biosensor using atomic level vapor phase deposition enables high volume production of this sensor technology. A biosensor has a first substrate and a second substrate with a cavity formed in the first substrate to form a membrane. Holes is formed through the second substrate. An aluminum oxide layer is formed over the cavity and into the holes to form cores. The cavity is filled with a pathogen sensitive antibody reagent. A biofluid sample with the pathogen is deposited over the membrane. The biofluid is drawn through the cores to mix with the antibody reagent. The antibodies combine with the pathogen to change the impedance along the current path. The presence of the pathogen changes the ionic current flow through the biosensor for a positive detection of the pathogen.

The present invention provides a vapor-permeable flexible sensing platform unit comprising: a first porous membrane, wherein said membrane is substantially flexible and hydrophobic; and a volatile organic compounds (VOCs) sensor disposed on said membrane, the VOCs sensor comprising an electrode array and a conducting polymer porous film being in electric contact with said electrode array, wherein the VOCs sensor is insensitive to lateral strain. Further provided are a method of preparation of said platform unit and a lift-off, float-on (LOFO) method for the preparation of protonically doped polyaniline (PANI) thin films.

A gas sensor comprises a support structure with a cavity (6), a sensing element (1) sensitive to a gas and arranged in the cavity (6), and a filter (3) spanning the cavity (6). The filter (3) is a size selective filter.