The present invention provides a sensing device for detecting an analyte containing a non-metallic element such as F. A working sensor has a 3D array of voids each having a void internal wall. The void internal walls have cavities each having a cavity internal wall made from a material containing the non-metallic element. A binding of the analytes to the cavities induces a detectable variation of the optical property of the 3D array of voids. The invention exhibits numerous technical merits such as high sensitivity, high specificity, fast detection, ease of operation, low power consumption, zero chemical release, and low operation cost, among others.

The present invention provides a novel and efficient process of preparing a highly organized 3D array of particles by stacking multiple 2D arrays of the particles. The 3D array of particles so prepared is used in fabrication of sensors, such as molecular imprinted photonic (MIP) crystal sensor. The sensor has a 3D array of voids each having a void internal wall. The void internal walls have cavities each having a cavity internal wall made from a material containing the non-metallic element. A binding of the analytes to the cavities induces a detectable variation of the optical property of the 3D array of voids. The invention exhibits numerous technical merits such as high sensitivity, high specificity, fast detection, ease of operation, low power consumption, zero chemical release, and low operation cost, among others.

A photonic crystal structure employs such a structure that two layers having different refractive indices are laminated alternately, a polymer including a structure unit derived from a monomer that contains a fluorocarbon group being used for one of the repeated layers such that the photonic crystal structure can respond to humidity and/or organic solvent concentration. Using the photonic crystal structure, it is possible to manufacture a color-conversion photonic crystal sensor having excellent sensitivity and reproduction characteristics.

A sensor can include a nanostructure in a housing configured to contact a sample.

Embodiments of the present disclosure generally relate to apparatus and methods for analyte detection. More specifically, embodiments of the present disclosure relate to a microscale biosensing platform based upon the rehydration-mediated swelling of functionalized hydrogel structures and rapid capture of target analyte(s) by induced convective flow. In an embodiment is provided an apparatus for analyte detection that includes a fluidic channel coupled to a substrate and a hydrogel structure coupled to the fluidic channel. The hydrogel structure includes one or more surface-functionalized hydrogel features, wherein at least one of the one or more surface-functionalized hydrogel features comprises a chemically-bound probe, the chemically-bound probe to bind an analyte, and wherein the hydrogel structure is at least partially dehydrated. Apparatus described herein can also include a detector. Methods of detecting analytes are also described herein.

The present disclosure provide a gas monitoring device, a gas monitoring system, a gas monitoring method, a cabinet, and a computer readable storage medium. The gas monitoring device includes: a tubular housing, a light transmission module arranged at one end of the tubular housing, and a gas detecting module arranged at the other end of the tubular housing, in which a first end surface of the light transmission module, a second end surface of the gas detecting module and the tubular housing form a cavity, and the first end surface and the second end surface are parallel to each other; the light transmission module is configured to input incident light to the cavity, and the gas detecting module is configured to adjust a distance between the second end surface and the first end surface according to a concentration of the gas to be detected.

A scour monitoring system may provide a housing that is separated into multiple segments that are fluidically isolated from each other. The scour monitoring system may be position adjacent to a structure to be monitored for bridge scouring. Each of the segments may provide a water-swellable material positioned near or in contact with a fiber Bragg grating (FBG) cable. If water penetrates a segment, the water-swellable material may expand to deform the FBG cable. The wavelength of the FBG cable may be monitored periodically for changes, thereby providing moisture detection when a change in wavelength is detected.

Disclosed herein are a hydrogel bead, a chemical sensor including the same, and an electronic product including the chemical sensor. The hydrogel bead includes at least one type of polysaccharide physically crosslinked with a cation or an anion, and a pH indicator dye.

The present disclosure provide a gas monitoring device, a gas monitoring system, a gas monitoring method, a cabinet, and a computer readable storage medium. The gas monitoring device includes: a tubular housing, a light transmission module arranged at one end of the tubular housing, and a gas detecting module arranged at the other end of the tubular housing, in which a first end surface of the light transmission module, a second end surface of the gas detecting module and the tubular housing form a cavity, and the first end surface and the second end surface are parallel to each other; the light transmission module is configured to input incident light to the cavity, and the gas detecting module is configured to adjust a distance between the second end surface and the first end surface according to a concentration of the gas to be detected.

A photonic crystal structure employs such a structure that two layers having different refractive indices are laminated alternately, a polymer including a structure unit derived from a monomer that contains a fluorocarbon group being used for one of the repeated layers such that the photonic crystal structure can respond to humidity and/or organic solvent concentration. Using the photonic crystal structure, it is possible to manufacture a color-conversion photonic crystal sensor having excellent sensitivity and reproduction characteristics.