摘要:
A device for emission of electromagnetic radiation comprises a source of atomic particles and a collector disposed to receive atomic particles from the source. The collector comprises an emission medium, the medium comprising a crystal having a spatial dimension in the range from about 10 nanometers to about 50 micrometers, wherein the emission medium has the capability to generate opposing charge pairs upon absorption of atomic particles from the source and to emit electromagnetic radiation upon recombination of the pairs. The emission may be via spontaneous emission or, in certain embodiments, by stimulated emission. A laser assembly comprising this device, and methods for making the device are also presented herein.
摘要:
Embodiments of the invention include a particle detection system that includes a light emitting source, a non-collimating reflector, a collimating reflector, and a detector. Light from the light emitting source is directed by the non-collimating reflector to an area through which a particle stream may be transmitted. Fluorescent light from the light striking particles is redirected to the collimating reflector and then on to the detector. Other embodiments include a single pump used to pull a pair of fluid flows through the detection system. Other embodiments include a plurality of light emitting sources whose light is directed to a particle stream by a single reflector. Other embodiments include a method for detecting particles.
摘要:
An apparatus includes an article and a detector. The article includes a substrate, a faceted structure disposed on the substrate, and a sensor layer disposed on the faceted structure. The faceted structure is disposed on the substrate first surface and itself has a surface. The faceted structure surface has peripheral edge defining a diameter of the faceted structure surface. The sensor layer is disposed on the faceted structure surface. The sensor layer can react or can interact with a target species when the target species is sufficiently proximate to the sensor layer. The sensor layer responds to the reaction or to the interaction in a detectable manner. The detector detects a response to the reaction, or to the interaction, of the target species with the sensor layer.
摘要:
A faceted structure is provided that includes a crystalline composition comprising a metal nitride. The metal comprises one or more of aluminum, boron, indium, or gallium. The crystalline composition has at least one exposed surface that is a grain boundary, an etched surface, or a naturally formed facet, and the surface has the same crystallographic orientation of a substrate on which the crystalline composition is grown. A sensor device is provided that includes a faceted structure. Associated methods of making and using the faceted structure in a sensor device are provided.
摘要:
This invention provides a system for operating RFID tags on a single-use connector. The system includes: a first single-use connector configured to receive a first RFID tag and a second single-use connector configured to receive a second RFID tag. The invention also includes a reader placed close to the first RFID tag and the second RFID tag. The reader is configured to: determine if the first RFID tag and the second RFID tag are gamma sterilized; determine if the first RFID tag and the second RFID tag were previously used; determine if the first RFID tag and the second RFID tag are authentic; and determine if the first RFID tag matches with the second RFID tag.
摘要:
Total analysis systems and methods for simultaneously monitoring a suite of biological and/or chemical species in water and/or other process systems are disclosed. The system provides a sample-volume controlled sensor array comprising a fluid delivery device and a plurality of optical sensor elements for determining the presence and total concentrations of multiple analytes in the process system simultaneously. Delivery means are provided to deliver a metered quantity of sample fluid to the sensor array. Image identification algorithms are provided for identifying the analytes based on image intensity, color pattern, positional arrangement, and the like. The methods incorporate multivariate optimization algorithms to analyze multiple sensor responses. This produces analytical results that are typically difficult to obtain without full system or variable compensation. The improved array response may then be utilized to measure, monitor, and control the concentration of analytes in the chemical or biological sample or water system.
摘要:
Total analysis systems and methods for simultaneously monitoring a suite of biological and/or chemical species in water and/or other process systems are disclosed. The system provides a sample-volume controlled sensor array comprising a fluid delivery device and a plurality of optical sensor elements for determining the presence and total concentrations of multiple analytes in the process system simultaneously. Image identification algorithms are provided for identifying the analytes based on image intensity, color pattern, positional arrangement, and the like. The methods incorporate multivariate optimization algorithms to analyze multiple sensor responses. This produces analytical results that are typically difficult to obtain without full system or variable compensation. The improved array response may then be utilized to measure, monitor, and control the concentration of analytes in the chemical or biological sample or water system.
摘要:
A system that includes a device is provided in which the device includes a piezoelectric substrate; a sensor layer disposed on the substrate and operable to interact with, or react with, a target species; a first and a second electrode that are spaced from each other and in communication with the substrate; a first detector operable to detect the interaction or the reaction of the sensor layer with the target species based on a change in an optical characteristic of electromagnetic radiation propagated through the substrate; and a second detector operable to acoustically detect the interaction or the reaction of the sensor layer with the target species. Associated methods are provided.
摘要:
A method for making a microfluidic device comprises providing a processing substrate, forming a negative stamp on the processing substrate using a direct write process, disposing a coating material on the processing substrate, curing the coating material to produce a cured coating material, and separating the processing substrate and the negative stamp from the cured coating material, wherein a plurality of channels are formed in the cured coating material corresponding to a location of the negative stamp.
摘要:
An authenticatable article can comprise a polymer layer comprising a first taggant, and a second taggant disposed adjacent to the first taggant. The relative relationship of the first taggant and the second taggant can be such that at least one of the first taggant and the second taggant can cause an alteration in an emission from the other of the first taggant and the second taggant. One method of authenticating an article comprises illuminating an article and determining if an altered emission is within a selected emission range. The article comprises a polymer layer and a coating disposed on a side of the polymer layer. The polymer layer comprises a first taggant, and the coating causes a predetermined alteration in an emission from the taggant to form the altered emission.