Abstract:
The present disclosure provides a composite particle that includes: a fluorescent semiconductor core/shell nanoparticle (preferably, nanocrystal); and a stabilizing homo- or copolymer combined with the core/shell nanoparticle, the stabilizing (co)polymer comprising styrene monomer units and functionalized with phosphine, arsine or stibine groups.
Abstract:
Disclosed are quantum dots and quantum dot articles stabilized by a stabilizing agent of the formula: wherein each R1 is a hydrocarbyl group including alkyl, aryl, alkaryl and aralkyl; R2 is a divalent hydrocarbyl group selected from alkylene, arylene, alkarylene and aralkylene; Z is P, As or Sb; Q is —CH2—S—, —CH2—O—, —CO2—, —CH2—O—CO—, —CONR3—, —NH—CO—NR3—, and —NR3, where R3 is H or C1-C4 alkyl, subscript x is 1, R6 is a divalent hydrocarbyl group selected from alkylene, arylene, alkarylene and aralkylene, subscript y is 0 or 1, Rf is a perfluoroether group.
Abstract:
Optically clear curable adhesive films that are heat conformable prior to setting include a reactive composition. The curable films are flexible and free-standing, and have a complex viscosity of greater than 100,000 poise (10,000 Pascal seconds) at 25° C. and less than 100 poise (10 Pascal seconds) at 85° C., prior to setting. The set film has an adhesive shear strength of greater than 100 Newtons per square centimeter (N/cm2) to a glass substrate when measured according to the Shear Adhesion Test Method. The reactive composition includes an ethylenically unsaturated polyester-containing oligomeric composition that is the reaction product of a saturated, amorphous co-polyester polyol and a compound with a terminal polyol-reactive group and a terminal ethylenically unsaturated group, a (meth)acrylate functional material, and at least one initiator.
Abstract:
A vapor sensor comprises a sensor element (110), a cooling member (140), and an operating circuit (160). The sensor element comprises: a first conductive electrode; a second conductive electrode; and a dielectric microporous material at least partially disposed between and contacting the first and second conductive electrodes. The cooling member is in contact with, and configured to cool, the sensor element. The operating circuit is in electrical communication with the first and second conductive electrodes, and is capable of creating a voltage difference between the first and second conductive electrodes such that the sensor element has a capacitance-related property, and monitoring a capacitance-related property of the sensor element. A method of using the vapor sensor to detect an analyte vapor is also disclosed.
Abstract:
A sensor element includes first and second conductive electrodes that include interconnected carbon fibers. At least one or the first or second conductive electrodes is porous. The electrodes are separated by a porous dielectric detection layer including a sorbent material. Methods of making a sensor element and analyzing an analyte vapor are also disclosed.
Abstract:
A humidity sensor element includes a dielectric substrate, a nonporous conductive electrode disposed on the dielectric substrate, a permeable conductive electrode having a thickness in a range of from 4 to 10 nanometers and permeable by water vapor, and a detection layer disposed between the nonporous conductive electrode and the permeable conductive electrode. Both conductive electrodes have respective conductive leads attached thereto. The detection layer includes a sulfonated copolymer including monomeric units comprising (I) and (II), Wherein x and y are independently integers in the range of from 2 to 6, and wherein each M independently represents H or an alkali metal. A humidity sensor including the humidity sensor element is also disclosed.
Abstract:
The present disclosure provides a composite particle that includes: a fluorescent semiconductor core/shell nanoparticle (preferably, nanocrystal); and a stabilizing homo-copolymer combined with the core/shell nanoparticle, the stabilizing (co)polymer comprising styrene monomer units and functionalized with phosphine, arsine or stibine groups.
Abstract:
A vapor sensor comprises a housing with an inlet opening in fluid communication a sensor element within the housing. Standoff member(s) are positioned to maintain a gap between the inlet opening and a skin site. An operating circuit is in electrical communication with the sensor element and communicatively coupled to and output member. In use, the output member generates a sensory output indicative to an operator regarding concentration of alcoholic vapor in the ambient atmosphere proximate the skin site upon receiving communication from the operating circuit.
Abstract:
A portable device includes an outer housing including an inlet port and a outer slot adapted to receive a vapor sensor card; an operating circuit disposed at least partially within the outer housing; a sensor holder at least partially disposed within the outer housing. The sensor holder includes: an inner housing including a gas intake chamber in downstream fluid communication with the inlet port. The gas intake chamber has a gas outlet in fluid communication with an inner slot retaining a sensor card socket for engaging the vapor sensor card. The sensor holder further comprises an electrical heater element, a fan, and a turbulent-flow-inducing member. The vapor sensor card comprises a sensor housing and a capacitive sensor element.
Abstract:
A composite particle that includes: a fluorescent semiconductor core/shell nanoparticle (preferably, nanocrystal); and a stabilizing additive of the formula (I).