A resin particle includes a fluorescent colorant and a binder resin. The fluorescent colorant is bound to the binder resin by a chemical bond.

Fluorescent latexes are provided. In embodiments, a fluorescent latex comprises water and fluorescent agent-incorporated resin particles, the particles comprising a resin and a Förster Resonance Energy Transfer (FRET) pair comprising a fluorescent brightener having a fluorescence emission spectrum and a fluorescent dye having an absorption spectrum that overlaps with the fluorescence emission spectrum of the fluorescent brightener, wherein the fluorescent latex exhibits FRET under illumination with ultraviolet (UV) light. Fluorescent toners made from the fluorescent latexes are provided. Methods of making and using the fluorescent toners are also provided.

Novel compounds in the classes of Imidazo[1,2-α]pyrazines and Imidazo[1,2-α]quinoxalines with a methoxy group modification show unique spectral properties when used as a substrate for luciferases and photo-proteins. Methoxy e-Coelenterazine, an Imidazo[1,2-α] quinoxaline shifts the emission wavelength by 80 nm to blue light compared to e-Coelenterazine, using Renilla reniformis luciferase. The novel analogues described here are useful in combination with fluorescent proteins to create BRET (bioluminescent resonance energy transfer) and for other luminescent assays. In addition these novel compounds can be used to enhance, dazzle, amaze, startle, and otherwise entertain an audience by their direct application on to the audience, surroundings, the actors, or sprayed on settings as in the newer 4D movies.

Disclosed herein is a scintillator for use in an x-ray backscattering system. The scintillator comprises an inorganic scintillator portion made of inorganic scintillating material and comprising one or more inorganic material elements. Each inorganic material element of the one or more inorganic material elements comprises an outer surface, and an inner surface opposite the outer surface. The outer surface is configured to be proximate to a subject to be scanned, such that the outer surface is configured to receive x-ray photons scattered by the subject. The scintillator also comprises an organic scintillator portion made of an organic scintillating material and comprising a front surface. At least a portion of the front surface abuts the inner surface of at least one of the one or more inorganic material elements.

This invention discloses how EC devices can be fabricated as tags or labels; and further the materials used, device structures and how these can be processed by printing technologies. In addition, systems using displays of such EC devices and their integration with other components are described for forming labels and tags, etc, that may be actuated wirelessly or powered with low voltage and low capacity batteries.

Methods of making luminescent perovskite-polymer composites are provided and structures using the same. Perovskite-polymer composites made by the method described herein are provided. The perovskite-polymer composite is useful in many applications including downconverters for backlight units (BLU) of liquid crystal displays (LCDs), as well as for and could be used for light emitting devices, lasers or as active absorber or passive luminescent concentrators for solar photovoltaic applications.

Disclosed herein is a scintillator for use in an x-ray backscattering system. The scintillator comprises an inorganic scintillator portion made of inorganic scintillating material and comprising one or more inorganic material elements. Each inorganic material element of the one or more inorganic material elements comprises an outer surface, and an inner surface opposite the outer surface. The outer surface is configured to be proximate to a subject to be scanned, such that the outer surface is configured to receive x-ray photons scattered by the subject. The scintillator also comprises an organic scintillator portion made of an organic scintillating material and comprising a front surface. At least a portion of the front surface abuts the inner surface of at least one of the one or more inorganic material elements.

A method for preparing a ratiometric fluorescent sensor for phycoerythrin based on a magnetic molecularly imprinted core-shell polymer is provided. With Fe.sub.3O.sub.4 magnetic nanoparticles as the core, blue fluorescence-emitting carbon quantum dots (B-CDs) are coupled on the surfaces of Fe.sub.3O.sub.4 magnetic nanoparticles, and SiO.sub.2 shells carrying template molecules (phycoerythrin) are grown on the surfaces of Fe.sub.3O.sub.4/B-CDs. Then, the molecularly imprinted polymer SiO.sub.2-MIPs are obtained by eluting the template molecules, that is, Fe.sub.3O.sub.4/B-CDs/SiO.sub.2-MIPs are obtained. Fluorescence emission spectra of the dispersion of Fe.sub.3O.sub.4/B-CDs/SiO.sub.2-MIPs in the presence of different concentrations of phycoerythrin are measured. By fitting the linear relationship between the ratios I.sub.phycoerythrin/I.sub.B-CDs of fluorescence emission peak intensities of phycoerythrin and B-CDs and the molar concentrations of phycoerythrin, the ratiometric fluorescent sensor for phycoerythrin is constructed.

Organosilicon polymer foams are synthesized using a Carboni-Lindsey reaction of a tetrazine with a siloxane polymer having at least one of alkenyl or alkynyl functional groups. Optionally, the reaction may also comprise a second polymer having at least one of alkenyl or alkynyl functional groups. The organosilicon polymer foams may be crosslinked thermoset foams. The foams may be flexible or rubbery.

A method for preparing a ratiometric fluorescent sensor for phycoerythrin based on a magnetic molecularly imprinted core-shell polymer is provided. With Fe.sub.3O.sub.4 magnetic nanoparticles as the core, blue fluorescence-emitting carbon quantum dots (B-CDs) are coupled on the surfaces of Fe.sub.3O.sub.4 magnetic nanoparticles, and SiO.sub.2 shells carrying template molecules (phycoerythrin) are grown on the surfaces of Fe.sub.3O.sub.4/B-CDs. Then, the molecularly imprinted polymer SiO.sub.2-MIPs are obtained by eluting the template molecules, that is, Fe.sub.3O.sub.4/B-CDs/SiO.sub.2-MIPs are obtained. Fluorescence emission spectra of the dispersion of Fe.sub.3O.sub.4/B-CDs/SiO.sub.2-MIPs in the presence of different concentrations of phycoerythrin are measured. By fitting the linear relationship between the ratios I.sub.phycoerythrin/I.sub.B-CDs of fluorescence emission peak intensities of phycoerythrin and B-CDs and the molar concentrations of phycoerythrin, the ratiometric fluorescent sensor for phycoerythrin is constructed.