Synthesizing upconverting nanoparticles includes heating a precursor solution comprising one or more rare earth salts, an alkali metal salt or alkaline earth salt, and a solvent comprising a plasticizer in a microwave reactor to yield a product mixture, and cooling the product mixture to yield the upconverting nanoparticles. Core-shell upconverting nanoparticles are synthesized by combining the upconverting nanoparticles with a precursor solution comprising one or more rare earth salts, an alkali metal salt or alkaline earth salt, and a solvent comprising a plasticizer to yield a nanoparticle mixture, heating the nanoparticle mixture in a microwave reactor to yield a product mixture, and cooling the product mixture to yield the core-shell upconverting nanoparticles.

Described are lithium transition metal halides which have ionic conductivity for lithium ions, a process for preparing them, their use as a solid electrolyte for an electrochemical cell, and electrochemical cells comprising lithium transition metal halides.

Described are lithium transition metal halides which have ionic conductivity for lithium ions, a process for preparing them, their use as a solid electrolyte for an electrochemical cell, and electrochemical cells comprising lithium transition metal halides.

Provided is a solid electrolyte material comprising Li, Y, Br, and I, wherein in an X-ray diffraction pattern in which Cu-Kα is used as a radiation source, peaks are present within all ranges of diffraction angles 2θ of 12.5° to 14.0°, 25.0° to 27.8°, 29.2° to 32.3°, 41.9° to 46.2°, 49.5° to 54.7°, and 51.9° to 57.5°.

Provided is a solid electrolyte material comprising Li, Y, Br, and I, wherein in an X-ray diffraction pattern in which Cu-Kα is used as a radiation source, peaks are present within all ranges of diffraction angles 2θ of 12.5° to 14.0°, 25.0° to 27.8°, 29.2° to 32.3°, 41.9° to 46.2°, 49.5° to 54.7°, and 51.9° to 57.5°.

A solid electrolyte material according to an aspect of the present disclosure is represented by the following Compositional Formula (1):
Li.sub.6-3zY.sub.zX.sub.6
where, 0<z<2 is satisfied; and X represents Cl or Br.

A solid electrolyte material according to an aspect of the present disclosure is represented by the following Compositional Formula (1):
Li.sub.6-3zY.sub.zX.sub.6
where, 0<z<2 is satisfied; and X represents Cl or Br.

Monodisperse particles having: a single pure crystalline phase of a rare earth-containing lattice, a uniform three-dimensional size, and a uniform polyhedral morphology are disclosed. Due to their uniform size and shape, the monodisperse particles self assemble into superlattices. The particles may be luminescent particles such as down-converting phosphor particles and up-converting phosphors. The monodisperse particles of the invention have a rare earth-containing lattice which in one embodiment may be an yttrium-containing lattice or in another may be a lanthanide-containing lattice. The monodisperse particles may have different optical properties based on their composition, their size, and/or their morphology (or shape). Also disclosed is a combination of at least two types of monodisperse particles, where each type is a plurality of monodisperse particles having a single pure crystalline phase of a rare earth-containing lattice, a uniform three-dimensional size, and a uniform polyhedral morphology; and where the types of monodisperse particles differ from one another by composition, by size, or by morphology. In a preferred embodiment, the types of monodisperse particles have the same composition but different morphologies. Methods of making and methods of using the monodisperse particles are disclosed.

New methods and assays for multiplexed detection of analytes using phosphors that are uniform in morphology, size, and composition based on their unique optical lifetime signatures are described herein. The described assays and methods can be used for imaging or detection of multiple unique chemical or biological markers simultaneously in a single assay readout.

New methods and assays for multiplexed detection of analytes using phosphors that are uniform in morphology, size, and composition based on their unique optical lifetime signatures are described herein. The described assays and methods can be used for imaging or detection of multiple unique chemical or biological markers simultaneously in a single assay readout.