A method of synthesis of two-dimensional (2D) nanoflakes comprises the cutting of prefabricated nanoparticles. The method allows high control over the shape, size and composition of the 2D nanoflakes, and can be used to produce material with uniform properties in large quantities. Van der Waals heterostructure devices are prepared by fabricating nanoparticles, chemically cutting the nanoparticles to form nanoflakes, dispersing the nanoflakes in a solvent to form an ink, and depositing the ink to form a thin film.

The present invention is directed to methods of preparing metal sulfide, metal selenide, or metal sulfide/selenide nanoparticles and the products derived therefrom. In various embodiments, the nanoparticles are derived from the reaction between precursor metal salts and certain sulfur- and/or selenium-containing precursors each independently having a structure of Formula (I), (II), or (III), or an isomer, salt, or tautomer thereof, where Q.sup.1,Q.sup.2,Q.sup.3,R.sup.1,R.sup.2,R.sup.3,R.sup.5, and X are defined within the specification.

The present disclosure relates to a composition that includes a particle and a surface species, where the particle has a characteristic length between greater than zero nm and 100 nm inclusively, and the surface species is associated with a surface of the particle such that the particle maintains a crystalline form when the composition is at a temperature between −180° C. and 150° C.

The present invention provides a curable composition containing semiconductor nanoparticles, which contains luminescent semiconductor nanoparticles having good dispersibility and has low viscosity and excellent formability. Al curable composition containing semiconductor nanoparticles, contains: a monofunctional (meth)acrylate compound (a) having a tricyclodecane structure; at least one compound (h) selected from among (meth)acrylate compounds (b1) having two or more (meth)acryloyloxy groups and compounds (b2) represented by formula (1); a polymerization initiator (c); and luminescent semiconductor nanoparticles (d). H.sub.2C═C(R.sup.1)—CH.sub.2—O—CH.sub.2—C(R.sup.2)═CH.sub.2 (1) (In formula (1). R.sup.1 and R.sup.2 each independently represent a hydrogen atom,an alkyl group having 1 to 4 carbon atoms, or an organic group having 4 to 10 carbon atoms having an ester bond)

There is provided a semiconductor nanocrystal or quantum dot comprising a core made of a material and at least one shell made of another material. Also there is provided a composite comprising a plurality of such nanocrystals or quantum dots. Moreover, there is provided a method of measuring the temperature of an object or area, comprising using a temperature sensor comprising a semiconductor nanocrystal or quantum dot of the invention.

An LED driving device includes a converter module configured to receive an input voltage and generate an output voltage for driving a plurality of LEDs. A surge protection module is electrically connected to the converter module. A case holds the converter module and the surge protection module, and provides electrical coupling therebetween.

A preservation method of a quantum dot and a quantum dot composition are provided. The method includes the following steps. A quantum dot is mixed with a preservative to form a quantum dot composition, wherein the preservative is a long-chain unsaturated compound, and based on the total weight of the quantum dot composition, the content of the quantum dot is 5 wt % to 80 wt %, and the content of the preservative is 20 wt % to 95 wt %. The quantum dot composition is sealed for preservation.

A methodology for synthesizing a nanoparticle batch, such as but not limited to a metal chalcogenide nanoparticle batch and further such as but not limited to a metal sulfide nanoparticle batch is predicated upon an expectation and observation that at elevated concentrations of at least one reactant material within a heat-up nanoparticle batch synthesis method, the resulting nucleated batch comprises nanoparticles that may be dimensionally focused to provide a substantially monodisperse nanoparticle batch. The embodied methodology is also applicable to a continuous reactor. The embodied methodology also considers viscosity as a dimensionally focusing result effective variable.

A nanocrystal particle including at least one semiconductor material and at least one halogen element, the nanocrystal particle including: a core comprising a first semiconductor nanocrystal; and a shell surrounding the core and comprising a crystalline or amorphous material, wherein the halogen element is present as being doped therein or as a metal halide.

A nanocrystal particle including at least one semiconductor material and at least one halogen element, the nanocrystal particle including: a core comprising a first semiconductor nanocrystal; and a shell surrounding the core and comprising a crystalline or amorphous material, wherein the halogen element is present as being doped therein or as a metal halide