Abstract: The present disclosure relates to down-shifting nanophosphors, a method for preparing the same, and a luminescent solar concentrator (LSC) using the same. The down-shifting nanophosphors according to an embodiment of the present disclosure include a core including NaYF4 nanocrystals doped with neodymium (Nd) and ytterbium (Yb), and further include a neodymium (Nd)-doped crystalline shell surrounding the core, or further include a NaYF4 crystalline shell surrounding the crystalline shell. Therefore, the down-shifting nanophosphors efficiently absorb near infrared rays with a wavelength range of 700-900 nm and efficiently emit near infrared rays with a wavelength range of 950-1050 nm. In addition, the down-shifting nanophosphors according to an embodiment of the present disclosure has a size of 60 nm or less, and thus can be applied to manufacture transparent LSC films with ease and can realize transparent solar cell modules having high near infrared ray shifting efficiency.

Abstract: Provided is a core/multishell tetragonal upconversion nanophosphor capable of being excited by near-infrared (NIR) light having wavelengths of 800±20 nm, 980±20 nm, and 1532±20 nm to emit light of blue, green, red, and combinations thereof.

Abstract: The present invention relates to low-calorie hot sauces, and more particularly, to hot sauces containing hot spices, acid-resistant thickeners and low-calorie or calorie-free saccharides.

Abstract: A pretreatment method for analyzing dioxin compounds and an analytical method using the same, in which a column packed with polymer beads that are capable of selectively adsorbing dioxin compounds is used in a purification step during pretreatment, thereby remarkably reducing a time required for pretreatment and improving a recovery rate of an internal standard for purification, are provided.

Abstract: Provided is a core/multishell tetragonal upconversion nanophosphor capable of being excited by near-infrared (NIR) light having wavelengths of 800±20 nm, 980±20 nm, and 1532±20 nm to emit light of blue, green, red, and combinations thereof.

Abstract: Provided is a fluoride nanophosphor using, as cores, luminescent nanoparticles expressed by Chemical Formula 1. LiEr1-x-yLyF4:Tm3+x??[Chemical Formula 1] (In Chemical Formula 1, x is a real number satisfying 0?x?0.3, y is a real number satisfying 0?y?0.8 and is selected within a range satisfying 0?x+y?0.9, and L is any one selected from the group consisting of yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), ytterbium (Yb), lutetium (Lu), and a combination thereof.

Abstract: The present disclosure relates to down-shifting nanophosphors, a method for preparing the same, and a luminescent solar concentrator (LSC) using the same. The down-shifting nanophosphors according to an embodiment of the present disclosure include a core including NaYF4 nanocrystals doped with neodymium (Nd) and ytterbium (Yb), and further include a neodymium (Nd)-doped crystalline shell surrounding the core, or further include a NaYF4 crystalline shell surrounding the crystalline shell. Therefore, the down-shifting nanophosphors efficiently absorb near infrared rays with a wavelength range of 700-900 nm and efficiently emit near infrared rays with a wavelength range of 950-1050 nm. In addition, the down-shifting nanophosphors according to an embodiment of the present disclosure has a size of 60 nm or less, and thus can be applied to manufacture transparent LSC films with ease and can realize transparent solar cell modules having high near infrared ray shifting efficiency.

Abstract: Provided is a dye-sensitized upconversion nanophosphor including a core, a first shell surrounding at least part of the core, and an organic dye bonded to a surface of the nanophosphor which has an absorption band ranging from 650 nm to 850 nm and which is excited in a near-infrared region to emit visible light. The dye-sensitized upconversion nanophosphor may be included in a display apparatus, a fluorescent contrast agent, or an anti-counterfeiting code. The organic dye may be an IR-808 dye.

Abstract: First and second mask layers are formed on a target layer. The second mask layer is patterned to form second mask patterns each of which having a rhomboid shape with a first diagonal length and a second diagonal length. A trimming process is performed on the second mask patterns to form second masks by etch. First portions of first opposite vertices of each second mask pattern are etched more than second portions of second opposite vertices of each second mask pattern. A first diagonal length between the first opposite vertices is greater than a second diagonal length between the second opposite vertices. The first mask layer is patterned to form first masks by etching the first mask layer using the second masks as an etching mask. The target layer is patterned to form target patterns by etching the target layer using the first masks as an etching mask.

Abstract: The present invention relates to low-calorie hot sauces, and more particularly, to hot sauces containing hot spices, acid-resistant thickeners and low-calorie or calorie-free saccharides.

Abstract: A cooling device for surveillance system includes: an outer housing surrounding a surveillance camera; and a blower positioned on an outer surface of the outer housing and configured to generate cooling air flowing along the outer surface of the outer housing.

Abstract: Provided is a fluoride nanophosphor using, as cores, luminescent nanoparticles expressed by Chemical Formula 1. LiEr1-x-yLyF4:Tm3+x??[Chemical Formula 1] (In Chemical Formula 1, x is a real number satisfying 0?x?0.3, y is a real number satisfying 0?y?0.8 and is selected within a range satisfying 0?x+y?0.9, and L is any one selected from the group consisting of yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), ytterbium (Yb), lutetium (Lu), and a combination thereof.

Abstract: First and second mask layers are formed on a target layer. The second mask layer is patterned to form second mask patterns each of which having a rhomboid shape with a first diagonal length and a second diagonal length. A trimming process is performed on the second mask patterns to form second masks by etch. First portions of first opposite vertices of each second mask pattern are etched more than second portions of second opposite vertices of each second mask pattern. A first diagonal length between the first opposite vertices is greater than a second diagonal length between the second opposite vertices. The first mask layer is patterned to form first masks by etching the first mask layer using the second masks as an etching mask. The target layer is patterned to form target patterns by etching the target layer using the first masks as an etching mask.

Abstract: Provided is a dye-sensitized upconversion nanophosphor including a core, a first shell surrounding at least part of the core, and an organic dye bonded to a surface of the nanophosphor to have an absorption band ranging from 650 nm to 850 nm and be excited in a near-infrared region to emit visible light.

Abstract: A cooling device for surveillance system includes: an outer housing surrounding a surveillance camera; and a blower positioned on an outer surface of the outer housing and configured to generate cooling air flowing along the outer surface of the outer housing.

Abstract: A pretreatment method for analyzing dioxin compounds and an analytical method using the same, in which a column packed with polymer beads that are capable of selectively adsorbing dioxin compounds is used in a purification step during pretreatment, thereby remarkably reducing a time required for pretreatment and improving a recovery rate of an internal standard for purification, are provided.

Abstract: Provided is a nanophosphor having a core/double shell structure, the nanophosphor including a upconversion core including a Yb3+, Ho3+, and Ce3+? co-doped fluoride-based nanophosphor represented by Formula 1; a first shell surrounding at least a portion of the upconversion core, and comprising a Nd3+ and Yb3+ co-doped fluoride-based crystalline composition represented by Formula 2; and a second shell surrounding at least a portion of the first shell, and having paramagnetic properties represented by Formula 3.

Abstract: Provided is a nanophosphor having a core/double shell structure, the nanophosphor including a upconversion core including a Yb3+, Ho3+, and Ce3+? co-doped fluoride-based nanophosphor represented by Formula 1; a first shell surrounding at least a portion of the upconversion core, and comprising a Nd3+ and Yb3+ co-doped fluoride-based crystalline composition represented by Formula 2; and a second shell surrounding at least a portion of the first shell, and having paramagnetic properties represented by Formula 3.

Abstract: The present invention provides a liquid crystal composition having easily adjustable rotational viscosity while maintaining stability at low temperature, a clearing point and dielectric anisotropy (positive value) in an optimal condition according to an exemplary embodiment of the present invention, including: at least one liquid crystal compound selected from the group consisting of liquid crystal compounds represented by the following Chemical Formula 1, as a first component; at least one liquid crystal compound selected from the group consisting of liquid crystal compounds represented by the following Chemical Formula 2, as a second component; and at least one liquid crystal compound selected from the group consisting of liquid crystal compounds represented by the following Chemical Formula 3, as a third component.

Abstract: Disclosed therein are an optical film and a display device comprising the same, where the optical film comprises a first optically anisotropic layer including a liquid crystal compound and a second optically anisotropic layer including a photoreactive polymer, thereby securing improved photoreaction rate and excellent liquid crystal alignment.