Provided is a preparation method of near-infrared silver sulfide quantum dots. The silver sulfide quantum dots have hydrophilic groups derived from a mercapto-containing hydrophilic reagent attached on the surface thereof, and the hydrophilic reagent is any one of mercaptoacetic acid, mercaptopropionic acid, cysteine, cysteamine, thioctic acid and ammonium mercaptoacetate or any combination thereof. The silver sulfide quantum dots have high fluorescence yield, good fluorescence stability, good biocompatibility and uniform sizes. The preparation method has moderate reaction conditions, simple operation, short production cycle, good reproducibility and is easy to control. The silver sulfide quantum dots can be used in the application of cellular imaging and biological tissue imaging.

The present invention relates generally to compositions and methods of killing fungi using a surface plasmon coupled to a photosensitizer. A nanostructure (10) may include a silver nanoparticle core (12), a mesoporous silica shell (14), and a photosensitizer (16). A method of killing fungi may include contacting fungi with a nanostructure (10) including a silver nanoparticle core (12), a mesoporous silica shell (14), and a photosensitizer (16) to form a blend and exposing the blend to light.

An object of the invention is to provide particles that have excellent deodorizing properties but do not easily settle down in a case in which the particles are applied to a dispersion liquid. Another object of the invention is to provide a dispersion liquid and a film, both using the particles; a deodorizing material including the particles, the dispersion liquid, or the film; and a wet wiper and a spray, both including the dispersion liquid.

A composite particle of the invention includes a polymer particle; and at least one kind of inorganic particle selected from the group consisting of metals and metal oxides, the inorganic particle being supported on the surface of the polymer particle, in which the inorganic particles have an average particle diameter of less than 100 nm.

A method to synthesize a silver nanohybrid material. The method includes mixing a nitrate solution with a citrate solution to form silver nanoparticles (AgNPs). The method further includes esterifying a first mixture including octadecanoic acid, octadec-9-enoic acid, and octadeca-9,12-dienoic acid with caffeic acid in the presence of an acid catalyst and a solvent to form an unsaturated carboxylic acid mixture including first, second, and third acrylic acid derivatives. The method includes reacting the unsaturated carboxylic acid mixture with ethylene glycol to form a second mixture including first, second, and third ester derivatives. The method further includes mixing the AgNPs with the second mixture to form a third mixture. The method includes evaporating water from the third mixture to form the silver nanohybrid material. The silver nanohybrid material includes a AgNP core covered with the first, second, and third ester derivatives bonded to the AgNP core.

Silver nanoparticles made by a green synthesis method using silver nitrate and a chlorophyll derivative, such as a chlorophyllin are provided. The thus produced silver nanoparticles can have a crystalline structure and an average particle size ranging from about 10 nm to about 40 nm. The disclosed silver nanoparticles may be useful in treating, preventing, and/or reducing insect infestation of a variety of plants, particularly date palms.

Silver nanoparticles made by a green synthesis method using silver nitrate and a chlorophyll derivative, such as a chlorophyllin are provided. The thus produced silver nanoparticles can have a crystalline structure and an average particle size ranging from about 10 nm to about 40 nm. The disclosed silver nanoparticles may be useful in treating, preventing, and/or reducing insect infestation of a variety of plants, particularly date palms.

A non-aqueous silver precursor composition is composed of (a) one or more cellulosic polymers; (b) reducible silver ions that are present at a weight ratio to the one or more cellulosic polymers of 5:1 to 50:1; (c) an organic solvent that has a boiling point at atmospheric pressure of at least 100 C. and up to but less than 500 C.; and (d) a nitrogenous base having a pKa in acetonitrile of at least 15 and up to and including 25 at 25 C. The Hansen parameter (.sub.T.sup.Polymer) of each cellulosic polymer is less than or equal to the Hansen parameter (.sub.T.sup.Solvent) each organic solvent. In addition, the (d) nitrogenous base is present in an equimolar amount or molar excess in relation to the amount of (b) reducible silver ions.

Object: To provide a biochip for use in exhaustive analysis of a particular protein including DNA (deoxyribose nucleic acid) in a body fluid through Raman quantitative analysis. Resolving Means: Aqueous solution of metal complexes including plasmon metal selected from the group consisting of Au, Ag, Pt and Pd is supplied dropwise onto a carrier metal having an electrode potential of metal less noble than complex metal, followed by precipitation of nanometric quantum crystals from the metal complex on the carrier metal, the metal complex being so selected as to have a complex stability constant (log ) that is expressed by the following equation (I) correlating with the electrode potential E of the carrier metal:
E=(RT/|Z|.Math.F)In(.sub.i)(I)
(wherein E represents the standard electrode potential, R represents a gas constant, T represents the absolute temperature, Z represents the ion valency, and F represents the Faraday constant), the surface property of the metal complex quantum crystals on the carrier metal being subsequently adjusted in dependence on an object to be detected in the aqueous solution prior to the precipitation or after the precipitation.

Object: To provide a biochip for use in exhaustive analysis of a particular protein including DNA (deoxyribose nucleic acid) in a body fluid through Raman quantitative analysis. Resolving Means: Aqueous solution of metal complexes including plasmon metal selected from the group consisting of Au, Ag, Pt and Pd is supplied dropwise onto a carrier metal having an electrode potential of metal less noble than complex metal, followed by precipitation of nanometric quantum crystals from the metal complex on the carrier metal, the metal complex being so selected as to have a complex stability constant (log ) that is expressed by the following equation (I) correlating with the electrode potential E of the carrier metal:
E=(RT/|Z|.Math.F)In(.sub.i)(I)
(wherein E represents the standard electrode potential, R represents a gas constant, T represents the absolute temperature, Z represents the ion valency, and F represents the Faraday constant), the surface property of the metal complex quantum crystals on the carrier metal being subsequently adjusted in dependence on an object to be detected in the aqueous solution prior to the precipitation or after the precipitation.

A sintering powder comprising: a particulate having a mean longest diameter of less than 10 microns, wherein at least some of the particles forming the particulate comprise a metal at least partially coated with a capping agent. A sintering paste and sintering film comprising the sintering powder. A method for making a sintered joint by sintering the sintering powder, paste, or film in the vicinity of two or more workpieces.