Semiconductor nanoparticle, and a process of manufacturing the same
AssigneeHitachi Software Engineering Co., Ltd.
InventorsKeiichi Sato, Susumu Kuwabata
Life of this patent
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Abstract
The invention provides a semiconductor nanoparticle comprising a semiconductor nanoparticle core on the surface of which electron-releasing groups are arranged, the semiconductor nanoparticle having a fluorescent property and water-solubility. The invention also provides a water-soluble semiconductor nanoparticle with an excellent fluorescent property that can be easily prepared by adding a surface-treating material for providing a semiconductor nanoparticle with one or more kinds of electron-releasing groups, and arranging the electron-releasing groups on the surface of the semiconductor nanoparticle core.
Claims8
A water-soluble semiconductor nanoparticle consisting of:
- a core made of one chemical compound;
- a first layer which contains electron-releasing groups directly arranged on a surface of the core;
- and a second layer made of an ionic compound which is provided on the first layer in order to stablize the first layer,
- wherein said electron-releasing groups are of at least one type selected from the group consisting of —OR, —OCH2R, —OCOCH2R, —NHR, —N(CH2R)2, —NHCOCH2R, —CH2R, and —C6H4R, and R is one selected from the group consisting of hydrogen and substituted or unsubstituted hydrocarbon groups,
- wherein the ionic compound is of at least one type selected from the group consisting of ammonia, primary amines (R1NH2), secondary amines (R1Rith2NH), tertiary amines (R1R2R3N), quaternary ammonium compounds (R4R5R6R7N+), and R1 to R7 are each selected from the group consisting of hydrogen and substituted or unsubstituted hydrocarbon groups,
- wherein said first layer and said second layer are formed from two separate surface treatments, and
- wherein said semiconductor nanoparticle has a fluorescent property with increased bandgap fluorescence by decreasing defective fluorescence.
A fluorescent reagent comprising a semiconductor nanoparticle consisting of a core made of one chemical compound;
- a first layer which contains electron-releasing groups directly arranged on a surface of the core;
- and a second layer made of an ionic compound which is provided on the first layer in order to stablize the first layer,
- wherein said electron-releasing groups are of at least one type selected from the group consisting of —OR, —OCH2R, —OCOCH2R, —NHR, —N(CH2R)2, —NHCOCH2R, —CH2R, and —C5H4R, and R is one selected from the group consisting of hydrogen and substituted or unsubstituted hydrocarbon groups,
- wherein the ionic compound is of at least one type selected from the group consisting of ammonia, primary amines (R1NH2), secondary amines (R1R2NH), tertiary amines (R1R2R3N), quaternary ammonium compounds (R4R5R6R7N+), and R1 to R7 are each selected from the group consisting of hydrogen and substituted or unsubstituted hydrocarbon groups,
- wherein said first layer and said second layer are formed from two separate surface treatments, and
- wherein said semiconductor nanoparticle has a fluorescent property with increased bandgap fluorescence by decreasing defective fluorescence.
An optical device comprising a water-soluble semiconductor nanoparticle consisting of a core made of one chemical compound;
- a first layer which contains electron-releasing groups directly arranged on a surface of die core;
- and a second layer made of an ionic compound which is provided on the first layer in order to stablize the first layer,
- wherein said electron-releasing groups are of at least one type selected from the group consisting of —OR, —OCH2R, —OCOCH2R, —NHR, —N(CH2R)2, —NHCOCH2R, CH2R, and —C6H4R, and R is one selected from the group consisting of hydrogen and substituted or unsubstituted hydrocarbon groups,
- wherein the ionic compound is of at least one type selected from the group consisting of ammonia, primary amines (R1NH2), secondary amines (R1R2NH), tertiary amines (R1R2R3N), quaternary ammonium compounds (R4R5R6R7N+), and R1 to R7 are each selected from the group consisting of hydrogen and substituted or unsubstituted hydrocarbon groups,
- wherein said first layer and said second layer are formed from two separate surface treatments, and
- wherein said semiconductor nanoparticle has a fluorescent property with increased bandgap fluorescence by decreasing defective fluorescence.
Dependencies are inferred from the claim text.