Semiconductor quantum dot and method of carrying out chemical reaction or photoluminescence reaction by using the same

Patent metadata

Field	Value
Publication number	US-2020009526-A1
Application number	US-201916572785-A
Country	US
Kind code	A1
Filing date	Sep 17, 2019
Priority date	Sep 19, 2014
Publication date	Jan 9, 2020
Grant date	—

Abstract

A semiconductor quantum dot is provided with a non-metallic substrate, and has a particle size ranged from 0.3 to 100 nm. A method of carrying out a chemical reaction or a photoluminescence reaction by using the semiconductor quantum dot is also provided. A redox reaction of a target sample is carried out, an active substance is generated, or an electron-hole pair is produced from the semiconductor quantum dot by providing the semiconductor quantum dot with a predetermined energy. Photons are released by the combination of the electron-hole pair so as to perform the photoluminescence reaction.

First claim

What is claimed is:

1 . A method of carrying out a chemical reaction by using a semiconductor quantum dot, comprising steps of:
(1) mixing a target sample and the semiconductor quantum dot, wherein the semiconductor quantum dot comprises oxidized graphene oxide and has a particle size ranging from 0.3 to 100 nm; and (2) providing the semiconductor quantum dot with a predetermined energy, so that the semiconductor quantum dot generates electron-hole pairs, and a redox reaction of the target sample is carried out by the electron-hole pairs; or the target sample or a surrounding molecule thereof generates an active substance, and a redox reaction of the target sample is carried out by the active substance.

2 . The method according to claim 1 , wherein the semiconductor quantum dot comprises at least one dopant.

3 . The method according to claim 2 , wherein the dopant is selected from at least one of group IIIA element, group IVA element, group VA element, group VIA element, and transition element having an empty d orbital.

4 . The method according to claim 2 , wherein the dopant is at least one of O, N, P, B, Fe, Co, and Ni.

5 . The method according to claim 2 , wherein the dopant has a doping ratio more than 0 mol % and less than 50 mol %.

6 . The method according to claim 1 , wherein the semiconductor quantum dot is disc-shaped, and has a thickness ranged from 0.1 nm to 10 nm.

7 . The method according to claim 1 , wherein the semiconductor quantum dot has a surface with at least one functional group selected from H, a group-VA-element functional group, or a group-VIA-element functional group.

8 . The method according to claim 7 , wherein the group-VA-element functional group is an amino group, P, or a phosphate group.

9 . The method according to claim 7 , wherein the group-VIA-element functional group is hydroxyl, carbonyl, carboxyl, or acyl.

10 . The method according to claim 1 , wherein the predetermined energy is provided by a laser, a mercury lamp, a visible light, an ultraviolet light, an infrared light, an endoscopic light, an X-ray, an ultrasound, an electric field, a magnetic field, a nuclear magnetic resonance, or a light-emitting diode in the step (2).

11 . The method according to claim 1 , wherein the redox reaction in the step (2) comprises decomposition of the target sample, polymerization of the target sample, activation of the target sample, or deactivation of the target sample.

12 . The method according to claim 11 , wherein the active substance is a free radical or a peroxide.

13 . The method according to claim 12 , wherein the free radical is O 2. or OH.;
and the peroxide is H 2 O 2 .

14 . The method according to claim 1 , wherein the target sample is selected from biological cells, bacteria, viruses, parasites, cell secretions, biological molecules, an organic compound, or an inorganic compound.

15 . The method according to claim 14 , wherein the organic compound is an aromatic compound, alcohol, aldehyde, ketone, acid, amine, urea, or a polymer thereof.

16 . The method according to claim 14 , wherein the inorganic compound is water, nitrite, nitrate or ammonia.

17 . The method according to claim 14 , wherein the biological molecules are peptides, nucleic acids, lipids, carbohydrates, vitamins, hormones, or a polymer thereof.

18 . The method according to claim 14 , wherein the cell secretions are extracellular vesicles or extracellular matrix.

Assignees

• Univ Nat Cheng Kung
• National Cheng Kung Univ Hospital

Inventors

• Huang Wei-Lun
• Su Wu-Chou
• Chen Hai-Wen
• Yeh Te-Fu
• Teng Hsisheng
• Chung Chung-Jen

Classifications

• B01J21/06

  Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof · CPC title

• G01N33/588

  with semiconductor nanocrystal label, e.g. quantum dots · CPC title

• B01J19/127

  Sunlight; Visible light · CPC title

• B01J27/24

  Nitrogen compounds · CPC title

• B01J23/745

  Iron · CPC title