Title:
QUANTUM DOTS AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/029389
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: Ag2E (E is at least one of tellurium, selenium, and sulfur) quantum dots which exhibit a distinct absorption peak in the near-infrared region and with which it is possible to control the absorption wavelength in the near-infrared region according to purpose; and a highly safe quantum dot production method with which mass production is possible and the absorption wavelength can be freely controlled within the near-infrared region according to purpose. A quantum dot according to the present invention is characterized by being a nanocrystal represented by Ag2E (E is at least one of Te, Se, and S) that contains silver and a chalcogen, and by having an average particle size of 1-15 nm, inclusive. In the present invention, it is preferable for the absorption wavelength to be in the range of the near-infrared region from 800-1700 nm.
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Inventors:
SHIMASAKI TOSHIAKI (JP)
NIKATA SOICHIRO (JP)
NIKATA SOICHIRO (JP)
Application Number:
PCT/JP2020/030467
Publication Date:
February 18, 2021
Filing Date:
August 07, 2020
Export Citation:
Assignee:
NS MAT INC (JP)
International Classes:
C09K11/08; B82Y20/00; B82Y40/00; C09K11/58; C09K11/88; G02B5/20
Domestic Patent References:
| WO2012103078A1 | 2012-08-02 |
Foreign References:
| CN106190126A | 2016-12-07 | |||
| CN106520124A | 2017-03-22 | |||
| CN102517339A | 2012-06-27 | |||
| CN102826585A | 2012-12-19 | |||
| KR20190111720A | 2019-10-02 | |||
| CN105110303A | 2015-12-02 | |||
| JP2007100117A | 2007-04-19 |
Other References:
YAREMA MAKSYM, PICHLER STEFAN, SYTNYK MYKHAILO, SEYRKAMMER ROBERT, LECHNER RAINER T., FRITZ-POPOVSKI GERHARD, JARZAB DOROTA, SZEND: "Infrared Emitting and Photoconducting clloidal Silver Chalcogenide Nanocrystal Quantun Dots from a Silylamide- Promoted Synthesis", ACS NANO, vol. 5, no. 5, 2011, pages 3758 - 3765, XP055793322
CHEN CHI, HE XUEWEN, GAO LI, MA NAN: "Cation Exchange-Based Facile Aqueous Synthesis of Small, Stable, and Nontoxic Near-Infrared Ag2Te/ZnS Core/Shell Quantum Dots Emitting in the Second Biological Window", ACS APPLIED MATERIALS & INTERFACES, vol. 5, 2013, pages 1149 - 1155, XP055793313
MORE, D. S. ET AL.: "TOPO-Capped silver selenide nanoparticles and their incorporation into polymer nanofibers ising electrospinning technique", MATERIALS RESEARCH BULLET IN, vol. 65, 2015, pages 14 - 22, XP029143712, DOI: 10.1016/j.materresbull.2015.01.030
SCHLERCHT, S. ET AL.: "Synthesis and Characterization of nanoscale Bi2Te3, Sb2Te3, PbTe and Ag2Te powders: activated Metals and soluble Tellurium sources as synthetic Tools", INTERNATIONAL CONFERENCE ON THERMOELECTRICS, 2006, pages 646 - 648, XP031062520, DOI: 10.1109/ICT.2006.331224
KUMAR NEERAJ, SINHA RAY SUPRAKAS, NGILA JANE CATHERINE: "Ionic liquid-assisted synthesis of Ag/Ag2Te nanocrystals via a hydrothermal route for enhanced photocatalytic performance", ROYAL SOCIETY OF CHEMISTRY, vol. 41, 2017, pages 14618 - 14626, XP055793319
CHEN CHI, HE XUEWEN, GAO LI, MA NAN: "Cation Exchange-Based Facile Aqueous Synthesis of Small, Stable, and Nontoxic Near-Infrared Ag2Te/ZnS Core/Shell Quantum Dots Emitting in the Second Biological Window", ACS APPLIED MATERIALS & INTERFACES, vol. 5, 2013, pages 1149 - 1155, XP055793313
MORE, D. S. ET AL.: "TOPO-Capped silver selenide nanoparticles and their incorporation into polymer nanofibers ising electrospinning technique", MATERIALS RESEARCH BULLET IN, vol. 65, 2015, pages 14 - 22, XP029143712, DOI: 10.1016/j.materresbull.2015.01.030
SCHLERCHT, S. ET AL.: "Synthesis and Characterization of nanoscale Bi2Te3, Sb2Te3, PbTe and Ag2Te powders: activated Metals and soluble Tellurium sources as synthetic Tools", INTERNATIONAL CONFERENCE ON THERMOELECTRICS, 2006, pages 646 - 648, XP031062520, DOI: 10.1109/ICT.2006.331224
KUMAR NEERAJ, SINHA RAY SUPRAKAS, NGILA JANE CATHERINE: "Ionic liquid-assisted synthesis of Ag/Ag2Te nanocrystals via a hydrothermal route for enhanced photocatalytic performance", ROYAL SOCIETY OF CHEMISTRY, vol. 41, 2017, pages 14618 - 14626, XP055793319
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
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