CN108587599A - Quantum dot dispersion - Google Patents
Quantum dot dispersion Download PDFInfo
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- CN108587599A CN108587599A CN201810261394.4A CN201810261394A CN108587599A CN 108587599 A CN108587599 A CN 108587599A CN 201810261394 A CN201810261394 A CN 201810261394A CN 108587599 A CN108587599 A CN 108587599A
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- Prior art keywords
- quantum dot
- decentralized medium
- dispersion
- dot dispersion
- dispersion according
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/58—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing copper, silver or gold
- C09K11/582—Chalcogenides
Abstract
The application provides a kind of quantum dot dispersion, including decentralized medium and the quantum dot being dispersed in the decentralized medium, and it is alkalinity that the quantum dot, which has the surface ligand with carboxylic acid group, the decentralized medium,.In the application, quantum dot is evenly dispersed in the decentralized medium of alkalinity, and stability is high.
Description
Technical field
The invention belongs to technology of quantum dots fields, and in particular to a kind of quantum dot dispersion.
Background technology
Quantum dot is a kind of nano material of quasi-zero dimension.Since there is quantum dot fluorescence emission peak easily to adjust, emit half-peak
The advantages that width, is widely used in the fields such as illumination, display, bio-imaging, biological detection.
Quantum dot is typically dispersed in solvent, is used to store, transport in the form of a solution.But in common quantum dot
In solution, the dispersion stabilization of quantum dot is poor, and quantum dot is easy to happen heavy poly-.
Invention content
The application provides a kind of quantum dot dispersion, and to solve, quantum dot dispersion stabilization in quantum dot solution is poor to ask
Topic.
According to the one side of the application, a kind of quantum dot dispersion is provided, including decentralized medium and be dispersed in point
Quantum dot in dispersion media, it is alkalinity that quantum dot, which has the surface ligand with carboxylic acid group, decentralized medium,.
In this application, quantum dot has the surface ligand with carboxylic acid group.When decentralized medium is alkalinity, quantum dot
Can stable dispersion in a dispersion medium for a long time, be not easy heavy poly-.
In one embodiment, the pH value of decentralized medium is more than 7 and to be less than or equal to 12.It has been surprisingly found that, works as decentralized medium
PH value when being less than or equal to 7, it is heavy poly- that the quantum dot of the surface ligand with carboxylic acid group is extremely easy.And as the pH of decentralized medium
When value is more than 12, in the pH value range, quantum dot dispersion is usually needed by could be used after further handling,
The application of quantum dot dispersion can be greatly limited in this way.
In one embodiment, the pH value of decentralized medium is more than or equal to 9 and to be less than or equal to 12.On quantum dot is dispersed in
When stating in the decentralized medium of pH value range, quantum dot can preferably keep stable dispersion state.
In one embodiment, decentralized medium be the phosphate buffer of a concentration of 40~150mM, Tris-HCl buffer solutions,
One kind in borate buffer and glycine buffer.When above-mentioned buffer solution is as decentralized medium, quantum can be maintained for a long time
The pH value of point dispersion is in a relatively stable numerical value, in this way, the stability of quantum dot dispersion can be kept for a long time.
In this application, the concentration of phosphate buffer refer in phosphate buffer all phosphate groups include phosphate radical, one hydrogen radical of phosphoric acid,
The total concentration of phosphate group in dihydrogen phosphate and phosphoric acid；The concentration of Tris-HCl buffer solutions refers to the concentration of Tris；Boric acid
The concentration of buffer solution refers to the total concentration of borate；The concentration of glycine buffer refers to the concentration of glycine.
In one embodiment, the surface ligand of quantum dot is the carboxylic acid containing sulfydryl of C2 to C8.Inventor surprisingly sends out
Existing, when selecting above-mentioned surface ligand, the dispersion performance of quantum dot is more preferably.When the carbon atom number of the carboxylic acid containing sulfydryl is more than 8
When, the hydrophobicity enhancing of quantum dot surface ligand so that quantum dot solubility in aqueous solution and dispersion are remarkably decreased, to
Cause the dispersion of quantum dot unstable.In addition, when containing surface ligand of the carboxylic acid of sulfydryl as quantum dot, sulfydryl and amount
Son point is firmly combined with, and which further increases the dispersion stabilizations of quantum dot.
In this application, C2 to C8 refers to carbon atom total number possessed by surface ligand molecule, for example thioacetic acid is
Refer to the carboxylic acid containing sulfydryl of C2.
In one embodiment, the carboxylic acid containing sulfydryl of C2 to C8 includes thioacetic acid, 3- mercaptopropionic acids, 4- sulfydryl fourths
One kind in acid, 5- mercaptopentanoic acids, 6- mercaptohexanoic acids and 8- sulfydryl octanoic acids.
In one embodiment, the mass fraction that surface ligand accounts for quantum dot is 20%-50%.Inventors be surprised to learn that
When the mass fraction that surface ligand accounts for quantum dot is less than 20%, the surface ligand quantity of quantum dot is very few, can not be in quantum dot
Surface form effective protective layer, so as to cause quantum dot be easy alkalinity decentralized medium in reunite.
In one embodiment, in dispersion, a concentration of 0.1-20mg/ml of quantum dot.When the concentration of quantum dot
When in above range, quantum dot can be evenly dispersed, is not susceptible to reunite.
In one embodiment, quantum dot is silver sulfide quantum dot.In one embodiment, the grain size of silver sulfide quantum dot
In 2-20nm.
The application has the advantages that：Quantum dot has the surface ligand with carboxylic acid group in the application, passes through
Quantum dot is dispersed in the decentralized medium with alkalinity, quantum dot can be enable to keep dispersion stabilization for a long time.
Specific implementation mode
Below in conjunction with the application embodiment, technical solutions in the embodiments of the present application is described in detail, and shows
So, described embodiment is only a part of embodiment of the application, rather than whole embodiments.Based in the application
Embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Mode belongs to the application protection domain.
Embodiment 1：
In quantum dot dispersion provided in this embodiment：
Quantum dot is silver sulfide of the grain size in 10nm, and the surface ligand of quantum dot is thioacetic acid, and surface ligand accounts for quantum
The mass fraction of point is 20%, concentration 2mg/ml of the quantum dot in dispersion.
Decentralized medium is the phosphate buffer that disodium-hydrogen and sodium dihydrogen phosphate are constituted, phosphate buffer it is a concentration of
The pH value of 100mM, decentralized medium are 9.
The dispersion stabilization of quantum dot dispersion in embodiment 1 is tested.Under 4 degrees Celsius, by quantum dot point
After granular media system preserves 48 hours, in the case where rotating speed is 5000rpm, after centrifugal rotation 5min, quantum dot keeps stable dispersion state, not
See heavy poly- phenomenon.
Embodiment 2：
The quantum dot dispersion that embodiment 2 provides is substantially the same with the quantum dot dispersion provided in embodiment 1, institute
Difference is：
Quantum dot is silver sulfide of the grain size in 2nm, and the surface ligand of quantum dot is 3- mercaptopropionic acids, and surface ligand accounts for quantum
The mass fraction of point is 30%, concentration 1mg/ml of the quantum dot in dispersion.
Decentralized medium is the borate buffer that boric acid and sodium hydroxide are constituted, a concentration of 40mM of borate buffer, dispersion
The pH value of medium is 11.
The dispersion stabilization of quantum dot dispersion in embodiment 2 is tested.In test condition and embodiment 1
Test condition is identical, and quantum dot keeps stable dispersion state, has no heavy poly- phenomenon.
Embodiment 3：
The quantum dot dispersion that embodiment 3 provides is substantially the same with the quantum dot dispersion provided in embodiment 1, institute
Difference is：
Quantum dot is silver sulfide of the grain size in 15nm, and the surface ligand of quantum dot is 6- mercaptohexanoic acids, the surface ligand amount of accounting for
The mass fraction of son point is 40%, concentration 5mg/ml of the quantum dot in dispersion.
Decentralized medium is Tris-HCl buffer solutions, and a concentration of 150mM of Tris-HCl buffer solutions, the pH value of decentralized medium is
8.8。
The dispersion stabilization of quantum dot dispersion in embodiment 3 is tested.In test condition and embodiment 1
Test condition is identical, and quantum dot keeps stable dispersion state, has no heavy poly- phenomenon.
Comparative example 1：
The quantum dot dispersion that embodiment 1 provides is substantially the same with the quantum dot dispersion provided in embodiment 1, institute
Difference is：
Decentralized medium is water, and the pH value of decentralized medium is 6.7.
The dispersion stabilization of quantum dot dispersion in comparative example 1 is tested.In test condition and embodiment 1
Test condition is identical, and quantum dot occurs heavy poly-.
By above-described embodiment and comparative example it is found that the quantum dot dispersion of the application preserve 48 hours after, at a high speed from
In the case that the heart rotates (5000rpm), it can still keep dispersed well.And when decentralized medium is faintly acid (comparative example 1)
When, quantum dot dispersion occurs heavy poly- after preserving 48 hours in the case of centrifugal rotation (5000rpm).The above results are filled
Divide the high stability for showing quantum dot dispersion in the application.
Although inventor has done more detailed elaboration to the technical solution of the application and has enumerated, it should be understood that for
For those skilled in the art, above-described embodiment is modified and/or the flexible or equivalent alternative solution of use is obvious
, cannot all be detached from the essence of the application spirit, the term occurred in the application be used for elaboration to technical scheme and
Understand, the limitation to the application can not be constituted.
Claims (10)
1. a kind of quantum dot dispersion, including decentralized medium and the quantum dot that is dispersed in the decentralized medium, it is described
It is alkalinity that quantum dot, which has the surface ligand with carboxylic acid group, the decentralized medium,.
2. quantum dot dispersion according to claim 1, which is characterized in that the pH value of the decentralized medium is more than 7
And it is less than or equal to 12.
3. quantum dot dispersion according to claim 2, which is characterized in that the pH value of the decentralized medium be more than etc.
In 9 and be less than or equal to 12.
4. quantum dot dispersion according to claim 2, which is characterized in that the decentralized medium be a concentration of 40~
One kind in the phosphate buffer of 150mM, Tris-HCl buffer solutions, borate buffer and glycine buffer.
5. according to the quantum dot dispersion described in claim 2,3 or 4, which is characterized in that the surface ligand be C2 extremely
The carboxylic acid containing sulfydryl of C8.
6. quantum dot dispersion according to claim 5, which is characterized in that the carboxylic acid containing sulfydryl of the C2 to C8
Including one kind in thioacetic acid, 3- mercaptopropionic acids, 4- mercaptobutyric acids, 5- mercaptopentanoic acids, 6- mercaptohexanoic acids and 8- sulfydryl octanoic acids.
7. quantum dot dispersion according to claim 5, which is characterized in that the surface ligand accounts for the quantum dot
Mass fraction is 20%-50%.
8. quantum dot dispersion according to claim 1, which is characterized in that in the dispersion, the quantum
A concentration of 0.1-20mg/ml of point.
9. quantum dot dispersion according to claim 1, which is characterized in that the quantum dot is silver sulfide quantum dot.
10. quantum dot dispersion according to claim 9, which is characterized in that the grain size of the silver sulfide quantum dot exists
2-20nm。
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| CN201810261394.4A CN108587599A (en) | 2018-03-28 | 2018-03-28 | Quantum dot dispersion |
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| CN201810261394.4A CN108587599A (en) | 2018-03-28 | 2018-03-28 | Quantum dot dispersion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115427461A (en) * | 2020-03-31 | 2022-12-02 | 住友化学株式会社 | Curable resin composition and display device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277157A (en) * | 2011-05-30 | 2011-12-14 | 中国科学院苏州纳米技术与纳米仿生研究所 | Near-infrared silver sulphide quantum dot as well as preparation method and application thereof |
| CN102672167A (en) * | 2011-03-16 | 2012-09-19 | 首都师范大学 | Preparation and application of novel triangular sliver-silver sulfide nanocomposite particle |
| CN102701265A (en) * | 2012-06-21 | 2012-10-03 | 复旦大学 | Water-phase preparation method of near-infrared luminescent silver sulfide quantum dot |
| CN102849779A (en) * | 2012-10-11 | 2013-01-02 | 吉林大学 | Preparation method of silver sulfide quantum dots |
| CN105446003A (en) * | 2015-12-01 | 2016-03-30 | 苏州星烁纳米科技有限公司 | Quantum dot dispersion, preparation method, backlight module and display device |
| CN106032468A (en) * | 2015-12-31 | 2016-10-19 | 苏州星烁纳米科技有限公司 | Polymerizable quantum dot and application thereof |
| CN106206965A (en) * | 2016-04-25 | 2016-12-07 | 苏州星烁纳米科技有限公司 | A kind of quantum dot packaging body and preparation method thereof |
| CN106442456A (en) * | 2016-11-25 | 2017-02-22 | 清华大学 | Method of detecting zinc ions by utilizing near-infrared second region fluorescence quantum dot probe |
| CN106753344A (en) * | 2016-11-25 | 2017-05-31 | 清华大学 | Silver sulfide quantum dot and preparation method and application |
| CN107418562A (en) * | 2017-09-06 | 2017-12-01 | 东北大学 | The synthetic method of near-infrared silver sulfide quantum dot |
-
2018
- 2018-03-28 CN CN201810261394.4A patent/CN108587599A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672167A (en) * | 2011-03-16 | 2012-09-19 | 首都师范大学 | Preparation and application of novel triangular sliver-silver sulfide nanocomposite particle |
| CN102277157A (en) * | 2011-05-30 | 2011-12-14 | 中国科学院苏州纳米技术与纳米仿生研究所 | Near-infrared silver sulphide quantum dot as well as preparation method and application thereof |
| CN102701265A (en) * | 2012-06-21 | 2012-10-03 | 复旦大学 | Water-phase preparation method of near-infrared luminescent silver sulfide quantum dot |
| CN102849779A (en) * | 2012-10-11 | 2013-01-02 | 吉林大学 | Preparation method of silver sulfide quantum dots |
| CN105446003A (en) * | 2015-12-01 | 2016-03-30 | 苏州星烁纳米科技有限公司 | Quantum dot dispersion, preparation method, backlight module and display device |
| CN106032468A (en) * | 2015-12-31 | 2016-10-19 | 苏州星烁纳米科技有限公司 | Polymerizable quantum dot and application thereof |
| CN106206965A (en) * | 2016-04-25 | 2016-12-07 | 苏州星烁纳米科技有限公司 | A kind of quantum dot packaging body and preparation method thereof |
| CN106442456A (en) * | 2016-11-25 | 2017-02-22 | 清华大学 | Method of detecting zinc ions by utilizing near-infrared second region fluorescence quantum dot probe |
| CN106753344A (en) * | 2016-11-25 | 2017-05-31 | 清华大学 | Silver sulfide quantum dot and preparation method and application |
| CN107418562A (en) * | 2017-09-06 | 2017-12-01 | 东北大学 | The synthetic method of near-infrared silver sulfide quantum dot |
Non-Patent Citations (2)
| Title |
|---|
| THOMAS PONS ET AL.，: "Hydrodynamic Dimensions, Electrophoretic Mobility, and Stability of Hydrophilic Quantum Dots", 《J. PHYS. CHEM. B》 * |
| 初丛波等，: ""量子点在生物检测中的应用"", 《应用化学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115427461A (en) * | 2020-03-31 | 2022-12-02 | 住友化学株式会社 | Curable resin composition and display device |
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