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Biocompatible quantum dot light-emitting film and preparation method thereof

A quantum dot luminescent and biocompatible technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems that thin films are difficult to maintain the optical properties of silicon quantum dots, hinder the solid-state application of silicon quantum dots, and quench the fluorescence of quantum dots. Achieve excellent luminous performance and optical stability, excellent luminous efficiency, and low price

Inactive Publication Date: 2015-11-25
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the most important point that quantum dots need to solve in solid-state luminescence is that due to the inherent incompatibility between inorganic quantum dots and organic polymers, if quantum dots are directly compounded with organic materials to form thin films, quantum The dots will aggregate during this curing process, resulting in fluorescence quenching or phase separation, and the final thin film cannot retain the excellent optical properties of the original silicon quantum dots.
Secondly, although the solid-state light-emitting device of silicon quantum dots can be obtained by spin coating on a glass plate, how to transfer silicon quantum dots from the glass substrate to other devices, and how to combine silicon quantum dots with flexible polymer materials Combined, these problems have greatly hindered the solid-state application of silicon quantum dots

Method used

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  • Biocompatible quantum dot light-emitting film and preparation method thereof
  • Biocompatible quantum dot light-emitting film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. A colloidal solution of silicon quantum dots with excellent optical properties that is stably dispersed in water is self-made in the laboratory;

[0023] 2. Prepare a hectorite aqueous solution with a mass fraction of 2%: weigh 0.2g of hectorite into a beaker, add 10ml of deionized water to fully dissolve;

[0024] 3. Mix 0.3ml of the bentonite aqueous solution obtained above with 50ml of silicon quantum dot colloidal solution, and stir thoroughly;

[0025] 4. Prepare 100ml of 3% sodium alginate aqueous solution, mix it with the above mixed solution, and stir thoroughly;

[0026] 5. Cast the obtained mixed solution on a mold with a size of 200mm×275mm, and place it in an environment with a temperature of about 25°C and a humidity of less than 40% for more than 24 hours;

[0027] 6. After the water evaporates completely, a film-like material with uniform texture, good luminescence performance and stability can be obtained.

Embodiment 2

[0029] 1. Obtain a carbon quantum dot colloidal solution with excellent optical properties that is stably dispersed in water through market purchase;

[0030] 2. Prepare a hectorite aqueous solution with a mass fraction of 2%: weigh 0.2g of hectorite into a beaker, add 10ml of deionized water to fully dissolve;

[0031] 3. Mix 0.3ml of the bentonite aqueous solution obtained above with 50ml of silicon quantum dot colloidal solution, and stir thoroughly;

[0032] 4. Prepare 100ml of 3% sodium alginate aqueous solution, mix it with the above mixed solution, and stir thoroughly;

[0033] 5. Cast the obtained mixed solution on a mold with a size of 200mm×275mm, and place it in an environment with a temperature of about 25°C and a humidity of less than 40% for more than 24 hours;

[0034] 6. After the water evaporates completely, a film-like material with uniform texture, good luminescence performance and stability can be obtained.

Embodiment 3

[0036] 1. A colloidal solution of silicon quantum dots with excellent optical properties that is stably dispersed in water is self-made in the laboratory;

[0037] 2. Prepare a montmorillonite aqueous solution with a mass fraction of 1%: weigh 0.1 g of montmorillonite powder into a beaker, add 10 ml of deionized water to fully dissolve;

[0038] 3. Mix 0.3ml of the bentonite aqueous solution obtained above with 50ml of silicon quantum dot colloidal solution, and stir thoroughly;

[0039] 4. Prepare 100ml of 3% sodium alginate aqueous solution, mix it with the above mixed solution, and stir thoroughly;

[0040] 5. Cast the obtained mixed solution on a mold with a size of 200mm×275mm, and place it in an environment with a temperature of about 25°C and a humidity of less than 40% for more than 24 hours;

[0041] 6. After the water evaporates completely, a film-like material with uniform texture, good luminescence performance and stability can be obtained.

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Abstract

The invention belongs to the technical field of solid light emitting and high polymer materials, and particularly discloses a biocompatible quantum dot light-emitting film and a preparation method thereof. The preparation method includes the steps that light-emitting quantum dots (such as silicon quantum dots) and protecting matter (such as laponite) of the quantum dots serve as centre materials, the center materials and water solubility natural polymers (such as sodium alginate, CMC and mulberry silk proteins) capable of being used for film forming are subject to blending, indoor-temperature drying and the like, and the biocompatible quantum dot light-emitting film is prepared. The preparation process is simple, green, moderate, efficient and low in cost, and energy is saved; the optical property of the raw silicon quantum dots in the liquid state can be retained through the obtained quantum dot light-emitting film, stability is good, and the biocompatible quantum dot light-emitting film has broad application prospects in the biomedical fields of solid light emitting, biological catalysis, biological detecting, biosensing and the like.

Description

Technical field [0001] The present invention is a solid -state glow and polymer material technology field, which involves a biocontrol quantum dot light film and its preparation methods. Background technique [0002] Silicon quantum dots, compared to the classic II-Vi tribe heavy metal quantum dots, the most prominent advantage is its good biocompatibility.In addition, people have developed more and more water -soluble silicon quantum dots. In addition to enabling silicon quantum dots to be used as environmentally friendly materials in the field of photoelectric, it also provides more in the field of biomedicine in the field of biomedicine.Large application space.At present, in the biological field, the application of quantum dots is relatively single. It is the most widely and most common application for biological fluorescence probes for biological fluorescent probes. There are few reports of other biological applications.Among them, the form of light emitting in quantum dots -...

Claims

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Application Information

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IPC IPC(8): C08L5/04C08L89/00C08L1/28C08K9/12C08K3/02C08J5/18C09K11/59
Inventor 邵正中黄静纯李颀
Owner FUDAN UNIV
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