Method and device for quantum dot synthesis under auxiliary drive of capillary force

An auxiliary drive and quantum dot technology, which is applied in chemical instruments and methods, nanotechnology, chemical/physical/physical chemical processes, etc., can solve the problem of difficult pumping of precursor solutions into microchannels, and achieve low process cost and simple operation.

Inactive Publication Date: 2017-02-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional microchannel synthesis process of quantum dots, there is a problem that the precursor solution is difficult to pump into the microchannel smoothly.

Method used

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  • Method and device for quantum dot synthesis under auxiliary drive of capillary force
  • Method and device for quantum dot synthesis under auxiliary drive of capillary force
  • Method and device for quantum dot synthesis under auxiliary drive of capillary force

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 64.25mg of cadmium oxide, 0.8ml of oleic acid, 1.0ml of oleylamine, 0.6g of tri-n-octylphosphine oxide and 1ml of 1-octadecene into a beaker and mix them, and heat at 150°C for 1 hour to obtain a cadmium precursor; 39.5mg of selenium powder, 1ml of trioctylphosphine, 1ml of oleylamine and 1ml of 1-octadecene were added to a beaker and mixed, and heated at 100°C for 20 minutes to obtain a selenium precursor; Heat at ℃ for 30 min to obtain a cadmium selenide precursor, which is placed in the precursor liquid reservoir 1 .

[0034] According to attached figure 1 The device shown is equipped with capillary force-assisted drive to synthesize cadmium selenide quantum dots, using a copper fiber mat with a copper wire diameter of 20 μm and a porosity of 80% as the first capillary liquid-absorbing core 7 and deposited in the inlet and outlet areas of the microchannel reactor 4. The second capillary liquid-absorbing core 9 and the capillary microgroove 8 provided in the reac...

Embodiment 2

[0038] Prepare the cadmium selenide precursor solution according to the method shown in Example 1, place it in the precursor liquid reservoir 1, according to the attached figure 1 The shown assembly capillary force-assisted drive synthesis of cadmium selenide quantum dots uses a copper fiber mat with a copper wire diameter of 20 μm and a porosity of 50% as the first capillary liquid-absorbing core 7 and deposited in the inlet and outlet areas of the microchannel reactor 4. The second capillary liquid-absorbing core 9 and the capillary microgroove 8 provided in the reaction area of ​​the microchannel reactor 4 have a rectangular cross-section, the groove width is 100 μm, the groove depth is 100 μm, and the capillary microgroove spacing is 500 μm.

[0039] When working, use a temperature controller to preheat the microchannel reactor 4 at 250°C for a heating time of 120s; after the preheating is completed, maintain the heating temperature of the microchannel reactor 4 at 250°C; ...

Embodiment 3

[0042] Prepare the cadmium selenide precursor solution according to the method shown in Example 1, place it in the precursor liquid reservoir 1, according to the attached figure 1The shown assembly capillary force-assisted drive synthesis of cadmium selenide quantum dots uses a copper fiber mat with a copper wire diameter of 20 μm and a porosity of 65% as the first capillary liquid-absorbing core 7 and deposited in the inlet and outlet areas of the microchannel reactor 4. The second capillary liquid-absorbing core 9 and the capillary microgroove 8 provided in the reaction area of ​​the microchannel reactor 4 have a rectangular cross-section, the groove width is 50 μm, the groove depth is 50 μm, and the capillary microgroove spacing is 300 μm.

[0043] When working, use a temperature controller to preheat the microchannel reactor 4 at 200°C for a heating time of 250s; after the preheating is completed, maintain the heating temperature of the microchannel reactor 4 at 200°C; The...

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Abstract

The invention discloses a method and a device for quantum dot synthesis under auxiliary drive of a capillary force. The device comprises a precursor liquid storage device (1), a magnetic pump (2), a flow meter (3), a micro-channel reactor (4) and a quantum dot collector (5). The method includes: pumping quantum dot precursor liquid into the micro-channel reactor (4), and enabling the precursor liquid to diffuse into capillary microgrooves (8) to react under capillary force drive of a first capillary liquid suction core (7) in an inlet area; enabling obtained quantum dot solution to flow out of the micro-channel reactor (4) under capillary force drive of a second capillary liquid suction core (9) in an outlet area and flow into a quantum dot collector (5) through a guide tube, so that the quantum dot solution is obtained. The method and the device for quantum dot synthesis under auxiliary drive of the capillary force have advantages that continuous synthesis of quantum dots under low-power or even powerless conditions is realized, uniformity of the quantum dots is effectively improved, and the synthesis method is simple in operation, low in process cost and beneficial for industrial production of the quantum dots.

Description

technical field [0001] The invention relates to a method and a device for synthesizing quantum dots, in particular to a device for synthesizing quantum dots assisted by capillary force and a method for synthesizing quantum dots. Background technique [0002] Quantum dots are a novel semiconductor nanomaterial, whose particle size is generally between 1 and 10nm, and have many unique nano-properties. Application prospect. The special photoelectric properties of quantum dots make them have great application prospects in molecular biology, cell biology, genomics, and proteomics. The prepared functional quantum dot probes can clearly distinguish tumor cells, which is expected to Become an effective material for disease diagnosis and treatment. [0003] At present, the synthesis methods of quantum dots mainly include metal-organic synthesis and aqueous phase synthesis, which have problems such as uneven temperature, different particle size scales, low synthesis efficiency in a ...

Claims

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Application Information

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IPC IPC(8): B01J19/00C09K11/00B82Y20/00B82Y40/00
CPCB01J19/0093B01J2219/00013B01J2219/00891B82Y20/00B82Y40/00C09K11/00
Inventor 陈凯航李宗涛汤勇钟桂生王卉玉卢汉光陆龙生
Owner SOUTH CHINA UNIV OF TECH
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