Unlock instant, AI-driven research and patent intelligence for your innovation.

A Quantum Dot Synthetic Microchannel with Composite Capillary Unidirectional Auxiliary Actuation Structure

A capillary structure and auxiliary driving technology, applied in the direction of luminescent materials, chemical instruments and methods, nanotechnology, etc., can solve the problems of reduced synthesis efficiency, inconsistent growth size of nanocrystals, residence time and uneven distribution of concentration, etc., to achieve increased Large contact area, anti-backflow effect

Active Publication Date: 2019-04-09
SOUTH CHINA UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Uneven distribution of residence time and concentration will lead to inconsistent growth size of nanocrystals
Although reducing the flow rate can make the residence time distribution of the fluid in the channel close, it will also cause a decrease in the synthesis efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Quantum Dot Synthetic Microchannel with Composite Capillary Unidirectional Auxiliary Actuation Structure
  • A Quantum Dot Synthetic Microchannel with Composite Capillary Unidirectional Auxiliary Actuation Structure
  • A Quantum Dot Synthetic Microchannel with Composite Capillary Unidirectional Auxiliary Actuation Structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this example, a quantum dot synthetic microchannel with a composite capillary unidirectional auxiliary driving structure with variable cross-sectional size is designed. Among them, such as image 3 The structure shown is a schematic cross-sectional view of the entrance of the microchannel: the groove microchannel of the first-order capillary structure 5 is V-shaped, the groove depth is 2mm, and the slope wall is at an angle of 80°; the micro-groove microchannel of the second-order capillary structure 6 The channel is also V-shaped, the groove depth is 0.5mm, and the inclined wall surface is at an angle of 80°; there is a third-order capillary structure 7 in the second-order capillary structure 6, and the sintered capillary core uses copper powder with a mesh number of 200 or a particle size of 0.075mm . Such as Figure 4 The structure shown is a schematic cross-sectional view of the outlet of the microchannel: wherein, the groove microchannel of the first-order cap...

Embodiment 2

[0045] Such as Figure 5 Shown is the trapezoidal and V-shaped composite cross-sectional schematic diagram of the quantum dot synthetic microchannel with the composite capillary unidirectional auxiliary driving structure, wherein the groove microchannel of the first-order capillary structure 11 is trapezoidal, the groove depth is 1.5 mm, and is symmetrical The trapezoidal wall of the trapezoidal wall is at an angle of 60°; the microgrooves and microchannels of the second-order capillary structure 12 are V-shaped, the depth of the groove is 0.25mm, and the symmetrical inclined walls are at an angle of 60°; in the second-order capillary structure 12, there is a third-order Capillary structure13.

[0046] In the flow direction of the microchannel, there is an arrangement of copper powder particle size gradients; the third-order capillary structure in the structure 14 at the front end of the microchannel is composed of a capillary core obtained by sintering copper powder with a pa...

Embodiment 3

[0050] While ensuring the multi-channel synthesis process of quantum dots, the capillary structure covers the cross-section of the flow channel, and the parallel single-layer capillary micro-channel structure is used for composite interleaved superposition, and a double-layer interlaced composite capillary structure microchannel is designed; Figure 7 It is a schematic diagram of a double-layer staggered quantum dot synthetic microchannel with a composite capillary unidirectional auxiliary drive structure, and the cross-sectional schematic diagrams of the entrance 16 and the exit 17 are respectively shown in Figure 8a and Figure 8b shown.

[0051] Among them, the single-layer three-dimensional three-dimensional groove structure, the macroscopic view of the first-order capillary structure is an array of V-shaped groove microchannels, the groove depth is 2mm, and the symmetrical inclined wall angle is 60°; the second-order groove The groove structure is built on the inclined ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
depthaaaaaaaaaa
depthaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a quantum dot synthesis microchannel with a compound capillary one-way auxiliary driving structure. The microchannel is provided with three capillary structures, wherein the first capillary structure is a linear groove microchannel; the second capillary structure is a microgroove microchannel which is formed on the wall surface of the first capillary structure by chemical etching or laser engraving, has a smaller dimension, and is equidirectional with the first capillary structure; and the third capillary structure is a copper powder sintered capillary core attached to the second capillary structure, and the particle size of the copper powder is in gradient distribution in the linear direction. The quantum dot synthesis microchannel with the compound capillary one-way auxiliary driving structure solves the problem of unsmooth liquid flow in the reaction process of the microchannel in a macroscopic view, assists operation of an external pump, realizes auxiliary drive, and causes reactant liquid to have a uniform flow rate in a microflow channel to obtain single-sized quantum dots.

Description

technical field [0001] The invention relates to a quantum dot synthesis microchannel, in particular to a quantum dot synthesis microchannel with a composite capillary unidirectional auxiliary driving structure. Background technique [0002] Quantum dots are a kind of nanoparticle with a particle size generally between 1 and 10nm. Since electrons and holes are quantum-confined, the continuous energy band structure becomes a discrete energy level structure with molecular characteristics, and can emit after being excited. Fluorescent. Based on quantum effects, quantum dots have broad application prospects in solar cells, light-emitting devices, optical biomarkers and other fields. Scientists have devised many different ways to make quantum dots and expect this nanomaterial to have great potential for use in 21st century nanoelectronics. [0003] The microchannel synthesis method is a specific operation form and scheme of the quantum dot aqueous phase direct synthesis method. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/00B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/00
Inventor 庄宝山李宗涛汤勇梁观伟陈凯航李志陆龙生
Owner SOUTH CHINA UNIV OF TECH