CN213416761U

CN213416761U - Quantum dot synthesis device

Info

Publication number: CN213416761U
Application number: CN202021008559.6U
Authority: CN
Inventors: 徐曜; 朱熹; 陆一骅
Original assignee: Shenzhen Institute of Artificial Intelligence and Robotics
Current assignee: Shenzhen Institute of Artificial Intelligence and Robotics
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-06-11
Anticipated expiration: 2030-06-04

Abstract

The utility model relates to a synthesizer of quantum dot. The quantum dot synthesizing device comprises: reaction mechanism, solid add mechanism, liquid add mechanism and control mechanism. The reaction mechanism comprises a reaction container and a heater for heating the reaction container, and the reaction container can contain reaction reagents; the solid adding mechanism comprises an injection piston and a pushing piece, the injection piston can bear solid powder, and the pushing piece can push the injection piston to move so as to add the solid powder into the reaction container; the liquid adding mechanism comprises a vessel for liquid samples and an injection pump, and the injection pump is used for adding the liquid samples in the vessel into the reaction container; the control mechanism is used for controlling the temperature of the heater and is used for controlling the movement of the pushing piece and the injection flow of the injection pump. The synthesis device has the advantages of automatic synthesis of quantum dots, high synthesis efficiency and high operation accuracy.

Description

Quantum dot synthesis device

Technical Field

The utility model relates to the field of materials, especially, relate to a synthesizer of quantum dot.

Background

With the continuous development of synthesis technology and the application of intellectualization in various industries, the improvement of synthesis efficiency has become a certain consensus with society. Various devices are developed towards the direction of being convenient to install, simple to operate, safe, efficient, intelligent, automatic and the like, and the space is saved. The quantum dot is used as a novel high-efficiency material and widely applied to optoelectronic devices. How to further improve the synthesis efficiency and quality of quantum dots is one of the hot spots in the current industrialization.

The traditional synthesis of quantum dots is relatively complex in weighing and other operations, has certain deviation, and simultaneously needs personnel to operate, and has the problem of low efficiency in synthesis.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a quantum dot synthesis apparatus that can automatically synthesize quantum dots, with high synthesis efficiency and accuracy, and with easy operation.

A quantum dot synthesis apparatus, comprising:

the reaction mechanism comprises a reaction container and a heater for heating the reaction container, and the reaction container can contain reaction reagents;

the solid adding mechanism comprises an injection piston and a pushing piece, the injection piston can contain solid powder, and the pushing piece can push the injection piston to move so as to add the solid powder into the reaction container;

the liquid adding mechanism comprises a vessel for containing a liquid sample and a syringe pump, and the syringe pump is used for adding the liquid sample in the vessel into the reaction container; and

a control mechanism for controlling the temperature of the heater and for controlling the movement of the pusher and the injection flow rate of the injection pump.

Above-mentioned quantum dot's synthesizer can be through the injection piston, the cooperation between impeller and the control mechanism, realize the automation and the accurate joining of solid powder, cooperation through injection pump and control mechanism, realize that liquid is automatic and the accurate joining, the error of weighing and getting when avoiding manual operation, the quality of the quantum dot that the accuracy and preparation obtained has been improved, cooperation through control mechanism, heater, the control of technological parameter among the realization reaction process, therefore above-mentioned quantum dot's synthesizer can the automatic synthesis quantum dot, synthesis efficiency has been improved. Therefore, the synthesis device has the advantages of automatic synthesis of quantum dots, high synthesis efficiency and high operation accuracy.

In one embodiment, the injection device further comprises a housing, the heater and the reaction container are arranged in the housing, the housing is provided with a top plate, the top plate is provided with a sample inlet, the injection piston and the pushing piece are both arranged on the top plate, and the injection piston and the injection pump are both communicated with the reaction container through the sample inlet.

In one embodiment, the vessel, the syringe pump, and the control mechanism are all disposed outside of the housing.

In one embodiment, the housing is an aluminum alloy housing.

In one embodiment, the pusher is a lead screw guide.

In one embodiment, the control mechanism comprises a computer and a single chip microcomputer, the computer is connected with the single chip microcomputer through a serial port, the computer is further connected with the heater and the injection pump through serial ports so as to control the heater and the injection pump through the serial ports, the single chip microcomputer is electrically connected with the pushing piece, and the single chip microcomputer can control the movement of the pushing piece so as to enable the pushing piece to push the injection piston to move.

In one embodiment, the single chip microcomputer comprises an STM32 control plate, and the STM32 control plate is electrically connected with the pushing piece.

In one embodiment, the liquid adding mechanism further comprises a plurality of connecting pipes for communicating the vessel, the syringe pump and the reaction vessel.

In one embodiment, the heater is further capable of stirring the reaction reagent in the reaction vessel, and the control unit is further capable of controlling a rotation speed of the heater.

In one embodiment, the vessel is a beaker.

In one embodiment, the heater is a magnetically heated stirrer.

Drawings

Fig. 1 is a schematic structural diagram of a quantum dot synthesis apparatus according to an embodiment;

fig. 2 is a schematic view showing a connection relationship between a control mechanism and another mechanism in the quantum dot synthesizing apparatus shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Element number description:

a quantum dot synthesizing device 10; the reaction mechanism 100: a reaction vessel 110, a heater 120; solid adding mechanism 200: the injection piston 210, the pusher 220; liquid addition mechanism 300: vessel 310, syringe pump 320, connecting tube 330; the control mechanism 400: a computer 410, a single chip 420; the housing 500: top plate 510, sample inlet 520.

Referring to fig. 1, an embodiment of a quantum dot synthesis apparatus 10 includes: a reaction mechanism 100, a solid adding mechanism 200, a liquid adding mechanism 300, and a control mechanism 400.

The reaction mechanism 100 includes a reaction container 110 and a heater 120 for heating the reaction container 110, and the reaction container 110 can contain a reaction reagent.

Specifically, the heater can also stir the reaction reagent in the reaction container. In the present embodiment, the heater 120 is a magnetic heating stirrer. It is understood that in other embodiments, the heater 120 may be other conventional devices with heating and stirring functions. The heater 120 can control the reaction temperature and the stirring speed of the reaction reagent in the reaction vessel 110.

In one embodiment, the reaction reagents include a solid sample and a liquid sample. For example, when graphene quantum dots are synthesized, the solid sample is graphene oxide and the liquid sample is N, N-dimethylformamide. The graphene quantum dots have important potential application in the fields of biology, medicine, novel semiconductor devices and the like, can realize a monomolecular sensor, and can also be used for promoting the growth of a subminiature transistor or manufacturing a chemical sensor, a solar cell, a medical imaging device or a nanoscale circuit and the like by using on-chip communication carried out by a semiconductor laser. Therefore, the device capable of automatically synthesizing the quantum dots is adopted to synthesize the graphene quantum dots, so that the industrial synthesis of the graphene quantum dots can be realized, and the device has wide application prospect. It will be appreciated that when other quantum dots are synthesized, the reagents used may be those commonly used in the art.

Referring to fig. 2, the solid adding mechanism 200 includes an injection piston 210 and a pushing member 220, the injection piston 210 can contain solid powder, and the pushing member 220 can push the injection piston 210 to move to add the solid powder into the reaction vessel 110. In particular, the injection piston 210 is connected with a pusher 220.

In one embodiment, the pusher 220 is a lead screw rail. When the pushing member 220 is a lead screw guide rail, the structure of the pushing member 220 may be a structure commonly used in the art, for example, the pushing member 220 includes a lead screw, a guide rail, a slider, a motor, and the like, the lead screw can push the slider to move in the guide rail under the driving of the motor, and the slider is connected with the injection piston 210. The pushing member 220 can push the injection piston 210 to move, and automatic feeding of the solid powder into the reaction vessel 110 is realized.

In one embodiment, the solid powder is graphene oxide, and graphene quantum dots can be prepared. It will be appreciated that in other embodiments, the solid powder used is adjusted according to the composition and properties of the quantum dots to be produced. It is understood that when there are a plurality of solid powders, the solid powders may be uniformly mixed according to a certain ratio and then added into the injection piston 210 to be simultaneously added into the reaction vessel 110 by the pushing of the pushing member 220, and a plurality of injection pistons 210 and pushing members 220 cooperating with the injection pistons 210 may be further provided, and each solid powder is respectively placed into one injection piston 210 and then added into the reaction vessel 110 by the pushing of one pushing member 220.

The liquid adding mechanism 300 includes a vessel 310 for containing a liquid sample and a syringe pump 320, and the syringe pump 320 is used for dosing the liquid sample in the vessel 310 into the reaction vessel 110.

It is understood that when two or more liquid samples are used, the liquid samples may be uniformly mixed in a certain ratio and then placed in the vessel 310, or a plurality of vessels 310 may be provided. The plurality of vessels 310 respectively contain one liquid sample, in this case, the number of syringe pumps 320 may also be multiple, and each syringe pump 320 is communicated with one vessel 310 for adding the liquid sample in one vessel 310 into the reaction vessel 110. Specifically, the number of vessels 310 and syringe pumps 320 may be adjusted according to the kind of liquid sample used.

In one embodiment, vessel 310 is a beaker. It is understood that in other embodiments, the vessel 310 is not limited to a beaker, but may be a container capable of holding a liquid, such as a flask, a conical flask, etc., which are commonly used in the art.

In one embodiment, syringe pump 320 is an industrial syringe pump. It is understood that in other embodiments, the syringe pump 320 is not limited to being an industrial syringe pump, and the syringe pump 320 may also be other pumps capable of infusing a liquid sample.

Specifically, the liquid adding mechanism 300 further includes a plurality of connection pipes 330, and the plurality of connection pipes 330 respectively communicate the vessel 310, the syringe pump 320, and the reaction container 110. In one embodiment, the connection tube 330 is a hose. The hose has better flexibility, no blockage and no stiffness; the weight is light, and the aperture consistency is good; the flexibility, repeated bending property and flexibility are good; corrosion resistance and the like, and can be suitable for various liquid samples. It is understood that in other embodiments, the connection pipe 330 is not limited to a hose, but may be other conventional pipes.

The control mechanism 400 is used to control the temperature and rotational speed of the heater 120, and to control the movement of the pusher 220 and the injection flow rate of the syringe pump 320. Specifically, when a plurality of syringe pumps 320 are included in the liquid adding mechanism 300, the control mechanism 400 is used to control the flow rate of each syringe pump 320. Specifically, the control mechanism 400 is connected with the heater 120, the pushing member 220 and the injection pump 320 through serial ports.

In one embodiment, referring to fig. 2, the control mechanism 400 includes a computer 410 and a single-chip microcomputer 420. The computer 410 is connected with the singlechip 420 through a serial port. The computer 410 is connected with the heater 120 and the syringe pump 320 through serial ports, so as to control the heater 120 and the syringe pump 320 through the serial ports. The computer 410 can control the heating temperature and the stirring speed of the heater 120, and the computer 410 can control the on-off and the flow rate of the syringe pump 320.

The single chip 420 is connected with the computer 410 through a serial port, and the single chip 420 is also electrically connected with the pushing member 220. The single chip 420 is used for controlling the movement of the pushing member 220 so that the pushing member 220 pushes the injection piston 210 to move, and the injection piston 210 adds the solid powder into the reaction vessel 110. Specifically, the single chip 420 controls the motor of the pushing member 220 to work, so that the pushing member 220 is controlled to move, and the automatic addition of the solid powder is realized. In one embodiment, the single chip 420 includes an STM32 control board. Further, the single chip microcomputer 420 is an STM32 control panel. The STM32 control plate is electrically connected to the pusher member 220. The STM32 control panel can accurately control the motion of impeller, realizes the accurate interpolation of solid sample to weighing error when reducing personnel's operation.

Further, the heater 120 also has a weighing function capable of weighing the mass of the solid powder added to the reaction vessel 110, and the heater 120 is also capable of feeding back the mass to the control mechanism 400, and the control mechanism 400 is capable of controlling the movement of the pusher 220 according to the mass fed back by the heater 120. Specifically, the heater 120 can feed back the mass to the computer 410 of the control mechanism 400, and the computer 410 of the control mechanism 400 can control the movement of the pusher member 220 based on the mass fed back by the heater 120. The computer 410 can control the mass of the solid powder added to the reaction vessel 110 through the heater 120 and the pushing member 220. In actual use, the mass of solid powder to be added is input at the computer 410, and then the pushing motion of the pushing member 220 is controlled by the STM32 control plate 420 to push the injection piston 210 to add the solid powder into the reaction vessel 110. When the mass of the weighed solid powder in the heater 120 reaches a preset value, the result is fed back to the computer 410, and the computer 410 thereby controls the plate 420 via the STM32 to stop the movement of the pusher 220, thereby stopping the injection piston 210 from adding the solid powder to the reaction vessel 110. The combined action of the heater 120, the injection piston 210, the pushing piece 220, the single chip microcomputer 420 and the computer 410 can accurately control the dosage of the added solid powder, and the problems of operation errors of manual weighing and low efficiency are avoided.

Specifically, the quantum dot synthesis apparatus 10 further includes a housing 500. The heater 120 and the reaction vessel 110 are disposed inside the case 500. The heater 120 and the reaction vessel 110 are disposed inside the case to prevent interference of external impurities during the reaction.

The vessel 310 and the syringe pump 320 are both disposed outside the housing 500. The vessel 310 and the syringe pump 320 are disposed outside the housing 500, so that the vessel 310 can be conveniently replenished with liquid at any time, and the synthesis reaction can be continuously performed. In addition, the computer 410 of the control mechanism 400 is also disposed outside the housing 500, so that the operation of the liquid adding mechanism 300, the solid adding mechanism 200, and the reaction mechanism 100 can be controlled by operating the computer 410.

Specifically, the housing 500 is provided with a top plate 510, and the injection piston 210 and the pusher 220 are both disposed on the top plate 510 of the housing 500. The top plate 510 is provided with a sample inlet 520. The injection piston 210 and the injection pump 320 are both in communication with the reaction vessel 110 through the sample inlet 520. Specifically, the syringe pump 320 communicates with the sample inlet 520 through the connection tube 350, and the sample inlet 520 can pass the connection tube 350. Specifically, there are two sample inlets 520, and one sample inlet 520 is a liquid inlet and is communicated with the syringe pump 320 through the connection tube 350. The other sample inlet 520 is a solid sample inlet and is in communication with the injection piston 210. The sample inlets 520 are two, so that the sample introduction of the solid powder and the liquid sample is facilitated.

By providing the housing 500, on the one hand, the precursor reaction can be performed inside the housing 500, and interference by other substances can be avoided, and on the other hand, the solid adding mechanism 200 can be provided on the top plate 510 of the housing 500, and the structure can be more compact and simpler.

In one embodiment, the housing 500 is an aluminum alloy housing. The aluminum alloy shell has the advantages of light weight, high strength, good corrosion resistance and the like, so that the weight of the whole device is reduced. It is understood that in other embodiments, the housing 500 is not limited to an aluminum alloy housing, but may be a housing made of other materials, such as a stainless steel housing.

The operation principle of the quantum dot synthesizing apparatus 10 of the present embodiment is as follows: the computer 410 is connected with the STM32 control plate 420 through an electric circuit to realize communication control, the STM32 control plate 420 is electrically connected with the pushing piece 220, so that the STM32 control plate 420 controls the linear reciprocating motion of the pushing piece 220, the pushing piece 220 carries out the linear reciprocating motion to push the injection piston 210 to add solid powder into the reaction vessel 110, and the accurate quantitative addition of the solid powder is realized by combining the control of the heater 120 and the computer 410. The computer 410 is connected with the syringe pump 320 through a serial port to control the flow rate of the liquid passing through the syringe pump 320, thereby realizing the quantitative addition of the liquid sample. The computer 410 is connected with the heater 120 through a serial port to control the stirring speed and temperature of the heater 120, so as to control the process parameters in the reaction process. Therefore, the quantum dots of the present embodiment can be synthesized automatically and accurately in a quantitative manner, and the synthesized quantum dots have high quality and high synthesis efficiency.

The quantum dot synthesis device 10 has at least the following advantages:

(1) the quantum dot synthesizing device 10 can realize automatic synthesis of quantum dots, avoids the complexity, low efficiency and the like of manual operation, improves the synthesis efficiency, and can be applied to industrialized synthesis of quantum dots.

(2) The quantum dot synthesizing device 10 can realize the accurate control of the dosage of the solid powder through the matching among the injection piston 210, the pushing piece 220, the STM32 control panel 420 and the heater 120, realize the accurate control of the dosage of the liquid powder through the matching of the injection pump 320 and the computer 410, avoid the errors of weighing and measuring during manual operation, and improve the accuracy and the quality of the prepared quantum dots.

(3) The quantum dot synthesis device 10 is simple and compact in structure and small in size, avoids the problem that a hydrothermal kettle and a heating furnace are adopted when a traditional hydrothermal method is adopted for synthesizing quantum dots, is overlarge in size, has certain potential safety hazards, and has the problems of installation and transportation.

Specifically, the operation of the quantum dot synthesizing apparatus 10 for synthesizing quantum dots is as follows:

(1) a sufficient amount of solid powder is previously added to the injection plunger 210 and a sufficient amount of liquid sample is added to the vessel 310 for use.

(2) The computer 410 of the control mechanism 400 controls the injection pump 320 to add a fixed amount of liquid sample into the reaction vessel 110, and the control board 420 of the control mechanism 400 controls the pushing member 220 to drive the injection piston 210 to move, so as to add a fixed amount of solid powder into the reaction vessel 110.

(3) The computer 410 of the control means 400 controls the temperature and the rotational speed of the heater 120 to react the reaction reagents in the reaction vessel 110, thereby preparing quantum dots.

Specifically, in the process (2), specifically, a preset amount of the liquid sample to be added is input at the computer 410, and then the syringe pump 210 is controlled to add the preset amount of the liquid sample to the reaction vessel 110. Through the control of the computer 420 and the execution of the injection pump 110, the automatic addition and the accurate control of the liquid sample amount are realized, and the problems of operation error and low operation efficiency of manually measuring the liquid sample are solved.

The single chip microcomputer 420 controls the pushing piece 220 to move so as to push the injection piston 210 to move, solid powder is added into the reaction container 110, meanwhile, the mass weighing in the heater 120 is combined, the using amount of the added solid powder is accurately controlled, the error of manual weighing is avoided, and the automatic and accurate adding of the solid powder is realized.

In one embodiment, in process (3), the temperature of the heater 120 is 200 ℃ and the rotation speed is 300 r/min. It is understood that in other embodiments, the temperature and the rotation speed of the heater 120 are not limited to the above values, but may be parameters commonly used in the art, or may be adjusted according to the structure and performance of the quantum dot to be prepared.

The quantum dot synthesis device 10 realizes the automatic synthesis of quantum dots, improves the synthesis efficiency of quantum dots, and can be applied to the mass production of quantum dots. The quantum dot synthesizing device 10 can accurately control the amount of each added substance, and avoids errors in the manual operation process, so that the synthesized quantum dots have better performance and high consistency.

The following are specific examples:

example 1

The synthesis process of the graphene quantum dot in the embodiment is specifically as follows:

1g of graphene oxide powder is added into the injection piston 210 in advance, a sufficient amount of N, N-dimethylformamide is added into the vessel 310, 30mL of N, N-dimethylformamide is injected into the reaction vessel 110 by controlling the injection pump 320 through the computer 420, and the movement of the lead screw guide is controlled by connecting the computer 410 with the STM32 control board to push the injection piston 210 to inject 0.81g of graphene oxide powder into the reaction vessel 10. And then controlling the temperature of the heater 120 at 200 ℃ and the rotation speed at 300r/min by the computer 420, so that the reagents in the reaction container 110 react, and automatically synthesizing the graphene quantum dots within 5-7 hours.

The graphene quantum dot can be obtained by the embodiment, the operation efficiency is high, and the synthesized graphene quantum dot is good in quality and excellent in performance.

It should be noted that, in the above embodiment, only the synthesis process of the graphene quantum dot is given, and the synthesis processes of other quantum dots are similar to those in embodiment 1, and are not described again here.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A quantum dot synthesis apparatus, comprising:

2. The quantum dot synthesizing device according to claim 1, further comprising a housing, wherein the heater and the reaction vessel are disposed inside the housing, the housing is provided with a top plate, the top plate is provided with a sample inlet, the injection piston and the pushing member are both disposed on the top plate, and the injection piston and the injection pump are both communicated with the reaction vessel through the sample inlet.

3. The apparatus of claim 2, wherein the vessel, the syringe pump, and the control mechanism are all disposed outside the housing.

4. The quantum dot synthesis apparatus of claim 2, wherein the shell is an aluminum alloy shell.

5. The quantum dot synthesizer of claim 1, wherein the pusher is a lead screw guide.

6. The quantum dot synthesizing device according to claim 1, wherein the control mechanism includes a computer and a single chip microcomputer, the computer is connected to the single chip microcomputer via a serial port, the computer is further connected to the heater and the injection pump via serial ports to control the heater and the injection pump via the serial ports, the single chip microcomputer is electrically connected to the pushing member, and the single chip microcomputer can control the movement of the pushing member to push the injection piston to move.

7. The quantum dot synthesis device of claim 6, wherein the single chip microcomputer comprises an STM32 control board, and the STM32 control board is electrically connected with the pushing piece.

8. The apparatus for synthesizing quantum dots according to claim 1, wherein the liquid adding mechanism further comprises a plurality of connecting pipes for communicating the vessel, the injection pump and the reaction vessel.

9. The apparatus according to claim 1, wherein the heater is further capable of stirring a reaction reagent in the reaction container, and the control means is further capable of controlling a rotation speed of the heater.

10. The apparatus for synthesizing quantum dots according to claim 9, wherein the heater is a magnetic heating stirrer.