CN219694923U - Multi-liquid drop suspension characterization device based on optical tweezers-Raman spectrum combination technology - Google Patents
Multi-liquid drop suspension characterization device based on optical tweezers-Raman spectrum combination technology Download PDFInfo
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- CN219694923U CN219694923U CN202320815444.5U CN202320815444U CN219694923U CN 219694923 U CN219694923 U CN 219694923U CN 202320815444 U CN202320815444 U CN 202320815444U CN 219694923 U CN219694923 U CN 219694923U
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- 238000001237 Raman spectrum Methods 0.000 title claims abstract description 50
- 239000007788 liquid Substances 0.000 title claims abstract description 45
- 239000000725 suspension Substances 0.000 title claims abstract description 41
- 230000003287 optical effect Effects 0.000 title claims abstract description 26
- 238000012512 characterization method Methods 0.000 title claims abstract description 19
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 238000012576 optical tweezer Methods 0.000 claims abstract description 36
- 238000001069 Raman spectroscopy Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 230000005284 excitation Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 10
- 238000003384 imaging method Methods 0.000 claims description 9
- 238000001489 optical tweezers Raman spectroscopy Methods 0.000 claims description 7
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000000443 aerosol Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 108010066057 cabin-1 Proteins 0.000 description 4
- 230000008859 change Effects 0.000 description 4
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- 102100027617 DNA/RNA-binding protein KIN17 Human genes 0.000 description 2
- 101001008941 Homo sapiens DNA/RNA-binding protein KIN17 Proteins 0.000 description 2
- 208000024609 Rothmund-Thomson syndrome type 2 Diseases 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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- 238000000386 microscopy Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The utility model provides a multi-drop suspension characterization device based on an optical tweezers-Raman spectrum combination technology, which comprises optical tweezers equipment, a detection device and a control device, wherein the optical tweezers equipment is used for generating optical tweezers laser, so that the optical tweezers laser is split into optical traps; the microscope module is used for focusing the optical tweezers laser above the bottom of the liquid drop capturing cabin, so that the optical trap captures suspension liquid drops; the drop capturing cabin is used as a reaction cabin for capturing suspension drops by the optical trap; the Raman spectrum module comprises a Raman spectrum excitation module and a Raman spectrum collection module; the Raman spectrum excitation module is used for generating Raman laser so that the Raman laser is focused on the suspension liquid drops; the Raman spectrum collection module is used for collecting Raman signals generated by the suspension liquid drops; the Raman spectrum module light path is connected with the light path expansion port of the optical tweezers device, so that Raman spectrum characterization of captured liquid drops is realized. So as to realize suspension and movement of a plurality of micron-sized liquid drops in the air, thereby being applicable to the research of the reaction of a plurality of liquid drops with different properties, and the like.
Description
Technical Field
The utility model relates to the technical field of aerosol detection, in particular to a multi-liquid drop suspension characterization device based on an optical tweezers-Raman spectrum combination technology.
Background
The aerosol optical tweezers technology can realize that single aerosol liquid drops are in a suspended state which is not contacted with any substrate, so that the states of atmospheric particulates and cloud droplets in the actual atmosphere are more approximately displayed and simulated. Physical and chemical properties of suspended aerosols and droplets in a simulated atmosphere environment, including hygroscopicity, volatility, and chemical composition changes, can be measured in real time by analysis in combination with raman spectroscopy. The system has the characteristics of high resolution, rapid response and strong pertinence (single particles), can simulate continuous change of single liquid drops in a laboratory, and has wide application prospect in research fields such as atmospheric pollution, dust haze, health effect of biological aerosol, global climate change and the like.
The basic principle of the aerosol optical tweezers is to capture and hold tiny liquid drops by using laser, and the time ranges from a few seconds to a few days; during this time, the characteristics and composition of the particles can be monitored by microscopy and raman spectroscopy, while the changes in aerosol physicochemical properties (chemical composition, hygroscopicity, refractive index) are studied by varying the humidity or composition of the surrounding gas. However, currently the only commercial aerosol optical tweezers device (AOT, uk) is only able to capture a single droplet at a time for research. In fact, droplets produced by laboratory atomization are heterogeneous and non-uniform in chemical composition. The existing equipment is difficult to realize the rapid selection of specific liquid drops, study the collision and other processes among different liquid drops, and limit the deep application of the equipment in complex large-atmosphere chemical processes.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a multi-droplet suspension characterization device based on an optical tweezers-Raman spectrum combined technology, which can realize suspension and movement of a plurality of micron-sized droplets in air, so that the device can be applied to research on droplet reactions with different properties and collision of a plurality of droplets, and the like, and further simulation research is carried out.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a multi-droplet suspension characterization device based on an optical tweezers-Raman spectrum combination technology, which comprises optical tweezers equipment, a droplet capturing cabin, a microscope module and a Raman spectrum module;
the optical tweezers device is used for generating optical tweezers laser so that the optical tweezers laser is split to form an optical trap;
the microscope module is used for focusing the optical tweezers laser above the bottom of the liquid drop capturing cabin, so that the optical trap captures suspension liquid drops;
the liquid drop capturing cabin is used as a reaction cabin for capturing suspension liquid drops by the optical trap;
the Raman spectrum module comprises a Raman spectrum excitation module and a Raman spectrum collection module; the Raman spectrum excitation module is used for generating Raman laser so that the Raman laser is focused on the suspension liquid drops; the Raman spectrum collection module is used for collecting Raman signals generated by suspension liquid drops; wherein, the liquid crystal display device comprises a liquid crystal display device,
and the Raman spectrum module light path is connected with the light path expansion port of the optical tweezers device, so that Raman spectrum characterization of captured liquid drops is realized.
Further, the system also comprises an imaging camera which is arranged on the side face of the microscope module and used for imaging the Raman spectrum and transmitting the Raman spectrum to a system control workstation.
Further, the suspension droplet is a plurality of droplets.
Further, the number of suspension droplets is at most 10.
Further, the number of the optical traps is at most 100.
Further, the microscope module is a double-layer light path microscope module.
Further, the optical tweezers laser is focused at a position 20-80 mu m above a bottom window of the liquid drop capturing cabin.
The beneficial effects of the utility model are as follows:
(1) The physical and chemical properties of the air suspension multi-droplet are measured, a series of captured droplets can be measured, and then the droplets with proper and specific composition and properties are screened for further simulation research;
(2) Can be applied to the reaction research of a plurality of drops and drops with different properties.
Drawings
FIG. 1 is a schematic diagram of a structure and an optical path of a multi-drop suspension-Raman spectroscopy characterization apparatus;
FIG. 2 is a Raman spectrum of ammonium sulfate droplets;
fig. 3 is a flow chart of a multi-drop suspension-raman spectroscopy apparatus.
The figures are labeled as follows: 1-a droplet capture compartment; 2-a microscope module; 3-optical tweezers laser; 4-an imaging camera; 5-raman laser; a 6-dichroic mirror; 7-delaying the lens; 8-a tunable reflective crystal; 9-an imaging lens; 10-beam expander.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and the detailed description below, in order to make the objects, technical solutions and advantages of the present utility model more clear and distinct. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present utility model are shown in the accompanying drawings. It should be noted that, the optical tweezers device, the raman spectrum and the atomizer mentioned in the present utility model are all existing technologies, and not belong to the improvement proposed to the material itself, preferably, the optical tweezers device is selected from the model of Tweez305, the raman spectrum is selected from the RTS2 micro-raman system, such as the dichroic mirror 6, the delay lens 7, the tunable reflection crystal 8 and the imaging lens 9, and the like, which are all accessories in the original optical tweezers device, namely the model of Tweez305 and the RTS2 micro-raman system.
As shown in fig. 1 to 3, the utility model provides a multi-droplet suspension characterization device based on an optical tweezers-raman spectroscopy combined technology, which comprises an optical tweezers device, a droplet capturing cabin 1, a microscope module 2 and a raman spectroscopy module;
the optical tweezers device is used for generating optical tweezers laser 3 with the wavelength of 1064nm, and the optical tweezers laser 3 is split into beams by the beam expander 10 to form an optical trap;
a microscope module 2 for focusing an optical tweezers laser 3 above the bottom of the droplet capturing cabin 1, so that an optical trap captures the suspension droplet;
a droplet capturing chamber 1 as a reaction chamber for capturing droplets of the suspension by the optical trap; preparing a solution of a specific component, and enabling micron-sized aerosol droplets to enter a capturing cabin through an aerosol generator and the like; the aerosol generator can be an atomizer or a medical atomizer; the capture chamber can control environmental conditions such as temperature and humidity, and contaminant concentration, e.g. O 3 、NO 2 Etc.;
the Raman spectrum module comprises a Raman spectrum excitation module and a Raman spectrum collection module, and is used for generating Raman laser 5, and the wavelength of the Raman laser 5 is 532nm, so that the Raman laser 5 is focused on suspension drops; the Raman spectrum collection module is used for collecting Raman signals generated by the suspension liquid drops; wherein, the liquid crystal display device comprises a liquid crystal display device,
the optical path of the Raman spectrum module is connected with the optical path expansion port of the optical tweezers device, so that Raman spectrum characterization of captured liquid drops is realized.
The change of the spectral characteristics of the liquid drops can be measured in real time through the Raman spectrum module, and the size of the liquid drops and the evolution of chemical components can be reflected; the specific liquid drop can be selected for further simulation research of the atmospheric chemical process according to the Raman spectrum characteristics of different liquid drops; the method can simulate certain atmospheric environment conditions, measure the size and the composition change of specific liquid drops, and research the atmospheric process mechanism, so that the physical and chemical properties of the air suspension multi-liquid drops are measured, a series of captured liquid drops can be measured, and then the liquid drops with proper and specific compositions and properties are screened for further simulation research, and the method can be applied to the reaction research of a plurality of liquid drops with different properties and the like.
Further, an imaging camera 4 is provided at the side of the microscope module 2 for imaging the raman spectrum and transmitting to the system control workstation.
Further, the suspension droplet is a plurality of droplets. Further, up to 10.
Furthermore, the number of the optical traps can be up to 100 at most, the probability of capturing a plurality of liquid drops is increased, and the suspension of a plurality of micron-sized liquid drops in the air can be realized.
Further, the microscope module 2 is a double-layer light path microscope module, and the positions of the moving suspension drops are controlled more accurately.
Further, the optical tweezers laser 3 is focused at the position 20-80 mu m above the window at the bottom 1 of the liquid drop capturing cabin, and the focusing effect is optimal.
As shown in fig. 3, the flow steps are as follows:
forming an optical trap capable of capturing micro-droplets in the droplet capturing cabin 1 by using the optical tweezers laser 3, introducing the micro-droplets into the droplet capturing cabin 1 by using an atomizer, controlling environmental conditions, observing for a long time, acquiring Raman spectrum signals of the droplets, repeating the previous step, acquiring Raman spectrum signal characteristics of different droplets, selecting specific droplets according to the characteristics, adjusting the laser power of the optical tweezers to realize stable capturing of the micro-droplets, moving the captured droplets to a focusing position of the Raman laser 5, acquiring Raman spectrum signals of the captured droplets, processing the Raman spectrum signals, and acquiring information such as concentration, refractive index, particle size and the like of substances in the micro-droplets.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (7)
1. A multi-drop suspension characterization device based on optical tweezers-Raman spectrum combination technology comprises optical tweezers equipment, a drop capturing cabin, a microscope module and a Raman spectrum module, and is characterized in that,
the optical tweezers device is used for generating optical tweezers laser so that the optical tweezers laser is split to form an optical trap;
the microscope module is used for focusing the optical tweezers laser above the bottom of the liquid drop capturing cabin, so that the optical trap captures suspension liquid drops;
the liquid drop capturing cabin is used as a reaction cabin for capturing suspension liquid drops by the optical trap;
the Raman spectrum module comprises a Raman spectrum excitation module and a Raman spectrum collection module; the Raman spectrum excitation module is used for generating Raman laser so that the Raman laser is focused on the suspension liquid drops; the Raman spectrum collection module is used for collecting Raman signals generated by suspension liquid drops; wherein, the liquid crystal display device comprises a liquid crystal display device,
and the Raman spectrum module light path is connected with the light path expansion port of the optical tweezers device, so that Raman spectrum characterization of captured liquid drops is realized.
2. The multi-drop suspension characterization device based on the optical tweezers-raman spectroscopy combination technique of claim 1, wherein: the system further comprises an imaging camera which is arranged on the side face of the microscope module and used for imaging the Raman spectrum and transmitting the Raman spectrum to the system control workstation.
3. The multi-drop suspension characterization device based on the optical tweezers-raman spectroscopy combination technique of claim 1, wherein: the suspension droplet is a plurality of droplets.
4. A multi-drop suspension characterization device based on optical tweezers-raman spectroscopy combination technique according to claim 1 or 3, wherein: the suspension drops are at most 10.
5. The multi-drop suspension characterization device based on the optical tweezers-raman spectroscopy combination technique of claim 1, wherein: the number of the optical traps is 100 at most.
6. The multi-drop suspension characterization device based on the optical tweezers-raman spectroscopy combination technique of claim 1, wherein: the microscope module is a double-layer light path microscope module.
7. The multi-drop suspension characterization device based on the optical tweezers-raman spectroscopy combination technique of claim 1, wherein: the optical tweezers laser is focused at a position 20-80 mu m above a window at the bottom of the liquid drop capturing cabin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320815444.5U CN219694923U (en) | 2023-04-12 | 2023-04-12 | Multi-liquid drop suspension characterization device based on optical tweezers-Raman spectrum combination technology |
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| CN202320815444.5U CN219694923U (en) | 2023-04-12 | 2023-04-12 | Multi-liquid drop suspension characterization device based on optical tweezers-Raman spectrum combination technology |
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