CN208443697U - A kind of nano particle diameter distribution detector - Google Patents
A kind of nano particle diameter distribution detector Download PDFInfo
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- CN208443697U CN208443697U CN201821253347.7U CN201821253347U CN208443697U CN 208443697 U CN208443697 U CN 208443697U CN 201821253347 U CN201821253347 U CN 201821253347U CN 208443697 U CN208443697 U CN 208443697U
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Abstract
The utility model discloses a kind of nano particle diameter distribution detector.The sample chamber of the tester includes transparent bulkhead；Laser is located at the oblique upper of sample chamber, and condenser is located at the obliquely downward of sample chamber, and the laser that laser issues reaches condenser across the bulkhead of sample chamber；Received optical signal transmission to photodetector, the output end of photodetector are connect by condenser with signal processor；Single-chip microcontroller and laser and radio-frequency oscillator control terminal is all connected with；Permanent magnet includes opposite polarity two magnet, is located at the two sides of sample chamber bulkhead；Radio-frequency oscillator is located at the bottom of sample chamber；The induction coil of radio frequency receiver is fastened in the outside of the bulkhead of sample chamber；The output end of radio frequency receiver is connect with signal processor；The output end of signal processor is connect with computer, and computer is used to calculate the particle size distribution parameters of nanoparticle.Using the tester of the utility model, measuring accuracy can be improved.
Description
Technical field
The utility model relates to field of measuring technique, more particularly to a kind of nano particle diameter distribution detector.
Background technique
Dynamic light scattering (Dynamic Light Scattering, DLS), also referred to as photon correlation spectroscopy or quasi- elastic optical dissipate
It penetrates, the fluctuation by measuring light intensity changes with time, to measure the partial size of particle.DLS technology measures particle diameter, has standard
Really, quickly, favorable repeatability the advantages that, be one of current nano particle diameter measurement most efficient method, have become nanometer
Conventional characterizing method in science and technology.But general DLS method is when measuring sample, require measurement sample is carried out it is dilute
It releases, to avoid multiple scattering, this has resulted in the easy interference by extraneous factor (dust, light, manual operation etc.) of sample,
Cause biggish measurement error.
Utility model content
The purpose of the utility model is to provide a kind of nano particle diameter distribution detectors, to improve the measurement essence of partial size
Degree reduces measurement error.
To achieve the above object, the utility model provides following scheme:
A kind of nano particle diameter distribution detector, the tester include: laser, sample chamber, single-chip microcontroller, permanent magnetic
Iron, radio-frequency oscillator, radio frequency receiver, condenser, photodetector, signal processor and computer；
The sample chamber includes transparent bulkhead；The laser is located at the oblique upper of the sample chamber, the condenser
Positioned at the obliquely downward of the sample chamber, and the laser that the laser issues reaches the optically focused across the bulkhead of the sample chamber
Mirror；The condenser by received optical signal transmission to the photodetector, the output end of the photodetector with it is described
The first input end of signal processor connects；
The first end of the single-chip microcontroller is connect with the control terminal of the laser, and the pulse for adjusting the laser is believed
Number；The second end of the single-chip microcontroller is connect with the control terminal of the radio-frequency oscillator, for adjusting penetrating for the radio-frequency oscillator
Frequency signal；The permanent magnet includes opposite polarity first magnet and the second magnet；First magnet and second magnetic
Iron is located at the two sides of the sample chamber bulkhead；The radio-frequency oscillator is located at the bottom of the sample chamber；The radio frequency connects
The induction coil for receiving device is fastened in the outside of the bulkhead of the sample chamber；The output end of the radio frequency receiver and the letter
The second input terminal connection of number processor；
The output end of the signal processor is connect with computer, and the signal processor is used to carry out received signal
Conditioning, the signal that the computer is used to be transmitted according to signal processor calculate the relaxation time of nanoparticle, and then are received
The particle size distribution parameters of rice corpuscles.
Optionally, the sample chamber is transparent quartz tube, and the laser transmittance of the transparent quartz tube is 85% or more, long
Degree is 50mm-120mm, and outer diameter 4-10mm, the material of the quartz ampoule is natural or artificial quartz.
Optionally, the laser is semiconductor laser diode, output power 65mW, central wavelength 600-
658nm。
Optionally, the permanent magnet is ndfeb magnet or samarium cobalt permanent magnet iron, field strength 0.3T, frequency 13MHz.
Optionally, the photodetector is photomultiplier tube single-photon detector or avalanche photodide single-photon detecting
Survey device.
Optionally, the condenser is double Fourier's lens assemblies, and scattering light path is 200-2000 μm.
Optionally, the particle size range of the nanoparticle of the tester detection is 1-6000nm.
According to specific embodiment provided by the utility model, the utility model discloses following technical effects:
The utility model combination DLS and low field nuclear-magnetism detection technique obtain the one-dimensional of nanoparticle by DLS detection technique
Dimensional parameters, while using the multidimensional dimensional parameters of low field nuclear-magnetism detection technique acquisition nanoparticle, nanoparticle can be obtained
Sizes parameter, while further one-dimensional dimensional parameters can be modified according to multidimensional dimensional parameters, be obtained more quasi-
True measurement result.And the tester structure of the utility model is simple, facility compact can effectively detect enriched sample, test
It is preceding without sample is diluted and pre-treatment work, it is pollution-free to sample, not damaged, being capable of accurate characterization nano particle diameter
And particle surface situation, it is especially advantageous for scene and industrial on-line quick detection.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without any creative labor, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the utility model nano particle diameter distribution detector；
Fig. 2 is the flow diagram of the utility model nano particle diameter distribution test method.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
Fig. 1 is the structural schematic diagram of the utility model nano particle diameter distribution detector.As shown in Figure 1, the test
Instrument include: sample chamber 1, laser 2, condenser 3, photodetector 4, signal processor 5, single-chip microcontroller 6, radio-frequency oscillator 7,
Permanent magnet (8-1 and 8-2 in figure), radio frequency receiver 8 and computer 10.
The sample chamber 1 includes transparent bulkhead, specifically can be using transparent quartz tube, length 50mm-120mm, outside
Diameter is 4-10mm, and the laser transmittance of transparent quartz tube is 85% or more, and the material of transparent quartz tube is Photochemistry Study grade
Natural or artificial quartz.The laser 2 is located at the oblique upper of the sample chamber 1, and the condenser 3 is located at the sample chamber
1 obliquely downward, and the laser that the laser 1 issues reaches the condenser 3 across the bulkhead of the sample chamber 1.The list
The first end of piece machine 6 is connect with the control terminal of the laser 2, for adjusting the pulse signal of the laser 2.Laser 2
Semiconductor laser diode, output power 65mW, central wavelength 600-658nm can be used.Condenser 3 can be using in double Fu
Leaf lens assembly, scattering light path are 200-2000 μm.The condenser 3 is by received optical signal transmission to the photodetector
4, the output end of the photodetector 4 is connect with the first input end of the signal processor 5.Photodetector 4 uses light
Electric multiplier tube single-photon detector (PMT) or avalanche photodide single-photon detector (APD).The signal processor 5
Output end is connect with computer 10,
Single-chip microcontroller 6 adjusts the optical signal that laser 2 issues by adjusting the pulse signal of laser 2；Using in Fu
Optical signal is passed through the scattered electron signal that sample generates and is pooled to photodetector 4 by leaf camera lens (condenser 3), then passes through signal
Nano particle diameter is converted into after processing.This principle is identical as the principle of existing DLS, different size of particle scattering electricity
Subsignal is different, and partial size is calculated by the electronic signal finally collected, and partial size at this time is one-dimensional dimensional parameters, i.e. nanoparticle
The diameter or equivalent grain size of son, for the particle of almost spherical, what is obtained is the diameter of particle；For nonspherical particle, obtain
Arrive be particle equivalent grain size.
The second end of the single-chip microcontroller 6 is connect with the control terminal of the radio-frequency oscillator 7, for adjusting the strength
The radiofrequency signal of device 7.The permanent magnet can be neodymium iron boron or samarium cobalt permanent magnet iron, field strength 0.3T, frequency 13MHz.Forever
Long magnet includes opposite polarity first magnet 8-1 and the second magnet 8-2, the first magnet 8-1 and the second magnet 8-2
The two sides of 1 bulkhead of sample chamber are located at, form the magnetic field of horizontal direction between two permanent magnets.The radio frequency reception
The induction coil of device 9 is fastened in the outside of the bulkhead of the sample chamber 1；The output end of the radio frequency receiver 9 with it is described
Second input terminal of signal processor 5 connects.The radio-frequency oscillator 7 is located at the bottom of the sample chamber 1, passes through single-chip microcontroller 6
The radiofrequency signal of radio-frequency oscillator 7 is adjusted, and then is changed between two permanent magnets (the first magnet 8-1 and the second magnet 8-2)
Magnetic direction.The relaxation time signal of sample, the relaxation of sample are obtained by the time interval that radio frequency receiver 9 receives signal
The difference of time can reflect nanoparticle degree of scatter in the solution and particle to the affinity of solvent.Therefore pass through calculating
Machine can calculate the particle size distribution parameters of nanoparticle, and the particle size parameters of the particle calculated at this time are multidimensional dimensional parameters, for example,
The volume or specific surface area of particle.This part uses low field nuclear-magnetism testing principle, tests the particle size parameters of particle.
The utility model combination DLS and integrated low field nuclear-magnetism detection technique, structure is simple, facility compact, can effectively detect
Enriched sample is not necessarily to be diluted sample before test and pre-treatment works, pollution-free to sample, not damaged, can be accurate
Nano particle diameter and particle surface situation are characterized, scene and industrial on-line quick detection are especially advantageous for.And from direct sample
It is 0-5min to the result overall process time is obtained, droplet measurement range is 1-6000nm, is set more than DLS detections all at present
It is standby.
When being measured using above-mentioned tester, on the one hand the signal that computer is transmitted according to signal processor can be counted
Calculation obtains the one-dimensional dimensional parameters and multidimensional dimensional parameters of nanoparticle, provides more detailed distribution tests knot for the distribution of particle
Fruit；On the other hand, further one-dimensional dimensional parameters can be modified by obtained multidimensional dimensional parameters, and then obtained more
Accurately particle diameter distribution test result.Referring to fig. 2, Fig. 2 is that the distribution of the utility model nano particle diameter is surveyed to detailed test process
The flow diagram of method for testing.As shown in Fig. 2, the test method includes:
Step 100: obtaining the first electric signal of radio frequency receiver transmission.
Step 200: obtaining the second electric signal of photodetector transmission.
Step 300: the first electric signal and the second electric signal are improved.The process of conditioning includes amplification, filtering, signal
Transformation etc..The effect of conditioning is to obtain standard signal.
Step 400: the one-dimensional dimensional parameters of nanoparticle are calculated according to the first electric signal after conditioning.The principle of calculating with
DLS is consistent, and obtained one-dimensional dimensional parameters are diameter (almost spherical particle) either equivalent grain size (aspheric of nanoparticle
Shape particle) height or width.
Step 500: the relaxation time of nanoparticle is calculated according to the second electric signal after conditioning.
Step 600: the multidimensional dimensional parameters of nanoparticle are determined according to the relaxation time.This part uses low field nuclear-magnetism to examine
The process that survey technology calculates Fe coatings, obtained multidimensional dimensional parameters are volume or the specific surface area face of nanoparticle
Product.
It, can also be according to multidimensional dimensional parameters parameter (volume or ratio after the multidimensional dimensional parameters that nanoparticle has been determined
Surface area) further Extrapolation particle one-dimensional dimensional parameters (diameter or equivalent grain size), to the one-dimensional ruler of nanoparticle
Very little parameter is modified, and obtains the one-dimensional dimensional parameters of revised nanoparticle, to improve the reliability of test result.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Specific case used herein is expounded the principles of the present invention and embodiment, above embodiments
Explanation be merely used to help understand the method and its core concept of the utility model；Meanwhile for the general technology of this field
Personnel, based on the idea of the present invention, there will be changes in the specific implementation manner and application range.In conclusion
The content of the present specification should not be construed as a limitation of the present invention.
Claims (7)
1. a kind of nano particle diameter distribution detector, which is characterized in that the tester includes: laser, sample chamber, monolithic
Machine, permanent magnet, radio-frequency oscillator, radio frequency receiver, condenser, photodetector, signal processor and computer；
The sample chamber includes transparent bulkhead；The laser is located at the oblique upper of the sample chamber, and the condenser is located at
The obliquely downward of the sample chamber, and the laser that the laser issues reaches the condenser across the bulkhead of the sample chamber；
The condenser is by received optical signal transmission to the photodetector, the output end of the photodetector and the signal
The first input end of processor connects；
The first end of the single-chip microcontroller is connect with the control terminal of the laser, for adjusting the pulse signal of the laser；
The second end of the single-chip microcontroller is connect with the control terminal of the radio-frequency oscillator, and the radio frequency for adjusting the radio-frequency oscillator is believed
Number；The permanent magnet includes opposite polarity first magnet and the second magnet；First magnet and second magnet point
Not Wei Yu the sample chamber bulkhead two sides；The radio-frequency oscillator is located at the bottom of the sample chamber；The radio frequency receiver
Induction coil be fastened in the outside of the bulkhead of the sample chamber；At the output end of the radio frequency receiver and the signal
Manage the second input terminal connection of device；
The output end of the signal processor is connect with computer, and the signal processor is for adjusting received signal
Reason, the signal that the computer is used to be transmitted according to signal processor calculates the relaxation time of nanoparticle, and then obtains nanometer
The particle size distribution parameters of particle.
2. tester according to claim 1, which is characterized in that the sample chamber is transparent quartz tube, the transparent stone
The laser transmittance of English pipe is 85% or more, length 50mm-120mm, outer diameter 4-10mm, and the material of the quartz ampoule is day
It is so or artificial quartzy.
3. tester according to claim 1, which is characterized in that the laser is semiconductor laser diode, output
Power is 65mW, central wavelength 600-658nm.
4. tester according to claim 1, which is characterized in that the permanent magnet is ndfeb magnet or samarium cobalt permanent magnet
Iron, field strength 0.3T, frequency 13MHz.
5. tester according to claim 1, which is characterized in that the photodetector is photomultiplier tube single-photon detecting
Survey device or avalanche photodide single-photon detector.
6. tester according to claim 1, which is characterized in that the condenser is double Fourier's lens assemblies, scattering
Light path is 200-2000 μm.
7. tester according to claim 1, which is characterized in that the particle size range of the nanoparticle of the tester detection
For 1-6000nm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821253347.7U CN208443697U (en) | 2018-08-06 | 2018-08-06 | A kind of nano particle diameter distribution detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821253347.7U CN208443697U (en) | 2018-08-06 | 2018-08-06 | A kind of nano particle diameter distribution detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663295A (en) * | 2018-08-06 | 2018-10-16 | 上海景瑞阳实业有限公司 | A kind of nano particle diameter distribution detector and test method |
| CN114324083A (en) * | 2022-01-06 | 2022-04-12 | 北京航空航天大学合肥创新研究院(北京航空航天大学合肥研究生院) | On-line testing system for comprehensive deposition of nanocluster beams |
-
2018
- 2018-08-06 CN CN201821253347.7U patent/CN208443697U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663295A (en) * | 2018-08-06 | 2018-10-16 | 上海景瑞阳实业有限公司 | A kind of nano particle diameter distribution detector and test method |
| CN108663295B (en) * | 2018-08-06 | 2024-01-23 | 上海景瑞阳实业有限公司 | Nanoparticle particle size distribution tester and testing method |
| CN114324083A (en) * | 2022-01-06 | 2022-04-12 | 北京航空航天大学合肥创新研究院(北京航空航天大学合肥研究生院) | On-line testing system for comprehensive deposition of nanocluster beams |
| CN114324083B (en) * | 2022-01-06 | 2023-09-05 | 北京航空航天大学合肥创新研究院(北京航空航天大学合肥研究生院) | Nano cluster beam integrated deposition on-line test system |
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