CN108594288A - A kind of surface has the plastic scintillant and preparation method thereof of microlens array - Google Patents
A kind of surface has the plastic scintillant and preparation method thereof of microlens array Download PDFInfo
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Abstract
The present invention relates to the plastic scintillants and preparation method thereof that a kind of surface has microlens array, in the case of solving existing flash detection and scintillator being detached with photoelectric device in radiation image-forming system, photoelectric device receives the problem that fluorescence efficiency is low, system performance is limited.It includes plastic scintillant that surface, which has the plastic scintillant of microlens array, and the plastic scintillant surface is additionally provided with microlens array, and the microlens array is made of hemispherical bead, and is in hexagon dense packing between hemisphere and hemisphere；The small ball's diameter of the microlens array is 4~10 μm；The thickness of the plastic scintillant is more than or equal to 10 μm.Meanwhile preparing preparation method of the above-mentioned surface with microlens array plastic scintillant the present invention also provides a kind of.
Description
Technical field
The present invention relates to nuclear radiation detection technical fields, and in particular to a kind of surface has the Plastic scintillation of microlens array
Body and preparation method thereof.
Background technology
Scintillation detector and radiation image-forming system high-energy physics and nuclear physics experiment, nuclear medicine, cosmic ray with
It is widely applied in the fields such as dark matter detection, plays an important role, be a kind of irreplaceable detector kind
Class.Scintillator is one of scintillation detector and two big Primary Components of radiation image-forming system front end, flicker with photoelectric detector
The energy that ray or high energy particle deposit is converted to optical region fluorescent radiation and come out by body, and fluorescence is collected and whole by photoelectric device
It is converted into electric signal output, is finally recorded by rear end electricity system, to realize to ray particle energy, time, intensity, space
The parameter measurements such as position.Therefore, the photoyield of scintillator, time response, emitting space distribution character are to detector and imaging
Performance of uniting has great influence.
Plastic scintillant is a kind of scintillator being most widely used in scintillator, and plastic scintillant is usually by host material
(solvent), the first luminescent substance, the second luminescent substance (Wavelength shifter) composition form stable organic flicker by polymerisation and send out
Luminescent material.Plastic scintillant can be easily made the transparent material of large volume, easy to process at variously-shaped, and with do not deliquesce, property
The advantages that energy stabilization, radiation resistance, short, cheap die-away time, can be used for realizing that neutron, gamma ray and charged particle measure
And radiant image, it is very common scintillator type in flash detection and radiant image application.
According to the difference for measuring radiation field type and feature, scintillator and light in scintillation detector and radiation image-forming system
There are two different coupled modes for electrical part.Be in close contact one is scintillator and photoelectric device or by optical coupled oil/
Light guide couples；Another kind is that scintillator is separated by a distance with photoelectric device, passes through air or vacuum couplings；Using the first side
When formula, coupling efficiency is high, and photoelectric device receives the range that the fluorescence angle of emergence almost covers -90 °~+90 °, fluorescence shooting angle
Distribution influences scintillation detector and radiation image-forming system performance relatively small；But photoelectric device and sudden strain of a muscle under this coupled modes
Bright body is in similar position, and photoelectric device, which is easy directly to be shone by radiation, forms interference background, or even photoelectric device function occurs
Not normal or damage.When using second of coupled modes, photoelectric device avoids beam channel, can effectively avoid ray or radiation grain
The straight of son shines interference, it is ensured that detection system safety and the signal-to-noise ratio that can improve measurement result, this mode are one kind in impulse radiation
Common coupled modes in field diagnosis, transient process radiant image.But when using the second way, coupling efficiency is low, light
Electrical part can only receive the fluorescence being emitted in a smaller solid angle, therefore the angle distribution of blinking, light
Electrical part is with scintillator relative position to the detection efficient of scintillation detector and radiation image-forming system, sensitivity, signal-to-noise ratio, time
There is great influence with performances such as spatial discriminations, if the angle of emergence distribution of scintillator fluorescence can be regulated and controled, fluorescence is made to be more concentrated at
It is emitted towards photoelectric detector direction, then can improve the property such as signal-to-noise ratio, sensitivity, the time-space resolution of detection system
Energy.
On a microscopic level, the fluorescence that the scintillator centre of luminescence generates is uniformly emitted to space all directions.To thin
Sheet scintillator, the fluorescence for macroscopically showing as scintillator outgoing obey Lambertian distribution in space, i.e. exit facet normal is (vertical
In exit facet) fluorescence intensity in the directions θ is proportional to cos θ, that is, passage of scintillation light be emitted in normal direction it is most strong.Usually, it flickers
Body is placed perpendicular to ray incident direction, photoelectric detector deviation ray incident angle direction (namely scintillator plane normal
Direction) and blinking is received outside certain distance, only there are one the passage of scintillation light being emitted in very little spatial angle range to enter
The passage of scintillation light of detector, other directions is then wasted, and detected fluorescence is not also possible to through adjacent material scattering to detector
Interference background is formed, which has limited the promotions of the performances such as scintillation detector and radiation image-forming system detection efficient, signal-to-noise ratio.
To improve the luminescent properties of scintillator, micro-nano photonics achievement is introduced into radiation detection field at present, it is real
The regulation and control of existing scintillator radioluminescence performance.The patent of invention of Publication No. CN105204191A discloses a kind of total based on guided mode
The directionality regulation and control method shaken, such method have very thin scintillator the light emitting direction ability of regulation and control of height.But
Guide mode resonance Regulation Mechanism is photon crystal structure, may be only available for the case where light emitting layer thickness is less than wavelength of fluorescence, general energy
The flashing layer thickness enough regulated and controled is at hundreds of nanometers or less；The patent of invention of Publication No. CN 104280761A discloses one
The method that kind uses photon crystal surface structure, the method improve scintillator light output efficiency, but due to scintillator thickness
Much larger than the wavelength of fluorescence of transmitting, photonic crystal is limited in scope to angle direction regulation and control suitable thicknesses, has actual application value
Scintillator size ratio photonic crystal size it is much larger, scintillator different location shine exist under photon crystal structure regulation and control it is big
Amount pattern, the fluorescence shooting angle of each layer is distributed and is averaged after regulation and control, and all angles direction is all enhanced, and sudden strain of a muscle is finally improved
Bright body entirety light output can not change the angle distribution of scintillator outgoing fluorescence but.
The scintillator of practical application must be with certain thickness (generally higher than 100 μm) in flash detection and radiant image
Body shape scintillator because total photon numbers that scintillator thickness generates the detection efficient of ray and effect have decisive work
With to realize the regulation and control of block shape scintillator light emission direction, it is necessary to use new structure and design method.
Invention content
The present invention provides a kind of plastic scintillant and preparation method thereof of the surface with microlens array, existing for solving
Flash detection in the case that scintillator is detached with photoelectric device in radiation image-forming system, photoelectric device receive fluorescence efficiency it is low,
The limited problem of system performance.The present invention is distributed by microlens array structure regulating plastic scintillant light emitting anger, makes scintillator
Fluorescence is improving in face of photoelectric device solid angle direction outgoing efficiency highest to improve the photon numbers of photoelectric device reception
The sensitivity of flash detection and radiation image-forming system and the signal-to-noise ratio of measurement result.
Technical solution of the invention is：
A kind of surface has the plastic scintillant of microlens array, including plastic scintillant, the plastic scintillant surface
It is additionally provided with microlens array, the microlens array is made of multiple hemispherical beads, and is in hexagonal between hemisphere and hemisphere
Shape dense packing；The small ball's diameter of the microlens array is 4~10 μm；The thickness of the plastic scintillant is more than or equal to 10 μ
m。
Further, the matrix material of the plastic scintillant is identical with the material of microlens array, can keep in this way
The consistent matching of scintillator and microlens array refractive index can also utilize the thermoplasticity of material itself to dodge lenticule and plastics
Bright body closely, be securely joined with.
Further, the matrix material of the plastic scintillant is polystyrene, and the first luminescent substance of doping includes pair
Terphenyl or PBD, the second luminescent substance include POPOP or BBO, and the microlens array is by hemispherical polystyrene sphere group
At.
Further, the plastic scintillant is cylindric or rectangular-shape.
Meanwhile Preparation Method of the above-mentioned surface with microlens array Plastic scintillation system is prepared the present invention also provides a kind of,
Include the following steps：
1) prepare silicon chip；
Dodecane methylsulfuric acid sodium solution is prepared, it is small that the silicon chip of surfacing is statically placed in placement 24~48 in the solution
When, then Wafer Cleaning is dried for standby；
2) microspheres solution is prepared；
Choose 4~10 μm of microsphere diameter, the microballoon suspension that mass fraction is 2.5 ± 0.1% and absolute ethyl alcohol press 1:2~
1:5 volume ratios mix, and form microspheres solution；
3) micro-sphere array is formed；
The microspheres solution point of preparation is dripped on silicon chip, waiting solution is spread apart on silicon chip and moisture is waved completely in solution
Hair, silicon chip surface form micro-sphere array；
4) micro-sphere array is detached with silicon chip；
Make silicon chip be attached with the one of micro-sphere array to face upward, silicon chip is put into deionized water, micro-sphere array and silicon chip are made
It is gradually disengaged under hydrone effect, and swims on the water surface micro-sphere array structure for being self-assembly of dense packing；
5) micro-sphere array is transferred on plastic scintillant；
Plastic scintillant surface treatment is clean, so that plastic scintillant side is first entered water, scintillator is moved into microballoon battle array
Row lower section picks up then up, waits for that surface moisture volatilizees naturally, and micro-sphere array adheres completely to plastic scintillant surface；
6) micro-sphere array thermoplastic deformation forms microlens array；
It keeps the one side that plastic scintillant is attached with micro-sphere array upward, plastic scintillant and micro-sphere array is heated to
30~50min is kept after 110~130 DEG C, waits for natural cooling to get having the Plastic scintillation of microlens array structure to surface
Body.
Further, dodecane methylsulfuric acid sodium solution is prepared in the step 1), be prepare mass fraction be 5%~
8% dodecane methylsulfuric acid sodium solution.
Further, plastic scintillant is surface-treated totally in the step 5), being will using nitrogen or dry air
Plastic scintillant surface is blown clean.
Further, in the step 6), 30 are kept after plastic scintillant and micro-sphere array are heated to 110~130 DEG C
~50min is that plastic scintillant and micro-sphere array are put into culture dish, and then culture dish is put into freeze-day with constant temperature babinet,
And to oven heat to 30~50min of holding after 110~130 DEG C.
Compared with prior art, the present invention having the following technical effects：
1. the present invention provides a kind of plastic scintillant of the surface with microlens array, microlens array can significantly improve
The luminous intensity of plastic scintillant in particular directions obtains the regulation and control of flashing directionality, is deviateing scintillator surface method
The luminous intensity for substantially enhancing scintillator when line direction can significantly improve under conditions of scintillator is detached with photoelectric device
The performance parameters such as the detection efficient of scintillation detector and radiation image-forming system, sensitivity and signal-to-noise ratio.
2. present invention improves over microballoon self-assembling method prepare microlens array structure in scintillator surface, pass through heating
Polystyrene microsphere is set to soften to form hemispherical microlenses array structure and be combined firm, preparation method with scintillator bulk material
Simply, equipment requirement is low, can be used in the preparation of large area microlens array plastic scintillant, meets flash detection and radiant image
To flickering the requirement of bulk area.
3. in the method for the present invention step, by controlling heating temperature and heating time, it is desirable that heating can make microballoon just
Soften and be deformed under self gravitation effect the structure of approximate hemisphere, densely arranged formation lenticule battle array between hemisphere and hemisphere
Row, and the microlens array formed after softening is combined closely with plastic scintillant, forms firm entirety.
Description of the drawings
Fig. 1 is the structure chart of microlens array plastic scintillant in surface of the present invention；
Fig. 2 is surface microlens array plastic scintillant electron-microscope scanning top view of the present invention；
Fig. 3 is surface microlens array plastic scintillant marginal portion of the present invention electron-microscope scanning oblique view；
Fig. 4 is microlens array plastic scintillant in surface of the present invention and does not do the fluorescence outgoing of microlens array reference sample
Angle distribution covers snap gauge and intends result figure；
Fig. 5 is microlens array plastic scintillant in surface of the present invention and does not do the fluorescence outgoing of microlens array reference sample
Angle is distributed actual test result figure.
Reference numeral：1- plastic scintillants, 2- microlens arrays.
Specific implementation mode
The present invention improves signal-to-noise ratio for scintillator and flash detection under photoelectric device separation condition and radiation image-forming system
With the demand of sensitivity, it is proposed that a kind of surface has the plastic scintillant of microlens array, this regulation and control plastic scintillant hair of base
Light directionality.Microlens array is the spherical surface of certain amount micro/nano-scale or the permutation and combination of free-form surface lens, and it is special to have
Optical function, be widely used in the fields such as optical storage, optic communication, integration imaging.The microlens array period is generally sub-micron extremely
Hundred microns, production method has grayscale mask method, sol-gal process, exchange of particles method, pressure sintering, laser direct-writing method etc., still
These methods are not suitable for preparing microlens array on plastic scintillant surface, or prepare large area microlens array
Cost it is excessively high, general Study is difficult to undertake.The present invention improves photonic crystal arrays structure self-assembling method, can be with Cheap highly effective
Ground prepares large area microlens array, is particluarly suitable for plastic scintillant surface and prepares microlens array structure, measured result table
Its light emission direction of the plastic scintillant of bright surface microlens array has obtained apparent regulation and control.
As shown in Figure 1, surface provided by the invention has microlens array plastic scintillant, including plastic scintillant 1, modeling
1 surface of material scintillator, which makes, has microlens array 2, microlens array 2 to be made of multiple hemispherical polystyrene microspheres, polyphenyl second
A diameter of 4~10 μm of alkene microballoon, array are hexagonal closs packing arrangement.
2 period of microlens array of formation finally determines that selection gist is as follows by polystyrene microsphere diameter：To avoid
Spectrum distortion effect caused by photonics diffractive structure, micro-sphere structure size must be considerably larger than the wavelength of fluorescence of scintillator.For modeling
Expect that scintillator 1, transmitting spectrum wavelength are 300~500nm, by 10 times of considerations of wavelength, microsphere diameter minimum dimension takes 4 μm；And this
Invention prepares microlens array using improved self-assembling method, the largest of about 10 μm of the microsphere diameter that can be applicable in, microsphere diameter
It is excessive then cannot method using the present invention prepare.
Plastic scintillant 1 is cylindric or rectangular-shape, and thickness should be greater than being equal to 10 μm.Limit minimum plastic scintillant
Thickness value one is because of detection efficient needs, and one is easy for realizing that light emission direction regulates and controls using lenticule.Exist for energy
The about several microns of its range in substance of the heavy ion of 1MeV or more, penetration range is then in substance for neutron, gamma ray etc.
Generally higher than 1mm increases total number of photons of scintillator output, it is desirable that Plastic scintillation to improve ray and scintillator functioning efficiency
Body thickness is more than 10 μm.On the other hand, for thinner scintillator, such as submicron film shines, micro- using photonic crystal
Structure and corresponding method are easier to realize the regulation and control of light emission direction.Therefore, the present invention is more than 10 μm primarily directed to thickness
Macroscopical scintillator.
Its host material of plastic scintillant is polystyrene, and the first luminescent substance of doping includes p-terphenyl or PBD (2-
(4- xenyls) -5- phenyl oxadiazoles), the second luminescent substance be include POPOP (bis- [2- (5- phenyl) oxazolyl] benzene of Isosorbide-5-Nitrae -)
Or BBO (2,5 bis- (the bis- phenyl of 4-) oxazoles).Polystyrene is a kind of common matrix in plastic scintillant, refractive index 1.59,
The present invention microlens array be also by polystyrene self assembly processing constitute, herein mainly limit plastic scintillant matrix at
Part, plastic scintillant matrix components can be consistent with lenticule ingredient, can keep scintillator and microlens array refractive index in this way
Consistent matching, can also utilize material itself thermoplasticity by lenticule with plastic scintillant closely, be securely joined with.
The present invention also provides the preparation methods that a kind of surface has the Plastic scintillation system of microlens array, and step is such as
Under：
Step 1 prepares silicon chip：
The dodecane methylsulfuric acid sodium solution that mass fraction is 5%~8% is prepared, the silicon chip of surfacing is statically placed in this
It places 24~48 hours in solution, is then dried for standby Wafer Cleaning；
Step 2 prepares polystyrene microsphere solution：
Choose 4~10 μm of microsphere diameter, polystyrene microsphere turbid liquid and the anhydrous second that mass fraction is 2.5 ± 0.1%
Alcohol is according to 1:2~1:5 volume ratios mix, and form uniform polystyrene microsphere solution；
Step 3 forms polystyrene microsphere array：
Prepared microspheres solution point is dripped on the silicon chip after cleaning, drying, solution is waited for fully to be spread apart on silicon chip
And moisture volatilizees completely in solution, silicon chip surface forms polystyrene microsphere array；
Step 4 polystyrene microsphere array is detached with silicon chip：
So that silicon chip is attached with polystyrene microsphere array one side upward, silicon chip is slowly put into deionized water, polyphenyl is made
Ethylene micro-sphere array is gradually disengaged with silicon chip under hydrone effect, and is swum on the water surface and be self-assembly of the micro- of dense packing
Spherical array array structure.
Polystyrene microsphere array is transferred on plastic scintillant by step 5：
Plastic scintillant surface is blown clean using nitrogen or dry air, so that scintillator side is first entered water, gently
Scintillator is moved into below micro-sphere array and then slowly picks up upwards by ground, waits for that surface moisture volatilizees naturally, polystyrene microsphere
Array adheres completely to plastic scintillant surface.
Step 6 micro-sphere array thermoplastic deformation forms microlens array：
Plastic scintillant is kept to be attached with polystyrene microsphere array one side upward, by plastic scintillant and polystyrene
Micro-sphere array is put into culture dish, and then culture dish is put into freeze-day with constant temperature babinet, and to oven heat to 110~130
30~50min is kept after DEG C, waits for that natural cooling takes out culture dish to get having the Plastic scintillation for microlens structure to surface
Body.
In foregoing invention step silicon chip processing, solution prepare and etc. main technique on LYSO scintillators from group
The technique that dress method makes surface photon crystal microstructure is identical, but makes microlens array method in plastic scintillant
In step, polystyrene diameter and operating procedure are different, this is that microlens array characteristic requirements are determined, it is often more important that
Insulating box body temperature and heating time setting are controlled in step 6, it is desirable that heating can make polystyrene microsphere softening simultaneously just
The structure of approximate hemisphere is deformed under self gravitation effect, densely arranged formation microlens array between hemisphere and hemisphere, and
And the microlens array formed after softening is combined closely with plastic scintillant, forms firm entirety.If warm in thermostatic box
It is too short to spend too low or soaking time, then is insufficient to allow polystyrene microsphere to soften to form semiglobe；If in thermostatic box
Temperature is too high or soaking time is long, then polystyrene microsphere array continues to softening until forming one in scintillator surface
The smooth film of layer, will not have microlens array regulatory function.
One face of scintillator is disposed with microlens structure, and another face (bottom interface) is that do not have structured plane,
Will produce total reflection effect when the light more than total reflection angle reaches bottom interface, reflected light be up to upper surface with it is micro-
It is emitted again after lensing, and the light being totally reflected belongs to the light of wide-angle, therefore seen on overall effect, by the outgoing of lenticule
Fluorescence in wide-angle emergent light have larger weight, it is achieved that the redistribution to fluorescent emission directionality.Except this
Except, lenticule allows the fluorescence that the fluorescence of roundtrip cannot be emitted between upper and lower two surfaces a part of originally to emit
Out, in terms of final effect, total light output of scintillator also improves.For scintillator fluorescence outgoing intensity and angle under structure
Distribution situation needs to simulate to obtain using monte carlo method.
Embodiment one：
A kind of surface has a microlens array plastic scintillant, including plastic scintillant and connects after melting with Plastic scintillation body heat
The microlens array being connected together.
In the present embodiment, the host material of plastic scintillant is polystyrene, and the first luminescent substance is p-terphenyl, second
Luminescent substance is POPOP.The cylinder of a diameter of 30mm of plastic scintillant, thickness 1mm.A diameter of 4 μ that microlens array is selected
M polystyrene spheres, are prepared using self-assembling method, by heating and thermal insulation treated polystyrene sphere in itself weight
It is deformed near hemispherical under force effect, and the polystyrene after melting at hexagon dense packing, heat between hemisphere and hemisphere
Hemisphere is closely securely combined together with Plastic scintillation ontology.
The surface microlens array Plastic scintillation production procedure of the present embodiment is as follows：
1. preparing silicon chip：The dodecane methylsulfuric acid sodium solution that mass fraction is 5% is prepared, silicon chip is put into the solution
It is taken out after standing 24 hours, cleans drying；
2. preparing polystyrene microsphere solution：Choose 4 μm of microsphere diameter, the polystyrene microsphere that mass fraction is 2.5%
Suspension presses volume 1 with absolute ethyl alcohol:2 ratio mixing, forms polystyrene microsphere solution after shaking up；
3. forming polystyrene microsphere array：Prepared microspheres solution point is dripped on the silicon chip after cleaning, drying, etc.
Wait for that solution is fully spread apart on silicon chip and moisture volatilizees completely in solution, silicon chip surface forms polystyrene microsphere array；
4. detaching micro-sphere array and silicon chip：So that silicon chip is had polystyrene microsphere array one side upward, silicon chip is slowly put into
In deionized water, polystyrene microsphere array is gradually disengaged with silicon chip under hydrone effect, and swims in self assembly on the water surface
Form the micro-sphere array structure of dense packing；
5. shifting micro-sphere array：Plastic scintillant surface is blown clean using nitrogen, makes scintillator side oblique water entry, gently
Scintillator is moved into below micro-sphere array by ground, keep plastic scintillant end face upwards slowly by plastic scintillant from water to
On pick up, wait for plastic scintillant surface moisture volatilize naturally, polystyrene microsphere array is attached to plastic scintillant surface；
6. preparing microlens array：It is put into thermostatic drying chamber after plastic scintillant is fitted into culture dish, keeps being attached with
Polystyrene microsphere array one side upward, controls after dry the temperature inside the box is heated to 120 DEG C and keeps 35min, then disconnect and adding
Heat makes babinet natural cooling, and it is to obtain surface to have the plastic scintillant of microlens array structure to take out sample.
Fig. 2 and Fig. 3 is the shape appearance figure of the surface microlens array structural plastic scintillator for preparing under scanning electron microscope, Fig. 2
For the top view in microlens array region, Fig. 3 is the oblique view of sample edge part, and the polystyrene microsphere after heating and thermal insulation is soft
Change and form approximate hemispheric structure, hemispherical dome structure dense packing is at microlens array；The region shown in Fig. 3 is located at sample
Product edge, subregion can not be covered with microlens structure.
It is soft using the model Carlow based on ray tracing according to the surface micro-structure plastic scintillant geometric configuration of preparation
Part simulates fluorescence angle of emergence distribution of the scintillator internal illumination outside surface.When simulation, set the refractive index of sample as
1.59, external environment is the air that refractive index is 1.0, the scintillator lower surface of consideration and the fluorescent reflection of side.As a comparison,
Simulate the plastic scintillant reference sample light emitting anger distribution of no microlens array.Fig. 4 is analog result, wherein 0 ° of angular direction is
Plastic scintillant surface normal direction, as a result upper emissive porwer is maximum at 41 ° for plastic scintillant of the display with microlens array,
Its emissive porwer is 2.5 times of reference sample in the angle.
Fig. 5 show surface microlens array plastic scintillant and reference sample x-ray excitation under luminous intensity with
The variation relation of angle, consistent with analog result, measured result shows fluorescence intensity and the strong depend-ence of shooting angle closes
System.The experimental results showed that sample is at 43 °, upper emissive porwer is maximum, and emissive porwer is 2.7 times of reference sample in the angle.
The angle direction and enhancing ratio and analog result of outgoing maximum intensity are almost the same, but there are a little deviation, this possible samples
Defect when prepared by product and when measurement in caused by position inaccurate.
Surface microlens array prepared by self-assembling method of the present invention is realized well to plastic scintillant luminous intensity
With the modulation of angular dependence, realize in off-normal larger angle direction maximum, and 2.7 are enhanced than reference sample
Times.When applied to flash detection and radiation image-forming system, can significantly improve corresponding angle orientation sensing system sensitivity and
Signal-to-noise ratio, lifting system performance are measured, correlated results modulates the fluorescence of other flicker class sensitive detection parts with angular dependence
It is worth with important inspiration.
Embodiment two：
In the present embodiment, the host material of plastic scintillant is polystyrene, and the first luminescent substance is PBD, and second shines
Substance is BBO.Plastic scintillant width is the cuboid of 30mm, thickness 3mm.A diameter of 8 μm of polyphenyl that microlens array is selected
Ethylene bead, is prepared using self-assembling method, is made in its own gravity by heating and thermal insulation treated polystyrene sphere
It is deformed near hemispherical under, and the polystyrene hemisphere after melting at hexagon dense packing, heat between hemisphere and hemisphere
It is closely securely combined together with Plastic scintillation ontology 1.
The surface microlens array Plastic scintillation production procedure of the present embodiment is as follows：
1. preparing silicon chip：The dodecane methylsulfuric acid sodium solution that mass fraction is 5% is prepared, silicon chip is put into the solution
It is taken out after standing 36 hours, cleans drying；
2. preparing polystyrene microsphere solution：Choose 10 μm of microsphere diameter, the polystyrene microsphere that mass fraction is 2.5%
Suspension presses volume 1 with absolute ethyl alcohol:5 ratio mixing, forms polystyrene microsphere solution after shaking up；
3. forming polystyrene microsphere array：Prepared microspheres solution point is dripped on the silicon chip after cleaning, drying, etc.
Wait for that solution is fully spread apart on silicon chip and moisture volatilizees completely in solution, silicon chip surface forms polystyrene microsphere array；
4. detaching micro-sphere array and silicon chip：So that silicon chip is had polystyrene microsphere array one side upward, silicon chip is slowly put into
In deionized water, polystyrene microsphere array is gradually disengaged with silicon chip under hydrone effect, and swims in self assembly on the water surface
Form the micro-sphere array structure of dense packing；
5. shifting micro-sphere array：Plastic scintillant surface is blown clean using nitrogen, makes scintillator side oblique water entry, gently
Scintillator is moved into below micro-sphere array by ground, keep plastic scintillant end face upwards slowly by plastic scintillant from water to
On pick up, wait for plastic scintillant surface moisture volatilize naturally, polystyrene microsphere array is attached to plastic scintillant surface；
6. preparing microlens array：It is put into thermostatic drying chamber after plastic scintillant is fitted into culture dish, keeps being attached with
Polystyrene microsphere array one side upward, controls after dry the temperature inside the box is heated to 129 DEG C and keeps 45min, then disconnect and adding
Heat makes babinet natural cooling, and it is to obtain surface to have the plastic scintillant of microlens array structure to take out sample.
Claims (8)
1. a kind of surface has the plastic scintillant of microlens array, including plastic scintillant (1), it is characterised in that：The modeling
Material scintillator (1) surface is provided with microlens array (2), and the microlens array (2) is made of multiple hemispherical beads, and half
It is in hexagon dense packing between ball and hemisphere；
The small ball's diameter of the microlens array (2) is 4~10 μm；
The thickness of the plastic scintillant (1) is more than or equal to 10 μm.
2. surface according to claim 1 has the plastic scintillant of microlens array, it is characterised in that：The plastics dodge
The matrix material of bright body (1) is identical with the material of microlens array (2).
3. surface according to claim 2 has the plastic scintillant of microlens array, it is characterised in that：The plastics dodge
The matrix material of bright body (1) is polystyrene, and the first luminescent substance of doping includes p-terphenyl or PBD, the second luminescent substance
Including POPOP or BBO, the microlens array (2) is made of hemispherical polystyrene sphere.
4. surface according to claim 1 or 2 or 3 has the plastic scintillant of microlens array, it is characterised in that：It is described
Plastic scintillant (1) is cylindric or rectangular-shape.
5. a kind of preparation method for preparing the surface as described in Claims 1-4 is any and there is the plastic scintillant of microlens array,
It is characterized by comprising the following steps：
1) prepare silicon chip；
Dodecane methylsulfuric acid sodium solution is prepared, the silicon chip of surfacing is statically placed in the solution and places 24~48 hours, so
Wafer Cleaning is dried for standby afterwards；
2) microspheres solution is prepared；
Choose 4~10 μm of microsphere diameter, the microballoon suspension that mass fraction is 2.5 ± 0.1% and absolute ethyl alcohol press 1:2~1:5
Volume ratio mixes, and forms microspheres solution；
3) micro-sphere array is formed；
The microspheres solution point of preparation is dripped on silicon chip, waiting solution is spread apart on silicon chip and moisture volatilizees completely in solution,
Silicon chip surface forms micro-sphere array；
4) micro-sphere array is detached with silicon chip；
Make silicon chip be attached with the one of micro-sphere array to face upward, silicon chip is put into deionized water, makes micro-sphere array with silicon chip in water
It is detached under molecular action, and swims on the water surface micro-sphere array structure for forming dense packing from group；
5) micro-sphere array is transferred on plastic scintillant；
Plastic scintillant surface treatment is clean, so that plastic scintillant side is first entered water, scintillator is moved under micro-sphere array
Side picks up then up, waits for that surface moisture volatilizees naturally, and micro-sphere array adheres completely to plastic scintillant surface；
6) micro-sphere array thermoplastic deformation forms microlens array；
Plastic scintillant is kept to be attached with the one side of micro-sphere array upward, plastic scintillant and micro-sphere array are heated to 110~
30~50min is kept after 130 DEG C, waits for natural cooling to get having the plastic scintillant of microlens array structure to surface.
6. surface has the preparation method of the plastic scintillant of microlens array according to claim 5, it is characterised in that：Institute
It states and prepares dodecane methylsulfuric acid sodium solution in step 1), be the dodecane methyl sodium sulphate prepared mass fraction and be 5%~8%
Solution.
7. having the preparation method of the plastic scintillant of microlens array according to the surface of claim 5 or 6, feature exists
In：Plastic scintillant is surface-treated totally in the step 5), is to utilize nitrogen or dry air by plastic scintillant surface
It blows clean.
8. surface has the preparation method of the plastic scintillant of microlens array according to claim 7, it is characterised in that：Institute
It states in step 6), 30~50min is kept after plastic scintillant and micro-sphere array are heated to 110~130 DEG C, is by Plastic scintillation
Body and micro-sphere array are put into culture dish, and then culture dish is put into freeze-day with constant temperature babinet, and to oven heat to 110~
30~50min is kept after 130 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851832A (en) * | 2018-12-28 | 2019-06-07 | 中国科学院合肥物质科学研究院 | The method of the PS ball array of surface roughening is constructed on flexible substrates |
| CN111458738A (en) * | 2020-04-13 | 2020-07-28 | 同济大学 | Scintillator device regulated and controlled by surface micro-lens array structure and preparation thereof |
| CN113185628A (en) * | 2021-03-22 | 2021-07-30 | 中国辐射防护研究院 | Polystyrene scintillation microsphere and preparation method thereof |
| CN115656131A (en) * | 2022-11-08 | 2023-01-31 | 南京溯远基因科技有限公司 | Microarray shaping lens and fluorescence system for genetic detection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280761A (en) * | 2014-09-25 | 2015-01-14 | 同济大学 | High-light-extraction-efficiency scintillator realized by utilizing surface photon structure |
| US9103921B2 (en) * | 2012-09-24 | 2015-08-11 | Savannah River Nuclear Solutions, Llc | Photonic crystal scintillators and methods of manufacture |
| CN105068106A (en) * | 2015-07-03 | 2015-11-18 | 西北核技术研究所 | Scintillator photonic crystal structure and manufacturing method therefor |
| CN106842370A (en) * | 2016-12-21 | 2017-06-13 | 兰州空间技术物理研究所 | A kind of method for improving inorganic scintillation crystal light output |
-
2018
- 2018-04-25 CN CN201810380671.3A patent/CN108594288B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9103921B2 (en) * | 2012-09-24 | 2015-08-11 | Savannah River Nuclear Solutions, Llc | Photonic crystal scintillators and methods of manufacture |
| CN104280761A (en) * | 2014-09-25 | 2015-01-14 | 同济大学 | High-light-extraction-efficiency scintillator realized by utilizing surface photon structure |
| CN105068106A (en) * | 2015-07-03 | 2015-11-18 | 西北核技术研究所 | Scintillator photonic crystal structure and manufacturing method therefor |
| CN106842370A (en) * | 2016-12-21 | 2017-06-13 | 兰州空间技术物理研究所 | A kind of method for improving inorganic scintillation crystal light output |
Non-Patent Citations (2)
| Title |
|---|
| 任智斌: "折射型微透镜及微透镜阵列光学性质与制作技术的研究", 《中国博士学位论文全文数据库》 * |
| 汲长松: "《中子探测NEUTRON DETECTION》", 31 May 2014, 中国原子能出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851832A (en) * | 2018-12-28 | 2019-06-07 | 中国科学院合肥物质科学研究院 | The method of the PS ball array of surface roughening is constructed on flexible substrates |
| CN109851832B (en) * | 2018-12-28 | 2021-05-25 | 中国科学院合肥物质科学研究院 | Method for constructing surface roughened PS ball array on flexible substrate |
| CN111458738A (en) * | 2020-04-13 | 2020-07-28 | 同济大学 | Scintillator device regulated and controlled by surface micro-lens array structure and preparation thereof |
| CN113185628A (en) * | 2021-03-22 | 2021-07-30 | 中国辐射防护研究院 | Polystyrene scintillation microsphere and preparation method thereof |
| CN115656131A (en) * | 2022-11-08 | 2023-01-31 | 南京溯远基因科技有限公司 | Microarray shaping lens and fluorescence system for genetic detection |
| CN115656131B (en) * | 2022-11-08 | 2023-09-19 | 南京溯远基因科技有限公司 | Microarray plastic lens for genetic detection and fluorescence system |
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