CN106706565B - A kind of spiral light microfluidic sensor - Google Patents
A kind of spiral light microfluidic sensor Download PDFInfo
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- CN106706565B CN106706565B CN201611205223.7A CN201611205223A CN106706565B CN 106706565 B CN106706565 B CN 106706565B CN 201611205223 A CN201611205223 A CN 201611205223A CN 106706565 B CN106706565 B CN 106706565B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
- G01N2021/458—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods using interferential sensor, e.g. sensor fibre, possibly on optical waveguide
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Abstract
The invention discloses a kind of spiral light microfluidic sensors, dedicated for the sensing measurement of microfluid.Its constituted mode is, micro-nano fiber is wrapped in around annular microchannel, constitute uniform helical form periodic structure, the resonance between micro-nano fiber and miniflow waveguide in the same direction is inspired using the periodical effect of evanescent field to couple, and apparent resonance peak can be observed in micro-nano fiber output end transmitted spectrum.When miniflow ingredient changes, the effective refractive index of miniflow waveguide changes, and resonance wavelength is caused to generate drift, and the sensing to miniflow composition transfer is realized by the monitoring to resonance wavelength.Optical fiber and quartz capillary separately constitute complete photo-signal channel and miniflow access, and the highly sensitive low concentration that the various parameters such as biology, medicine, chemistry may be implemented quickly detects, and stability is high, at low cost, easy to operate.
Description
Technical field
The present invention relates to optical sensor technology fields, and in particular to a kind of spiral light microfluidic sensor.
Background technique
Light microfluidic technology is with photonics by microfluidic technology by subject crossing and the new technique for merging generation, is not
To realize the important channel of integrated, compact new type light source, tunable photonic device and unmarked type biochemical sensor.Light
The design philosophy of microfluidic sensor is, when designing optical sensing structure, the access way of framework miniflow to be considered how, by optics
Structure and microchannel be integrated to constitute the platform of optical signal and miniflow interaction, and realizes and change to miniflow biochemical composition
Measurement.Light microfluidic sensor combines the advantages that microchannel structure size is small, sample consumption is low, analysis throughput is high and optics
The high sensitivity of detection means, fast response time, flexibility be high, the these two aspects advantage such as low in energy consumption, in chemistry, biology, medicine
Etc. application have good development potentiality.
Currently, realizing that there are many mode of light microfluidic sensor.Using fiber bragg grating to the F-P cavity structure of formation,
The microchannel vertical with optical fiber light-guiding direction is constituted in substrate, and real-time monitoring is carried out to the liquid for flowing through F-P cavity.This knot
Structure principle is simple, and production is relatively easy, but due to the restriction by spatial stability, measurement accuracy is only 2 × 10-3.Photon
Multiple airports provide natural microchannel for liquid inside crystal optical fibre.It inserts the liquid into optical fiber, by band gap
The measurement of drift is, it can be achieved that the refractive index of high sensitivity senses.The inhomogeneities of multiple microchannel flow velocitys may cause survey
Error is measured, selective filling chooses single airport as microchannel, avoids this problem, but selective filling difficulty
It is higher, it is not easy to operate.Using the length advantage of optical fiber, the interaction strength of light and testing liquid can be sufficiently promoted, and most
Big unfavorable factor is that the path of optical signal mutually coincides with microchannel, it is difficult to take into account low-loss and the volume of optical signal
Low consumption.Itself is a ring resonators for annular microchannel, and there are also the three-dimensional prolongation structure micro-pipes and micro-nano of micro-loop
The resonant cavity of optical fiber composition, they use the micro-nano fiber vertical with microfluidic flow direction, carry out annular using evanescent field action
The excitation of chamber.By the observation drifted about to resonance peak in transmission spectrum, the measurement of liquid refractivity in microchannel is realized.So
And this scheme sensitivity needs to be further improved, and resonant excitation efficiency depends between micro-nano fiber and microchannel
Distance, spatial stability have larger impact to sensing optical signal.
All there are different advantage and disadvantage in the implementation method of the above various smooth microfluidic sensors, in order to improve light miniflow sensing
The monitoring capability of device needs to improve and redesign in principle and realization mechanism by it pushed even further towards functionization.
Summary of the invention
The purpose of the present invention is to solve drawbacks described above in the prior art, provide a kind of spiral light miniflow sensing
Device inspires the resonance between micro-nano fiber and miniflow waveguide in the same direction using the periodical effect of evanescent field and couples, obtains superelevation
The good sensor of sensitivity, temperature stability and structural compactness.
The purpose of the present invention can be reached by adopting the following technical scheme that:
A kind of spiral light microfluidic sensor, the spiral light microfluidic sensor includes micro-nano fiber and micro-nano quartz wool
Tubule,
Wherein, the micro-nano quartz capillary includes the first quartz capillary petiolarea 1, the second quartz capillary petiolarea 5, the
One micro-nano quartz capillary bores area 2, the second micro-nano quartz capillary bores area 4 and micro-nano quartz capillary homogeneity range 3, and described first
It is equal that micro-nano quartz capillary cone area 2 and the second micro-nano quartz capillary cone area 4 are located at the micro-nano quartz capillary
The both ends in even area 3, the first quartz capillary petiolarea 1 is located at the outer end in the first micro-nano quartz capillary cone area 2, described
Second quartz capillary petiolarea 5 is located at the outer end in the second micro-nano quartz capillary cone area 4；
Wherein, the micro-nano fiber include the first optical fiber petiolarea 6, the second optical fiber petiolarea 10, the first micro-nano fiber cone area 7,
Second micro-nano fiber bores area 9 and micro-nano fiber homogeneity range 8, the first micro-nano fiber cone area 7 and second micro-nano fiber cone
Area 9 is located at the both ends of the micro-nano fiber homogeneity range 8, and the first optical fiber petiolarea 6 is located at first micro-nano fiber cone
The outer end in area 7, the second optical fiber petiolarea 10 are located at the outer end in second micro-nano fiber cone area 9；
8 uniform winding of micro-nano fiber homogeneity range forms screw type on the micro-nano quartz capillary homogeneity range 3
Periodic structure, remaining each area of each area of remaining of the micro-nano fiber and micro-nano quartz capillary keeping parallelism everywhere
Relative positional relationship.
Further, the first quartz capillary petiolarea 1 and the second quartz capillary petiolarea 5 are respectively used to miniflow
The importing and export of body, through the first micro-nano quartz capillary cone area 2, the second micro-nano quartz capillary cone area 4 and institute
The microchannel for stating the composition of micro-nano quartz capillary homogeneity range 3 forms complete microfluidic channel system.
Further, the first optical fiber petiolarea 6 and the second optical fiber petiolarea 10 be respectively used to optical signal input or
Person's output bores area 7 and second micro-nano fiber cone area 9 through first micro-nano fiber and the spiral helicine micro-nano fiber is equal
The light-path that even area 8 forms forms complete photo-signal channel system.
Further, be connected when the first optical fiber petiolarea 6 with external light source input for optical signal when, described second
Optical fiber petiolarea 10 is connected with optical signal detecting equipment, the monitoring for output signal；When the second optical fiber petiolarea 10 and outside
Light source be connected the input for optical signal when, the first optical fiber petiolarea 6 is connected with optical signal detecting equipment, be used for output signal
Monitoring.
Further, the optical signal detecting equipment includes spectrometer or photoelectric detector.
Further, be connected when the first quartz capillary petiolarea 1 with sample injector or peristaltic pump for sample into
Fashionable, the second quartz capillary petiolarea 5 is for being discharged remaining sample in capillary；When second quartz capillary end
Area 5 be connected with sample injector or peristaltic pump the entrance for sample when, the first quartz capillary petiolarea 1 is for being discharged capillary
Remaining sample in managing.
Further, the micro-nano quartz capillary and internal microfluid form a waveguiding structure, and and helical form
The micro-nano fiber mutually by generating stronger evanescent field action, when miniflow ingredient changes, effective folding of miniflow waveguide
The rate of penetrating changes, and resonance wavelength is caused to generate drift, and the sense to miniflow composition transfer is realized by the monitoring to resonance wavelength
It surveys.
Further, the micro-nano fiber and the micro-nano quartz capillary are applied by optical fiber and quartz capillary removal respectively
Fused biconical taper is formed after coating.
The present invention has the following advantages and effects with respect to the prior art:
A kind of spiral light microfluidic sensor disclosed by the invention, is exclusively used in the sensing measurement of microfluid, has sensitivity
High, temperature stability and good, the compact-sized advantage of spatial stability, can be used for the biography of the parameters such as various biologies, medicine, chemistry
Sensed quantity, it is low in cost, easy to operate.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of spiral light microfluidic sensor disclosed by the invention；
Wherein, the first quartz capillary of 1--- petiolarea, 2--- the first micro-nano quartz capillary bore area, 3--- micro-nano quartz wool
Tubule homogeneity range, 4--- the second micro-nano quartz capillary bore area, 5--- the second quartz capillary petiolarea, the first optical fiber end of 6---
Area, the first micro-nano fiber of 7--- bore area, 8--- micro-nano fiber homogeneity range, and the second micro-nano fiber of 9--- bores area, the second optical fiber of 10---
Petiolarea.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Embodiment
Fig. 1 is a kind of structural schematic diagram of spiral light microfluidic sensor disclosed by the invention, as shown in Figure 1, a kind of spiral shell
Rotating smooth microfluidic sensor removes fused biconical taper after coat by optical fiber and quartz capillary respectively, and being formed has a scale
Micro-nano fiber is wrapped in micro-nano quartz capillary, the periodic structure of formation by very little micro-nano fiber and micro-nano quartz capillary.
The structure of micro-nano quartz capillary includes the first quartz capillary petiolarea 1, the second quartz capillary petiolarea 5, first
Micro-nano quartz capillary bores area 2, the second micro-nano quartz capillary cone area 4 and micro-nano quartz capillary homogeneity range 3,
The structure of micro-nano fiber includes the first optical fiber petiolarea 6, the second optical fiber petiolarea 10, the first micro-nano fiber cone area 7, second
Micro-nano fiber bores area 9 and micro-nano fiber homogeneity range 8, and micro-nano fiber homogeneity range 8 is wrapped in the formation of micro-nano quartz capillary homogeneity range 3
Screw type periodic structure, micro-nano fiber remaining each area (first optical fiber petiolarea 6, the second optical fiber petiolarea 10, the first micro-nano fiber
Bore area 7, the second micro-nano fiber bores area 9) remaining each area's (first 1, second quartz of quartz capillary petiolarea with micro-nano quartz capillary
Capillary petiolarea 5, the first micro-nano quartz capillary cone area 2, the second micro-nano quartz capillary bore area 4) phase of keeping parallelism everywhere
To positional relationship, spiral light microfluidic sensor is just formd in this way.
Micro-nano quartz capillary and internal microfluid form a waveguiding structure, mutually lean on spiral helicine micro-nano fiber,
Close structure generates stronger evanescent field action, and the light in resonance wave strong point, spiral helicine micro-nano fiber can be coupled to micro-
In circulation road, loss peak is formed in transmission spectrum, due to the periodic structure of spiral helicine micro-nano fiber, in certain wave strong point
It can been significantly enhanced, when miniflow ingredient changes, the effective refractive index of miniflow waveguide changes, and causes resonance wavelength
Drift is generated, the sensing to miniflow composition transfer is realized by the monitoring to resonance wavelength.
Wherein, the first optical fiber petiolarea 6 and the second optical fiber petiolarea 10 are respectively used to the input or output of optical signal, through first
The light-path of micro-nano fiber cone area 7 and the second micro-nano fiber cone area 9 and spiral helicine micro-nano fiber homogeneity range 8 composition is formed completely
Photo-signal channel system.
In concrete application, the first optical fiber petiolarea 6 or the second optical fiber petiolarea 10 are connected with external light source and are used for optical signal
Input, another second optical fiber petiolarea 10 or the first optical fiber petiolarea 6 are set with optical signal detectings such as spectrometer or photoelectric detectors
It is standby to be connected, for the monitoring of output signal, form complete photo-signal channel system.
Wherein, the first quartz capillary petiolarea 1 and the second quartz capillary petiolarea 5 are respectively used to the importing of microfluid and lead
Out, through 3 groups of the first micro-nano quartz capillary cone area 2, the second micro-nano quartz capillary cone area 4 and micro-nano quartz capillary homogeneity range
At microchannel form complete microfluidic channel system.
In concrete application, by the first quartz capillary petiolarea 1 or the second quartz capillary petiolarea 5 and sample injector or wriggling
Pump is connected, and for the entrance of sample, another second quartz capillary petiolarea 5 or the first quartz capillary petiolarea 1 are for being discharged
Remaining sample in capillary, forms the microfluidic channel system of independent completion.
In conclusion it is exclusively used in the sensing measurement of microfluid present embodiment discloses a kind of spiral light microfluidic sensor,
The sensor inspires the resonance between micro-nano fiber and miniflow waveguide in the same direction using the periodical effect of evanescent field and couples, and obtains
Hypersensitivity, fabulous temperature stability and structural compactness can be used for the sensing of the parameters such as various biologies, medicine, chemistry
Measurement, it is low in cost, easy to operate.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (5)
1. a kind of spiral light microfluidic sensor, which is characterized in that the spiral light microfluidic sensor include micro-nano fiber and
Micro-nano quartz capillary,
Wherein, the micro-nano quartz capillary includes the first quartz capillary petiolarea (1), the second quartz capillary petiolarea (5), the
One micro-nano quartz capillary bores area (2), the second micro-nano quartz capillary cone area (4) and micro-nano quartz capillary homogeneity range (3), institute
It states the first micro-nano quartz capillary cone area (2) and the second micro-nano quartz capillary cone area (4) is located at the micro-nano stone
The both ends of English capillary homogeneity range (3), the first quartz capillary petiolarea (1) are located at the first micro-nano quartz capillary cone
The outer end in area (2), the second quartz capillary petiolarea (5) are located at the outer end of the second micro-nano quartz capillary cone area (4)；
Wherein, the micro-nano fiber includes the first optical fiber petiolarea (6), the second optical fiber petiolarea (10), the first micro-nano fiber cone area
(7), the second micro-nano fiber cone area (9) and micro-nano fiber homogeneity range (8), first micro-nano fiber bore area (7) and described second
Micro-nano fiber cone area (9) is located at the both ends of the micro-nano fiber homogeneity range (8), and the first optical fiber petiolarea (6) is located at institute
The outer end of the first micro-nano fiber cone area (7) is stated, the second optical fiber petiolarea (10) is located at second micro-nano fiber cone area (9)
Outer end；
The first optical fiber petiolarea (6) and the second optical fiber petiolarea (10) are respectively used to the input or output of optical signal, warp
First micro-nano fiber cone area (7) and second micro-nano fiber cone area (9) and the spiral helicine micro-nano fiber homogeneity range
(8) light-path formed forms complete photo-signal channel system；
When the first quartz capillary petiolarea (1) is connected with sample injector or peristaltic pump the entrance for sample, described
Two quartz capillary petiolareas (5) are for being discharged remaining sample in capillary；When the second quartz capillary petiolarea (5) with into
Sample device or peristaltic pump be connected the entrance for sample when, the first quartz capillary petiolarea (1) is for being discharged in capillary
Remaining sample；
The micro-nano quartz capillary and internal microfluid form a waveguiding structure, and with the spiral helicine micro-nano fiber
Mutually by generating stronger evanescent field action, when miniflow ingredient changes, the effective refractive index of miniflow waveguide changes, and draws
It plays resonance wavelength and generates drift, the sensing to miniflow composition transfer is realized by the monitoring to resonance wavelength；
Micro-nano fiber homogeneity range (8) uniform winding forms screw type on the micro-nano quartz capillary homogeneity range (3)
Periodic structure, remaining each area of each area of remaining of the micro-nano fiber and micro-nano quartz capillary keeping parallelism everywhere
Relative positional relationship.
2. a kind of spiral light microfluidic sensor according to claim 1, which is characterized in that first quartz capillary
Petiolarea (1) and the second quartz capillary petiolarea (5) are respectively used to the importing and export of microfluid, through the first micro-nano stone
English capillary bores area (2), the second micro-nano quartz capillary cone area (4) and micro-nano quartz capillary homogeneity range (3) group
At microchannel form complete microfluidic channel system.
3. a kind of spiral light microfluidic sensor according to claim 2, which is characterized in that when the first optical fiber petiolarea
(6) be connected with external light source input for optical signal when, the second optical fiber petiolarea (10) is connected with optical signal detecting equipment,
Monitoring for output signal；When the second optical fiber petiolarea (10) is connected with external light source the input for optical signal, institute
It states the first optical fiber petiolarea (6) to be connected with optical signal detecting equipment, the monitoring for output signal.
4. a kind of spiral light microfluidic sensor according to claim 3, which is characterized in that the optical signal detecting equipment
Including spectrometer and photoelectric detector.
5. a kind of spiral light microfluidic sensor according to any one of claims 1 to 4, which is characterized in that
The micro-nano fiber and the micro-nano quartz capillary after optical fiber and quartz capillary removal coat respectively by melting
Draw taper at.
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| CN108872110B (en) * | 2018-07-04 | 2020-12-11 | 暨南大学 | High-refractive-index-sensitivity optical fiber micro-flow sensor and preparation method thereof |
| CN110160960A (en) * | 2019-06-22 | 2019-08-23 | 南昌航空大学 | Micro-nano fiber biosensor and preparation method thereof based on coupler structure |
| CN112378857B (en) * | 2020-11-13 | 2023-08-01 | 暨南大学 | Micro-nano fiber grating photo-thermal test strip sensor and detection method thereof |
| CN113376095B (en) * | 2021-05-08 | 2022-10-18 | 邯郸学院 | Signal integrated optical micro-flow sensor |
| CN113433611B (en) * | 2021-06-29 | 2022-08-16 | 暨南大学 | Spiral-structure type long-period optical fiber grating interferometer and manufacturing method thereof |
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