CN209459675U - A kind of three-decker D-type optical fiber spr sensor - Google Patents
A kind of three-decker D-type optical fiber spr sensor Download PDFInfo
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- CN209459675U CN209459675U CN201920571607.3U CN201920571607U CN209459675U CN 209459675 U CN209459675 U CN 209459675U CN 201920571607 U CN201920571607 U CN 201920571607U CN 209459675 U CN209459675 U CN 209459675U
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Abstract
The utility model discloses a kind of three-decker D-type optical fiber spr sensors, including D-type optical fiber, the D-type optical fiber is the optical fiber containing D type section, Duan Weiyi sections of radial sections of the D type are the fiber segment of D type, the fibre core of D type section is exposed in the plane of D type section, and the plane of D type section is successively arranged the first gold nano grain layer, curing tungsten layer and the second gold nano grain layer from the bottom to top.The utility model is with WS2Layer is used as nano-space, and SPR also can be enhanced by the highly reinforcing localized electromagnetic field that the nano gap between plane nano structure generates, improve sensor accuracy and sensitivity.
Description
Technical field
The utility model relates to optical SPR sensor fields, and in particular to a kind of three-decker D-type optical fiber spr sensor.
Background technique
Here statement only provides background information related with the utility model, without necessarily constituting the prior art.
Optical fiber sensing technology starts from the 1970s, developing rapidly with Fibre Optical Communication Technology, Fibre Optical Sensor skill
Art is to measure the important symbol of a national information degree.Fibre Optical Sensor, comprising to the perception of outer signals (measured) with
Transmit two kinds of functions.The perception that optical fiber SPR sensor carries out is that outer signals act on the light wave transmitted in optical fiber, measures quilt
Change physical features parameter, such as intensity, wavelength, frequency, phase and polarization state.It can be obtained by the measurement changed to optical parameter
To the synchronization change information of outer signals, this perception is substantially outer signals to the real-time of the light wave progress propagated in optical fiber
Modulation.
Surface plasma resonance technology (Surface Plasmon Resonance technology, SPR) is using SPR
Principle detects a kind of physical optics technology of ligand and analyte effect on bio-sensing chip.Surface plasma is by leading
Free electron at dielectric and insulator dielectric interface collective concussion generate, metal can approximation regard plasma as
Body, since electromagnetic viscosimeter forms plasma wave.When light is incident on optically thinner medium and optically denser medium surface to be greater than critical angle, by
The condition that total reflection will be destroyed when generating surface plasma body resonant vibration, causes reflected light energy sharply to decline, in reflectance spectrum
On there is formant.SPR is very sensitive to the variation of the environment at conducting medium and insulator dielectric interface, in this way,
The minor change of refractive index, specificity analysis biomolecule, chemicals can be detected using the movement of spectral resonance position
Matter ingredient etc..
When the single metal layer without any modification is covered on sensor core heart district as sensing element, sensor does not have
Selectivity, is only used for the measurement of some simple systems (such as aqueous solution of ethyl alcohol, glucose, sucrose)；When detecting substance, this
Kind transducer sensitivity and precision are lower.
Utility model content
In order to solve the deficiencies in the prior art, the purpose of the utility model is to provide a kind of three-decker D-type optical fiber SPR biographies
Sensor improves sensor accuracy and sensitivity.
To achieve the goals above, the technical solution of the utility model are as follows:
A kind of three-decker D-type optical fiber spr sensor, including D-type optical fiber, the D-type optical fiber are the light containing D type section
Fibre, Duan Weiyi sections of radial sections of the D type are the fiber segment of D type, and the fibre core of D type section is exposed in the plane of D type section, D type section
Plane be successively arranged the first gold nano grain layer, curing tungsten layer and the second gold nano grain layer from the bottom to top.
Gold nano grain laminar sensor, which is arranged, in the utility model has good sensitivity characteristic, in the D type section of D-type optical fiber
Plane be successively arranged the first gold nano grain layer, curing tungsten layer and the second gold nano grain layer from the bottom to top so that two sulphur
Change tungsten layer and forms nanometric spacer, tungsten disulfide (WS in gold nano grain layer2) double as typical semiconductor-transition metal
Alkyl halide has Van der Waals that layer structure, and each layer is all as made of S-W-S sandwich arrangement.Tungsten disulfide also has
Special property, such as indirectly-direct band gap transition, Gu Jihua, high carrier mobility, tunable exciton effect etc..Firstly,
With WS2Layer is used as nano-space, forms vertical plasmon nanostructure, probe molecule is by combining the structure to provide
Fine and close three-dimensional hot spot and show the excellent sensitivity of sensor.Secondly, WS2Layer can also the biggish AuNPs of compact package, reduce
Mass loss of the hydridization plasmon nanostructure to Electromagnetic enhancement, while can be enhanced with induced chemical, further promote SPR
Behavior.Third, with WS2Layer is used as nano-space, is generated by the nano gap between plane nano structure highly reinforcing
SPR also can be enhanced in localized electromagnetic field, improves sensor accuracy and sensitivity.
The utility model has the following beneficial effects:
The utility model is sequentially prepared the first gold nano grain layer, WS in D-type optical fiber section2Layer, the second gold nano grain
Layer, forms a kind of SPR sensorgram structure.It may resonate when there are the intrinsic wave in metallic gold encounters light evanescent wave, from
And generate SPR phenomenon.Gold nano grain layer has good sensitivity characteristic, and WS2As between accurate nanometer in this structure
Parting can obtain highly reinforcing electromagnetic field, the enhanced sensitivity layer as gold nano grain layer.The utility model proposes SPR biography
Feel structure compared to common spr sensor have higher sensing sensitivity, better hybrid plasma nanostructure, together
Shi Caiyong prepares WS between two layers of gold nano grain layer2As sensitization structure.Pass through the optical resonance signal to dielectric surface
The advantages that detection, this sensor have real-time monitoring, high sensitivity, and performance is stablized, compact-sized, in physics, chemistry, life
The fields such as object, medical treatment, food industry have broad application prospects.
Detailed description of the invention
The Figure of description for constituting a part of the utility model is used to provide a further understanding of the present invention, this
The illustrative embodiments and their description of utility model do not constitute the improper limit to the utility model for explaining the utility model
It is fixed.
Fig. 1 is the structural schematic diagram of the sensor of the utility model embodiment 1；
Fig. 2 is the sensor D type segment structure schematic diagram of the utility model embodiment 1；
Fig. 3 is the sensor D type section radial section structural schematic diagram of the utility model embodiment 1；
Wherein, 1, D-type optical fiber, 2, fibre core, the 3, first gold nano grain layer, 4, curing tungsten layer, the 5, second gold nano
Granulosa.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the utility model.It removes
Non- otherwise indicated, all technical and scientific terms used herein has the ordinary skill with the utility model technical field
The normally understood identical meanings of personnel.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the utility model.As used herein, unless the context clearly indicates otherwise, otherwise singular
Form be also intended to include plural form, additionally, it should be understood that, when in the present specification use term "comprising" and/or
When " comprising ", existing characteristics, step, operation, device, component and/or their combination are indicated.
As background technique is introduced, transducer sensitivity and the lower deficiency of precision exists in the prior art, to understand
Technical problem certainly as above, the utility model proposes a kind of three-decker D-type optical fiber spr sensors.
A kind of exemplary embodiment of the utility model provides a kind of three-decker D-type optical fiber spr sensor, including D
Type optical fiber, the D-type optical fiber are the optical fiber containing D type section, and Duan Weiyi sections of radial sections of the D type are the fiber segment of D type, D type
The fibre core of section is exposed in the plane of D type section, and the plane of D type section is successively arranged the first gold nano grain layer, two sulphur from the bottom to top
Change tungsten layer and the second gold nano grain layer.
Gold nano grain laminar sensor, which is arranged, in the utility model has good sensitivity characteristic, in the D type section of D-type optical fiber
Plane be successively arranged the first gold nano grain layer, curing tungsten layer and the second gold nano grain layer from the bottom to top so that two sulphur
Change tungsten layer and forms nanometric spacer, tungsten disulfide (WS in gold nano grain layer2) double as typical semiconductor-transition metal
Alkyl halide has Van der Waals that layer structure, and each layer is all as made of S-W-S sandwich arrangement.Tungsten disulfide also has
Special property, such as indirectly-direct band gap transition, Gu Jihua, high carrier mobility, tunable exciton effect etc..Firstly,
With WS2Layer is used as nano-space, forms vertical plasmon nanostructure, probe molecule is by combining the structure to provide
Fine and close three-dimensional hot spot and show the excellent sensitivity of sensor.Secondly, WS2Layer can also the biggish AuNPs of compact package, reduce
Mass loss of the hydridization plasmon nanostructure to Electromagnetic enhancement, while can be enhanced with induced chemical, further promote SPR
Behavior.Third, with WS2Layer is used as nano-space, is generated by the nano gap between plane nano structure highly reinforcing
SPR also can be enhanced in localized electromagnetic field, improves sensor accuracy and sensitivity.
In one or more embodiments of the embodiment, D-type optical fiber uses multimode fibre.
The D-type optical fiber is then existed the preparation method comprises the following steps: one section of coat of multimode or large core fiber side is removed
A slot is opened up in a part of covering, makes the radial section D type of remaining optical fiber, this slot is finally polished and determined by groove depth
Surface is smooth.The method for opening up a slot is the method, such as Side polishing fiber method etc. of conventional grinding optical fiber.
In one or more embodiments of the embodiment, the length of D type section is 1~3cm.
In one or more embodiments of the embodiment, D type section is located at the middle part of D-type optical fiber.
In one or more embodiments of the embodiment, the radius phase of the radial section height and D-type optical fiber of D type section
Deng.Radial section height refers to the vertical range of D type section planar central Yu D type section arcwall face.
In one or more embodiments of the embodiment, the radial section of D type section fibre core is D type, and D type section fibre core is put down
Face and the plane of D type section are generally aligned in the same plane.
In one or more embodiments of the embodiment, the plane smoothness of D type section is 0.9~1.1A.
In one or more embodiments of the embodiment, the first gold nano grain layer with a thickness of 40~60nm.Preparation
The method of first gold nano grain layer are as follows: by magnetic control sputtering system with 5~15 seconds sputtering times in the plane of D-type optical fiber
Au film is sputtered, the Ar by being introduced into 50sccm carries out the first annealing process in horizontal quartz tube, and quartz ampoule is with 10 DEG C/min's
When rate is heated to 800 DEG C and is kept for 60 minutes, Au film is transformed into the first gold nano grain layer.Under first gold nano grain layer
The plane contact on surface and D-type optical fiber.
In one or more embodiments of the embodiment, curing tungsten layer with a thickness of 1~2nm.Prepare tungsten disulfide
The step of layer are as follows: ethylene glycol solution is added to high-purity (NH4)2WS4(the NH of 1.25wt% is formed in powder4)2WS4It is molten
Liquid.Ultrasonic treatment is after 30 minutes, by (NH4)2WS4Solution is coated in the upper surface of the first gold nano grain layer, obtains uniform and thin
(NH4)2WS4Film.Curing tungsten layer is prepared in the upper surface of the first gold nano grain layer by thermal decomposition process, wherein gas
Body flows (Ar/H at 800 DEG C2=80sccm/20sccm) reactions in 60 minutes.
In one or more embodiments of the embodiment, the second gold nano grain layer with a thickness of 40~60nm.Preparation
The step of second gold nano grain layer are as follows: by magnetic control sputtering system with 5~15 seconds sputtering times in the upper of curing tungsten layer
Surface sputters Au film, and the Ar by being introduced into 50sccm carries out the first annealing process in horizontal quartz tube, quartz ampoule with 10 DEG C/
When the rate of min is heated to 500 DEG C and is kept for 30 minutes, Au film is transformed into the second gold nano grain layer.
In order to enable those skilled in the art can clearly understand the technical solution of the utility model, it below will knot
It closes specific embodiment and the technical solution of the utility model is described in detail.
Embodiment 1
A kind of three-decker D-type optical fiber spr sensor, as shown in Figures 1 to 3, including D-type optical fiber 1, D-type optical fiber are to contain D
The optical fiber of type section, Duan Weiyi sections of radial sections of D type are the fiber segment of D type, and the fibre core 2 of D type section is exposed in the plane of D type section, D
The plane of type section is successively arranged the first gold nano grain layer 3, curing tungsten layer 4 and the second gold nano grain layer 5 from the bottom to top.
The length of D type section is 2cm.D type section is located at the middle part of D-type optical fiber 1.The radial section height and D-type optical fiber of D type section
1 radius is equal.The plane of the fibre core 2 of D type section and the plane of D type section are generally aligned in the same plane.First gold nano grain layer 3, two
The thickness for vulcanizing tungsten layer 4 and the second gold nano grain layer 5 is respectively 50nm, 2nm, 50nm.
Sensor the preparation method comprises the following steps: common multimode fibre middle section is ground since side, grinding length is 2 centimetres, D
Type groove depth is equal with the radius length of optical fiber, keeps grinding trench bottom flat and smooth, smoothness is maintained at 1A.Pass through magnetron sputtering
System sputters Au film with 10 seconds sputtering times in the plane of D-type optical fiber, by introducing the Ar of 50sccm in horizontal quartz tube
The first annealing process of middle progress, when quartz ampoule is heated to 800 DEG C and is kept for 60 minutes with the rate of 10 DEG C/min, Au film is transformed into
First gold nano grain layer.Au was sputtered in the plane of D-type optical fiber with 5~15 seconds sputtering times by magnetic control sputtering system
Film, the Ar by being introduced into 50sccm carry out the first annealing process in horizontal quartz tube, and quartz ampoule is added with the rate of 10 DEG C/min
For heat to 800 DEG C and when being kept for 60 minutes, Au film is transformed into the first gold nano grain layer.The lower surface of first gold nano grain layer with
The plane contact of D-type optical fiber.Au was sputtered in the upper surface of curing tungsten layer with 10 seconds sputtering times by magnetic control sputtering system
Film, the Ar by being introduced into 50sccm carry out the first annealing process in horizontal quartz tube, and quartz ampoule is added with the rate of 10 DEG C/min
For heat to 500 DEG C and when being kept for 30 minutes, Au film is transformed into the second gold nano grain layer.
The D-type optical fiber spr sensor being prepared can be directly accessed the sensor-based system using multimode fibre as optical path, and put
It sets in biological chemical environment to be sensed, input terminal is the wideband light source of visible light wave range using spectrum, and output end uses light
Spectrometer PG 2000 analyzes light passing rate.
In practical sensing process, wide spectrum optical injects in the sensor of sensing unit, according to the difference of extraneous biochemical substances,
First gold nano grain layer/WS2Layer/the second gold nano grain layer surface generates different SPR effects, is presented as in wide spectrum optical
Different frequency resonance peaks, and this effect can be observed directly in real time, to realize optical signal to biochemical substances such as DNA
Sensing, the sensitivity of this sensing is molecular level.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of three-decker D-type optical fiber spr sensor, characterized in that including D-type optical fiber, the D-type optical fiber is to contain D type
The optical fiber of section, Duan Weiyi sections of radial sections of the D type are the fiber segment of D type, and the fibre core of D type section is exposed in the plane of D type section,
The plane of D type section is successively arranged the first gold nano grain layer, curing tungsten layer and the second gold nano grain layer from the bottom to top.
2. sensor as described in claim 1, characterized in that D-type optical fiber uses multimode fibre.
3. sensor as described in claim 1, characterized in that the length of D type section is 1~3cm.
4. sensor as described in claim 1, characterized in that D type section is located at the middle part of D-type optical fiber.
5. sensor as described in claim 1, characterized in that the radius phase of the radial section height of D type section and D-type optical fiber
Deng.
6. sensor as described in claim 1, characterized in that the radial section of D type section fibre core is D type, and D type section fibre core is put down
Face and the plane of D type section are generally aligned in the same plane.
7. sensor as described in claim 1, characterized in that the plane smoothness of D type section is 0.9~1.1A.
8. sensor as described in claim 1, characterized in that the first gold nano grain layer with a thickness of 40~60nm.
9. sensor as described in claim 1, characterized in that curing tungsten layer with a thickness of 1~2nm.
10. sensor as described in claim 1, characterized in that the second gold nano grain layer with a thickness of 40~60nm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964676A (en) * | 2020-12-22 | 2021-06-15 | 燕山大学 | Surface plasmon resonance sensor chip and preparation method and application thereof |
| CN114441481A (en) * | 2022-01-28 | 2022-05-06 | 天津大学 | Near-guided wave optical fiber SPR probe, preparation method and sensing system |
-
2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964676A (en) * | 2020-12-22 | 2021-06-15 | 燕山大学 | Surface plasmon resonance sensor chip and preparation method and application thereof |
| CN114441481A (en) * | 2022-01-28 | 2022-05-06 | 天津大学 | Near-guided wave optical fiber SPR probe, preparation method and sensing system |
| CN114441481B (en) * | 2022-01-28 | 2022-09-16 | 天津大学 | Near-guided wave optical fiber SPR probe, preparation method and sensing system |
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