CN208795654U - A sensor for measuring refractive index - Google Patents
A sensor for measuring refractive index Download PDFInfo
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- CN208795654U CN208795654U CN201821462341.0U CN201821462341U CN208795654U CN 208795654 U CN208795654 U CN 208795654U CN 201821462341 U CN201821462341 U CN 201821462341U CN 208795654 U CN208795654 U CN 208795654U
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- gold
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- refractive index
- sensor
- nanoblock
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- 239000010931 gold Substances 0.000 claims abstract description 59
- 229910052737 gold Inorganic materials 0.000 claims abstract description 59
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229920000867 polyelectrolyte Polymers 0.000 claims abstract description 15
- 239000010409 thin film Substances 0.000 claims abstract description 15
- 239000010408 film Substances 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000001338 self-assembly Methods 0.000 claims description 4
- 230000005686 electrostatic field Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims 1
- 230000008021 deposition Effects 0.000 claims 1
- 230000008020 evaporation Effects 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000002086 nanomaterial Substances 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000000985 reflectance spectrum Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002082 metal nanoparticle Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 210000002381 plasma Anatomy 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000000609 electron-beam lithography Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
本实用新型公开了一种用于测试折射率的传感器，涉及微纳尺度的传感器件，属光信息领域；该传感器包括金纳米块阵列模组、用于封装所述金纳米块阵列模组的壳体及500~1500 nm波段高透的薄膜，所述金纳米块阵列模组封装于所述壳体中，所述薄膜覆盖在壳体表面用于密封，其特征在于所述的金纳米块阵列模组依次由衬底层、金薄膜层、聚电解质层、金纳米块阵列层复合组成；本方案制备的折射率传感器利用该结构激发等离子激元共振，利用峰位随背景折射率变化而出现明显移动实现了对环境折射率的传感探测，金材质的稳定性保证了该传感器的性能稳定。
The utility model discloses a sensor for testing the refractive index, which relates to a micro-nano-scale sensing device and belongs to the field of optical information; the sensor comprises a gold nano-block array module, and a sensor for encapsulating the gold nano-block array module A shell and a film with high transparency in the 500-1500 nm band, the gold nanoblock array module is encapsulated in the shell, and the film is covered on the surface of the shell for sealing, characterized in that the gold nanoblocks The array module is sequentially composed of a substrate layer, a gold thin film layer, a polyelectrolyte layer, and a gold nanoblock array layer. The refractive index sensor prepared in this scheme uses this structure to excite plasmon resonance, and uses the peak position to appear with the change of the background refractive index. The obvious movement realizes the sensing detection of the refractive index of the environment, and the stability of the gold material ensures the stable performance of the sensor.
Description
Technical field
The utility model relates to a kind of senser elements, are related to the test index sensor of micro/nano-scale, belong to optical information neck
Domain.
Background technique
In recent years, metal micro-nanostructure and its optical property cause academic and industrial circle very big concern, sensing,
The fields such as photodetection, photovoltaic energy conversion and catalysis show good application prospect.Wherein, metal micro-nanostructure array table
Reveal modulated optical property, the modulated light reflection of shape, size and period etc. by changing metal micro-nanostructure or
The feature peak position of absorption spectra, and then can be used for the detection of sensing or specific wavelength.Maiken H. Mikkelsen etc. is in gold thin film
The silver nanoparticle block of colloid is arranged in substrate, and the polymer of introducing nanometer scale is isolated between silver nanoparticle block and gold thin film substrate
Layer has observed that adjustable narrowband perfection absorbs (Gleb M. Akselrod, Jiani in visible light near infrared band
Huang, Thang B. Hoang, Patrick T. Bowen, Logan Su, David R. Smith, and Maiken
H. Mikkelsen, Large-Area Metasurface Perfect Absorbers from Visible to Near-
Infrared, Advanced Materials, 2015,27,8028-8034).Wu Shaolong etc. utilizes the polyphenyl second of self assembly
Alkene micron ball array is that template prepares gold nano hole array film, it is coupled with the gold thin film of ultra-thin medium layer covering, can
To obtain the ultralow reflection peak that bandwidth is only 4 nm, and the peak position occurs apparent motion (China with the variation of background refractive index
Number of patent application: 201711291796.0).
Realize that the device of refractive index sensing is directed to currently based on the plasma resonance phenomenon of metal micro-nanostructure excitation
Specific morphology metal.The structure or use " method from top to bottom " carry out micro-nano carving to metallic film or block in order to obtain
It carves or the metal micro-nano particle of the characteristic pattern of " method from bottom to top " method synthesis is specifically arranged.Former approach
It needs use cost expensive and processes inefficient micro-nano technology equipment (such as focused ion beam system of processing, electron beam lithography system
System), it is difficult to realize the preparation of the metal micro-nanostructure array of large area.Later approach generally first passes through solwution method synthesis metal
Nano particle then arranges to synthesized metal nanoparticle and obtains array structure.Currently, later approach can be with
Silver nanoparticle block array is made, but silver nano-grain is all very poor in the stability of solution and air, the index sensor constructed
Test result it is unstable.
Utility model content
The utility model is technology of the sensor in the stability of solution and air difference for solving refractive index in the prior art
Problem, the technical solution adopted is as follows:
It is a kind of for testing the sensor of refractive index, including gold nano block array mould group, for encapsulating the gold nano block
The shell of array mould group and the high saturating film of 500 ~ 1500 nm wave bands, the gold nano block array module packaging is in the shell
In, the film is covered on surface of shell for sealing, and the gold nano block array mould group is successively by substrate layer, gold thin film
Layer, polyelectrolyte layer, the compound composition of gold nano block array layer；Wherein gold thin film layer is attached on substrate layer by vapor deposition,
Polyelectrolyte layer is attached to gold thin film surface by LBL self assembly, and gold nano block array layer is adsorbed in institute by electrostatic field gravitation
State polyelectrolyte layer surface.Gold nano block array layer, which is distributed in the gold thin film for loaded polyelectrolyte layer, in this programme is equivalent to
The miniature optical resonant cavity of substantial amounts is constructed, also by gold nano block when these miniature optical resonant cavity Induced Plasmas resonate
Background refractive index influence, the refractive index of background solution is extrapolated so as to the valley according to reflectance spectrum.Thus can be used for
The refractive index of testing background solution.
More optimal solution are as follows: the gold nano block geometrical morphology in the gold nano block array layer is cubic block, with poly- electricity
Solution matter layer is face contact.Since gold nano block and polyelectrolyte layer are face contact, single gold nano block and polyelectrolyte are increased
The contact area of layer, size, the Plasmon Resonance for realizing gold thin film layer and gold nano block array layer optical resonator are special
Sign peak position is obvious, and solution to be measured will not change the self character of sensor, the technical effect of reliable test result.
Detailed description of the invention
Fig. 1: gold nano block array modular structure schematic diagram；
Fig. 2: corresponding reflectance spectrum under different background refractive index；
Fig. 3: side length is the scanning electron microscope (SEM) photograph of 85 nm gold nano blocks；
Fig. 4: duty ratio is the scanning electron microscope (SEM) photograph of 12% gold nano block array；
Fig. 5: the corresponding relationship of paddy position and background refractive index is reflected in embodiment one；
Wherein: 1- substrate layer, 2- gold thin film layer, 3- polyelectrolyte layer, 4- gold nano block, 5- gold nano block array layer.
Specific embodiment
In order to illustrate more clearly of utility model, it is further described with reference to the accompanying drawings and embodiments:
Embodiment one:
It is a kind of for testing the sensor of refractive index, including gold nano block array mould group, for encapsulating the gold nano block
The shell of array mould group and the high saturating film of 500 ~ 1500 nm wave bands, the gold nano block array module packaging is in the shell
In, the film is covered on surface of shell for sealing, and the gold nano block array mould group is successively by substrate as shown in Figure 1:
Layer 1, gold thin film layer 2, polyelectrolyte layer 3, the compound composition of gold nano block array layer 5；Wherein gold thin film layer is attached by vapor deposition
In on substrate layer, polyelectrolyte layer is attached to gold thin film surface by LBL self assembly, and gold nano block array layer passes through electrostatic
Field gravitation is adsorbed in the polyelectrolyte layer surface.
More optimal solution are as follows: 54 geometrical morphology of gold nano block is cubic block in the gold nano block array layer, and poly-
Electrolyte layer is face contact.
Side length is the scanning electron microscope (SEM) photograph pattern of 85 nm gold nano block array layers as shown in figure 3, duty ratio is 12% gold nano
The scanning electron microscope (SEM) photograph of block array layer is as shown in Figure 4.
In the slot of index sensor inject various concentration glucose solution (such as 0%, 10%, 20%, 30% and 40%, it is right
The refractive index answered is respectively 1.3330,1.3385,1.3495,1.3587 and 1.3665).Using the spectral measurement system that diffuses,
Different reflectance spectrums can be obtained.These spectrum have an apparent reflection paddy, and the position of paddy is with background refractive index
Variation has apparent movement, as shown in Figure 2 (arrow indicates that the refractive index of background solution increases in figure).It will reflection paddy position and back
The corresponding relationship of scape refractive index is fitted, and can obtain the sensitivity of the sensor, as shown in figure 5, sensitivity is 542 nm/
RIU。
The utility model proposes excite Plasmon Resonance, benefit using the structure for testing the sensor of refractive index
Occurring with background variations in refractive index apparent motion with peak position realizes sensor measuring to ambient refractive index, the stabilization of golden material
Property ensure that the sensor performance stablize.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821462341.0U CN208795654U (en) | 2018-09-07 | 2018-09-07 | A sensor for measuring refractive index |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821462341.0U CN208795654U (en) | 2018-09-07 | 2018-09-07 | A sensor for measuring refractive index |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208795654U true CN208795654U (en) | 2019-04-26 |
Family
ID=66208727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821462341.0U Active CN208795654U (en) | 2018-09-07 | 2018-09-07 | A sensor for measuring refractive index |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208795654U (en) |
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2018
- 2018-09-07 CN CN201821462341.0U patent/CN208795654U/en active Active
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