CN208795654U - It is a kind of for testing the sensor of refractive index - Google Patents
It is a kind of for testing the sensor of 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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Abstract
The utility model discloses a kind of for testing the sensor of refractive index, is related to the senser element of micro/nano-scale, belongs to optical information field；The sensor includes gold nano block array mould group, the shell for encapsulating the gold nano block 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, the film is covered on surface of shell for sealing, it is characterised in that the gold nano block array mould group successively by substrate layer, gold thin film layer, polyelectrolyte layer, gold nano block array layer is compound forms；The index sensor of this programme preparation excites Plasmon Resonance using the structure, and occurring with background variations in refractive index apparent motion using peak position realizes sensor measuring to ambient refractive index, and the stability of golden material ensure that the performance of the sensor is stablized.
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)
1. a kind of for testing the sensor of refractive index, including gold nano block array mould group, for encapsulating the gold nano block battle array
The shell of column mould group and the high saturating film of 500~1500nm wave band, the gold nano block array module packaging in the shell,
The film is covered on surface of shell for sealing, it is characterised in that the gold nano block array mould group 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 to substrate by vapor deposition
On layer, polyelectrolyte layer is attached to gold thin film surface by LBL self assembly, and gold nano block array layer is inhaled by electrostatic field gravitation
Invest the polyelectrolyte layer surface.
2. according to claim 1 for testing the sensor of refractive index, it is characterised in that: the gold nano block array layer
In gold nano block geometrical morphology be cubic block, with polyelectrolyte layer be face contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821462341.0U CN208795654U (en) | 2018-09-07 | 2018-09-07 | It is a kind of for testing the sensor of refractive index |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821462341.0U CN208795654U (en) | 2018-09-07 | 2018-09-07 | It is a kind of for testing the sensor of refractive index |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208795654U true CN208795654U (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821462341.0U Active CN208795654U (en) | 2018-09-07 | 2018-09-07 | It is a kind of for testing the sensor of refractive index |
Country Status (1)
| Country | Link |
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2018
- 2018-09-07 CN CN201821462341.0U patent/CN208795654U/en active Active
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