CN112485545A - Electric field detection device based on dimer surface plasmon resonance regulation and control - Google Patents
Electric field detection device based on dimer surface plasmon resonance regulation and control Download PDFInfo
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- CN112485545A CN112485545A CN202011267332.8A CN202011267332A CN112485545A CN 112485545 A CN112485545 A CN 112485545A CN 202011267332 A CN202011267332 A CN 202011267332A CN 112485545 A CN112485545 A CN 112485545A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R29/12—Measuring electrostatic fields or voltage-potential
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Abstract
The invention provides an electric field detection device based on dimer surface plasmon resonance regulation and control, which comprises a substrate layer, a heating layer and a precious metal dimer layer, wherein the heating layer is arranged on the substrate layer, the precious metal dimer layer is arranged on the heating layer, the precious metal dimer layer comprises precious metal dimer units which are periodically arranged, each precious metal dimer unit comprises a first precious metal part, a second precious metal part and an organic conjugated polymer material, a gap is arranged between each first precious metal part and each second precious metal part, the organic conjugated polymer material fills the gap, and the first precious metal parts, the second precious metal parts and the organic conjugated polymer material are in contact with the heating layer. The invention has the advantage of high electric field detection sensitivity.
Description
Technical Field
The invention relates to the field of electric field detection, in particular to an electric field detection device based on dimer surface plasmon resonance regulation.
Background
The measurement of the electric field has great significance for military industry such as missile, rocket, aircraft launching and the like, and also has wide application in places such as urban environmental pollution, ultra-clean laboratories, oil refineries, oil storage stations and the like which are easy to cause static electricity and are easy to be damaged by static electricity and radars. The traditional electric field measuring device has low sensitivity, and the exploration of an electric field detection technology based on a new principle has important significance for improving the sensitivity of electric field measurement.
Disclosure of Invention
In order to solve the above problems, the present invention provides an electric field detection device based on dimer surface plasmon resonance regulation, which includes a substrate layer, a heating layer, and a noble metal dimer layer, wherein the heating layer is disposed on the substrate layer, the noble metal dimer layer is disposed on the heating layer, the noble metal dimer layer includes noble metal dimer units arranged periodically, the noble metal dimer unit includes a first noble metal portion, a second noble metal portion, and an organic conjugated polymer material, a gap is disposed between the first noble metal portion and the second noble metal portion, the gap is filled with the organic conjugated polymer material, and the first noble metal portion, the second noble metal portion, and the organic conjugated polymer material are in contact with the heating layer.
Further, the organic conjugated polymer material is poly-3-hexylthiophene.
Further, the top of the gap is narrow and the bottom of the gap is wide.
Still further, noble metal particles are included, and the noble metal particles are disposed on the heating layer in the gap.
Further, the number of the noble metal particles is plural.
Still further, the noble metal particles have a diameter of less than 100 nanometers.
Further, the material of the noble metal particles is gold or silver.
Further, the material of the first noble metal part and the second noble metal part is gold or silver.
Further, the period is a square period.
Further, the width of the top of the gap is less than 40 nanometers.
The invention has the beneficial effects that: the invention provides an electric field detection device based on dimer surface plasmon resonance regulation and control, which comprises a substrate layer, a heating layer and a precious metal dimer layer, wherein the heating layer is arranged on the substrate layer, the precious metal dimer layer is arranged on the heating layer, the precious metal dimer layer comprises precious metal dimer units which are periodically arranged, each precious metal dimer unit comprises a first precious metal part, a second precious metal part and an organic conjugated polymer material, a gap is arranged between each first precious metal part and each second precious metal part, the organic conjugated polymer material fills the gap, and the first precious metal parts, the second precious metal parts and the organic conjugated polymer material are in contact with the heating layer. When the method is applied, firstly, the local surface plasmon resonance wavelength of the noble metal dimer layer is measured in a space without an electric field, and the heating part is at normal temperature; then, the method is placed in an electric field environment to be measured, meanwhile, the heating layer is used for heating the organic conjugated polymer material, after the heating is continued for a period of time, the organic conjugated polymer material is cooled, the local surface plasmon resonance wavelength of the noble metal dimer layer is measured again, and the electric field to be measured is determined according to the movement of the local surface plasmon resonance wavelengths of the front noble metal dimer layer and the rear noble metal dimer layer. In the heating process, the direction of the organic conjugated polymer molecular chain is changed by the electric field to be measured, so that the dielectric environment between the first noble metal part and the second noble metal part in the noble metal dimer layer is changed, and the resonance wavelength of the noble metal dimer layer is changed. When heating, the molecular chain direction of the organic conjugated polymer material depends heavily on the electric field at the position of the organic conjugated polymer material, and the local surface plasmon resonance characteristic of the noble metal structure depends heavily on the surrounding environment, so the invention has the advantage of high electric field detection sensitivity.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an electric field detection device based on dimer surface plasmon resonance regulation.
FIG. 2 is a schematic diagram of another electric field detection device based on dimer surface plasmon resonance regulation.
FIG. 3 is a schematic diagram of another electric field detection device based on dimer surface plasmon resonance regulation.
In the figure: 1. a base layer; 2. a heating layer; 3. a noble metal dimer unit; 4. a first noble metal section; 5. a second noble metal section; 6. an organic conjugated polymer material; 7. noble metal particles.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1
The invention provides an electric field detection device based on dimer surface plasmon resonance regulation, which comprises a substrate layer 1, a heating layer 2 and a noble metal dimer layer as shown in figure 1. Heating layer 2 is disposed on substrate layer 1. The material of the substrate layer 1 is a heat insulating material for insulating heat generated by the heating layer 2. The heating layer 2 may generate a high temperature by a method of connecting other high temperature objects, and may also generate a high temperature by generating heat through a resistor, which is not particularly limited herein. The noble metal dimer layer is disposed on the heating layer 2, and the noble metal dimer layer includes noble metal dimer units 3 arranged periodically. Specifically, the noble metal dimer unit 3 is arranged with a square period. The noble metal dimer unit 3 includes a first noble metal portion 4, a second noble metal portion 5, and an organic conjugated polymer material 6, and a gap is provided between the first noble metal portion 4 and the second noble metal portion 5, and the organic conjugated polymer material 6 fills the gap. The first noble metal part 4 and the second noble metal part 5 are rectangular solids, which facilitates the preparation. The material of the first noble metal part 4 and the second noble metal part 5 is gold or silver. The first noble metal part 4, the second noble metal part 5, the organic conjugated polymer material 6 are in contact with the heating layer 2. The organic conjugated polymer material 6 is poly-3-hexylthiophene. When the electric field is heated, the micro appearance of the poly-3-hexylthiophene is easier to be regulated and controlled by the electric field to be measured.
In the application, first, the local surface plasmon resonance wavelength of the noble metal dimer layer is measured in the electric field-free space, and the heating part is at room temperature. Specifically, a continuous spectrum laser is used for irradiating the noble metal dimer layer, the scattering spectrum of the noble metal dimer layer is detected, and the local surface plasmon resonance wavelength of the noble metal dimer unit 3 is determined through the scattering spectrum; then, the method is placed in an electric field environment to be measured, the heating layer 2 is applied to heat the organic conjugated polymer material 6 at the same time, after the heating lasts for a period of time, the organic conjugated polymer material 6 is cooled, the local surface plasmon resonance wavelength of the precious metal dimer layer is measured again, and the electric field to be measured is determined according to the movement of the local surface plasmon resonance wavelengths of the front and back precious metal dimer layers. The heating is carried out at a temperature greater than 130 degrees celsius for a time greater than 30 minutes to facilitate sufficient modification of the microstructure of the organic conjugated polymeric material 6. In the heating process, the to-be-detected electric field changes the direction of the molecular chain of the organic conjugated polymer material 6, so that the dielectric environment between the first noble metal part 4 and the second noble metal part 5 in the noble metal dimer layer is changed, and the resonance wavelength of the noble metal dimer layer is changed. When heating, the molecular chain direction of the organic conjugated polymer material 6 depends heavily on the electric field at the position, and the local surface plasmon resonance characteristic of the noble metal structure depends heavily on the surrounding environment, so the invention has the advantage of high electric field detection sensitivity.
In the present invention, incident light excites two types of surface plasmon resonances: one is surface plasmon resonance between the tops of first noble metal section 4 and second noble metal section 5, at which time, at the tops of first noble metal section 4 and second noble metal section 5, electric charges resonate mainly in the horizontal direction in fig. 1; the second is surface plasmon resonance inside the gap, that is, at the side surfaces of first noble metal section 4 and second noble metal section 5, with the charge mainly in the vertical direction in fig. 1. That is, in both cases, the vibration direction of the electric charge differs. When the direction of the molecular chain of the organic conjugated polymer material 6 is changed, the two resonant wavelengths are affected differently, so that the resonant wavelengths with different rules move, namely, the difference between the two resonant wavelengths is changed more, the electric field to be detected is determined by measuring the difference between the two resonant wavelengths before and after, and the electric field detection with higher sensitivity is realized.
In addition, in the present invention, on the one hand, the local surface plasmon resonance characteristics of the first noble metal section 4 and the second noble metal section 5 are heavily dependent on their surroundings; on the other hand, the first noble metal part 4 and the second noble metal part 5 are good conductors of heat, and can transfer heat to the organic conjugated polymer material 6 well, thereby changing the direction of molecular chains in the organic conjugated polymer material 6 more. Both effects are beneficial to changing the local surface plasmon resonance characteristics of the noble metal dimer unit 3 more, thereby realizing electric field detection with higher sensitivity.
Example 2
On the basis of example 1, as shown in fig. 2, the top of the gap is narrow and the bottom of the gap is wide. The width of the top of the gap is less than 40 nanometers. As a result, on the one hand, the coupling between the first noble metal section 4 and the second noble metal section 5 is stronger on top of the first noble metal section 4 and the second noble metal section 5; on the other hand, the electromagnetic waves entering the gap are more easily confined within the gap. Therefore, the arrangement of the embodiment reduces the half-peak width of the two resonance modes, not only reduces the detection difficulty, but also improves the detection sensitivity.
Example 3
On the basis of embodiment 2, as shown in fig. 3, noble metal particles 7 are further included, and the noble metal particles 7 are disposed on the heating layer 2 in the gap. The number of the noble metal particles 7 is plural. The noble metal particles 7 have a diameter of less than 100 nm. The material of the noble metal particles 7 is gold or silver. Thus, the electromagnetic wave entering the gap can be absorbed by the noble metal particles 7, so that the electromagnetic wave is more easily confined in the gap, the half-peak width of the resonance mode is reduced, and the sensitivity of electric field detection is improved. In addition, the noble metal particles 7 have more contact area with the organic conjugated polymer material 6. When the molecular chain direction of the organic conjugated polymer material 6 is changed, namely the effective refractive index of the organic conjugated polymer material 6 is changed, the effective refractive index of the composite structure of the noble metal particles 7 and the organic conjugated polymer material 6 is changed more, so that the resonance wavelength of the plasmon resonance on the inner surface of the gap is moved more, and the electric field detection with higher sensitivity is realized.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. The utility model provides an electric field detection device based on dimer surface plasmon resonance regulation and control, its characterized in that includes stratum basale, zone of heating, noble metal dimer layer, the zone of heating is arranged in on the stratum basale, noble metal dimer layer is arranged in on the zone of heating, noble metal dimer layer includes periodic arrangement's noble metal dimer unit, noble metal dimer unit includes first noble metal portion, second noble metal portion, organic conjugated polymer material, first noble metal portion with be equipped with the clearance between the second noble metal portion, organic conjugated polymer material fills the clearance, first noble metal portion the second noble metal portion organic conjugated polymer material with the zone of heating contacts.
2. The electric field detection device based on dimer surface plasmon resonance regulation of claim 1, wherein: the organic conjugated polymer material is poly-3-hexylthiophene.
3. The electric field detection device based on dimer surface plasmon resonance regulation of claim 2, wherein: the top of the gap is narrow and the bottom of the gap is wide.
4. The electric field detection device based on dimer surface plasmon resonance regulation of claim 3, wherein: still include noble metal granule, noble metal granule sets up in the clearance on the zone of heating.
5. The electric field detection device based on dimer surface plasmon resonance regulation of claim 4, wherein: the number of the noble metal particles is plural.
6. The electric field detection device based on dimer surface plasmon resonance regulation of claim 5, wherein: the noble metal particles have a diameter of less than 100 nanometers.
7. The electric field detection device based on dimer surface plasmon resonance regulation of claim 6, wherein: the material of the noble metal particles is gold or silver.
8. The electric field detection device based on dimer surface plasmon resonance modulation of any of claims 1-7, wherein: the material of the first noble metal part and the second noble metal part is gold or silver.
9. The electric field detection device based on dimer surface plasmon resonance regulation of claim 8, wherein: the period is a square period.
10. The electric field detection device based on dimer surface plasmon resonance modulation of any of claims 1-9, wherein: the width of the top of the gap is less than 40 nanometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011267332.8A CN112485545A (en) | 2020-11-13 | 2020-11-13 | Electric field detection device based on dimer surface plasmon resonance regulation and control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011267332.8A CN112485545A (en) | 2020-11-13 | 2020-11-13 | Electric field detection device based on dimer surface plasmon resonance regulation and control |
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| CN112485545A true CN112485545A (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011267332.8A Withdrawn CN112485545A (en) | 2020-11-13 | 2020-11-13 | Electric field detection device based on dimer surface plasmon resonance regulation and control |
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- 2020-11-13 CN CN202011267332.8A patent/CN112485545A/en not_active Withdrawn
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