CN206208754U - A kind of biology sensor based on Graphene - Google Patents
A kind of biology sensor based on Graphene Download PDFInfo
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- CN206208754U CN206208754U CN201621311658.5U CN201621311658U CN206208754U CN 206208754 U CN206208754 U CN 206208754U CN 201621311658 U CN201621311658 U CN 201621311658U CN 206208754 U CN206208754 U CN 206208754U
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- laser
- graphene
- planoconvex spotlight
- mode fiber
- fixing device
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Abstract
The utility model discloses a kind of biology sensor based on Graphene, by fixing device, laser, the first planoconvex spotlight, polariscope, the second planoconvex spotlight, single-mode fiber, spectrometer, Graphene composition.The laser that laser sends forms directional light and launches through the first planoconvex spotlight, the S-polarization light in laser is filtered out when again by polariscope, remaining p-type polarised light is converged by the second planoconvex spotlight and entered in single-mode fiber, when at the groove that P polarization light travels to single-mode fiber region to be measured, P polarization light excites the Graphene of sections bottom to be measured so as to produce surface plasma wave, if there is living matter or chemical substance in region to be measured, then surface plasma wave produces the change of refractive index with determinand interphase interaction, it is the change of detectable spectrum using spectrometer, so as to detection and the monitoring to living matter and chemical substance can be realized, the invention sensitivity is high, high precision, have a good application prospect.
Description
Technical field
Technical field the invention belongs to detect biological substance, and in particular to one kind is based on graphene biosensor.
Background technology
The presence of biological substance can cause that some precision instruments break down, and cause serious accident, so invention is a kind of
Can accurate detection biological substance whether there is and can be widely used in needed for the sensor of life is the epoch.
The most frequently used biology sensor is generally adopted by metallic film in optical fiber surface at present, the present invention use based on
The transducer sensitivity enhancing of Graphene, can more accurately detect the presence of biological substance.
This patent is detected based on surface plasma wave to biology, is a kind of based on optical fiber surface plasmon resonance body
Emerging sensor technology, this technology allows unmarked and real-time high-sensitivity detection.
Graphene has surface volume ratio higher, and with stronger optical characteristics, good electric conductivity and biofacies
Capacitive, so being adapted to do the auxiliary material of surface plasma resonance sensor.
The content of the invention
In view of the shortcomings of the prior art, excited it is an object of the invention to the P polarization light after being filtered using polariscope to be measured
The Graphene of sections bottom, so that producing surface plasma wave to be interacted with biological substance produces the change of refractive index, profit
The change of spectrum can be detected with spectrometer, detection and the monitoring to living matter and chemical substance are realized with this.
A kind of biology sensor based on Graphene, by fixing device (1), laser (2), the first planoconvex spotlight (3), partially
Light microscopic (4), the second planoconvex spotlight (5), single-mode fiber (6), spectrometer (7), Graphene (8) composition；It is characterized in that：Laser
(2) the interior left side of fixing device (1) is fixed on, the first planoconvex spotlight (3) is fixed on the interior left side of fixing device (1), polarisation
Mirror (4) is fixed on the interior middle part of fixing device (1), and the second planoconvex spotlight (5) is fixed on side in the interior right side of fixing device (1), Gu
Determine device (1) right side to be connected with single-mode fiber (6)；Single-mode fiber (6) other end is connected with spectrometer (7)；First planoconvex spotlight
And the focus of the second planoconvex spotlight (5) is respectively positioned on the same position of polariscope (4) (3)；Laser filters out S by polariscope (4)
Polarised light, remaining P polarization light travel to be excited during the groove of single-mode fiber (6) Graphene (8) of sections bottom to be measured from
And surface plasma wave is produced, it is that can detect using spectrometer (7) with the change that determinand interphase interaction produces refractive index
To the change of spectrum, so as to detection and the monitoring to living matter and chemical substance can be realized.
Described laser is propagated in single-mode fiber (6) in the way of reflecting.
Described polariscope (4) can remove the S type polarised lights in parallel laser, only retain p-type polarised light.
Described Graphene (8) is covered at single-mode fiber (6) groove area to be measured.
Operation principle of the invention is：The laser that laser (2) sends forms directional light and sends out through the first planoconvex spotlight (3)
Penetrate, then the S-polarization light in laser is filtered out during by polariscope (4), remaining p-type polarised light passes through the second planoconvex spotlight (5)
Converge and enter in single-mode fiber (6), when P polarization light travels to the groove region to be measured of single-mode fiber (6), P polarization light is excited to be treated
The Graphene (8) of sections bottom is surveyed so as to produce surface plasma wave, if there is living matter or chemical substance in region to be measured,
Then surface plasma wave produces the change of refractive index with determinand interphase interaction, is detectable light using spectrometer (7)
The change of spectrum, so as to detection and monitoring to living matter and chemical substance can be realized.
The beneficial effects of the invention are as follows：The present invention excites the Graphene of sections bottom to be measured using P polarization light, so as to produce
Surface plasma wave interacts with biological substance and produces the change of refractive index, is the change of detectable spectrum using spectrometer
Change, detection and the monitoring to living matter and chemical substance are realized with this, using Graphene have surface volume ratio higher and
Stronger optical characteristics this feature is combined with surface plasma wave Measurement for Biotechnique, reaches unmarked and real-time height
Sensitivity technique.
Brief description of the drawings
Fig. 1 is biosensor structure schematic diagram.
Specific embodiment
As shown in figure 1, a kind of biology sensor based on Graphene, by fixing device (1), laser (2), the first plano-convex
Lens (3), polariscope (4), the second planoconvex spotlight (5), single-mode fiber (6), spectrometer (7), Graphene (8) composition；Its feature
It is：Laser (2) is fixed on the interior left side of fixing device (1), and the first planoconvex spotlight (3) is fixed on the interior of fixing device (1)
Left side, polariscope (4) is fixed on the interior middle part of fixing device (1), and the second planoconvex spotlight (5) is fixed on fixing device (1)
Side in the interior right side, fixing device (1) right side is connected with single-mode fiber (6)；Single-mode fiber (6) other end is connected with spectrometer (7)；The
The focus of one planoconvex spotlight (3) and the second planoconvex spotlight (5) is respectively positioned on the same position of polariscope (4)；Work of the invention is former
Reason is：The laser that laser (2) sends forms directional light and launches through the first planoconvex spotlight (3), then is filtered during by polariscope (4)
Fall the S-polarization light in laser, remaining p-type polarised light is converged by the second planoconvex spotlight (5) and entered in single-mode fiber (6), works as P
Polarised light travels to the groove region to be measured of single-mode fiber (6), P polarization light excite the Graphene (8) of sections bottom to be measured so as to
Surface plasma wave is produced, if living matter or chemical substance, surface plasma wave and determinand occurs in region to be measured
Interphase interaction produces the change of refractive index, is the change of detectable spectrum using spectrometer (7), so as to can realize to life
The detection and monitoring of material and chemical substance.
Claims (2)
1. a kind of biology sensor based on Graphene, by fixing device (1), laser (2), the first planoconvex spotlight (3), polarisation
Mirror (4), the second planoconvex spotlight (5), single-mode fiber (6), spectrometer (7), Graphene (8) composition；It is characterized in that：Laser
(2) left side of fixing device (1) is fixed on, the first planoconvex spotlight (3) is fixed on the interior left side of fixing device (1), polariscope
(4) the interior middle part of fixing device (1) is fixed on, the second planoconvex spotlight (5) is fixed on side in the interior right side of fixing device (1), fixed
Device (1) right side is connected with single-mode fiber (6)；Single-mode fiber (6) other end is connected with spectrometer (7)；First planoconvex spotlight (3)
With the same position that the focus of the second planoconvex spotlight (5) is respectively positioned on polariscope (4)；Laser filters out S-polarization by polariscope (4)
Light, remaining P polarization light travels to be excited during the groove of single-mode fiber (6) Graphene (8) of sections bottom to be measured so as to produce
Raw surface plasma wave, is detectable light using spectrometer (7) with the change that determinand interphase interaction produces refractive index
The change of spectrum, so as to detection and monitoring to living matter and chemical substance can be realized.
2. a kind of biology sensor based on Graphene according to claim 1, its laser (2) sends parallel laser
Centre wavelength be 632.5nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621311658.5U CN206208754U (en) | 2016-11-29 | 2016-11-29 | A kind of biology sensor based on Graphene |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621311658.5U CN206208754U (en) | 2016-11-29 | 2016-11-29 | A kind of biology sensor based on Graphene |
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| CN206208754U true CN206208754U (en) | 2017-05-31 |
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| CN201621311658.5U Active CN206208754U (en) | 2016-11-29 | 2016-11-29 | A kind of biology sensor based on Graphene |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706563A (en) * | 2016-11-29 | 2017-05-24 | 中国计量大学 | Graphene-based biosensor |
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2016
- 2016-11-29 CN CN201621311658.5U patent/CN206208754U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706563A (en) * | 2016-11-29 | 2017-05-24 | 中国计量大学 | Graphene-based biosensor |
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