CN102621104A - Graphene film sensitized D-shaped optical fiber surface plasmon resonance (SPR) sensor and preparation method thereof - Google Patents
Graphene film sensitized D-shaped optical fiber surface plasmon resonance (SPR) sensor and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a graphene film sensitized D-shaped optical fiber surface plasmon resonance (SPR) sensor. The sensor comprises a D-shaped optical fiber, wherein a silver film layer is arranged on the polished surface of the D-shaped optical fiber; and a graphene film layer is arranged on the surface of the silver film layer. A preparation method comprises the following steps of: (1) preparing the D-shaped optical fiber, and preparing the silver film layer on the polished surface of the D-shaped optical fiber; and (2) preparing the graphene film layer on the surface of the silver film layer. The D-shaped optical fiber is used as a light transmission medium, an SPR structure is formed by plating a silver film on the surface of the D-shaped optical fiber, the sensitivity of the SPR sensing structure is increased by depositing or growing a graphene film material on the surface of the silver film, and the sensor has the prominent advantages of small volume, light weight, high sensitivity, quick response and the like, and has wide application prospects in the aspect of detecting trace gas, liquid, chemical elements, deoxyribonucleic acid (DNA) and the like in the fields of biology, chemistry, medicine and the like.
Description
Technical field
The present invention relates to material engineering, optical engineering and fiber optics technical field, be specifically related to D type optical fiber SPR sensor of graphene film enhanced sensitivity and preparation method thereof.
Background technology
The later stage Fibre Optical Sensor began to grow up and became an optical detective technology seventies in last century; It utilizes characteristic variations such as the intensity of light in medium, position phase, polarization; Detect variation such as a series of physical quantitys such as temperature, pressure, concentration, chemistry amount or biomass; Has highly sensitive, advantage such as response speed is fast, anti-electromagnetic interference (EMI), corrosion resistivity are strong;, have wide application potential and development prospect having obtained widespread use aspect industry, scientific research, environment, medical treatment, the military affairs etc. a lot.
The development of optical fiber sensing technology is accompanied by the development of light transmitting fiber and Fibre Optical Communication Technology, is just becoming a research focus now.Optical fiber sensing technology direction just theoretical towards the further investigation sensing, that carry out the high base components of multiparameter sensing and distributed sensing network system and research perfect in shape and function, reliability and stability develops at present.Utilize the Fibre Optical Sensor of light evanescent wave principle also to obtain extensive studies.D type fibre profile exposes owing to fibre core; Therefore the evanescent wave transmission, compact conformation and the lower advantages such as loss that have vast scale; D type optical fiber is combined with the material that some has specific function; Can constitute a series of novel optical device, be widely used in fields such as communication, luminous, sensing.Early-stage Study is found to deposit certain thickness functional form membraneous material at D type fibre profile; Utilize the interaction of film material with function and light evanescent wave to realize the sensing such as gas-liquid composition, trace element, biomedicine of high-sensitivity real-time and the distinct advantages of DNA detection, this also is one of important development direction of present optical-fiber bio field of sensing technologies.
(Surface Plasmon Resonance technology is to grow up the nineties in 20th century SPR) to surface plasma resonance technology, a kind of new technology of ligand and analyte effect on the application SPR principle detection of biological sensing chip.Plasma typically refers to the gas of being made up of the quite high free positive and negative electric charge of density, and wherein positive and negative charged ion number is almost equal, and inside does not form space charge.Metal can be regarded plasma as, because electromagnetic oscillation forms plasma wave.When light to be incident on optically thinner medium and optically denser medium when surface greater than critical angle; Can make the light evanescent wave enter into optically thinner medium; And in metal medium, have certain intrinsic plasma wave, when the intrinsic ripple of material runs into extraneous wave, just possibly resonate, thereby produce the SPR phenomenon.
The SPR metal film develops into present golden film and silverskin as two kinds of the most frequently used metal films by traditional golden film.Compare with golden film; Silverskin has higher reflectivity and higher measurement sensitivity; From three characteristic parameters (resonant wavelength, resonance width, the resonance degree of depth) of SPR spectrum, under same condition, the variation of the resonant wavelength of silverskin is obviously sensitive than golden film; The resonance degree of depth is approximately greater than golden film, and the resonance peak width is significantly less than golden film.But the chemical stability of silverskin is not as golden film, and silverskin is oxidized easily and cause the reduction of its SPR structure detection sensitivity.
Summary of the invention
The technical matters that the present invention will solve is the easily oxidized and problem that causes its SPR structure detection sensitivity to reduce of silverskin in the prior art.
Technical scheme of the present invention is: the D type optical fiber SPR sensor based on the graphene film enhanced sensitivity, comprise D type optical fiber, and have silver film at the polished surface of D type optical fiber, have the graphene film layer on the silver film surface.
Further, the thickness of said graphene film layer is 1～10 Graphene atomic layer.
Further, said silver film thickness is 10～80nm.
The invention also discloses a kind of preparation method of the D type optical fiber SPR sensor based on the graphene film enhanced sensitivity, it comprises the steps:
(1) preparation D type optical fiber; And prepare silver film at the polished surface of D type optical fiber;
(2) at silverskin surface preparation graphene film layer.
Further, the thickness of said graphene film layer is 1～10 Graphene atomic layer.
Further, the thickness of said silver film is 10～80nm.
Further, said graphene film layer is through the chemical vapour deposition technique preparation.
Further, said silver film prepares through the chemogenic deposit reducing process.
Further; The method of the said D of preparation type optical fiber is: one section coat of multimode or large core fiber side is removed; In a part of covering, dig a D type groove then, D type groove depth equates with the radius length of optical fiber, at last with this groove polishing and confirm smooth surface.
The present invention compared with prior art has following beneficial effect:
The present invention plates the silverskin of one deck 10～80nm at D type fibre profile, at the graphene film of the silverskin surface deposition or 1～10 atomic layer level thickness of growing, forms a kind of SPR sensing arrangement again.Just possibly resonate when the intrinsic ripple in having argent runs into the light evanescent wave, thereby produce the SPR phenomenon.Silverskin has good sensitivity characteristic, and graphene film has unusual intensity and fabulous light transmission, and it is as the protective seam and the enhanced sensitivity layer of silverskin in this kind structure.The SPR sensing arrangement that the present invention proposes has higher sensing sensitivity than common spr sensor; Better chemical stability, the graphene film that is employed in silverskin surface deposition or growth simultaneously is as sensitization structure, through the optical resonance input to dielectric surface; This sensor has real-time monitoring, highly sensitive; Stable performance, advantages such as compact conformation have broad application prospects in fields such as physics, chemistry, biology, medical treatment, food industry.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a longitudinal sectional view of the present invention;
Fig. 3 is for using the experimental system of sensor of the present invention.
Reference numeral is respectively among the figure: 1-D type optical fiber, 2-fibre core, 3-silver film, 4-graphene film layer, 5-sensor of the present invention, 7-wideband light source, 8-multimode optical fiber 9-EDFA, 10-spectrometer, 11-sensing environment.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
Embodiment
As depicted in figs. 1 and 2, a kind of preparation method of the D type optical fiber SPR sensor based on the graphene film enhanced sensitivity:
At first prepare D type optical fiber: common multimode optical fiber stage casing is begun to grind from the side, and grinding length is 1～3 centimetre, and D type groove depth equates with the radius length of optical fiber, makes the grinding groove bottom smooth smooth, and smoothness remains on 1A.Certainly also can be according to existing prepared by other.
Polished surface at D type optical fiber prepares silver film then; Adopt the argent rete of chemogenic deposit method of reducing about D type optical fiber cell body bottom plating one deck 50 nanometers.
On argent film surface upper strata, adopt CVD method (chemical vapour deposition technique) at last, the graphene film layer of growth 1～10 atomic layer level thickness, every layer graphene thickness is 0.30～0.40 nanometer.These 2 kinds of layer of cover material should cover fiber core.
It is the sensor-based system of light path that the D type optical fiber SPR sensor that is prepared from can directly insert with the multimode optical fiber; And be placed in the biological chemical environment of treating sensing; Input end uses the wideband light source of spectrum as visible light wave range; Output terminal adopts the broadband OSA that can detect visible light wave range, between output and OSA, builds a harmless EDFA, with amplifying optical signals.
In actual sensing process; The wide range light beam is gone in the sensor of sensing unit, according to the difference of extraneous biochemical substances, produces different SPR effects at Graphene with metal silver surface; In wide range light, be presented as different frequency resonance peaks; And this effect can be observed by real time direct in OSA, thereby has realized the sensing of light signal to biochemical substances such as DNA, and the sensitivity of this sensing is molecular level.
Above-mentioned practical implementation method is used for the apparatus of the present invention of explaining, rather than limits the invention, and in the protection domain of spirit of the present invention and claims, to any change of the present invention and change, all falls into protection scope of the present invention.
Claims (9)
1. based on the D type optical fiber SPR sensor of graphene film enhanced sensitivity, comprise D type optical fiber, have silver film, it is characterized in that: have the graphene film layer on the silver film surface at the polished surface of D type optical fiber.
2. the D type optical fiber SPR sensor based on the graphene film enhanced sensitivity according to claim 1 is characterized in that: the thickness of said graphene film layer is 1～10 Graphene atomic layer.
3. the D type optical fiber SPR sensor based on the graphene film enhanced sensitivity according to claim 2, it is characterized in that: said silver film thickness is 10～80nm.
4. preparation method based on the D type optical fiber SPR sensor of graphene film enhanced sensitivity, it is characterized in that: it comprises the steps:
(1) preparation D type optical fiber; And prepare silver film at the polished surface of D type optical fiber;
(2) at silverskin surface preparation graphene film layer.
5. a kind of D type optical fiber SPR sensor based on the graphene film enhanced sensitivity according to claim 4, it is characterized in that: the thickness of said graphene film layer is 1～10 Graphene atomic layer.
6. a kind of D type optical fiber SPR sensor based on graphene film Ceng Min according to claim 5, it is characterized in that: the thickness of said silver film is 10～80nm.
7. a kind of D type optical fiber SPR sensor based on graphene film Ceng Min according to claim 5 is characterized in that: said graphene film layer is through the chemical vapour deposition technique preparation.
8. a kind of D type optical fiber SPR sensor based on graphene film Ceng Min according to claim 6, it is characterized in that: said silver film prepares through the chemogenic deposit reducing process.
9. according to each described a kind of D type optical fiber SPR sensor of claim 4～8 based on graphene film Ceng Min; It is characterized in that: the method for the said D of preparation type optical fiber is: one section coat of multimode or large core fiber side is removed; In a part of covering, dig a D type groove then; D type groove depth equates with the radius length of optical fiber, at last with this groove polishing and confirm smooth surface.
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| CN102928388A (en) * | 2012-11-06 | 2013-02-13 | 泰州巨纳新能源有限公司 | Graphene gas sensor based on surface plasma resonance |
| CN103335741A (en) * | 2013-06-19 | 2013-10-02 | 暨南大学 | Graphene based optical fiber temperature sensor and manufacturing method thereof |
| CN103882132A (en) * | 2014-03-27 | 2014-06-25 | 中国人民解放军第三军医大学第一附属医院 | Real-time dynamic detection method of trace RNA (Ribose Nucleic Acid) |
| CN104792401A (en) * | 2015-04-14 | 2015-07-22 | 中国计量学院 | Fiber grating hydrophone for measuring near-field acoustic pressure distribution of high-frequency transducer and manufacturing method |
| CN105115943A (en) * | 2015-07-21 | 2015-12-02 | 天津大学 | Gold seed growth based preparation method of terminal reflective optical fiber surface plasmon resonance sensor |
| CN105538812A (en) * | 2015-12-11 | 2016-05-04 | 深圳大学 | High-sensitivity sensing film and surface plasmon resonance sensing detection system |
| CN105628062A (en) * | 2015-12-25 | 2016-06-01 | 中南大学 | Optical sensor based on planar waveguide resonance coupling, modulator and manufacturing method thereof |
| CN105738325A (en) * | 2016-02-29 | 2016-07-06 | 北京交通大学 | Multi-clad fiber bilateral-grinding type SPR dual-parameter sensor |
| CN106679846A (en) * | 2016-12-29 | 2017-05-17 | 中国农业大学 | Side-polished polymer temperature sensing fiber and manufacturing method thereof |
| CN107121410A (en) * | 2017-05-04 | 2017-09-01 | 南昌航空大学 | Based on D-type optical fiber SPR refractive index sensing models |
| CN107132201A (en) * | 2017-07-12 | 2017-09-05 | 广西师范大学 | The long-range pH value monitoring device of laser type |
| TWI604184B (en) * | 2016-09-09 | 2017-11-01 | 中華學校財團法人中華科技大學 | Surface plasma resonance optical fiber sensing element and its manufacturing method |
| CN108267428A (en) * | 2016-12-30 | 2018-07-10 | 北京大学深圳研究生院 | Portable reinforced surface plasma resonance biosensor |
| CN108458994A (en) * | 2018-03-27 | 2018-08-28 | 南京信息工程大学 | Double D-type optical fiber sensors based on graphene composite film and preparation method thereof |
| CN108627187A (en) * | 2018-05-07 | 2018-10-09 | 哈尔滨工程大学 | The suspending core fiber interferometric sensor of coating redox graphene |
| CN108693144A (en) * | 2018-04-28 | 2018-10-23 | 天津大学 | Durability single cell protein group Hygienic monitoring on hands of childhood method is carried out based on SPRM technologies |
| CN109085141A (en) * | 2018-08-22 | 2018-12-25 | 东北大学 | Optical fiber SPR sensor based on graphene oxide and gold nanorods enhanced sensitivity |
| CN109163745A (en) * | 2018-08-30 | 2019-01-08 | 电子科技大学 | A kind of detection method based on SPR principle sensing many reference amounts |
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| CN109655515A (en) * | 2018-11-13 | 2019-04-19 | 天津大学 | A kind of optical fiber surface plasmon resonance sensor of nano composite structure modification |
| CN110132328A (en) * | 2019-04-08 | 2019-08-16 | 东莞理工学院 | Fibre optical sensor and preparation method thereof based on thermal coupling enhancement effect |
| CN110146469A (en) * | 2019-05-14 | 2019-08-20 | 桂林电子科技大学 | A kind of gold nanotubes surface plasma fibre optical sensor of graphene coated |
| CN111189787A (en) * | 2020-01-15 | 2020-05-22 | 电子科技大学 | Hypersensitive gas sensor based on graphene D-shaped optical fiber |
| CN111999264A (en) * | 2020-07-17 | 2020-11-27 | 中国地质大学（武汉） | Biochemical sensor based on D-type photonic crystal fiber |
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Application publication date: 20120801 |