CN104819936A - Spectroelectro-chemistry sensing composite probe for measuring colloidal quantum dot thin film - Google Patents
Spectroelectro-chemistry sensing composite probe for measuring colloidal quantum dot thin film Download PDFInfo
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Abstract
The invention discloses a spectroelectro-chemistry sensing composite probe for measuring a colloidal quantum dot thin film. The spectroelectro-chemistry sensing composite probe is characterized in that a macro-quantity solution testing cavity and a thin-layered cavity are formed in a quartz luminosity pool; an interface is formed in the bottom of the thin-layered cavity; a capillary tube can be inserted in the interface; a circular cover plate is arranged on the upper end surface of the quartz luminosity pool; three electrode slots are formed in the circular cover plate; an upper light path channel and a lower light path channel are formed in the outside of the quartz luminosity pool; by the upper light path channel, the macro-quantity solution testing cavity can receive light; by the lower light path channel, the thin-layered cavity can receive light; a fiber interface (a) and a fiber interface (b) are formed in the outside of the quartz luminosity pool; and a light shielding cover is arranged on the outside of the quartz luminosity pool. By the spectroelectro-chemistry sensing composite probe, various testing requirements can be met, and standard testing data can be obtained. The spectroelectro-chemistry sensing composite probe has the advantages that the quartz luminosity pool is multipurpose, the cost is saved, electrodes are changed conveniently, the light transmitting pool is convenient to clean, and the detection precision is high.
Description
Technical field
A kind of spectroelectrochemistry sensing composite probe measuring colloidal attitude quantum dot film that the present invention relates to, can be used for Optical Electro-Chemistry field tests.
Background technology
Semiconductor-quantum-point has quantum size effect, Dielectric confinement effect, multiple carrier generation and detachable feature, therefore, quantum dot sensitized solar cell (QDSSC) theoretical efficiency using quantum dot as sensitizer can reach 66%[AndersHagfeldt, Gerrit Boschloo, Licheng Sun, Lars Kloo, Henrik Pettersson.Dye-Sensitized SolarCells.Chem.Rev., 2010,110,6595-6663], this feature makes quantum dot solar cell have important researching value and application potential.Being with shape size adjustable also for QDSSC brings the space of more Material selec-tion and new construction exploitation of quantum dot, QDSSC, by selecting the different quantum dot that can be with and the size controlling particle diameter to realize the controllable adjustment of extinction wavelength, improves the concentration of exciton simultaneously.In the research of QDSSC, electrolyte redox electricity is cause battery open circuit voltage and overall efficiency main cause on the low side to not mating between current potential with oxidation state dye molecule energy level.Therefore, absolute level of energy [Zhong, the H. of Accurate Determining quantum point under simulated battery environment; Lo, S.S.; Mirkovic, T.; Li, Y.; Ding, Y.; Li, Y.; Scholes, G.D.ACS Nano2010,4,5253.doi:10.1021/nn1015538], choosing can be significant for improving photoelectric cell conversion efficiency with the quanta point material of cell electrolyte level-density parameter.
The sensitive surface of the device of current test colloidal attitude quantum dot film spectrum is mostly arc surface, but the convex surface of circular arc is unfavorable for the transmission of light, sensing modes is limited, sensitivity not high (can only measure and be greater than nA level photocurrent), and the light path of light source is difficult to determine.In PhotoelectrochemicalMethod Method, because photo-signal is produced by interfacial reaction, therefore the real table area of electrode and photo-signal closely light mutually, and the light-receiving area of conventional colloidal attitude quantum dot film is difficult to control, cause the controllability of test and experimental repeatability poor.Hole, top, test spectral electrochemical quartzy luminosity pond top board mostly is square, although can electrode position be fixedly secured, but the angle of working electrode sensitive surface [burnt Kui, Lv Gang, Sun Wei can not be regulated, Tao Yang, Wu Junfeng, UV/Vis Thin Layer Spectroelectrochemistry. Qingtao Chemical Engineering College's journal, 2001,22 (3), 0201-0209].In addition, the thin layer cavity of the bottom in quartzy luminosity pond, cavity is narrow and small, is difficult to cleaning.
Summary of the invention
The present invention is the weak point for avoiding existing for above-mentioned prior art, a kind of spectroelectrochemistry sensing composite probe measuring colloidal attitude quantum dot film is provided, gather while being intended to make it can realize colloidal attitude quantum dot film spectroscopic data and electrochemical data, simultaneously highly sensitive, controllability good and reproducible.
Technical solution problem of the present invention, adopts following technical scheme:
The present invention measures the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film, its feature is: arrange a quartzy luminosity pond, magnanimity solution testing cavity and the thin layer cavity be communicated with below described magnanimity solution testing cavity is provided with in quartzy luminosity pond, the bottom of described thin layer cavity, be positioned at described quartzy luminosity pond sidewall on be provided with capillary interface, hairiness tubule is inserted in described capillary interface, described kapillary one end is communicated with thin layer cavity, and the other end stretches out outside quartzy luminosity pond;
One is provided with for fixing the circular lid plate hole of circular cover in the upper surface in described quartzy luminosity pond; Described circular cover is provided with three be respectively used to insert working electrode, electrode jack to electrode and contrast electrode;
Be outside equipped with in described quartzy luminosity pond for making magnanimity solution testing cavity receive the upper path channels of light and the lower path channels for making thin layer cavity receive light, the direction of described lower path channels is positioned at the thickness direction of described thin layer cavity; The rubber cushion socket for inserting teflon rubber cushion is provided with on described in path channels, along the tangent plane direction of path channels on described, described teflon rubber cushion is provided with the light hole of multiple different pore size, and described light hole is for controlling the light-receiving area of described magnanimity solution testing cavity;
Outside described quartzy luminosity pond, with described on path channels be cross direction on be provided with the optical fiber interface a of the light signal for receiving magnanimity solution testing cavity; Be outside equipped with the axis of described lower path channels at collinear optical fiber interface b in described quartzy luminosity pond, described lower path channels and described optical fiber interface b are positioned at the both sides of described thin layer cavity, and described optical fiber interface b is for receiving the light signal of thin layer cavity;
Shading case is outside equipped with in described quartzy luminosity pond.
The present invention measures the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film, and its feature is also: described shading case is a monoblock type teflon case; Described upper path channels and described lower path channels are all the cavity be located on teflon case; Described optical fiber interface a and described optical fiber interface b is all the hole extending to described teflon case outer wall from quartzy luminosity pond outer wall; To the through slot be arranged with for holding kapillary on described teflon case.
Described capillary interface totally two, is symmetricly set on the both sides of thin layer cavity respectively, and axis is perpendicular to the thickness direction of described thin layer cavity.
Combined probe of the present invention not only may be used for the spectroelectrochemistry sensing testing of colloidal attitude quantum dot film, can also be used for realizing In situ spectroscopic electro-chemical test to photoelectric activity material (as semiconductor material), the collection of ultravioletvisible absorption signal, glimmering (phosphorus) light signal, solution system electroluminescence and photogenerated current signal.
The diameter of lower path channels is 0.5cm, and upper path channels diameter is 1.0cm, and length is all 1cm, and namely control light source is 1.0cm to the light path of magnanimity solution testing cavity and thin layer cavity.Lower path channels and upper path channels, respectively just to the thin layer cavity and magnanimity solution testing cavity with quartzy luminosity pond, can ensure the accuracy of light path, light intensity, obtain high mensuration reappearance.
Teflon rubber cushion is provided with the light hole (being respectively the light hole of 0.50cm, 0.40cm, 0.30cm, 0.20cm, 0.10cm and 0.060cm containing diameter) of multiple different pore size, accurately can controls the light-receiving area of magnanimity solution testing cavity;
Size 1.0cm × 1.0cm × the 2.0cm of magnanimity solution testing cavity, size 1.0cm × 0.1cm × 0.5cm thin layer cavity of thin layer cavity only can store microelectrolysis liquid, and this electrolytic solution can be consumed fast by electrode reaction, forms the Depletion electrolysis of material.
Be connected with the below of thin layer cavity and be provided with capillary interface, in capillary interface, insert kapillary; This kapillary not only can realize the input and output of micro solution, realizes material and detects in the online biography of thin layer cavity, also can meet the cleaning of thin layer cavity, has the solution of special requirement can realize input inert gas (N for oxygen level in solution simultaneously
2, He) function of bubbling deoxygenation.
The top in quartz luminosity pond adopts circular port design, circular cover is installed, rotation can be carried out according to the testing requirement of working electrode (as ITO electrode, various precious metal network gate electrode) sensitive surface light angle to regulate, working electrode can only be regulated more convenient, easy to operate than square hole top board, test data is more accurate.
Device of the present invention gathers while can realizing colloidal attitude quantum dot film spectroscopic data and electrochemical data, can by comprise ultraviolet visible absorption spectra, fluorescence spectrum, electroluminescence spectrum, photocurrent response spectrum, decay spectra and quantum dot electron level absolute position mensuration based on one, form a kind of multifunctional spectrum electrochemical copolymerization sensing probe, easy to operate, controllability is good, and measurement sensitivity is high.
Device of the present invention by installing light source in upper path channels porch, collection (electroluminescence as quantum dot) while spectroscopic data (as the ultra-violet absorption spectrum of routine, fluorescence spectrum and phosphorescence spectrum) and electrochemical data can being carried out to magnanimity solution testing cavity; By installing light source in lower path channels porch, can carry out Depletion electrolysis to the solution in thin layer cavity, gather (as ultraviolet-galvanochemistry spectrogram) while realizing spectroscopic data and electrochemical data, a pond is multiplex, saves cost.
Accompanying drawing explanation
Fig. 1 is the front elevation that the present invention measures the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film;
Fig. 2 is the side view that the present invention measures the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film;
Fig. 3 is the vertical view that the present invention measures the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film;
Fig. 4 is the schematic diagram that the present invention measures circular cover in the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film;
Fig. 5 is the schematic diagram that the present invention measures teflon rubber cushion in the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film;
Fig. 6 for utilize the present invention to pop one's head in measured in embodiment 1 differential responses temperature, the differential responses time Hot-bubbling method synthesis CdS quantum dot ultra-violet absorption spectrum;
Fig. 7 to pop one's head in the fluorescence spectrum of measured CdS quantum dot for utilizing the present invention in embodiment 2;
Fig. 8 to pop one's head in measured Cd for utilizing the present invention in embodiment 3
6p
7the fluorescence spectrum of quantum dot film and electroluminescence spectrum;
Fig. 9 (a) to pop one's head in measured Cd for utilizing the present invention in embodiment 4
6p
7(1.0mgmL
-1) cyclic voltammogram that can be with of quantum dot, Fig. 9 (b) serves as reasons the Cd that (a) figure calculates
6p
7quantum dot energy band diagram, conduction band and forbidden band represent with (■), () respectively;
The ZnO@Zn that Figure 10 is the fluorescence emission peak 635nm that utilizes the present invention to pop one's head in measured in embodiment 5
3p
2the photocurrent response of NCs-ITO.
Number in the figure: path channels, 10 rubber cushion sockets, 11 teflon cases, 12 quartzy luminosity ponds, 13 circular cover, 13a electrode jack, 14 teflon rubber cushions, 14a light hole in 1 circular lid plate hole, 2 magnanimity solution testing cavitys, 3 optical fiber interface a, 4 optical fiber interface b, 5 kapillaries, 6 through slots, 7 thin layer cavitys, 8 times path channels, 9.
Embodiment
As shown in Fig. 1,2 and 3, the structure that the present invention measures the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film is: arrange a quartzy luminosity pond 12, magnanimity solution testing cavity 2 and the thin layer cavity 7 be communicated with below magnanimity solution testing cavity 2 is provided with in quartzy luminosity pond 12, the bottom of thin layer cavity 7, be positioned at quartzy luminosity pond sidewall on be provided with capillary interface, hairiness tubule 5 is inserted in capillary interface, kapillary 5 one end is communicated with thin layer cavity 7, and the other end stretches out outside quartzy luminosity pond; Capillary interface totally two, be symmetricly set on the both sides of thin layer cavity 7 respectively, and axis is perpendicular to the thickness direction of thin layer cavity 7.
One is provided with for fixing the circular lid plate hole 1 of circular cover 13 in the upper surface in quartzy luminosity pond; As shown in Figure 4, circular cover 13 is provided with three to be respectively used to insert working electrode, electrode jack 13a to electrode and contrast electrode;
Be outside equipped with in quartzy luminosity pond for making magnanimity solution testing cavity 2 receive the upper path channels 9 of light and the lower path channels 8 for making thin layer cavity 7 receive light, lower path channels 8 is positioned at the thickness direction of described thin layer cavity 7; In upper path channels 9, on edge, the tangent plane direction of path channels 9 is provided with the rubber cushion socket 10 for inserting teflon rubber cushion 14, as shown in Figure 5, teflon rubber cushion 14 is provided with the light hole 14a of multiple different pore size, and light hole 14a is for controlling the light-receiving area of magnanimity solution testing cavity 2;
Outside quartzy luminosity pond, with the direction of upper path channels 9 in cross on be provided with the optical fiber interface a3 of the light signal for receiving magnanimity solution testing cavity 2; Be outside equipped with in quartzy luminosity pond with the axis of lower path channels 8 at collinear optical fiber interface b4, lower path channels 8 and described optical fiber interface b4 are positioned at the both sides of described thin layer cavity 7, and optical fiber interface b4 is for receiving the light signal of thin layer cavity 7;
Shading case is outside equipped with in described quartzy luminosity pond.Concrete, shading case is a monoblock type teflon case 11; Upper path channels 9 and lower path channels 8 are all the cavity be located on teflon case; Optical fiber interface a3 and optical fiber interface b4 is all the hole extending to teflon case 11 outer wall from quartzy luminosity pond outer wall; To the through slot 6 be arranged with for holding kapillary 5 on teflon case 11.
The application mode of combined probe of the present invention is stated below by specific embodiment:
Embodiment 1 QDs absorption spectrum signal measuring
The present embodiment measures UV adsorption spectrum (Abs spectrum) of gas-hydrothermal solution Reactive Synthesis CdS quantum dot as follows, and wherein the synthetic method of CdS quantum dot is see Yang, T.; Lu, M.; Mao, X.; Liu, W.; Wan, L.; Miao, S.; Xu, J., Synthesis of CdS quantum dots (QDs) via a hot-bubbling route and co-sensitized solar cellsassembly.Chem.Eng.J.2013,225, (0), 776-783.
Pour the liquid to be measured containing CdS quantum dot into quartzy luminosity pond 12 in the present embodiment, make the full thin layer cavity 7 of immersion to be measured, cover teflon case 11; Light source (deuterium lamp or tungsten lamp) is fixed on lower path channels 8, optical fiber interface b4 connecting fiber output spectrum signal, measure the ultra-violet absorption spectrum of quantum dot, result as shown in Figure 6, absorption spectrum (the temperature 40 DEG C of as can be seen from the figure gas-hydrothermal solution Reactive Synthesis CdS quantum dot, reaction time 0.5h), there is a sharp-pointed absorption peak at 313nm; Increase with the reaction time, the absorption ripple bag that 370nm occurs, this is large-size quantum dots typical peaks.Along with the reaction time extends to 1h further, all there is absorption peak at 323nm and 350nm place in collection of illustrative plates, presents the generation of the CdS cluster of other types.When 80 DEG C of reaction 1.0h, absorb absorption peak collection of illustrative plates just not occurring CdS magic cluster, and be elevated to the process of 260 DEG C in temperature from 80 DEG C, the position of absorption peak is also from 350nm red shift to about 450nm.The absorption spectra data of the present invention's measured son point is consistent with by ultraviolet spectrophotometer measured result.
Embodiment 2 QDs fluorescence spectrum signal measuring
The present embodiment measures the fluorescence spectrum (PL) of gas-hydrothermal solution Reactive Synthesis CdS quantum dot as follows:
Respectively by temperature of reaction 40 DEG C and reaction time 0.5h, temperature of reaction 180 DEG C and reaction time 0.5h and temperature of reaction 260 DEG C and the CdS quantum dot test fluid that reaction time 0.5h obtains pours quartzy luminosity pond into, test fluid is made to be full of magnanimity solution testing cavity 2, cover teflon case 11, diode light-source is adopted to be fixed on upper path channels 9 as the exciting light of fluorescence spectrum (PL), Fiber connection is exported fluorescence spectrum signal to the optical fiber interface a 3 of side, measure the fluorescence spectrum of quantum dot, result as shown in Figure 7, as can be seen from the figure the present embodiment tests the rising with temperature of the corresponding fluorescence emission peak that obtains also from 417nm red shift to the position of about 450nm, show that the size of particle is large in change.The data obtained and use data consistent that fluorospectrophotometer is surveyed, illustrate that the fluorescence spectrum of the measured son point of the present embodiment has high accuracy.
Embodiment 3 QDs electroluminescence signal measures
The present embodiment measures Cd as follows
6p
7the electroluminescence spectrum (EL) of Colloidal Quantum Dots, test its fluorescence spectrum (PL) by the mode that embodiment 2 is identical simultaneously:
By electrolytic solution, (4-(dimercapto methylene)-2-methyl-6-(to dimethylaminostyryl)-4H-pyrans (containing supporting electrolyte tetrabutylammonium perchlorate (0.1M)) pours quartzy luminosity pond into, electrolytic solution is made to be full of magnanimity solution testing cavity 2, Cd
6p
7colloidal Quantum Dots on clean ito glass, prepare quantum dot film by spin processes and on quantum dot film by mask plate thermal evaporation one deck aluminium (about 400nm) as working electrode ([Miao, S.; Yang, T.; Hickey, S.G.; Lesnyak, V.; Rellinghaus, B.; Xu, J.; Eychmueller, A., Emissive ZnO@Zn3P2 Nanocrystals:Synthesis, Optical, and Optoelectrochemical Properties.Small 2013,9, (20), 3415-3422.]), be inserted in the electrode jack 13a of circular cover 13, contrast electrode and be inserted in two other electrode jack 13a of circular cover 13 respectively to electrode, will three electrode circular cover 13 cover buckle be plugged in the circular lid plate hole of upper end, quartzy luminosity pond, three Electrode connection electrochemical workstations, give Cd by electrochemical workstation
6p
7quantum dot film one 5.0V voltage, by Fiber connection to optical fiber interface a 3, gathers spectral signal and by Optical Fiber Transmission to spectrometer, tests Cd
6p
7the electroluminescence spectrum (EL) of Colloidal Quantum Dots.As shown in Figure 8, known Cd
6p
7eL and PL of film composes existing highest peak and has identical peak position, shows that this probe measures EL and has very high accuracy.Repeatedly measure, its EL reappearance also has good result.
Embodiment 4 QDs level of energy measures
The present embodiment measures Cd as follows
6p
7the level of energy of Colloidal Quantum Dots:
By electrolytic solution (1.0mgmL
-1cd
6p
7quantum dot, 4-(dimercapto methylene)-2-methyl-6-(to dimethylaminostyryl)-4H-pyrans is containing supporting electrolyte tetrabutylammonium perchlorate (0.1M)) pour quartzy luminosity pond into, electrolytic solution is made to be full of magnanimity solution testing cavity 2, working electrode is glass-carbon electrode, contrast electrode is standard hydrogen electrode, be platinum filament to electrode, above-mentioned three electrodes are inserted into the electrode jack 13a of circular cover 13, this being fixed three electrode circular cover is inserted in the circular lid plate hole 1 of quartzy luminosity Chi Chi upper end, three Electrode connection electrochemical workstations are used for transmission of electric signals, diode light-source is fixed on upper path channels 9, Fiber connection to optical fiber interface a 3 for gathering fluorescence signal, and by this Signal transmissions to spectrometer, measure Cd
6p
7(1.0mgmL
-1) energy band diagram of quantum dot solution system.Fig. 9 (a) is Cd
6p
7the cyclic voltammogram at the different fluorescence excitation peak of quantum dot, as seen from the figure along with the increase of quantum dot fluorescence excitation peak, oxidation peak and the reduction peak peak position of quantum dot there occurs skew.Fig. 9 (b) is the relation of the quantum dot energy band diagram that obtains and quantum dot size of being converted as calculated by (a) figure.As seen from the figure, along with the reduction of particle size, the energy of valence-band level reduces gradually and the energy of conduction level increases.This result is basically identical with the quantum confinement energy level utilizing effective mass model to calculate.Therefore, probe of the present invention can measure the relation of quantum dot level of energy and quantum size.
The collection of embodiment 5 QDs photogenerated current signal
The present embodiment measures ZnO@Zn as follows
3p
2nanocrystalline photogenerated current signal:
Pour electrolytic solution (acetonitrile and 0.1mol/L tetrabutylammonium perchlorate) into quartzy luminosity pond, make electrolytic solution be full of magnanimity solution testing cavity (2), the ZnO@Zn of deposited monolayers on clean ITO
3p
2nanocrystalline as working electrode [Miao, S., Yang, T., Hickey, S.G., Lesnyak, V., Rellinghaus, B., Xu, J., Eychmueller, A., EmissiveZnO@Zn
3p
2nanocrystals:Synthesis, Optical, and Optoelectrochemical Properties.Small 2013, 9, (20), 3415-3422.], Pt silk is inserted into the electrode jack 13a of circular cover 13 as auxiliary electrode (to electrode) and pseudo-contrast electrode, this being fixed three electrode circular cover is inserted in the circular lid plate hole 1 of upper end, quartzy luminosity pond, three Electrode connection electrochemical workstations are used for transmission of electric signals, LED source is fixed on upper path channels 9, Fiber connection to optical fiber interface a 3 for gathering fluorescence signal, and by this Signal transmissions to spectrometer.Light emitting diode sends light pulse signal and is irradiated to the about 5min of ITO working electrode, changes open and close button after current potential is stable every 30s, record transient photocurrents.The data obtained is as Figure 10.Can be seen by figure: when light "ON", photo-current intensity strengthens rapidly, and the state that reaches capacity rapidly, when light "Off", photocurrent gets back to rapidly original level again.This process can repeatedly, and even working electrode is immersed a few hours in electrolytic solution, photocurrent also significant change does not occur, and ZnO@Zn is described
3p
2nCs can stable existence in the electrolytic solution.Therefore, probe of the present invention can be used for the collection of QDs photogenerated current signal.
Claims (3)
1. one kind measures the spectroelectrochemistry sensing composite probe of colloidal attitude quantum dot film, it is characterized in that: a quartzy luminosity pond (12) is set, magnanimity solution testing cavity (2) and the thin layer cavity (7) be communicated with in described magnanimity solution testing cavity (2) below is provided with in described quartzy luminosity pond (12), in the bottom of described thin layer cavity (7), the sidewall being positioned at described quartzy luminosity pond is provided with capillary interface, hairiness tubule (5) is inserted in described capillary interface, described kapillary (5) one end is communicated with thin layer cavity (7), the other end stretches out outside quartzy luminosity pond,
One is provided with for fixing the circular lid plate hole (1) of circular cover (13) in the upper surface in described quartzy luminosity pond; Described circular cover (13) is provided with three be respectively used to insert working electrode, electrode jack (13a) to electrode and contrast electrode;
Be outside equipped with in described quartzy luminosity pond for making magnanimity solution testing cavity (2) receive the upper path channels (9) of light and the lower path channels (8) for making thin layer cavity (7) receive light, described lower path channels (8) is positioned at the thickness direction of described thin layer cavity (7); On described path channels (9) upper, to be provided with rubber cushion socket (10) for inserting teflon rubber cushion (14) along the tangent plane direction of described upper path channels (9), described teflon rubber cushion (14) is provided with the light hole (14a) of multiple different pore size, and described light hole (14a) is for controlling the light-receiving area of described magnanimity solution testing cavity (2);
Outside described quartzy luminosity pond, with described on the direction of path channels (9) in cross is provided with the optical fiber interface a (3) of the light signal for receiving magnanimity solution testing cavity (2); Be outside equipped with the axis of described lower path channels (8) collinear optical fiber interface b (4) in described quartzy luminosity pond, described lower path channels (8) and described optical fiber interface b (4) are positioned at the both sides of described thin layer cavity (7), and described optical fiber interface b (4) is for receiving the light signal of thin layer cavity (7);
Shading case is outside equipped with in described quartzy luminosity pond.
2. the spectroelectrochemistry sensing composite probe of mensuration colloidal attitude quantum dot film according to claim 1, is characterized in that: described shading case is a monoblock type teflon case (11); Described upper path channels (9) and described lower path channels (8) are all the cavity be located on teflon case; Described optical fiber interface a (3) and described optical fiber interface b (4) are all the holes extending to described teflon case (11) outer wall from quartzy luminosity pond outer wall; To the through slot be arranged with for holding kapillary (5) (6) on described teflon case (11).
3. the spectroelectrochemistry sensing composite probe of mensuration colloidal attitude quantum dot film according to claim 1 and 2, it is characterized in that: described capillary interface totally two, be symmetricly set on the both sides of thin layer cavity (7) respectively, and axis is perpendicular to the thickness direction of described thin layer cavity (7).
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