CN101913574A - Preparation method of cadmium telluride quantum dot - Google Patents
Preparation method of cadmium telluride quantum dot Download PDFInfo
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Abstract
The invention relates to a preparation method of a cadmium telluride quantum dot, which comprises the following steps: using CdCl2 as the Cd source, Te powder as the Te source and water as the solvent to respectively prepare Cd and Te precursor solutions; using mercaptopropionic acid as the stabilizer for quantum dot generation; and then, mixing the Cd and Te precursor solutions, and heating in water bath for reaction to obtain the CdTe quantum dot. Compared with the prior art, the invention has the following advantages: the reagents are low in price, have stable properties in air and can react without special instruments and equipment by simple operation, and the prepared CdTe quantum dot has favorable water solubility, dispersibility and stable fluorescence.
Description
Technical field
What the present invention relates to is a kind of preparation of nanomaterials, particularly a kind of preparation method of cadmium telluride quantum dot.
Background technology
Quantum dot (quantum dots QDs), claims semiconductor nano again, its radius less than or near the exciton Bohr radius, mainly by II-VI family element,, constitute as GaAs, InP as CdTe, CdSe or III-group.
Quantum dot is divided into two kinds of hydrophobicity and wetting abilities.For adapting to biomolecules, cell is organized residing wetting ability physiological environment, and the quantum dot that is used in biomedical sector nearly all is to modify through hydrophilization, and has amino, carboxyl isoreactivity group, with biomolecules couplings such as convenient and albumen, nucleic acid.The particle diameter of quantum dot is very little, and CdSe quantum dot size commonly used in the biomarker is usually at 1.8～7.0nm, and CdSe/ZnS quantum dot size is at 2～8nm.The electronic level of quantum dot is the function of its size, and particle diameter is more little, and energy level difference is big more, and transition of electron emitted fluorescence wavelength is short more.
Quantum dot exciting light spectrum width is and continuous, and specific absorbance is big, the quantum yield height; The relative organic dye of emmission spectrum is narrow and symmetrical, does not have hangover.Based on such characteristics, can detect various biomolecules in the same system simultaneously thereby be implemented in the different quantum dot of several emission wavelengths of laser simultaneous excitation of same wavelength.
Relative organic dye, quantum dot also has good light stability, the advantage of fast light bleaching, its fluorescent lifetime is longer than the autofluorescence of tissue far away, and this provides strong instrument for detecting serum, cell, tissue or the intravital tumor markers of living animal.
The preparation of quantum dot has become research focus in recent years.Barwendi MG etc. have invented the organo-metallic method of preparation quantum dot in 1993, this method is utilized metal alkylide, nonmetal as dimethyl cadmium and alkyl, as with two-TMS selenium as presoma, trioctyl phosphine oxide TOPO is as main part, tri octyl phosphine TOP is as the double time part of solvent, high temperature at 250-300 ℃, under the anhydrous condition of anaerobic, rapidly precursor solution is injected the ligand solution nucleation and the growth of stirring fast, the quantum dot of this method preparation, it is many to have the kind that can prepare quantum dot, the method of improving the nano particle performance reaches the quantum yield advantages of higher of resulting quantum dot more, and its size distribution can be controlled with multiple means, thereby becomes the main method of present preparation quantum dot.But the organo-metallic method exists raw material shortcoming expensive and inflammable and explosive, that preparation condition is harsh, and what obtain is oil-soluble quantum dot, has therefore limited the application in biomedical sector.
After calendar year 2001, the technology of " green organic chemical method " preparation quantum dot occurred, this technology adopts inorganic cadmium, as CdO, CdCO
3As presoma, other conditions are identical with the organo-metallic method.This technology has reduced the cost of raw material and to anaerobic, anhydrous restricted condition, has reduced the pollution to environment.
Occurred sulfydryl water method afterwards, this is a kind of ionic compound that utilizes, for example CdCl
2, CdCO
3, NaHTe etc. is as presoma, with the small molecules organic compound that contains sulfydryl such as Thiovanic acid, thiohydracrylic acid, mercaptamine, halfcystine etc. and Cd
2+Form coordinate bond as stablizer, directly prepare the novel method of water-soluble quantum dot at aqueous phase.Yet because this method is at room temperature to begin reflux, the nucleation and growth of quantum dot does not have tangible temperature limit, so size heterogeneity, emission peak width are bigger.
The present invention is with reference to the reaction thinking of sulfydryl water method, adopt hydrothermal method directly in the aqueous solution, to prepare water-soluble quantum dot, present method has the nucleation and growth temperature-stable, the product uniform particle diameter, reactant is cheap and easy to get, and the advantage that method is simple is at general biology, all can carry out in the chemical laboratory, more be worthy of popularization.
Summary of the invention
The present invention is in the face of bio-medical applications, and at the problem that preparation quantum dot in organic phase exists, a kind of aqueous phase of proposition directly prepares the method for CdTe quantum dot, present method reaction conditions gentleness, raw material is cheap and easy to get, and is safe and simple, need not complex apparatus, be fit to scale operation.
A kind of preparation method of cadmium telluride quantum dot is characterized in that adopting following steps:
A) with CdCl
2Be dissolved in the deionized water, compound concentration is the CdCl of 20mmol/L
2The aqueous solution; MPA is dissolved in the deionized water, and compound concentration is the MPA aqueous solution of 20mmol/L; 0.16g tellurium powder, 0.8g sodium borohydride are added in the deionized water, and with sealing of flexible glue plug and insertion syringe needle effusion reducing gas, the room temperature lower magnetic force stirs 2h, makes oyster white NaHTe solution as the Te precursor solution behind the logical nitrogen 20min;
B) with CdCl
2The aqueous solution and the MPA aqueous solution successively add in a certain amount of deionized water, obtain the stable Cd with MPA
2+Working solution, wherein the mol ratio of Cd and MPA is 1: 0.5～1: 10, is the NaOH solution adjustment pH to 9.0-12.5 of 1mol/L with concentration, and is standby with the sealing of flexible glue plug;
C) above-mentioned NaHTe solution is added the stable Cd with MPA after with the syringe sucking-off immediately
2+In the working solution, form mixed reaction solution, be placed on heating in water bath 0.5-3h under 60-96 ℃ the environment, obtain the water-soluble CdTe quantum dots aqueous solution, then naturally cool to room temperature, the mol ratio of Cd and Te is 1: 0.08～1: 0.24 in the reaction soln;
D) get the above-mentioned CdTe quantum dot aqueous solution, add isopyknic dehydrated alcohol, leave standstill, treat that it forms flocks, after separating 10min, the 5000rpm/min whizzer discards supernatant liquor, repeat to add dehydrated alcohol and whizzer separating step 2 times again, be placed on drying in the thermo-humidistat cabinet, obtain CdTe quantum dot dry powder;
Add small amount of deionized water or damping fluid redissolution when E) using, obtain maximum emission peak and be positioned at 550nm-650nm, the half-peak width of emission peak is the cadmium telluride quantum dot aqueous solution of 5-55nm.
With prior art relatively, advantage of the present invention is: 1) raw materials used all is mineral compound except that thiohydracrylic acid, environmentally friendly, and wide material sources, cheap; 2) the reaction conditions gentleness need not high-temperature and high-pressure conditions, and preparation process is simple and safe, and at general biology, chemical laboratory can be finished; 3) quantum dot is directly in the aqueous phase nucleation, and growth has good water-solubility, can be directly used in biomedical marker field.
Description of drawings
The fluorescence situation of CdTe quantum dot under the 350nm ultra violet lamp that Fig. 1 makes for the present invention
The uv-visible absorption spectra of the CdTe quantum dot that Fig. 2 makes for the present invention
The fluorescence spectrum of the CdTe quantum dot that Fig. 3 makes for the present invention
The TEM image of the CdTe quantum dot that Fig. 4 makes for the present invention
Embodiment
Below describe each experimental procedure of the present invention in detail, steps A) in the Cd source of inorganic cadmic compound as target compound CdTe quantum dot, its kind is not specifically limited, but preferred Cd
2+Compound is such as CdO, CdCl
2, CdCO
3, CdSO
4And Cd (NO
3)
2Deng, but preferred CdCl
2
Steps A) in sulfhydryl compound as stablizer and Cd
2+Coordination reaction takes place, and its kind is not specifically limited, but the short compound of preferred carbon chain lengths, such as mercaptoethanol, thiohydracrylic acid, mercaptamine, halfcystine, 1, dimercaptosuccinic acid etc., more preferably thiohydracrylic acid, halfcystine.
Embodiment 1:
A kind of preparation method of cadmium telluride quantum dot is with 0.8gNaBH
4Add in the 50mL Erlenmeyer flask with 0.16g tellurium powder, add the 10mL deionized water, logical nitrogen 20min, jam-pack flexible glue plug inserts a syringe needle immediately, and magnetic agitation 2h obtains the NaHTe solution of oyster white prepared fresh.Get 0.5mL 200mmol/LCdCl
2Storing solution, 0.5mL the freshly prepared thiohydracrylic acid solution of 200mmol/L, the two molar ratio is 1: 1, add in another 50mL Erlenmeyer flask, add the 14mL deionized water, drip the NaOH solution of 1mol/L again, adjusting pH is 12.0, logical nitrogen 20min in the Cd precursor solution, jam-pack flexible glue plug inserts a syringe needle immediately; With the NaHTe solution 0.2mL of 1mL syringe extraction prepared fresh, add fast and be equipped with in the Erlenmeyer flask of Cd precursor liquid, at this moment the mol ratio of Cd and NaHTe is 1: 0.167, Erlenmeyer flask is put into 96 ℃ of water-baths heat 1h, takes out and naturally cools to room temperature; Open the flexible glue plug of the Erlenmeyer flask that reaction mixture is housed, discard precipitation if small amount of precipitate is arranged at the bottom, getting the supernatant liquor equal-volume adds in two 15mL centrifuge tubes, in two centrifuge tubes, add and the isopyknic dehydrated alcohol of supernatant liquor respectively again, when having treated that floss produces, with discarding supernatant liquor behind the 3000rpm/min whizzer separation 10min, repeat to add dehydrated alcohol and whizzer separating step 2 times again, after for the last time supernatant liquor being removed centrifuge tube is positioned in the thermo-humidistat cabinet and spends the night, obtain CdTe quantum dot dry powder.Add 0.5mL deionized water redissolution dry powder respectively in two centrifuge tubes, promptly obtain maximum emission peak at the CdTe of 613.5nm quantum dot, its peak width at half height is 50nm.
Embodiment 2:
A kind of preparation method of cadmium telluride quantum dot is with 0.8gNaBH
4Add in the 50mL Erlenmeyer flask with 0.16g tellurium powder, add the 10mL deionized water, logical nitrogen 20min, jam-pack flexible glue plug inserts a syringe needle immediately, and magnetic agitation 2h obtains the NaHTe solution of oyster white prepared fresh.Get the CdCl of 0.5mL 200mmol/L
2Storing solution, 1.0mL the freshly prepared thiohydracrylic acid solution of 200mmol/L, the two molar ratio is 1: 2, add in another 50mL Erlenmeyer flask, add the 14mL deionized water, drip the NaOH solution of 1mol/L again, adjusting pH is 12.0, logical nitrogen 20min in the Cd precursor solution, jam-pack flexible glue plug inserts a syringe needle immediately; With the NaHTe solution 0.2mL of 1mL syringe extraction prepared fresh, add fast and be equipped with in the Erlenmeyer flask of Cd precursor liquid, at this moment the mol ratio of Cd and NaHTe is 1: 0.167, Erlenmeyer flask is put into 96 ℃ of water-baths heat 1.5h, takes out and naturally cools to room temperature; Open the flexible glue plug of the Erlenmeyer flask that reaction mixture is housed, discard precipitation if small amount of precipitate is arranged at the bottom, getting the supernatant liquor equal-volume adds in two 15mL centrifuge tubes, in two centrifuge tubes, add and the isopyknic dehydrated alcohol of supernatant liquor respectively again, when having treated that floss produces, with discarding supernatant liquor behind the 3000rpm/min whizzer separation 10min, repeat to add dehydrated alcohol and whizzer separating step 2 times again, after for the last time supernatant liquor being removed centrifuge tube is positioned in the thermo-humidistat cabinet and spends the night, obtain CdTe quantum dot dry powder.Add 0.5mL deionized water redissolution dry powder respectively in two centrifuge tubes, promptly obtain maximum emission peak at the CdTe of 550.1nm quantum dot, its peak width at half height is 6nm.
Embodiment 3:
A kind of preparation method of cadmium telluride quantum dot is with 0.8gNaBH
4Add in the 50mL Erlenmeyer flask with 0.16g tellurium powder, add the 10mL deionized water, logical nitrogen 20min, jam-pack flexible glue plug inserts a syringe needle immediately, and magnetic agitation 2h obtains the NaHTe solution of oyster white prepared fresh.Get the CdCl of 0.5mL 200mmol/L
2Storing solution, 0.5mL the freshly prepared mercaptamine solution of 200mmol/L, the two molar ratio is 1: 1, add in another 50mL Erlenmeyer flask, add the 14mL deionized water, drip the NaOH solution of 1mol/L again, adjusting pH is 6.5, logical nitrogen 20min in the Cd precursor solution, jam-pack flexible glue plug inserts a syringe needle immediately; With the NaHTe solution 0.2mL of 1mL syringe extraction prepared fresh, add fast and be equipped with in the Erlenmeyer flask of Cd precursor liquid, at this moment the mol ratio of Cd and NaHTe is 1: 0.167, Erlenmeyer flask is put into 96 ℃ of water-baths heat 1h, takes out and naturally cools to room temperature; Open the flexible glue plug of the Erlenmeyer flask that reaction mixture is housed, discard precipitation if small amount of precipitate is arranged at the bottom, getting the supernatant liquor equal-volume adds in two 15mL centrifuge tubes, in two centrifuge tubes, add and the isopyknic dehydrated alcohol of supernatant liquor respectively again, when having treated that floss produces, with discarding supernatant liquor behind the 3000rpm/min whizzer separation 10min, repeat to add dehydrated alcohol and whizzer separating step 2 times again, after for the last time supernatant liquor being removed centrifuge tube is positioned in the thermo-humidistat cabinet and spends the night, obtain CdTe quantum dot dry powder.Add 0.5mL deionized water redissolution dry powder respectively in two centrifuge tubes, promptly obtain maximum emission peak at the CdTe of 549.5nm quantum dot, its peak width at half height is 5nm.
Embodiment 4:
A kind of preparation method of cadmium telluride quantum dot is with 0.8gNaBH
4Add in the 50mL Erlenmeyer flask with 0.16g tellurium powder, add the 10mL deionized water, logical nitrogen 20min, jam-pack flexible glue plug inserts a syringe needle immediately, and magnetic agitation 2h obtains the NaHTe solution of oyster white prepared fresh.Get the CdCl of 0.5mL 200mmol/L
2Storing solution, 0.5mL the freshly prepared thiohydracrylic acid solution of 200mmol/L, the two molar ratio is 1: 1, add in another 50mL Erlenmeyer flask, add the 14mL deionized water, drip the NaOH solution of 1mol/L again, adjusting pH is 13.0, logical nitrogen 20min in the Cd precursor solution, jam-pack flexible glue plug inserts a syringe needle immediately; With the NaHTe solution 0.1mL of 1mL syringe extraction prepared fresh, add fast and be equipped with in the Erlenmeyer flask of Cd precursor liquid, at this moment the mol ratio of Cd and NaHTe is 1: 0.083, Erlenmeyer flask is put into 96 ℃ of water-baths heat 1h, takes out and naturally cools to room temperature; Open the flexible glue plug of the Erlenmeyer flask that reaction mixture is housed, discard precipitation if small amount of precipitate is arranged at the bottom, getting the supernatant liquor equal-volume adds in two 15mL centrifuge tubes, in two centrifuge tubes, add and the isopyknic dehydrated alcohol of supernatant liquor respectively again, when having treated that floss produces, with discarding supernatant liquor behind the 3000rpm/min whizzer separation 10min, repeat to add dehydrated alcohol and whizzer separating step 2 times again, after for the last time supernatant liquor being removed centrifuge tube is positioned in the thermo-humidistat cabinet and spends the night, obtain CdTe quantum dot dry powder.Add 0.5mL deionized water redissolution dry powder respectively in two centrifuge tubes, promptly obtain maximum emission peak at the CdTe of 591.9nm quantum dot, its peak width at half height is 55nm.
Embodiment 5:
A kind of preparation method of cadmium telluride quantum dot is with 0.8gNaBH
4Add in the 50mL Erlenmeyer flask with 0.16g tellurium powder, add the 10mL deionized water, logical nitrogen 20min, jam-pack flexible glue plug inserts a syringe needle immediately, and magnetic agitation 2h obtains the NaHTe solution of oyster white prepared fresh.Get the CdCl of 0.5mL 200mmol/L
2Storing solution, 0.5mL the freshly prepared thiohydracrylic acid solution of 200mmol/L, the two molar ratio is 1: 1, add in another 50mL Erlenmeyer flask, add the 14mL deionized water, drip the NaOH solution of 1mol/L again, adjusting pH is 12.0, logical nitrogen 20min in the Cd precursor solution, jam-pack flexible glue plug inserts a syringe needle immediately; With the NaHTe solution 0.2mL of 1mL syringe extraction prepared fresh, add fast and be equipped with in the Erlenmeyer flask of Cd precursor liquid, at this moment the mol ratio of Cd and NaHTe is 1: 0.167, Erlenmeyer flask is put into 80 ℃ of water-baths heat 2h, takes out and naturally cools to room temperature; Open the flexible glue plug of the Erlenmeyer flask that reaction mixture is housed, getting the supernatant liquor equal-volume adds in two 15mL centrifuge tubes, in two centrifuge tubes, add and the isopyknic dehydrated alcohol of supernatant liquor respectively again, when having treated that floss produces, with discarding supernatant liquor behind the 3000rpm/min whizzer separation 10min, repeat to add dehydrated alcohol and whizzer separating step 2 times again, after for the last time supernatant liquor being removed centrifuge tube is positioned in the thermo-humidistat cabinet and spends the night, obtain CdTe quantum dot dry powder.Add 0.5mL deionized water redissolution dry powder respectively in two centrifuge tubes, promptly obtain maximum emission peak at the CdTe of 588.1nm quantum dot, its peak width at half height is 55nm.
Embodiment 6:
A kind of preparation method of cadmium telluride quantum dot is with 0.8gNaBH
4Add in the 50mL Erlenmeyer flask with 0.16g tellurium powder, add the 10mL deionized water, logical nitrogen 20min, jam-pack flexible glue plug inserts a syringe needle immediately, and magnetic agitation 2h obtains the NaHTe solution of oyster white prepared fresh.Get the CdCl of 0.5mL 200mmol/L
2Storing solution, 0.5mL the freshly prepared thiohydracrylic acid solution of 200mmol/L, the two molar ratio is 1: 1, add in another 50mL Erlenmeyer flask, add the 14mL deionized water, drip the NaOH solution of 1mol/L again, adjusting pH is 12.0, logical nitrogen 20min in the Cd precursor solution, jam-pack flexible glue plug inserts a syringe needle immediately; With the NaHTe solution 0.2mL of 1mL syringe extraction prepared fresh, add fast and be equipped with in the Erlenmeyer flask of Cd precursor liquid, at this moment the mol ratio of Cd and NaHTe is 1: 0.167, Erlenmeyer flask is put into 60 ℃ of water-baths heat 2h, takes out and naturally cools to room temperature; Open the flexible glue plug of the Erlenmeyer flask that reaction mixture is housed, discard precipitation if small amount of precipitate is arranged at the bottom, getting the supernatant liquor equal-volume adds in two 15mL centrifuge tubes, in two centrifuge tubes, add and the isopyknic dehydrated alcohol of supernatant liquor respectively again, when having treated that floss produces, with discarding supernatant liquor behind the 3000rpm/min whizzer separation 10min, repeat to add dehydrated alcohol and whizzer separating step 2 times again, after for the last time supernatant liquor being removed centrifuge tube is positioned in the thermo-humidistat cabinet and spends the night, obtain CdTe quantum dot dry powder.Add 0.5mL deionized water redissolution dry powder respectively in two centrifuge tubes, promptly obtain maximum emission peak at the CdTe of 523.0nm quantum dot, its peak width at half height is 25nm.
Claims (1)
1. the preparation method of a cadmium telluride quantum dot is characterized in that adopting following steps:
A) with CdCl
2Be dissolved in the deionized water, compound concentration is the CdCl of 20mmol/L
2The aqueous solution; MPA is dissolved in the deionized water, and compound concentration is the MPA aqueous solution of 20mmol/L; 0.16g tellurium powder, 0.8g sodium borohydride are added in the deionized water, and with sealing of flexible glue plug and insertion syringe needle effusion reducing gas, the room temperature lower magnetic force stirs 2h, makes oyster white NaHTe solution as the Te precursor solution behind the logical nitrogen 20min;
B) with CdCl
2The aqueous solution and the MPA aqueous solution successively add in a certain amount of deionized water, obtain the stable Cd with MPA
2+Working solution, wherein the mol ratio of Cd and MPA is 1: 0.5～1: 10, is the NaOH solution adjustment pH to 9.0-12.5 of 1mol/L with concentration, and is standby with the sealing of flexible glue plug;
C) above-mentioned NaHTe solution is added the stable Cd with MPA after with the syringe sucking-off immediately
2+In the working solution, form mixed reaction solution, be placed on heating in water bath 0.5-3h under 60-96 ℃ the environment, obtain the water-soluble CdTe quantum dots aqueous solution, then naturally cool to room temperature, the mol ratio of Cd and Te is 1: 0.08～1: 0.24 in the reaction soln;
D) get the above-mentioned CdTe quantum dot aqueous solution, add isopyknic dehydrated alcohol, leave standstill, treat that it forms flocks, after separating 10min, the 5000rpm/min whizzer discards supernatant liquor, repeat to add dehydrated alcohol and whizzer separating step 2 times again, be placed on drying in the thermo-humidistat cabinet, obtain CdTe quantum dot dry powder;
Add small amount of deionized water or damping fluid redissolution when E) using, obtain maximum emission peak and be positioned at 550nm-650nm, the half-peak width of emission peak is the cadmium telluride quantum dot aqueous solution of 5-55nm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911669A (en) * | 2011-08-01 | 2013-02-06 | 中南民族大学 | Preparation method for water-soluble chiral CdTe quantum dots |
| WO2013068601A1 (en) * | 2011-11-10 | 2013-05-16 | Universiteit Gent | Synthesis of nanomaterials |
| CN103754836A (en) * | 2014-01-20 | 2014-04-30 | 中国科学院合肥物质科学研究院 | Method for preparing tellurium colloid solution with high chemical activity and telluride nanometer material |
| CN105295922A (en) * | 2015-11-25 | 2016-02-03 | 东北师范大学 | Cadmium telluride/polyaniline nanometer composite super particles and preparation method thereof |
| CN106867540A (en) * | 2017-03-27 | 2017-06-20 | 天津工业大学 | The quick preparation of fluorescence CdTe quantum dot high |
| CN111416117A (en) * | 2020-03-11 | 2020-07-14 | 合肥国轩高科动力能源有限公司 | Preparation method of CdTe quantum dot modified lithium battery positive electrode material |
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2010
- 2010-07-08 CN CN 201010220285 patent/CN101913574A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 《高等学校化学学报》 20030228 林章碧等 用水溶液中合成的量子点作为生物荧光标记物的研究 第216-220页 1 第24卷, 第2期 2 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911669A (en) * | 2011-08-01 | 2013-02-06 | 中南民族大学 | Preparation method for water-soluble chiral CdTe quantum dots |
| WO2013068601A1 (en) * | 2011-11-10 | 2013-05-16 | Universiteit Gent | Synthesis of nanomaterials |
| US9610612B2 (en) | 2011-11-10 | 2017-04-04 | Universiteit Gent | Synthesis of nanomaterials |
| CN103754836A (en) * | 2014-01-20 | 2014-04-30 | 中国科学院合肥物质科学研究院 | Method for preparing tellurium colloid solution with high chemical activity and telluride nanometer material |
| CN103754836B (en) * | 2014-01-20 | 2016-01-06 | 中国科学院合肥物质科学研究院 | Prepare the method for high chemical reactivity tellurium colloid solution and telluride nano-material |
| CN105295922A (en) * | 2015-11-25 | 2016-02-03 | 东北师范大学 | Cadmium telluride/polyaniline nanometer composite super particles and preparation method thereof |
| CN106867540A (en) * | 2017-03-27 | 2017-06-20 | 天津工业大学 | The quick preparation of fluorescence CdTe quantum dot high |
| CN111416117A (en) * | 2020-03-11 | 2020-07-14 | 合肥国轩高科动力能源有限公司 | Preparation method of CdTe quantum dot modified lithium battery positive electrode material |
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