CN110655923A - Green preparation method of cadmium selenide quantum dots with specific size - Google Patents
Green preparation method of cadmium selenide quantum dots with specific size Download PDFInfo
- Publication number
- CN110655923A CN110655923A CN201911106026.3A CN201911106026A CN110655923A CN 110655923 A CN110655923 A CN 110655923A CN 201911106026 A CN201911106026 A CN 201911106026A CN 110655923 A CN110655923 A CN 110655923A
- Authority
- CN
- China
- Prior art keywords
- cadmium
- cadmium selenide
- quantum dots
- selenide quantum
- selenium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B19/00—Selenium; Tellurium; Compounds thereof
- C01B19/007—Tellurides or selenides of metals
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Optics & Photonics (AREA)
- Luminescent Compositions (AREA)
Abstract
A green preparation method of cadmium selenide quantum dots with specific sizes belongs to the technical field of quantum dot synthesis methods. According to the invention, cadmium oxide, oleic acid and liquid paraffin are stirred and heated to obtain a cadmium precursor solution, then selenium powder and liquid paraffin are stirred and heated to obtain a selenium precursor solution, and finally the selenium precursor solution and the cadmium precursor solution are mixed according to a molar ratio, separated and purified to obtain a final product. The cadmium selenide quantum dots are synthesized by an oleic acid/liquid paraffin system, the synthesis raw materials are economic and cheap, the operation is simple, the environment is protected, the repeatability is strong, and the growth process is easy to control; the introduced surfactant oleylamine can not only obtain quantum dots with larger size in a shorter time, but also effectively passivate the surface defects of the quantum dots; meanwhile, the synthesized cadmium selenide quantum dots with specific sizes have good fluorescence performance, and a certain preparation basis and basis are provided for the subsequent application of the cadmium selenide quantum dots.
Description
Technical Field
The invention belongs to the technical field of quantum dot synthesis methods, and particularly relates to a green preparation method of cadmium selenide quantum dots with specific sizes.
Background
Cadmium selenide (CdSe) quantum dots are a semiconductor nano fluorescent material, have special quantum effects compared with corresponding bulk phase materials, have the advantages of good light stability, long fluorescence service life, good biocompatibility and the like, and are popular among people in a plurality of fields such as photoelectric devices, biomedicine and the like.
The organic metal preparation method of cadmium selenide quantum dots is characterized by firstly taking dimethyl cadmium, S powder, Se powder and the like as raw materials and trioctylphosphine oxide (TOPO) and tri-n-octylphosphine (TOP) as surfactants to synthesize II-IV group semiconductor quantum dots of CdSe, CdS and the like under the conditions of oxygen-free, anhydrous and high temperature (T is 300 ℃) by Bawendi et al (J.Am.chem.Soc.1993, 115, 8706). The materials have high cost and high toxicity, the preparation process is complex, and the size of the quantum dot is not easy to control.
Peng et al improved the conventional method, proposed a new "green chemistry" synthesis method of quantum dots (J.am. chem. Soc.2001, 123, 183; Nano Lett.2001, 1, 333), selected less toxic cadmium oxide (CdO) to replace Cd (CH3)2 as cadmium precursor, selected Hexyl Phosphonic Acid (HPA) and tetradecyl phosphonic acid (TDA) as ligands, and prepared high quality CdSe quantum dots in high purity TOPO system. Although the Peng process eliminates the use of flammable and explosive alkyl metal chemicals, the reaction conditions are relatively mild, and the process cost is somewhat reduced, TOPO with high toxicity is still used as the selenium solvent.
The Chinese patent 'a synthesis method of cadmium selenide quantum dots' (publication number: CN109941977A) discloses a method for synthesizing cadmium selenide quantum dots under different conditions by controlling related experimental parameters (precursor concentration, experimental temperature), the method is low in cost and easy to implement, the synthesized cadmium selenide quantum dots are good in quality, a selenium precursor in the synthesis is made of selenium powder (Se) and tri-n-octylphosphine (TOP), the TOP with high toxicity is still used as a selenium solvent, and the reaction temperature is high.
Tang et al dissolve Se powder in liquid paraffin (J.Phys.chem.B, 2005, 109, 16671), use oleic acid as ligand, dissolve CdO in it to form Cd precursor solution, produce size homogeneous, good CdSe quantum dot of dispersion. The preparation process is low in cost, and does not need to be under the conditions of no water, no oxygen or nitrogen protection, but the regulation and control method of the quantum dot size is not described in detail.
At present, most of the preparation methods of the cadmium selenide quantum dots contain organic phosphorus, which is expensive, toxic and large in environmental pollution, needs to be prepared under a high-temperature condition and is not beneficial to controlling the growth process of the quantum dots. Since quantum dots have a quantum size effect, their photoelectric properties regularly change with size. In the prior art, the regulation and control method for the size of the quantum dot is complex, and reports on specific size are less.
Disclosure of Invention
Aiming at the defects, the invention provides a green synthesis method of the cadmium selenide quantum dots with specific sizes, which has the advantages of simple operation, low cost, environmental protection, strong repeatability and the like, and the cadmium selenide quantum dots with specific sizes also provide a certain preparation basis and basis for subsequent application.
The technical scheme adopted by the invention for solving the technical problems is as follows:
(1) placing cadmium oxide, oleic acid and liquid paraffin in a three-neck flask, wherein the molar ratio of the cadmium oxide to the oleic acid is 1:2-1:5, the volume ratio of the liquid paraffin to the oleic acid is 1:2-1:3, stirring for 30-60 minutes in a nitrogen atmosphere, stirring and heating to 150 ℃ in the nitrogen atmosphere, and generating light yellow cadmium oleate serving as a cadmium precursor solution for later use after the cadmium oxide is completely dissolved;
(2) placing selenium powder and liquid paraffin in another three-neck flask, adding the selenium powder and the liquid paraffin according to the proportion of adding 20-50ml of liquid paraffin to each 1-2mmol of selenium powder, stirring for 30-60 minutes under nitrogen atmosphere to remove water and oxygen, heating to 220 ℃ under nitrogen atmosphere, and generating bright orange selenium precursor solution after the selenium powder is completely dissolved;
(3) stirring and heating the selenium precursor solution generated in the step (2) to 220 ℃ at constant temperature in a nitrogen atmosphere, maintaining for 40 minutes, adding oleylamine according to the proportion that 2-10ml of oleylamine is added to each 1mmol of selenium powder, stirring for 1-10 minutes, adding the cadmium precursor obtained in the step (1) into the selenium precursor, and adding the cadmium precursor into the cadmium precursor according to the molar ratio of cadmium to selenium of 1:1-10:1 to form the cadmium selenide quantum dot stock solution.
(4) And (4) purifying and separating the stock solution of the cadmium selenide quantum dots generated in the step (3), removing redundant oleic acid and other impurities, and finally dispersing the cadmium selenide quantum dots in n-hexane for dilution to obtain the product.
Further, the purification and separation processing method in the step (4) comprises the following steps: centrifuging the cadmium selenide stock solution and excessive methanol, removing supernatant, taking the lower layer, and repeatedly centrifuging and separating for multiple times to obtain the lower layer purified cadmium selenide quantum dots.
Further, the amount of cadmium selenide added to the methanol was centrifuged in an amount of 1.5 to 2.5 times by volume.
In the invention, the quantum dots are in a sphere-like shape under a transmission electron microscope, and the size of the cadmium selenide quantum dots is basically consistent with the estimated size and has good uniform size and shape.
In the invention, when the molar ratio of cadmium to selenium is 2:1, an orange yellow fluorescent quantum dot solution with the size of 3.6nm is obtained;
when the molar ratio of cadmium to selenium is 4:1, the green fluorescent quantum dot solution with the size of 3.1nm is obtained;
when the molar ratio of cadmium to selenium is 1:1, the orange fluorescent quantum dot solution with the size of 4.2nm is obtained.
The invention has the beneficial effects that: the cadmium selenide quantum dots are synthesized by an oleic acid/liquid paraffin system, the synthesis raw materials are economic and cheap, the operation is simple, the environment is protected, the repeatability is strong, and the growth process is easy to control; the introduced surfactant oleylamine can not only obtain quantum dots with larger size in a shorter time, but also effectively passivate the surface defects of the quantum dots; meanwhile, the synthesized cadmium selenide quantum dots with specific sizes have good fluorescence performance, and a certain preparation basis and basis are provided for the subsequent application of the cadmium selenide quantum dots.
Drawings
Fig. 1 is a graph of absorption-emission spectra of cadmium selenide quantum dots in example 1 of the present invention.
Fig. 2 is a diagram of the morphology of the cadmium selenide quantum dots in example 1 of the present invention under a transmission electron microscope.
Fig. 3 is a graph of absorption-emission spectra of cadmium selenide quantum dots in example 2 of the present invention.
Fig. 4 is a graph of absorption-emission spectra of cadmium selenide quantum dots in example 3 of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are provided only for illustrating the present invention and not for limiting the scope of the present invention.
Example 1: preparing the CdSe quantum dots with the particle size of 3.6 nm.
The preparation steps are as follows:
(1) weighing 1.284g (10mmol) of cadmium oxide, weighing 15ml of oleic acid, weighing 10ml of liquid paraffin, putting into a 250ml three-neck flask, introducing nitrogen for 30 minutes to discharge air, heating and stirring to 150 ℃ in the nitrogen atmosphere, and generating light yellow transparent cadmium oleate serving as a cadmium precursor solution for later use after the cadmium oxide is completely dissolved;
(2) weighing 0.079g (1mmol) of selenium powder, weighing 50ml of liquid paraffin, putting the liquid paraffin into another three-neck flask, introducing nitrogen for 30 minutes to discharge air, heating and stirring the mixture to 220 ℃ under the nitrogen atmosphere, and generating a transparent bright orange selenium precursor solution after the selenium powder is completely dissolved;
(3) measuring 10ml of oleylamine, adding the generated selenium precursor solution, adding 5ml of cadmium precursor after 5 minutes, keeping the molar ratio of cadmium to selenium in the solution at 2:1, and taking out the cadmium selenide quantum dots after 5 minutes of heat preservation;
(4) adding excessive methanol into the taken quantum dot stock solution, centrifuging (10000rpm, 10 minutes), removing supernatant, repeating the centrifuging step for more than two times, and finally taking the lower layer of quantum dot solution to dissolve in 10ml of n-hexane.
The prepared cadmium selenide quantum dots show orange yellow fluorescence under the irradiation of a 365nm ultraviolet lamp, and the peak value of an ultraviolet-visible region absorption peak is at 574 nm; the fluorescence emission peak value is 597nm, the emission peak is symmetrical, and the half-peak width is 40nm when the fluorescence is excited by 405nm exciting light.
According to the empirical estimation formula of the size of the cadmium selenide quantum dots given in the documents E.Valcheva et al./Colloids and Surfaces A: Physicochem.Eng.Aspects 461, (2014), 158-. The sizes of the cadmium selenide quantum dots obtained by the two estimation methods are consistent.
Fig. 2 is a transmission electron microscope image of the prepared cadmium selenide quantum dot, the statistical range of the particle size is 3.5-3.7nm, and the size of the cadmium selenide quantum dot is consistent with that calculated according to the positions of an absorption peak and a fluorescence emission peak.
Example 2: preparing the CdSe quantum dots with the particle size of 3.1 nm.
The method is the same as the step of example 1, except that the amount of the cadmium precursor added in the step (3) is 10ml, the molar ratio of cadmium to selenium in the solution is 4:1, and the heat preservation time is 1 minute.
The prepared cadmium selenide quantum dots show green fluorescence under the irradiation of a 365nm ultraviolet lamp. As shown in FIG. 3, the peak value of the UV-visible absorption peak was found to be 551nm, and the peak value of the fluorescence emission peak was found to be 578nm when the sample was excited with 405nm excitation light.
According to the empirical estimation formula of the size of the cadmium selenide quantum dots given in the documents E.Valcheva et al./Colloids and Surfaces A: Physicochem.Eng.Aspects 461, (2014), 158-. The sizes of the cadmium selenide quantum dots obtained by the two estimation methods are consistent.
Example 3: preparing 4.2nm CdSe quantum dots.
The method is the same as the step of example 1, except that the amount of the cadmium precursor added in the step (3) is 2.5ml, the molar ratio of cadmium to selenium in the solution is 1:1, and the heat preservation time is 10 minutes.
The prepared cadmium selenide quantum dots show orange fluorescence under the irradiation of a 365nm ultraviolet lamp. As shown in FIG. 4, the peak value of the ultraviolet-visible absorption peak was measured to be 591nm, and the peak value of the fluorescence emission peak was measured to be 613nm when the sample was excited with 405nm excitation light.
According to the empirical estimation formula of the size of the cadmium selenide quantum dots given in the documents E.Valcheva et al./Colloids and Surfaces A: Physicochem.Eng.Aspects 461, (2014), 158-. The sizes of the cadmium selenide quantum dots obtained by the two estimation methods are consistent.
The foregoing examples are provided for illustration and description of the invention only and are not intended to limit the invention to the scope of the described examples. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed.
Claims (8)
1. A green preparation method of cadmium selenide quantum dots with specific sizes is characterized by comprising the following steps:
s1, placing cadmium oxide, oleic acid and liquid paraffin in a three-neck flask, stirring and heating in a nitrogen atmosphere until the cadmium oxide is completely dissolved, and taking the cadmium oxide, oleic acid and liquid paraffin as a cadmium precursor solution for later use;
s2, placing selenium powder and liquid paraffin in another three-neck flask, stirring and heating the mixture in a nitrogen atmosphere until the selenium powder is completely dissolved to generate a selenium precursor solution;
s3, stirring and heating the selenium precursor solution generated in the step S2 to 220 ℃ at a constant temperature in a nitrogen atmosphere, maintaining the temperature for 40 minutes, adding oleylamine, stirring for 1-10 minutes, and adding the cadmium precursor obtained in the step S1 into the selenium precursor to form a cadmium selenide quantum dot stock solution;
and S4, purifying and separating the cadmium selenide quantum dot stock solution generated in the step S3, removing redundant oleic acid and other impurities, and finally dispersing the cadmium selenide quantum dots in n-hexane for dilution to obtain the product.
2. The green preparation method of the cadmium selenide quantum dot with the specific size as claimed in claim 1, wherein the molar ratio of the cadmium oxide to the oleic acid in the step S1 is 1:2-1:5, and the volume ratio of the liquid paraffin to the oleic acid is 1:2-1: 3.
3. The green preparation method of cadmium selenide quantum dots with specific size according to claim 1 or 2, wherein the stirring time in the step S1 is 30-60 minutes, and the heating temperature is 150 ℃.
4. The green preparation method of the cadmium selenide quantum dot with the specific size according to claim 1, wherein the selenium powder and the liquid paraffin are added in the step S2 according to the proportion of adding 20-50ml of the liquid paraffin to 1-2mmol of the selenium powder, the stirring time is 30-60 minutes, and the heating temperature is 220 ℃.
5. The green preparation method of the cadmium selenide quantum dot with the specific size as claimed in claim 1, wherein oleylamine is added in the step S3 according to the proportion of adding 2-10ml oleylamine to 1mmol of selenium powder.
6. The green preparation method of the cadmium selenide quantum dot with the specific size as claimed in claim 1, wherein the amount of the cadmium precursor in the step S3 is added according to the molar ratio of cadmium to selenium of 1:1-10:1 to form the stock solution of the cadmium selenide quantum dot.
7. The green preparation method of cadmium selenide quantum dots with specific size according to claim 1, wherein the purification and separation processing method in step S4 is as follows: centrifuging the cadmium selenide stock solution and excessive methanol, removing supernatant, taking the lower layer, and repeatedly centrifuging and separating for multiple times to obtain the lower layer purified cadmium selenide quantum dots.
8. The green preparation method of cadmium selenide quantum dots with specific size as claimed in claim 7, wherein the amount of cadmium selenide added to methanol in an amount of 1.5-2.5 times by volume is centrifuged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911106026.3A CN110655923A (en) | 2019-11-13 | 2019-11-13 | Green preparation method of cadmium selenide quantum dots with specific size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911106026.3A CN110655923A (en) | 2019-11-13 | 2019-11-13 | Green preparation method of cadmium selenide quantum dots with specific size |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110655923A true CN110655923A (en) | 2020-01-07 |
Family
ID=69043547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911106026.3A Pending CN110655923A (en) | 2019-11-13 | 2019-11-13 | Green preparation method of cadmium selenide quantum dots with specific size |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110655923A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111621297A (en) * | 2020-06-17 | 2020-09-04 | 南通创亿达新材料股份有限公司 | Cadmium selenide quantum dot and solid-phase preparation method thereof |
| CN112159652A (en) * | 2020-09-18 | 2021-01-01 | 大连民族大学 | Preparation method of CdSe/CdS core-shell structure quantum dot |
| CN115159473A (en) * | 2022-05-27 | 2022-10-11 | 北京理工大学 | Application of selenium precursor in quantum dot synthesis |
-
2019
- 2019-11-13 CN CN201911106026.3A patent/CN110655923A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| 刘培朝: "CdSe/CdS/ZnS和CsPbX3量子点的制备及在LED中的应用", 《中国优秀硕士论文全文数据库》 * |
| 杨卫海: "油胺/油酸稳定的CdSe量子点的绿色合成", 《分析测试学报》 * |
| 王春: "绿色化学途径合成硒化物半导体量子点", 《中国博士学位论文全文数据库》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111621297A (en) * | 2020-06-17 | 2020-09-04 | 南通创亿达新材料股份有限公司 | Cadmium selenide quantum dot and solid-phase preparation method thereof |
| CN112159652A (en) * | 2020-09-18 | 2021-01-01 | 大连民族大学 | Preparation method of CdSe/CdS core-shell structure quantum dot |
| CN115159473A (en) * | 2022-05-27 | 2022-10-11 | 北京理工大学 | Application of selenium precursor in quantum dot synthesis |
| CN115159473B (en) * | 2022-05-27 | 2024-04-19 | 北京理工大学 | Application of selenium precursor in quantum dot synthesis |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Shao et al. | White light emission in Bi 3+/Mn 2+ ion co-doped CsPbCl 3 perovskite nanocrystals | |
| CN111348674B (en) | Cs3Cu2X5Preparation method of (X ═ Cl, Br and I) nanocrystal and product | |
| CN110655923A (en) | Green preparation method of cadmium selenide quantum dots with specific size | |
| Wang et al. | Synthesis and photoluminescence characteristics of Dy3+-doped ZnAl2O4 nanocrystals via a combustion process | |
| EP3448957A1 (en) | Stable inp quantum dots with thick shell coating and method of producing the same | |
| Wang et al. | Polychromatic visible photoluminescence in porous ZnO nanotubes | |
| Shen et al. | Phosphine-free synthesis of Zn 1− x Cd x Se/ZnSe/ZnSe x S 1− x/ZnS core/multishell structures with bright and stable blue–green photoluminescence | |
| US6869544B2 (en) | Process for producing nanoscale yttrium aluminum garnet (YAG) fluorescent powders | |
| Rai et al. | Synthesis, growth mechanism and photoluminescence of monodispersed cubic shape Ce doped YAG nanophosphor | |
| JP2019504811A (en) | InP quantum dots having GaP and AlP shells and method for producing the same | |
| Kowsari et al. | Synthesis by an ionic liquid-assisted method and optical properties of nanoflower Y2O3 | |
| Xia et al. | Aqueous synthesis of luminescent magic sized CdSe nanoclusters | |
| Yang et al. | Facile synthesis and color-tunable properties of monodisperse β-NaYF 4: Ln 3+(Ln= Eu, Tb, Tm, Sm, Ho) microtubes | |
| Yu et al. | Synthesis and photoluminescence properties of Bi2S3 nanowires via surfactant micelle-template inducing reaction | |
| Zhu et al. | Plasma-assisted synthesis of ZnSe hollow microspheres with strong red emission | |
| Du et al. | Synthesis and properties of ZnS quantum dots by an oil-water interface method | |
| Wang et al. | High quality zinc-blende CdSe nanocrystals synthesized in a hexadecylamine–oleic acid–paraffin liquid mixture | |
| Kuo et al. | Synthesis and characterization of highly luminescent CuInS2 and CuInS2/ZnS (core/shell) nanocrystals | |
| Kuang et al. | Synthesis and luminescence properties of NaGdF 4: Yb 3+, Ce 3+, and Ho 3+ upconversion nanoparticles doped with Zn 2+ | |
| CN110078116B (en) | Perovskite CsPbBr3Quantum dot and preparation method and application thereof | |
| Yu et al. | The synthesis of ZnS: Mn2+ nano-particles by solid-state method at low temperature and their photoluminescence characteristics | |
| Feng et al. | Controllable synthesis, growth mechanism and optical properties of the ZnSe quantum dots and nanoparticles with different crystalline phases | |
| Zhang et al. | Formation of highly luminescent Zn1− xCdxSe nanocrystals using CdSe and ZnSe seeds | |
| JP2013060593A (en) | Preparation of nanoparticle with narrow luminescence spectrum | |
| Wang et al. | A facile route to synthesize luminescent YVO4: Eu3+ porous nanoplates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200107 |
|
| RJ01 | Rejection of invention patent application after publication |