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Method of producing three fundamental quantum dot CdSeTe

A ternary quantum dot and quantum dot technology, which is applied in the field of nanotechnology preparation, can solve the problems of high synthesis temperature, limited scale preparation, and high price, and achieve the effect of simple operation and low preparation cost

Inactive Publication Date: 2008-02-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still uses expensive and toxic TOPO and HAD (hexadecylamine) as reaction solvents and ligands, and the synthesis temperature is high (300 ° C), which limits the large-scale preparation of this alloy quantum dots

Method used

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  • Method of producing three fundamental quantum dot CdSeTe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (a) Measure 0.65mL oleic acid and 9.35mL liquid paraffin and mix them in a three-neck bottle A, heat to 150°C, add 0.13g CdO powder, make the molar ratio of Cd to oleic acid 1:2, and wait for the CdO powder After complete dissolution, a Cd precursor solution is obtained;

[0023] (b) Measure 9.87mL of liquid paraffin and 0.13mL of TOP and mix them in the three-necked bottle B, add 0.004g of Se powder to make the molar ratio of Se to TOP 1:5, make Se under the condition of nitrogen protection and rapid mechanical stirring. Powder dissolves completely, obtains TOPSe solution;

[0024] (c) Measure 9.67mL of liquid paraffin and 0.33mL of TOP and mix them in a three-neck flask C, add 0.019g of Te powder to make the molar ratio of Te to TOP 1:5, make Te under the condition of nitrogen protection and rapid mechanical stirring. The powder was completely dissolved to obtain a TOPTe solution.

[0025] (d) Mix the TOPSe solution and the TOPTe solution so that the molar ratio of ...

Embodiment 2

[0030] (a) Measure 1.3mL of oleic acid and 8.7mL of liquid paraffin and mix them in a three-neck flask A, heat to 150°C, add 0.26g of CdO powder, make the molar ratio of Cd to oleic acid 1:2, and wait for the CdO powder After complete dissolution, a Cd precursor solution is obtained;

[0031] (b) Measure 9.5mL of liquid paraffin and 0.5mL of TOP and mix them in the three-necked bottle B, add 0.008g of Se powder to make the molar ratio of Se to TOP 1:10, make Se under the condition of nitrogen protection and rapid mechanical stirring. Powder dissolves completely, obtains TOPSe solution;

[0032](c) Measure 8.5mL of liquid paraffin and 1.5mL of TOP and mix them in a three-neck flask C, add 0.038g of Te powder to make the molar ratio of Te to TOP 1:10, and make Te under the conditions of nitrogen protection and rapid mechanical stirring. The powder was completely dissolved to obtain a TOPTe solution.

[0033] (d) Mix the TOPSe solution and the TOPTe solution so that the molar r...

Embodiment 3

[0038] (a) Measure 1.3mL of oleic acid and 8.7mL of liquid paraffin and mix them in a three-neck flask A, heat to 150°C, add 0.26g of CdO powder, make the molar ratio of Cd to oleic acid 1:2, and wait for the CdO powder After complete dissolution, a Cd precursor solution is obtained;

[0039] (b) Measure 9mL of liquid paraffin and 1mL of TOP and mix them in the three-necked bottle B, add 0.016g of Se powder to make the molar ratio of Se to TOP 1:10, make the Se powder completely under the condition of nitrogen protection and rapid mechanical stirring Dissolving, obtains TOPSe solution;

[0040] (c) Measure 9 mL of liquid paraffin and 1 mL of TOP and mix them in a three-neck flask C, add 0.026 g of Te powder to make the molar ratio of Te to TOP 1:10, and make the Te powder completely under nitrogen protection and rapid mechanical stirring. Dissolved to obtain TOPTe solution.

[0041] (d) Mix the TOPSe solution and the TOPTe solution so that the molar ratio of Se to Te is 1:1,...

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Abstract

The invention discloses a making method of CdSeTe as ternary quantum point in the nanometer technical domain, which comprises the following steps: adopting cadmium oxide or cadmium inorganic salt as Cd source, Se powder as Se source and Te powder as Te powder; making long chain fat dissolve the cadmium oxide or cadmium inorganic salt to form Cd prosoma; using phosphine to dissolve Se and Te to form Se and Te prosoma; reacting Cd prosoma, Te prosoma and Se prosoma in the liquid paraffin; obtaining CdSeTe quantum point; adopting long-chain fat as the stabilizer to generate the CdSeTe quantum point. The invention improves the fluorescent quantum efficiency in the near-infrared zone with even grain size distribution and good stability, which can be widely used in the biology due to good dispersibility, evenness and optical property of CdSeTe quantum point product.

Description

technical field [0001] The invention relates to a preparation method in the field of nanotechnology, in particular to a preparation method of ternary quantum dot CdSeTe. Background technique [0002] In recent years, nanotechnology has become one of the frontier fields of widespread concern, and quantum dots (QDs) are semiconductor nanoparticles composed of II-VI and III-V elements with a diameter of 1-10nm. , can receive excitation light to produce fluorescence, and the wavelength of fluorescence emission can be adjusted by changing the size of quantum dots, so quantum dots of different sizes can be excited by a single wavelength of light to emit fluorescence of different colors, and have high fluorescence quantum A series of special optical properties such as efficiency, molar extinction coefficient (10-1000 times that of organic dyes), narrow and symmetrical fluorescence emission spectrum, large Stokes shift between excitation and emission spectra, strong photobleaching r...

Claims

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Application Information

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IPC IPC(8): C09K11/88
Inventor 孙康李万万邢滨王解兵
Owner SHANGHAI JIAO TONG UNIV
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