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Fluorescent AgInS2 and AgInS2/ZnS nano-crystal prepared by microwave-assisted method

A technology of nanocrystals and nanocrystals, applied in the field of fluorescent AgInS2 and AgInS2/ZnS nanocrystals, which can solve the problems of preparing complex precursors, reducing quantum yield and stability, and being difficult to directly apply to the biological field

Inactive Publication Date: 2013-12-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of them need to be synthesized in organic solvents, and some reactions require the preparation of complex precursors
Due to the synthesis by organic solvents, the hydrophobicity makes them difficult to be directly applied to the biological field
However, transferring them from the organic phase to the aqueous phase by the phase transfer method will reduce their quantum yield and stability.

Method used

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  • Fluorescent AgInS2 and AgInS2/ZnS nano-crystal prepared by microwave-assisted method
  • Fluorescent AgInS2 and AgInS2/ZnS nano-crystal prepared by microwave-assisted method
  • Fluorescent AgInS2 and AgInS2/ZnS nano-crystal prepared by microwave-assisted method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1. Fluorescent AgInS 2 and AgInS 2 / ZnS nanocrystal preparation

[0020] AgInS 2 Nanocrystals were synthesized by microwave irradiation with 0.06 ml of 0.1M AgNO 3 Aqueous solution, 0.4 mL 0.1M In(NO 3 ) 3 The aqueous solution and 1.6 ml of 0.1 M glutathione aqueous solution were sequentially added to 18.4 mL of deionized water, and the pH was adjusted to 8.5 with 1 M NaOH. During this process, the solution changed from cloudy to clear. Then add 0.8 ml of 0.05M Na 2 S aqueous solution. Then the above solution was transferred to a microwave reactor with a volume of 80 ml, and reacted with microwave radiation for 5 minutes, the temperature was set at 100° C., and the power was 200 W. Cool to 50°C to obtain fluorescent AgInS 2 Nanocrystalline.

[0021] AgInS2 / Preparation of ZnS nanocrystals. The above-prepared AgInS 2 nanocrystals, add 0.8 ml of 0.1M Zn(AC) 2 aqueous solution and 0.8 mL of 0.05M Na 2 S aqueous solution, continue microwave radiation ...

Embodiment 2

[0023] Example 2. Fluorescent AgInS 2 and AgInS 2 / ZnS nanocrystal preparation

[0024] AgInS 2 Nanocrystals were synthesized by microwave irradiation with 0.08 ml of 0.1M AgNO 3 Aqueous solution, 0.4 mL 0.1M In(NO 3 ) 3 The aqueous solution and 1.6 ml of 0.1 M glutathione aqueous solution were sequentially added to 18.4 ml of deionized water to adjust the pH to 8.5. During this process, the solution changed from cloudy to clear. Then add 0.8 ml of 0.05M Na 2 S aqueous solution. Then the above solution was transferred to a microwave reactor with a volume of 80 ml, and reacted with microwave radiation for 5 minutes, the temperature was set at 100° C., and the power was 200 W. Cool to 50°C to obtain fluorescent AgInS 2 Nanocrystalline.

[0025] AgInS 2 / Preparation of ZnS nanocrystals. The above-prepared AgInS 2 nanocrystals, add 0.8 ml of 0.1M Zn(AC) 2 aqueous solution and 0.8 mL of 0.05M Na 2 S aqueous solution, continue microwave radiation reaction for 5 minut...

Embodiment 3

[0027] Example 3. Fluorescent AgInS 2 and AgInS 2 / ZnS nanocrystal preparation

[0028] AgInS 2 Nanocrystals were synthesized by microwave irradiation with 0.1 ml of 0.1M AgNO 3 Aqueous solution, 0.4 mL 0.1M In(NO 3 ) 3 The aqueous solution and 1.6 ml of 0.1 M glutathione aqueous solution were sequentially added to 18.4 ml of deionized aqueous solution to adjust the pH to 8.5. During this process, the solution changed from cloudy to clear. Then add 0.8 ml of 0.05M Na 2 S aqueous solution. Then the above solution was transferred to a microwave reactor with a volume of 80 ml, and reacted with microwave radiation for 5 minutes, the temperature was set at 100° C., and the power was 200 W. Cool to 50°C to obtain fluorescent AgInS 2 Nanocrystalline.

[0029] AgInS 2 / Preparation of ZnS nanocrystals. The above-prepared AgInS 2 nanocrystals, add 0.8 ml of 0.1M Zn(AC) 2 aqueous solution and 0.8 mL of 0.05M Na 2 S aqueous solution, continue microwave radiation reaction f...

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Abstract

The invention provides a fluorescent AgInS2 or AgInS2 / ZnS nano-crystal. The nano-crystal is characterized in that the grain size of the AgInS2 or AgInS2 / ZnS nano-crystal is 2.2 to 2.9nm and 2.5 to 3.2nm, respectively; the maximal emission wavelength is 570nm and 540nm, respectively; the maximal fluorescence quantum yield reaches 14% and 40%, respectively, and the fluorescent life is 342ns and 414.5ns, respectively. The invention also discloses a preparation method of the nano-crystals.

Description

technical field [0001] The present invention relates to fluorescent AgInS 2 and AgInS 2 / ZnS nanocrystals. Background technique [0002] In the past ten years, quantum dots have experienced a period of rapid development, especially II-VI cadmium quantum dots are widely used in solar cells, LEDs, sensors and biological imaging. However, the application of cadmium-based quantum dots is limited due to the toxic element cadmium. This requires finding a new low-toxicity nanoparticles to replace cadmium-based quantum dots. (See: (a) M.Shalom, S.Ruhle, I.Hod, S.Yahav, A.Zaban, J.Am.Chem.Soc., 2009, 131, 9876. (b) I.L.Medintz, A.R.Clapp, H. Mattoussi, E.R. Goldman, B. Fisher, J.M. Mauro, Nat. Mater., 2003, 2, 630. (c) P. Zrazhevskiy, M. Sena, X. H. Gao, Chem. Soc. Rev., 2010, 39, 4326. (d) Y.Y.Shen, L.L.Li, Q.Lu, J.Ji, R.Fei, J.R.Zhang, E.S. Abdel-Halim, J.J.Zhu, Chem.Commun., 2012, 48, 2222. (e) K.M.Tsoi, Q . Dai, B.A. Alman, W.C.W. Chan, Acc. Chem. Res., 2013, 46, 662.). ...

Claims

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Application Information

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IPC IPC(8): C09K11/62C01G15/00B82Y30/00
Inventor 朱俊杰熊维伟杨国海吴兴才
Owner NANJING UNIV
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