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Water phase preparation method of near infrared silver telluride nano-crystals

An aqueous phase preparation and silver telluride technology, which is applied in the field of material chemistry, can solve the problems of difficult preparation of aqueous silver telluride nanocrystals, difficult preparation of nanocrystals, etc., and achieves near-infrared fluorescence, good chemical stability, and good dispersibility. , the effect of large application prospects

Active Publication Date: 2017-03-22
苏州影睿光学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the near-infrared fluorescence of silver telluride has not been widely studied, mainly because it is difficult to prepare nanocrystals with fluorescent properties, especially the preparation of aqueous phase silver telluride nanocrystals is particularly difficult.

Method used

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  • Water phase preparation method of near infrared silver telluride nano-crystals
  • Water phase preparation method of near infrared silver telluride nano-crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 1 mmol of silver acetate and dissolve it in 25 mL of deionized water, then add 20 mmol of glutathione, stir well, and adjust the pH value to 9 with ammonia water. Add 4 mL of an aqueous solution containing 0.5 mmol of sodium telluride hydride to the above solution dropwise, and react at room temperature for 60 min to obtain monoclinic silver telluride nanocrystals with a fluorescence wavelength of 1100-1400 nm. The fluorescence spectrum is as follows: figure 1 As shown, the phase state of the product is as figure 2 shown.

Embodiment 2

[0022] Weigh 1 mmol of silver acetate and dissolve it in 25 mL of deionized water, then add 2 mmol of 5K molecular weight SH-PEG-NH 2 , stir evenly, and adjust the pH value to 8 with ammonia water. Add 4 mL of an aqueous solution containing 0.2 mmol of sodium telluride hydride to the above solution dropwise, and react at room temperature for 30 min.

Embodiment 3

[0024] Weigh 1 mmol of silver acetate and dissolve it in 25 mL of deionized water, then add 12 mmol of mercaptopropionic acid, stir well, and adjust the pH value to 11 with ammonia water. Add 2 mL of an aqueous solution containing 0.1 mmol of sodium telluride dropwise to the above solution, and react at 70°C for 10 min.

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Abstract

The invention discloses a water phase preparation method of near infrared silver telluride nano-crystals. According to the method, a silver source, a tellurium source and surface ligand molecules are adopted to achieve one-step preparation of water-soluble silver telluride nano-crystals with near infrared fluorescence in a water phase system. The near infrared silver telluride nano-crystals prepared by the method disclosed by the invention has relatively good dispersity in water, the emission wavelength is between 1100 and 1400 nm, and the near infrared fluorescence and chemical stability are relatively good, so that the near infrared silver telluride nano-crystals can be applied to the fields of biological fluorescence labeling, imaging, medicine separation and certain photoelectric devices.

Description

technical field [0001] The invention particularly relates to an aqueous phase preparation method of near-infrared silver telluride nanocrystals, belonging to the technical field of material chemistry. Background technique [0002] Silver telluride as Ag 2 A member of the E family with many unique properties. For example, the low temperature monoclinic phase has high electron mobility and low thermal conductivity, and the high temperature can be transformed into a cubic phase ionic conductor. Of course, since silver telluride is an important narrow band gap direct band gap semiconductor material, it also has near-infrared fluorescence emission properties. Compared with visible light, near-infrared fluorescence has the advantages of large tissue penetration depth, low background fluorescence, and small scattering. It has broad application prospects in biomedical labeling and imaging, and has become a research hotspot at home and abroad. [0003] Silver telluride itself does...

Claims

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Application Information

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IPC IPC(8): C01B19/04C09K11/88
CPCC01B19/04C01P2002/72C01P2002/82C09K11/88
Inventor 孙国凤刘莉丽
Owner 苏州影睿光学科技有限公司
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