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Preparation method of gold-silver bimetal nanocluster capable of generating near-infrared electrochemical luminescence radiation

A bimetallic nano, chemiluminescence technology, applied in the field of analysis, to achieve the effect of simple steps, stable storage and good bioaffinity

Active Publication Date: 2020-12-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Up to now, there is no preparation method and technology of metal nanoclusters or quantum dots with the maximum radiation wavelength of aqueous phase electrochemiluminescence exceeding 850 nm

Method used

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  • Preparation method of gold-silver bimetal nanocluster capable of generating near-infrared electrochemical luminescence radiation
  • Preparation method of gold-silver bimetal nanocluster capable of generating near-infrared electrochemical luminescence radiation
  • Preparation method of gold-silver bimetal nanocluster capable of generating near-infrared electrochemical luminescence radiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Soak all utensils in freshly prepared aqua regia for 24 hours, rinse thoroughly with ultrapure water and ethanol, and air dry

[0082] (1) 0.085g AgNO 3 (99.8%) was dissolved in 50mL ultrapure water to prepare Ag stock solution (10mM); 1gH 4 AuCl 4 ·3H 2 O (99%) was dissolved in 26 mL ultrapure water to obtain Au stock solution (96 mM); 2.038 g NaOH (96%) was dissolved in 50 mL ultrapure water to obtain NaOH stock solution (1M); 2.715 mL H 2 SO 4 (concentrated sulfuric acid 98%) was dissolved in 50mL ultrapure water to prepare an aqueous ammonia stock solution (2%).

[0083] (2) 0.25 mL of Au solution and 1.2 mL of Ag solution were ultrasonically mixed.

[0084] (3) Weigh 0.40mM methionine, add 0.3mL 1M sodium hydroxide to dissolve, and ultrasonically mix.

[0085] (4) Mix the solution prepared in steps 2 and 3, adjust the pH value to 12.0, incubate at 37 degrees Celsius for 10 hours, centrifuge the final solution at 5000 rpm to remove large particles at the botto...

Embodiment 2

[0088] The steps are the same as in Example 1, except that the powder is collected by centrifugation and ground to test the X-ray energy spectrum analysis spectrum.

Embodiment 3

[0090] The steps were the same as in Example 1, except that the powder was collected by centrifugation, and a 1 mg / mL solution prepared from the powder was dropped on a copper grid to characterize the morphology of nanoclusters.

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PUM

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Abstract

The invention belongs to the field of analysis technical methods, and relates to a preparation method of a gold-silver bimetal nanocluster capable of generating near-infrared electrochemical luminescence radiation. The preparation method comprises the following steps that chloroauric acid is taken as a gold source, silver nitrate is taken as a silver source, and methionine is taken as a reducing agent and a stabilizing agent, and the water-soluble gold-silver bimetal nanocluster is prepared on the basis of a principle method of reducing Au<+>and Ag<+> on line by methionine. According to the preparation method, required raw materials are easily available and have good water solubility, a synthesis device is simple, the conditions are mild, and the operation is safe. The obtained gold-silverbimetal cluster is good in stability and can generate near-infrared electrochemical luminescence with the maximum radiation wavelength greater than 850 nanometers.

Description

technical field [0001] The invention belongs to the field of analytical techniques and methods, and relates to the preparation of a water-soluble gold-silver bimetal nanocluster capable of producing near-infrared electrochemiluminescence. Background technique [0002] Since the Bard research group first reported the electrochemiluminescence of Si nanoparticles in 2002 (Science2002, 296, 1293), the electrochemiluminescence of quantum dot nanomaterials represented by II-VI quantum dots has made a series of progress ( Chem. Rev. 2014, 114, 11027). II-VI QDs usually contain toxic elements, which have potential environmental toxicity and biotoxic exposure risks. Electrochemiluminescence of gold, silver, and copper-like metal nanoparticles with good biocompatibility is gaining widespread attention. Yang et al. found that the electrochemiluminescence of gold nanoclusters can be significantly enhanced by forming a rigid conjugated structure on the surface of metal nanoclusters. Th...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 邹桂征傅莉
Owner SHANDONG UNIV
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