Method for preparing Au and Agx (Au) 1-x nano-crystals through organic phases

A nanocrystal and synthesis method technology, which is applied in the field of Au and Agx1-x nanocrystal preparation, can solve problems such as the complexity of the nanocrystal process, and achieve the effects of simple and efficient procedures, a large size distribution range, and easy operation

Inactive Publication Date: 2013-02-13
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the current preparation of Au and Ag x (Au) 1-x The complex problem of nanocrystal process

Method used

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  • Method for preparing Au and Agx (Au) 1-x nano-crystals through organic phases
  • Method for preparing Au and Agx (Au) 1-x nano-crystals through organic phases
  • Method for preparing Au and Agx (Au) 1-x nano-crystals through organic phases

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Synthesis of Au nanocrystals: Take 5 mL of oleylamine (oleyamine) and add it to a 25 mL three-neck flask, blow nitrogen gas for about 30 minutes, raise the temperature to 180 °C, and quickly inject organic gold salt (AuPPh 3 Cl) in chloroform. Au nanocrystals with different sizes can be obtained at different sampling times. The prepared Au nanocrystals were centrifuged and purified with a mixed solution of n-hexane and methanol to obtain pure Au nanocrystals. TEM of Au nanocrystals as figure 1 As shown, the absorption diagram as figure 2 shown.

Embodiment 2

[0020] Synthesis of Au nanocrystals: Take 5 mL of oleylamine (oleyamine) and add it to a 25 mL three-neck flask, blow nitrogen gas for about 30 minutes, raise the temperature to 220 °C, and quickly inject organic gold salt (AuPPh 3 Cl) Chloroform solution. Quickly lower the temperature to 180°C. Au nanocrystals with different sizes can be obtained by sampling at different times. The prepared Au nanocrystals were centrifuged and purified with a mixed solution of n-hexane and methanol to obtain pure Au nanocrystals. XRD of Au nanocrystals as image 3 shown

Embodiment 3

[0022] Synthesis of Au nanocrystals: Take 5 mL of octadecylamine (octadecylamine) and add it to a 25 mL three-neck flask, blow nitrogen gas for about 30 minutes, raise the temperature to 180 °C, and quickly inject organic gold salt (AuPPh 3 Cl) Chloroform solution. Rapidly lower the temperature to 150°C. Au nanocrystals with different sizes can be obtained by sampling at different times. The prepared Au nanocrystals are centrifuged and purified with a mixed solution of n-hexane and methanol to obtain pure Au nanocrystals.

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Abstract

The invention relates to a method for preparing Au and Agx (Au) 1-x nano-crystals through organic phases. Stable organic gold salts of AuPPh3Cl serve as a precursor of gold to prepare Au and Agx (Au) 1-x nano-crystals. Avoiding current international seed growing methods by which water phases are used for synthesizing Au and Agx (Au) 1-x nano-crystals of large sizes, the method is simple in experiment processes and uses oleyamine as a reductant, a stabilizer and a dissolvent of Au. Prepared Au nano-crystal sizes are in a range of 5 nm to 100 nm, nanorod sizes range from 60 nm to 100 nm, nano cube sizes range from 6 nm to 15 nm, and absorption peaks are in a range of 530 nm to 560 nm. Prepared Agx (Au) 1-x nano-crystal sizes are in a range of 6 nm to 15 nm, and absorption peaks are in a range of 450 nm to 510 nm. Au and Agx (Au) 1-x nano-crystals prepared by the method can be transferred to water phases and can exist stably. According to the method, the method is simple and efficient, the reaction condition is mild, reagents are easy to obtain, the method is repeatable, and the synthesizing of Au nano-crystals with widely distributed sizes is controllable.

Description

technical field [0001] The present invention relates to Au and Ag x (Au) 1-x Nanocrystal preparation method. Specifically, the simple and efficient synthesis of Au and Ag with different sizes in the organic phase, mild reaction conditions, readily available reagents, reproducible and controllable x (Au) 1-x Nanocrystalline. Background technique [0002] Metal nanocrystals, especially Au and Ag x (Au) 1-x Nanocrystals are a hot research topic in recent years. Due to Au and Ag x (Au) 1-x Nanocrystals can be combined with a variety of biomolecules (nucleic acid, protein and biomolecules), easy to label, harmless to the human body, and the activity of the labeled substance basically does not change after labeling. Au nanocrystals with different particle sizes can be used for multiple labeling. By regulating Au and Ag x (Au) 1-x The size and shape of nanocrystals can also make them widely used in other fields, such as catalysts, electron transfer theory and information...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 李林松徐巍巍
Owner HENAN UNIVERSITY
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