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Preparation method of nanometer gold bar mainly made of (200) crystal face

A technology of nano-gold rods and crystal planes, applied in the field of high-yield synthesis and preparation of nano-gold rods, to achieve the effects of strong operability, simple and easy preparation methods, and controllable shape and size

Active Publication Date: 2012-04-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to prepare more active gold nanorods dominated by (200) facets is still a challenge.

Method used

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  • Preparation method of nanometer gold bar mainly made of (200) crystal face
  • Preparation method of nanometer gold bar mainly made of (200) crystal face
  • Preparation method of nanometer gold bar mainly made of (200) crystal face

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Experimental program
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Effect test

Embodiment 1

[0044] In this embodiment, the preparation process of nano-gold rods based on (200) crystal planes includes the following steps:

[0045] (1) Preparation of the growth solution of nano-gold rods mainly based on (200) crystal face:

[0046] In an environment where the temperature is higher than room temperature, take 1 mL of chloroauric acid tetrahydrate (HAuCl) with a molar concentration of 5 mM 4 4H 2 (2) solution, add 5mL molar concentration respectively and be the hexadecyltrimethylammonium bromide (CH of 0.2M 3 (CH 2 ) 15 NBr(CH 3 ) 3 ) solution and 100uL silver nitrate (AgNO 3 ) solution, stirred for 10min; then quickly added 1mL of hydroxylamine hydrochloride (NH 2 OH·HCl) solution, and continue to stir for 2 min; then use a buffer solution to adjust the pH value of the growth solution to 5.68, and prepare 7.1 mL of a growth solution for synthesizing (200)-based gold nanorods.

[0047] (2) Preparation of gold seeds of nano-gold rods based on (200) crystal face: ...

Embodiment 2

[0058] In this embodiment, the preparation process of nano-gold rods based on (200) crystal planes includes the following steps:

[0059] (1) Preparation of growth solution for synthesis of (200) crystal plane-based nano-gold rods:

[0060] In an environment where the temperature is higher than room temperature, take 100mL of 5mM chloroauric acid tetrahydrate (HAuCl 4 4H 2 (0) solution, add 500mL of 0.2M cetyltrimethylammonium bromide (CH 3 (CH 2 ) 15 NBr(CH 3 ) 3 ) solution and 10mL of 0.01M silver nitrate (AgNO 3 ) solution, stirred for 10min; then quickly added 100mL of 0.1M hydroxylamine hydrochloride (NH 2 OH·HCl) solution, and continue to stir for 2 min; then use a buffer solution to adjust the pH value of the growth solution to 5.0, and prepare 710 mL of a growth solution for synthesizing (200) gold nanorods mainly with crystal planes.

[0061] (2) Preparation of gold seeds for synthesis of (200) crystal plane-based nano-gold rods:

[0062] This step (2) is the...

Embodiment 3

[0067] (1) Preparation of growth solution for synthesis of (200) crystal plane-based nano-gold rods:

[0068] In an environment where the temperature is higher than room temperature, take 100mL of 5mM potassium chloroaurate dihydrate (KAuCl 4 2H 2 (0) solution, add 500mL of 0.2M dodecyl dimethyl benzyl ammonium chloride (CH 3 (CH 2 ) 11 NCl(CH 3 ) 2 CH 2 C 6 h 5 ) solution and 10mL of 0.01M silver nitrate (AgNO 3 ) solution, stirred for 10min; then quickly added 100mL of 0.1M hydroxylamine hydrochloride (NH 2 OH·HCl) solution, and continue to stir for 2 min; then use a buffer solution to adjust the pH value of the growth solution to 6.08, and prepare 710 mL of a growth solution for synthesizing (200) gold nanorods mainly with crystal planes.

[0069] (2) Preparation of gold seeds for synthesis of (200) crystal plane-based nano-gold rods:

[0070] In an environment where the temperature is higher than room temperature, take 1mL of 0.5mM chloroauric acid (HAuCl 4 ) s...

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Abstract

The invention discloses a preparation method of a nanometer gold bar mainly made of (200) crystal face. The method is: adding certain amount of surface active agent, silver salt solution and weak reductant into gold salt solution so as to synthesize growth solution, thus while gold salt is under protection of surface active agent, Au+ or Au3+ is reduced to gold atom by the weak reductant in the growth solution; then adding gold seed into the growth solution, wherein the gold seed is synthesized by adding certain amount of surface active agent and reductant into the gold salt solution, under the induction of silver ion, the surface active agent carrying gold atoms is absorbed on the gold seed which is taken as a growing point, so that a nanometer gold bar mainly made of (200) crystal face is obtained. The method needs temperate condition and is easy to operate, capable of producing nanometer gold bar mainly made of (200) crystal face with controllable shape and size, good water-solubility and sound dispersibility with a high yield. It can be applied into fields of biological analysis, biomedical diagnosis and imaging, biomedical cure, environmental science and analytical science.

Description

technical field [0001] The invention relates to the field of synthesis of nanomaterials, in particular to a high-yield synthesis and preparation method and application of nano gold rods mainly based on (200) crystal planes. Background technique [0002] Gold nanoparticles have excellent optical, magnetic, catalytic and structural properties, and can be combined with a variety of biological macromolecules without affecting their biological activity. Gold nanoparticles with unique physical and chemical properties and superior biocompatibility are widely used in the fields of immunolabeling and rapid detection of food safety. The different structures and morphologies of gold nanoparticles present diverse physical and chemical properties. Therefore, the synthesis of gold nanoparticles with novel structures and different morphologies is of great practical significance for the application in the fields of biomedicine and environmental food safety detection. [0003] At present, ...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 冷玉敏吴爱国尹训君
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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