Full-bloom flower-shaped gold nanoparticle and preparation method thereof

A gold nanoparticle and flower-shaped technology, applied in the field of nanomaterials, can solve the problems of restricting wide application and complicated steps, and achieve the effects of safe and simple operation, simple and mild preparation conditions, and mild reaction

Active Publication Date: 2013-11-27
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, some of the above-mentioned preparation methods are complicated in steps, and some have more or less high requirements for

Method used

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  • Full-bloom flower-shaped gold nanoparticle and preparation method thereof
  • Full-bloom flower-shaped gold nanoparticle and preparation method thereof
  • Full-bloom flower-shaped gold nanoparticle and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The synthesis of bloom-shaped flower-shaped gold nanoparticles does not require gold seeds, and adopts a one-step synthesis scheme, which specifically includes the following steps:

[0040] (1) Prepare an aqueous solution of cetyltrimethylammonium chloride (CTAC) with a concentration of 0.0075 M, and tetrachloroauric acid (HAuCl) with a concentration of 0.4 mM 4 ) aqueous solution and ascorbic acid (AA) aqueous solution with a concentration of 0.05 M.

[0041] (2) At room temperature, add 5 mL of cetyltrimethylammonium chloride (CTAC) aqueous solution and 5 mL of tetrachloroauric acid aqueous solution into the Erlenmeyer flask, stir at room temperature for 3 min, and stir well.

[0042] (3) Add 0.1 mL of the prepared above-mentioned ascorbic acid (AA) aqueous solution to the above-mentioned mixed solution of cetyltrimethylammonium chloride and tetrachloroauric acid, stir for 10 s, and stand at room temperature for reaction to grow gold nanoparticles .

[0043] (4) Aft...

Embodiment 2

[0045] The synthesis of bloom-shaped flower-shaped gold nanoparticles does not require gold seeds, and adopts a one-step synthesis scheme, which specifically includes the following steps:

[0046] (1) Prepare an aqueous solution of cetyltrimethylammonium chloride (CTAC) at a concentration of 0.02 M, and tetrachloroauric acid (HAuCl) at a concentration of 0.5 mM 4 ) aqueous solution and ascorbic acid (AA) aqueous solution with a concentration of 0.08 M.

[0047] (2) At room temperature, add 5 mL of cetyltrimethylammonium chloride (CTAC) aqueous solution and 5 mL of tetrachloroauric acid aqueous solution into the Erlenmeyer flask, stir at room temperature for 3 min, and stir well;

[0048] (3) Add 0.1 mL of the prepared above-mentioned ascorbic acid (AA) aqueous solution into the above-mentioned mixed solution of cetyltrimethylammonium chloride and tetrachloroauric acid, stir for 10 s, and let stand at room temperature to react to grow gold nanoparticles particles;

[0049](4)...

Embodiment 3

[0051] The synthesis of bloom-shaped flower-shaped gold nanoparticles does not require gold seeds, and adopts a one-step synthesis scheme, which specifically includes the following steps:

[0052] (1) Prepare an aqueous solution of cetyltrimethylammonium chloride (CTAC) at a concentration of 0.05 M, and tetrachloroauric acid (HAuCl) at a concentration of 0.6 mM 4 ) aqueous solution and ascorbic acid (AA) aqueous solution with a concentration of 0.1 M.

[0053] (2) At room temperature, add 5 mL of cetyltrimethylammonium chloride (CTAC) aqueous solution and 5 mL of tetrachloroauric acid aqueous solution into the Erlenmeyer flask, stir at room temperature for 4 min, and stir well.

[0054] (3) Add 0.1 mL of the prepared above-mentioned ascorbic acid (AA) aqueous solution to the above-mentioned mixed solution of cetyltrimethylammonium chloride and tetrachloroauric acid, stir for 15 s, and let stand at room temperature to react to grow gold nanoparticles .

[0055] (4) After stan...

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Abstract

The invention discloses full-bloom flower-shaped gold nanoparticle and a preparation method thereof. The preparation method comprises the following steps of: by adopting hexadecyl trimethyl ammonium chloride (CTAC) as a surfactant, reducing chloroauric acid (HAuCl4) by utilizing ascorbic acid (AA); and preparing the full-bloom shaped flower-form gold nanoparticle by one step without seeds by controlling the concentration of the hexadecyl trimethyl ammonium chloride (CTAC). Characterization results of a scanning electron microscope show that the prepared gold nanoparticle is shaped like a full-bloom flower; moreover, the product is uniform and the mono-dispersion is good; the ultraviolet-visible absorption spectrum shows that the surface plasmon resonance peak of the flower-form gold nanoparticle is in a near-infrared area; technical characterization results of surface enhanced raman scattering prove that the flower-form nanoparticle has better surface-enhanced performances.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a shape-anisotropic gold nanoparticle and a preparation method thereof, in particular to a blooming flower-shaped gold nanoparticle and a preparation method thereof. Background technique [0002] The controlled preparation of the size, shape and structure of noble metal (gold, silver) nanoparticles and the corresponding properties have always been a research hotspot and difficulty in materials science and related fields. In the past decade, the shape-controllable preparation of noble metal nanostructures has attracted extensive attention, because it can provide an effective way to tune the electrical, magnetic, optical, and catalytic properties of nanomaterials. The controllable synthesis of shape-anisotropic noble metal nanocrystals is an interesting and challenging work, because these shape-specific nanoparticles have special optical, electrical and catalytic properties, so the...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 汪联辉宋春元周妮黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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