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Gold nano bipyramid with five-fold twin structure and preparation method thereof

A five-fold twinning, gold nanotechnology, applied in the field of gold nanomaterials, can solve the problem that gold nanoparticles do not have near-infrared light absorption performance, and achieve the effects of good near-infrared light absorption performance, environmental friendliness, and low cost

Active Publication Date: 2018-10-12
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the technical problems in the prior art that gold nanoparticles with a twin structure do not have near-infrared light absorption properties, the present invention provides a gold nano-pyramid with a five-fold twin structure and a preparation method thereof, which not only have Good near-infrared light absorption performance and high catalytic activity of the twin crystal structure, and the preparation process is simple, low-cost, and environmentally friendly. It has important application value and broad application prospects in the fields of infrared imaging, photothermal therapy, and catalysis.

Method used

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  • Gold nano bipyramid with five-fold twin structure and preparation method thereof
  • Gold nano bipyramid with five-fold twin structure and preparation method thereof
  • Gold nano bipyramid with five-fold twin structure and preparation method thereof

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preparation example Construction

[0024] A kind of gold nano bipyramid with quintuple twin structure, its preparation method comprises the steps:

[0025] Step A, preparing gold nano decahedrons in ethylene glycol by polyalcohol reduction method.

[0026] Step B, mixing hydroquinone, chloroauric acid and the gold nano-decahedron together, so that the concentration of hydroquinone in the mixed solution is 0.001-0.004 mole / liter, and the concentration of chloroauric acid is 0.0005- 0.002 mol / liter, the concentration of the gold nano decahedron is 0.0001~0.005 mol / liter, then react at 30~70°C for 10 hours, and then carry out solid-liquid separation (the solid-liquid separation can adopt high-speed centrifugal separation: at a rotating speed Centrifuge with a centrifuge at 1000-15000 rpm for 10-100 minutes, then remove the colorless solution in the centrifuge tube), and use deionized water to ultrasonically clean the solid obtained from solid-liquid separation to obtain a monodisperse product with Gold nanopyrami...

Embodiment 1

[0038] A kind of gold nano bipyramid with quintuple twin structure, its preparation method comprises the steps:

[0039]Step a, dissolving polydiallyldimethylammonium chloride (PDDA, Mw=100000~200000, 20wt%) in ethylene glycol solution, then adding chloroauric acid, silver nitrate and ferric chloride aqueous solution in sequence , make polydiallyl dimethyl ammonium chloride concentration be 0.025 mol / liter in the mixed solution, chloroauric acid concentration be 0.0005 mol / liter, silver nitrate concentration be 0.0016 mol / liter, iron trichloride concentration be 0.000001 mol / L, and then react for 1 to 5 hours according to the reaction temperature in Table 1, so that a gold nano-decahedral colloidal solution with the side length of the gold nano-decahedron as shown in Table 1 can be prepared.

[0040] Table 1

[0041] temperature reflex

220℃

210℃

200℃

190℃

180℃

170℃

side length

20nm

23nm

25nm

28nm

32nm

38nm

[004...

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Abstract

The invention discloses a gold nano bipyramid with a five-fold twin structure and a preparation method thereof. A gold nano decahedron is prepared in ethylene glycol by adopting a polyol reduction method; hydroquinone, chloroauric acid and the gold nano decahedron are mixed together so that the concentration of hydroquinone in the mixed solution is 0.001-0.004 mol / L, the concentration of chloroauric acid is 0.0005-0.002 mol / L, and the concentration of the gold nano decahedron is 0.0001-0.005 mol / L; and reacting is then carried out at 30-70 DEG C for 10 hours, and then solid-liquid separation is carried out to obtain the gold nano bipyramid with the five-fold twin structure. The gold nano bipyramid has good near-infrared light absorption performance and high catalytic activity of the twin structure, and has simple preparation process, low cost and environmental friendliness; and the gold nano bipyramid has important application value and wide application prospect in the fields of infrared imaging, photothermal therapy, catalysis and the like.

Description

technical field [0001] The invention relates to the technical field of gold nanomaterials, in particular to a gold nano-pyramid with a five-fold twin structure and a preparation method thereof. Background technique [0002] Gold nanoparticles are noble metal materials with localized surface plasmon resonance properties. Because of the strong localized surface plasmon resonance, they can produce electromagnetic field enhancement effects, good stability and biocompatibility, so gold nanoparticles can be widely used in optical applications. Thermal conversion, biological imaging, information storage, catalysis, surface-enhanced Raman scattering (SERS) detection and many other fields. Studies have shown that the local surface plasmon resonance characteristics of gold nanoparticles are greatly affected by their own size, shape and other structural parameters, which will limit the performance and application fields of gold nanoparticles, so gold nanoparticles with different struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0553B22F1/054
Inventor 李越张涛杭立峰
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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