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Four-branched gold nanoparticles, preparation method and application thereof

A gold nano-particle and nano-gold technology are applied in the fields of four-branched gold nanoparticles, preparation and application thereof, and can solve the problems of uneven size of branched gold nanoparticles, low yield of branched gold nanoparticles, uncontrollable morphology and the like, To achieve the effect of good monodispersity, controllable morphology and high repeatability

Active Publication Date: 2021-06-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the low yield and low repeatability of the method for preparing branched gold nanoparticles in the prior art, or the prepared branched gold nanoparticles are not uniform in size, uncontrollable in shape or poor in uniformity, etc. Shortcomings, thereby providing a kind of four-branched gold nanoparticle with ligand A, preparation method and application thereof

Method used

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  • Four-branched gold nanoparticles, preparation method and application thereof
  • Four-branched gold nanoparticles, preparation method and application thereof
  • Four-branched gold nanoparticles, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] 1.1 Preparation of nano-gold seed solution with ligand A:

[0095] (1) configuration concentration is 0.14mol / L cetyltrimethylammonium bromide aqueous solution 3.5mL, concentration is the tetrachloroauric acid solution 10mL of 15mmol / L, concentration is the sodium borohydride aqueous solution 15mL of 0.01mol / L ( An ice-water bath).

[0096] (2) Adding 130 μL concentration of 15 mmol / L tetrachloroauric acid aqueous solution to 3.5 mL of cetyltrimethylammonium bromide aqueous solution of 0.14 mol / L, under magnetic stirring (1200 rpm) and when the temperature is at room temperature , adding 500 μL of sodium borohydride aqueous solution with a concentration of 0.01 mol / L, the color of the solution changed from yellow to brown rapidly. After stirring for 2 minutes, place it in a water bath at 25°C and set aside.

[0097] The prepared method is about 100nM nano gold seed solution with ligand A.

[0098] 1.2 Preparation of four-branched gold nanoparticles with ligand A

[...

Embodiment 2

[0106] Other operations are the same as in Example 1, and the only difference is that the amount of the nano-gold seed solution with ligand A added in step (2) is 2.5 μL (the nano-gold seed with ligand A is added in the reaction solution of step (2). The molar volume concentration in is 1.8*10 - 11 mol / L, the amount of deionized water increased by 2.5 microliters, to ensure that the total volume of the system is exactly the same as step (2) in Example 1, the size length * width of the obtained four-branched gold nanoparticles is 28.2 * 9.1nm, resulting in The rate is 58%.

Embodiment 3

[0108] Other operations are the same as in Example 1, the only difference is that the amount of the nano-gold seed solution with ligand A added in step (2) is 1 μL, the size length * width of the particle is 29.8*9.4nm, and the yield is 40% .

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Abstract

The invention discloses a four-branched gold nano particle, a preparation method and an application thereof. The single arm length of the four-branched gold nanoparticles provided by the present invention is 10-30nm, and the single-arm width is 5-15nm; the growth directions of the four branches of the four-branched gold nanoparticles are all <110> directions, and the space is symmetrical Sex belongs to D 2d Point group; the four branches are two groups of branches, each group has two branches perpendicular to each other, and the planes of the two groups of branches are perpendicular to each other; the ligand A is a cationic surfactant. The four-branched gold nanoparticles have narrow absorption spectrum peaks and high intensity, good monodispersity and controllable morphology, simple and mild preparation method, fast reaction rate, high repeatability and easy scale-up.

Description

technical field [0001] The invention relates to a four-branched gold nano particle, a preparation method and an application thereof. Background technique [0002] Compared with bulk materials, metal nanomaterials have more excellent properties in photoelectricity, catalysis, and magnetism. As a noble metal material, gold has very stable chemical properties. In addition to the performance of bulk materials, gold nanoparticles also exhibit rich physical and chemical properties; moreover, their physical and chemical properties can be adjusted by changing their size and shape. Regulation has greatly expanded the application field of gold nanoparticles, and therefore the topic of controlling the morphology of gold nanoparticles has attracted people's attention. [0003] So far, gold nanoparticles with various shapes can be well prepared and regulated, including: gold nanospheres, gold nanorods, gold nanocubes, gold nanotriangles, gold nanoflowers, gold nanobicones, etc. Among t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F1/02B82Y40/00
CPCB82Y40/00B22F1/0553B22F1/16B22F1/054
Inventor 刘堃常艺馨张宁宁孙天盟张俊虎
Owner JILIN UNIV
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