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Preparing method for gold nanometer bipyramids

A gold nano-seed technology, which is applied in the field of preparation of gold nano-bicones, can solve the problems of expensive surfactants, harsh synthesis conditions, cumbersome synthesis steps, etc., and achieve the effects of simple equipment, simple preparation, and sensitive response

Inactive Publication Date: 2016-06-15
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current synthesis of gold nanobicones has the following problems: first, the synthesis yield is not high and the purification steps are cumbersome; second, the synthesis conditions are relatively harsh; third, the required surfactants are expensive or require tedious synthesis step

Method used

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  • Preparing method for gold nanometer bipyramids
  • Preparing method for gold nanometer bipyramids
  • Preparing method for gold nanometer bipyramids

Examples

Experimental program
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Embodiment 1

[0028] A kind of preparation method of gold nano bicone, described preparation method comprises the following steps:

[0029] Take 10mL of 0.1M CTAB aqueous solution in a test tube, then add 125μL of 0.01M HAuCl 4 aqueous solution and 125 μL of 0.01M HO 2 PtCl 6 aqueous solution, and finally add 900 μL of freshly configured 0.01M NaBH 4 Ice solution, shake well and place the solution in an oven at 35°C for 2h.

[0030] Take 40mL of 0.1M CTAB aqueous solution in a beaker, add 1.75mL of 0.01M HAuCl in turn 4 aqueous solution, 75 μL of 0.01M H 2 PtCl 6 Aqueous solution, 400 μL of 0.01M AgNO 3 Water solution, 800 μL of 1M HCl solution, 320 μL of 0.1M ascorbic acid aqueous solution was added under stirring conditions, and 100 μL of the above seed solution was added immediately after it became colorless, and placed in an oven at 35°C for 12 hours. And measure its extinction spectrum and scanning electron microscope, such as figure 1 As shown, it can be seen from the figure t...

Embodiment 2

[0032] Take 10mL of 0.1M CTAB aqueous solution in a test tube, then add 125μL of 0.01M HAuCl 4 aqueous solution and 125 μL of 0.01M HO 2 PtCl 6 aqueous solution, and finally add 1000 μL of freshly configured 0.01M NaBH 4 Ice solution, shake well and place the solution in an oven at 35°C for 2h.

[0033] Take 40mL of 0.1M CTAB aqueous solution in a beaker, add 1.75mL of 0.01M HAuCl in turn 4 aqueous solution, 75 μL of 0.01M H 2 PtCl 6 Aqueous solution, 400 μL of 0.01M AgNO 3 Water solution, 800 μL of 1M HCl solution, 320 μL of 0.1M ascorbic acid aqueous solution was added under stirring conditions, and 100 μL of the above seed solution was added immediately after it became colorless, and placed in an oven at 35°C for 12 hours. And measure its extinction spectrum and transmission electron microscope, such as figure 2 with image 3 As shown, it can be seen from the figure that the obtained product is a gold nano-bipyramid structure with an aspect ratio of 3.5.

Embodiment 3

[0035] Take 10mL of 0.1M CTAB aqueous solution in a test tube, then add 125μL of 0.01M HAuCl 4 aqueous solution and 125 μL of 0.01M HO 2 PtCl 6 aqueous solution, and finally add 1100 μL of freshly configured 0.01M NaBH 4 Ice solution, shake well and place the solution in an oven at 35°C for 2h.

[0036] Take 40ml of 0.1M CTAB aqueous solution in a beaker, add 1.75mL of 0.01M HAuCl in turn 4 aqueous solution, 75 μL of 0.01M H 2 PtCl 6 Aqueous solution, 400 μL of 0.01M AgNO 3 Water solution, 800 μL of 1M HCl solution, 320 μL of 0.1M ascorbic acid aqueous solution was added under stirring conditions, and 100 μL of the above seed solution was added immediately after it became colorless, and placed in an oven at 35°C for 12 hours. And measure its extinction spectrum, such as image 3 shown.

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Abstract

The invention discloses a preparing method for gold nanometer bipyramids. The preparing method includes the steps that a CTAB water solution, an HAuC14 water solution, an H2PtC16 water solution and a newly-mixed NaBH4 ice water solution are contained in a container for preparing seeds; and then another container is taken, the CTAB water solution, the HAuC14 water solution, the H2PtC16 water solution, an AgNO3 water solution and an HCI solution are sequentially added, an ascorbic acid water solution is added under the stirring condition, the above seed solution is immediately added to mixed solution after the mixed solution is changed to be colorless, and the obtained solution is put in a thermostatic chamber at the temperature of 35 DEG C for carrying out a reaction. The preparing method is simple in operation, the needed synthesis temperature is low and can be changed along with the adding amount of NaBH4 or the amount of the seeds, and in addition, the gold nanometer bipyramids have a narrow half-peak breadth and are more sensitive to responses to environment changes.

Description

technical field [0001] The invention belongs to the field of inorganic nanomaterials and the field of surface plasmon resonance research, and specifically relates to a preparation method of gold nano bicones. Background technique [0002] Noble metal nanoparticles have rich optical properties due to the localized surface plasmon resonance effect, and this optical response varies with the composition, shape, size and other factors of the particles. Therefore, it has a wide range of applications in biomedicine, catalysis, optics and other fields. [0003] Gold nanoparticles have attracted much attention due to their relatively stable and plastic shapes. Among them, since the gold nanobicones have two tips, the tips have a strong localized surface plasmon resonance effect, and the aspect ratio of the gold nanobicones can be adjusted. Therefore, the preparation of the gold nanobicones is of great significance. [0004] However, the current synthesis of gold nanobicones has the...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0553B22F1/054
Inventor 房彩虹赵贵丽赵俊
Owner ANHUI NORMAL UNIV
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