Rectangular bimetallic nano rod with gold nucleus and palladium shell and method for making the same

A technology of bimetallic nanometer and gold nanorod is applied in the field of single crystal gold core/palladium shell structure bimetallic nanorod and its preparation, and achieves the effects of reduced dependence, high yield and low energy consumption

Inactive Publication Date: 2008-02-27
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the research on the preparation of gold-palladium core-shell structure using gold nanorods as templates, only a few nanometer-scale spherical palladium particles have been obtained to grow around the surface of gold nanorods (J.H.Song, F.Kim, D.Kim, P.D.Yang, Chem.Eur.J.2005, 11,910-916.), the preparation of the rectangular palladium nanorods of epitaxial growth has not been reported

Method used

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  • Rectangular bimetallic nano rod with gold nucleus and palladium shell and method for making the same
  • Rectangular bimetallic nano rod with gold nucleus and palladium shell and method for making the same
  • Rectangular bimetallic nano rod with gold nucleus and palladium shell and method for making the same

Examples

Experimental program
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Effect test

Embodiment 1

[0044] First configure the following solutions:

[0045] 0.1M cetyltrimethylammonium bromide (C 19 h 42 N + Br - , hereinafter referred to as CTAB) aqueous solution: Weigh 3.64g of cetyltrimethylammonium bromide (analytical grade) and dissolve it in 100mL of deionized water. It should be placed in a constant temperature water bath at 30°C to dissolve completely before use.

[0046] 0.1M ascorbic acid (AA) aqueous solution: Weigh 0.176g of ascorbic acid (analytical pure) and dissolve it in 10mL of deionized water, and prepare temporarily before use.

[0047] 10mM tetrachloroauric acid (HAuCl 4 ·3H 2 O) Aqueous solution: Weigh 0.393g tetrachloroauric acid (analytical pure, domestic) and dissolve it in 100mL deionized water.

[0048] 10mM silver nitrate (AgNO 3 ) aqueous solution: Weigh 0.425g of silver nitrate (analytical grade) and dissolve it in 250mL of deionized water. Keep away from light.

[0049] 2mM H 2 PdCl 4 Aqueous solution: Weigh 0.035g of palladium dichl...

Embodiment 2-3

[0061] Example 2-3: Effect of the purification of gold nanorods on the growth of palladium shell structure

Embodiment 2

[0063] Adjust the concentration of the gold nanorod solution obtained in step 2 of Example 1 to 0.1 mM, take 4 mL of the above gold nano rod solution and put it into a test tube, add 22 μL of AA solution with a concentration of 0.1 M to 2 mL of CTAB solution with a concentration of 0.1 M, Then add the above mixed solution to the test tube containing the gold nanorod solution and shake well, and finally add 125 μL of 2 mM H 2 PdCl 4 The aqueous solution was mixed evenly and placed in a constant temperature water bath at 30°C. After 12 hours, the reaction solution was centrifuged 2 to 4 times to obtain bimetallic nanorods with a gold core / palladium shell structure, the morphology of which is shown in Figure 3a.

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Abstract

The present invention provides a rectangular bimetallic nano rod monocrystal with gold-core / palladium shell and its preparation method. It includes a cylindrical gold nano rod internal core and a rectangular palladium shell layer which can be used for covering external surface of said cylindrical gold nano rod internal core. The diameter of the described cylindrical gold nano rod internal core is 10-15nm, and its length is 45-55nm; and the length of said rectangular palladium shell layer is 50-62nm, its width is 14-24nm and its height is 14-24nm.

Description

technical field [0001] The invention relates to a single-crystal gold core / palladium shell structure bimetal nanorod and a preparation method thereof. The method realizes the epitaxial growth of a rectangular palladium shell structure on a cylindrical gold core structure by controlling the reaction process. Background technique [0002] For metal nanoparticles, size, composition, crystallinity, shape and structure have a significant impact on their properties, especially optical properties. Since the mid-nineties, shape-controlled synthesis has attracted much attention because in many cases it is easier to achieve fine tuning of material properties than several other factors. For example, existing research work has shown that the peak position and number of plasmon resonance peaks on metal surfaces and the effective spectral range of surface-enhanced Raman scattering can be tuned by controlling the shape of metal nanostructures. Therefore, the shape-controlled synthesis has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/02C30B29/62C30B7/00B22F9/24
CPCC30B7/00
Inventor 吴晓春向彦娟解思深
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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