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Method for preparing gold micron crystal with surface enhanced Raman active branched surface

A surface-enhanced Raman and activity technology, applied in the growth of polycrystalline materials, chemical instruments and methods, crystal growth, etc., can solve problems such as complex synthesis methods, and achieve novel surface morphology and large-scale effects

Inactive Publication Date: 2008-03-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

However, there are few studies on the application of this type of Au nanostructures (such as surface-enhanced Raman activity), and their synthesis methods are relatively complicated, and the large-scale (micron, submicron) type of Au nanostructures There are few reports (Sau, T.K.; Murphy, C.J. Room Temperature, High-Yield Synthesis of Multiple Shapes of Gold Nanoparticles in Aqueous Solution. J. Am. Chem. Soc. 2004, 126, 8648.)

Method used

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  • Method for preparing gold micron crystal with surface enhanced Raman active branched surface
  • Method for preparing gold micron crystal with surface enhanced Raman active branched surface
  • Method for preparing gold micron crystal with surface enhanced Raman active branched surface

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Prepare 10ml of 1mM HAuCl in a round bottom flask 4 aqueous solution, stirred magnetically, and then added dropwise 0.5ml of 200mM Na 2 Aqueous EDTA, HAuCl 4 with Na 2 The molar ratio of EDTA was 1:10, the reaction temperature was set at 25° C., and the reaction was stopped after 3 hours of reaction. The resulting precipitate was centrifuged and washed to obtain gold microcrystals with surface-enhanced Raman activity on a multi-branched surface. For scanning electron microscope characterization, see Figure 1.

Embodiment 2

[0021] The reaction temperature was set at 50° C., and other test conditions were consistent with Example 1, and gold microcrystals with surface-enhanced Raman activity on a multi-branched surface were obtained. The resulting product was characterized by a scanning electron microscope, as shown in Figure 2.

Embodiment 3

[0023] The reaction temperature was set at 100° C., and other test conditions were consistent with Example 1, and gold microcrystals with surface-enhanced Raman activity on a multi-branched surface were obtained. The resulting product was characterized by a scanning electron microscope, see Figure 3.

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Abstract

The present invention relates to a preparation method for golden micro-crystal with a branchy surface with enhanced Raman scattering activities. The present invention uses disodiumedetate (Na2EDTA) as reductant and appearance controlling reagent for the first time, three kinds of gold micro-crystal are prepared through the mixing of the disodiumedetate and hydrochloroauric acid (HAuCl4) at different temperatures, and the three kinds of gold micro-crystal have a novel branchy surface and a micron sized measurement. The operation of the method is simple, and the prepared gold micro-crystal has high surface-enhanced Raman scattering activitiesand application value in the analysis field.

Description

technical field [0001] The invention relates to nano material preparation technology. Background technique [0002] In recent years, metallic nanoparticles have attracted extensive attention due to their novel optical, electrical, thermal, and catalytic properties. At the same time, the physical and chemical properties of nanostructures are closely related to their size and shape. To date, the synthesis of spherical metal nanoparticles has been extensively reported, while the synthesis of shape-controlled nanomaterials remains a challenge for materials scientists. For metallic Au, several research groups have synthesized gold nanostructures with various morphologies, such as nanorods, nanowires, nanobelts, nano / microsheets, and nanopolyhedra, using different chemical methods. Recently, a series of Au nanoparticles with multi-branched surfaces have been reported, which has attracted extensive attention. Such branched nanoparticles are considered promising in surface-enhanc...

Claims

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Application Information

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IPC IPC(8): C30B29/02C30B29/60C30B7/14C22B3/44C22B11/00B22F9/24
CPCY02P10/20
Inventor 由天艳王大为
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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