Embedded type nano dot array surface enhanced Raman active substrate and preparation method thereof

A surface-enhanced Raman and active substrate technology, applied in nanotechnology, nanotechnology, Raman scattering, etc., can solve the problems of difficult transfer, fragile AAO, cumbersome steps, etc., and achieve simple preparation process, easy industrial production, and low cost low effect

Inactive Publication Date: 2015-09-30
SHANGHAI UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This method not only inherits all the advantages of the AAO template method, but also completely overcomes the shortcomings of the AAO template method, such as cumbersome steps, difficult transfer, and fragile AAO.

Method used

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  • Embedded type nano dot array surface enhanced Raman active substrate and preparation method thereof
  • Embedded type nano dot array surface enhanced Raman active substrate and preparation method thereof
  • Embedded type nano dot array surface enhanced Raman active substrate and preparation method thereof

Examples

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Embodiment 1

[0027] Example 1: In this example, an aluminum substrate with an ordered pit array structure after anodic oxidation and removal of the oxide layer was used as a template to prepare a large-area ordered and uniform Ag nano-dot array structure, and a 1× 10 -7 M's rhodamine (rhodamine 6G, R6G) was used as the probe molecule for the surface Raman spectrum test. The specific steps are:

[0028] 1) First, ultrasonically clean a 0.2 mm thick 99.999% aluminum sheet with acetone for 30 minutes, anneal at 450~550°C for 5 hours under nitrogen protection, and take it out for later use;

[0029] 2) Take out the aluminum sheet treated in 1) and place it in a mixture of ethanol and perchloric acid (volume ratio 1:9) at a temperature of 0°C, and electrochemically polish it under constant current (600 mA) for about 5 minutes to obtain Spare aluminum sheet;

[0030] 3) Oxidize the pretreated spare aluminum sheet in 0.3M oxalic acid at 45V and 2°C for 8-12 h;

[0031] 4) Take it out, put it ...

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Abstract

The invention discloses a preparation method of a novel embedded type nano dot array structure surface enhanced Raman active substrate. The substrate takes an aluminum sheet with an ordered concave pit array structure on the surface as a template and materials with SERS (Surface Enhanced Raman Scattering) performances are deposited to obtain a large-area and highly-ordered nano dot array structure embedded into a groove on the concave pit substrate. The nano dot array provided by the invention can be used for adjusting structure parameters and shapes of the embedded type nano dot array according to the size of the concave pit array, so that different influences on the Raman surface enhancing effect by different embedded type metal nano array substrates are realized. The preparation method has the advantages of simplicity in operation, no need of transferring, low cost and easiness for industrial production; the shape of the substrate is highly ordered and the Raman activity is high; and the substrate has the remarkable Raman surface enhancing effect on analytes with different concentrations and has very high detection limit.

Description

technical field [0001] The invention relates to an embedded nano-dot array surface-enhanced Raman active substrate and a preparation method thereof, in particular to a preparation method of a silver nano-dot array surface-enhanced Raman active substrate based on a pit template method surface nano-preparation technology. Background technique [0002] Surface-enhanced Raman Scattering (SERS) refers to the measurement of samples adsorbed on the surface of some specially prepared metals (such as precious metal gold, silver), sol or blends, the Raman signal of the adsorbed molecules is large Since its discovery in 1974, after decades of development, it has now become a mature and effective molecular vibrational spectroscopy analysis tool, because of its high sensitivity, it can detect the adsorption on the metal surface Monomolecular layer, which can give the structural information of surface molecules, has a wide range of applications in chemical products, materials and life sci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65B82Y30/00B82Y40/00C23C14/04
Inventor 林伟雷勇付群郑贤正王欣吴明红
Owner SHANGHAI UNIV
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