A surface-enhanced fluorescence substrate of au-cu/ag-al nanometer multilayer film and its application

Abstract

The invention discloses an Au-Cu / Ag-Al nano-multilayer-film surface enhanced fluorescent base and application thereof. A glass slide is cleaned and dried in a blowing manner for use; an Au-Cu composite target and a Ag-Al composite target are correspondingly installed on a direct current cathode, the cleaned glass slide is contained into a sample table, machining starting is performed, and vacuumizing is performed; and then argon is introduced, a sputtering power source is turned on, Au-Cu and Ag-Al are subjected to alternate sputtering, sputtering is completed, the sputtering power source is turned off, gas introducing stops, a molecular pump is turned off, a power source is turned off, cooling is performed under the natural vacuum condition till room temperature is achieved, and then a sample is taken out. The Au-Cu / Ag-Al nano-multilayer-film surface enhanced fluorescent base is easy to operate, environment-friendly, high in deposition speed and efficiency, low in production cost and easy to produce on a large scale. A film is of a multi-layer structure, and is prepared by alternately depositing Au-Cu and Ag-Al on glass, and an adopted instrument is a common magnetron sputtering instrument.

Description

technical field [0001] The invention belongs to the field of spectroscopy, and in particular relates to an Au-Cu / Ag-Al nanometer multilayer film surface-enhanced fluorescent substrate and its application. Background technique [0002] As an important modern spectral technology, fluorescence technology has the advantages of high sensitivity, simple operation, rapid detection, no need for sample pretreatment, etc., and meets the needs of real-time online monitoring, so it is widely used in the detection of atmosphere, water and other environments. Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous pollutants in the water environment. They have the characteristics of strong inertness, stability, and refractory degradation. It will cause carcinogenic, sakigenic, mutagenic and other hazards to the human body. Therefore, the earlier the PAH pollutants in the water environment are predicted, the more harmful they can be avoided in time, which puts forward new requirements for ...

AI Technical Summary

Problems solved by technology

The substrates currently used for fluorescence surface enhancement are generally elemental gold or silver films prepared by chemical reduction methods, which can only enhance a very narrow range of fluorescence, and there are problems that the deposition rate cannot be precisely controlled, and the film preparation process pollutes the environment. And other issues

Professor Sun Xiudong of Harbin Institute of Technology theoretically predicted that the mutual coupling of surface plasmon polaritons and localized surface plasmons in each layer of a multilayer film structure can achieve further enhancement of fluorescence, but related experimental studies have not been reported yet.

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