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Nano island film with enhanced Raman signal and method for preparing nano island film

A Raman signal and homogeneity technology, applied in the field of nano-island film preparation and detection, can solve the problems of poor uniformity and high cost of nano-island films, and achieve the effects of low cost, low preparation cost and reliable experimental results.

Inactive Publication Date: 2012-10-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods generally require special instruments, so the cost is high, and the prepared nano-island membranes are usually poor in uniformity

Method used

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  • Nano island film with enhanced Raman signal and method for preparing nano island film
  • Nano island film with enhanced Raman signal and method for preparing nano island film
  • Nano island film with enhanced Raman signal and method for preparing nano island film

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Effect test

preparation example Construction

[0026] The preparation method of the nano-island membrane of the present invention:

[0027] Step 1) Prepare a silica ethanol solution with a volume ratio of 1:400~1:100, insert the glass slide vertically, and take out the glass slide after 3-5 days to obtain 3-5 layers distributed in an array And it is a silicon dioxide layer composed of closely arranged silicon dioxide particles;

[0028] The particle size of the silica particles is 50-500nm;

[0029] Step 2) Distribute silica gel baffles on both sides of the silica layer, and then pour polystyrene toluene solution with a volume ratio of 1:10 on the silica layer on the surface of the glass slide to cover the silica layer , dry for 3-5 days, after forming a solid polystyrene membrane, it will automatically fall off from the surface of the glass slide, so that the silicon dioxide particles on the solid surface of the polystyrene membrane protrude from the surface of the polystyrene membrane;

[0030] Step 3) Soak the diaphra...

Embodiment 1

[0034] Embodiment 1: the preparation of a kind of nano-island film

[0035] Such as figure 2 As shown, configure a silicon dioxide / ethanol solution with a volume ratio of 1:200, insert the slide glass 11 vertically, and take out the slide glass after 3-5 days to obtain 3-5 layers of layers distributed in an array and in the form of The silicon dioxide layer 12 is composed of closely arranged silicon dioxide particles. Silica gel baffles 13 are arranged on both sides of the silicon dioxide layer. After pouring polystyrene / toluene solution 14 with a volume ratio of 1:10, dry for 3-5 days, and the polystyrene film will automatically fall off to obtain a dry product. Polystyrene membrane. On the side of the polystyrene membrane that is in contact with the glass slide, there will be some exposed silica. Put the polystyrene membrane into 50 ml of ethanol solution, add 30 microliters of 3-aminopropyltriethoxysilane, place it on a shaker at 150 rpm for 12 hours, then take it out a...

Embodiment 2

[0036] Embodiment 2: the preparation of a kind of nano-island film

[0037] Such as figure 2As shown, configure a silicon dioxide / ethanol solution with a volume ratio of 1:400, and insert the slide glass 11 vertically, and take out the slide glass after 3-5 days to obtain 3-5 layers of layers distributed in an array and in the form of The silicon dioxide layer 12 is composed of closely arranged silicon dioxide particles. Silica gel baffles 13 are arranged on both sides of the silicon dioxide layer. After pouring a polystyrene / toluene solution 14 with a volume ratio of 1:10, and drying for 3 days, the polystyrene film will automatically fall off, and dry polystyrene film can be obtained. vinyl film. On the side of the polystyrene membrane that is in contact with the glass slide, there will be some exposed silica. Put the polystyrene membrane into 50 ml of ethanol solution, add 30 microliters of 3-aminopropyltriethoxysilane, place it on a shaker at 150 rpm for 12 hours, then...

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Abstract

The invention discloses a nano island film with an enhanced Raman signal. The nano island film comprises a polystyrene film and silicon dioxide layers which are laminated together, wherein metal nano material layers wrap the surfaces of silicon dioxide particles, which are protruded on the polystyrene film. A method for preparing the nano island film comprises the following steps of: firstly, tightly arranging silicon dioxide particle layers on the surface of slide glass by using a vertical deposition method; secondly, injecting polystyrene into the silicon dioxide layers, drying, and aminating the surface, namely connecting amino to the surface of silicon dioxide, which is protruded on the polystyrene; thirdly, absorbing gold nano particles to the surface of the silicon dioxide; and finally, adding growth liquid and a hydrogen dioxide solution, stirring and growing, and thus obtaining the nano island film with the enhanced Raman signal. The island film is low in preparation cost and high in uniformity. The island film is a good Raman enhanced substrate.

Description

technical field [0001] The invention relates to the technical field of preparation and detection of a nano-island membrane, more specifically, a nano-island membrane with enhanced Raman signal and a preparation method thereof. Background technique [0002] As a fast and sensitive detection method, surface-enhanced Raman spectroscopy (SERS) has been widely used in chemistry, physics, medicine, biology, environmental monitoring and other fields. The two enhanced substrates initially used in SERS research are the traditional solid phase substrate and the metal colloid solution. These two kinds of substrates are less used in quantitative SERS research because their surfaces are not uniform enough. In recent years, due to the development and wide application of nanofabrication and characterization methods, SERS-enhanced substrates with plasmon resonance nanostructures prepared by nanofabrication techniques also received more and more attention. The researchers believe that for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65B82Y30/00B82Y40/00
Inventor 钱卫平陶琴
Owner SOUTHEAST UNIV
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