Full-wavelength local plasma resonant transducer and preparation method thereof

A resonant sensor and plasma technology is applied in the sensor field to achieve the effects of high application value, easy processing and low cost

Active Publication Date: 2015-07-15
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of existing aluminum plasma materials, provide an aluminum nanomaterial substrate with localized plasma resonance peaks in the full wavelength range for sensing, and realize its uniform structure and large area manufacturing

Method used

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  • Full-wavelength local plasma resonant transducer and preparation method thereof
  • Full-wavelength local plasma resonant transducer and preparation method thereof
  • Full-wavelength local plasma resonant transducer and preparation method thereof

Examples

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Embodiment 1

[0036] Example 1 Preparation of full-wavelength localized plasmon resonance sensor

[0037] 1. attached Figure 1~2 A schematic diagram of a full-wavelength localized plasmon resonance sensor prepared for the present invention. The full-wavelength localized plasmon resonance sensor is characterized in that the sensor is an aluminum film whose surface structure is a nanocone array arranged periodically. The nanocones are formed by interlacing periodically arranged smooth depressions after the aluminum film is subjected to nanoimprinting and electrochemical etching.

[0038] attached image 3 For the preparation process of the method of the present invention, the following detailed steps are included:

[0039] S1. Place the silicon template with periodic bumps on the surface of the clean and flat aluminum film in parallel, and apply a pressure of about 2×10 4 N / cm 2 , uniformly embossing nano pits;

[0040] S2. Connect the imprinted aluminum film on the electrochemical w...

Embodiment 2

[0046] Example 2 Refractive index biosensing

[0047] Using the sensor of the present invention to detect the concentration of biochemical samples is achieved by comparing the baseline spectrum of the sensor with the spectrum cultivated by the sample to be tested, extracting the shift of the characteristic peak, and then calculating the concentration of the biochemical sample to be tested according to the calibration standard curve. The tumor marker CA199 in the serum of patients with colon cancer was selected for concentration detection, and all spectral measurements during the detection process were performed using Figure 6 Measurement model.

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Abstract

The invention discloses a full-wavelength local plasma resonant transducer and a preparation method thereof. The sensor is actually an aluminum nano conical array, wherein the nano conical array is formed by the recesses, which are periodically arranged on the surface of an aluminum sheet. By adjusting the incidence angle, three sizes of a cone, and the length of the arrangement period, different local surface plasma resonance peaks in the full-length range can be obtained and are capable of being applied to high-sensitivity refractive index sensor, surface enhanced fluorescence, surface enhanced Raman scattering, and the like according to the different needs. The preparation technology is simple, the structure is controllable, the cost is low, and the resonant transducer can be massively produced.

Description

technical field [0001] The invention belongs to the technical field of sensors. More specifically, it relates to a sensor with local plasmon resonance peaks in the full wavelength range of ultraviolet-visible-near-infrared light region and its preparation method. Background technique [0002] Metal nanoparticles or array substrates can match the incident light fluctuations with the surface plasmon waves without coupling prisms, optical waveguides or diffraction gratings. Under the incident light of a specific wavelength band, the surface plasmons can be stably excited and the incident light Localized in the region of subwavelength scale, this phenomenon is called localized plasmon resonance, which is widely used in the fields of refractive index sensing, surface-enhanced fluorescence, surface-enhanced Raman scattering, and nonlinear enhancement. So far, most of the research on localized surface plasmon sensing has focused on precious metal materials such as gold and silver....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/552
Inventor 周建华李万博江雪芹
Owner SUN YAT SEN UNIV
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