Noble metal nanoarray extinction spectrum measurement device and sensing detection method thereof

A nano-array and spectral measurement technology, which is used in measurement devices, color/spectral property measurement, testing of moving fluids/granular solids, etc., can solve the problems of high detection cost and unsatisfactory detection accuracy of molecular mass spectrometry, and achieve detection sensitivity. High, the detection process is fast and convenient, and the effect of reducing the detection cost

Active Publication Date: 2020-03-17
东营睿港投资服务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these commonly used methods can effectively realize the sensing and detection of the concentration of organic solutions, they also have their own shortcomings. For example, the absorption spectroscopy method based on the Lambert-Beer law is only suitable for the detection of low concentration (<0.01mol / L) solutions; Gas / liquid chromatography based on the principle of material separation and adsorption and molecular mass spectrometry based on molecular ionization technology have high detection costs; Raman spectroscopy based on inelastic scattering of light and matter is easily affected by fluorescence and optical system parameters. not ideal

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  • Noble metal nanoarray extinction spectrum measurement device and sensing detection method thereof
  • Noble metal nanoarray extinction spectrum measurement device and sensing detection method thereof
  • Noble metal nanoarray extinction spectrum measurement device and sensing detection method thereof

Examples

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Embodiment 1

[0049] A kind of noble metal nano-array extinction spectrum measuring device proposed in this embodiment, such as figure 1 As shown, it includes a white light source 2, a beam lifter 3 for changing the beam propagation path, a microscopic assembly 4, a sample holder 5 for clamping the tested sample so that the tested sample is placed horizontally, and an optical signal collector 6 , a spectrometer 7 and a computer terminal 8, the beam emitted by the white light source 2 is incident on the microcomponent 4 after being changed by the beam lifter 3, and the focused beam emitted by the microcomponent 4 is incident on the sample 9 to be measured, and the optical signal is collected The detector 6 receives the focused light beam transmitted through the tested sample 9, and transmits the focused light beam to the spectrometer 7, and the spectrometer 7 outputs spectral signals to the computer terminal 8.

[0050] In this specific embodiment, the beam lifter 3 is composed of a first su...

Embodiment 2

[0057] A kind of precious metal nano-array extinction spectrum measuring device proposed in this embodiment is a further improvement to the device in embodiment one, as figure 2 and image 3 As shown, that is, it also includes a first three-dimensional position adjustment device for adjusting the position of the sample holder 5, a second three-dimensional position adjustment device for adjusting the position of the optical signal collector 6, and a base 1 (see figure 1), the first three-dimensional position adjustment device is composed of a first positioning plate 51, a first three-dimensional displacement platform 52 installed on the first positioning plate 51, a first connecting rod 53 connecting the first three-dimensional displacement platform 52 and the sample holder 5, Adjust the position of the sample holder 5 through the first micrometer screw 521, the second micrometer screw 522 and the third micrometer screw 523 in the first three-dimensional displacement platform ...

Embodiment 3

[0061] This embodiment proposes a method for realizing the sensing and detection of ethanol solution concentration by using the noble metal nanoarray extinction spectrum measuring device of Embodiment 2, which includes the following steps:

[0062] ① Using the existing electron beam etching technology, a gold nanoarray with a periodic structure is prepared on the conductive glass deposited with a conductive film. The gold nanoparticles are nano-columns with a diameter of 200 nanometers and a height of 75 nanometers. The gold nanoparticles The spacing between them is 50 nanometers, and the scanning electron microscope (SEM) pictures of them are as follows Figure 4 shown; then the conductive glass with gold nanoarrays was used as the tested sample.

[0063] Here, the conductive glass can be selected from a glass substrate deposited with a conductive film, or a plexiglass substrate deposited with a conductive film, and the conductive film is an ITO (Indium-Tin Oxide, indium tin ...

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Abstract

The invention discloses a noble metal nano-array extinction spectrum measuring device and a sensing detection method thereof. The noble metal nano-array extinction spectrum measuring device comprisesa white light source, a light beam lifter, a microscopic assembly, a sample fixture, an optical signal sampler, a spectrometer and a computer terminal. The light beam emitted from the white light source change the propagation path by the light beam lifter to incident to the microscopic assembly, the focused light beam emitted from the microscopic assembly incident to a sample to be detected, the focused light beam subjected to transmission by the sample to be detected is received by the optical signal sampler and is transferred to the spectrometer, the spectral signal output from the spectrometer is transferred to the computer terminal, the concentration of organic solution can be calculated by the computer terminal according to the extinction peak position change of the extinction spectrum of the sample detected which is relative to the extinction spectrum of the noble metal nano-array. The noble metal nano-array extinction spectrum measuring device can realize the accurate position measurement for extinction spectrum of the noble metal nano-array with a complex structure and a micrometer grade size and has the following advantages that the concentration detection process is simple, the cost is low, and the sensitivity is high.

Description

technical field [0001] The invention relates to a sensing detection technology for the concentration of an organic solution, in particular to a noble metal nano-array extinction spectrum measurement device and a method for realizing the sensing detection of the concentration of an organic solution by using the device. Background technique [0002] It is well known that the extinction properties of noble metal nanoparticles have a strong dependence on their own size, morphology and the surrounding medium. The extinction characteristics of noble metal nanoparticles can be characterized and analyzed by measuring the extinction spectrum. Generally, the extinction spectrum of noble metal nanoparticles is obtained by measuring the absorption spectrum of the colloidal solution of noble metal nanoparticles. For extinction spectroscopy, it is necessary to simultaneously measure the scattering and absorption spectra of the noble metal nanoarrays. At present, the scattering spectrum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/01G01N21/31G01N21/85
CPCG01N21/01G01N21/3103G01N21/85
Inventor 吴冠毅周骏王鹏陈栋张珠峰王泓熹姜涛顾辰杰
Owner 东营睿港投资服务有限责任公司
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