Surface plasma resonance and surface reinforced Raman combined spectral investigator

A technology of surface-enhanced Raman and surface plasmon, applied in color/spectral characteristic measurement, Raman scattering, instrumentation, etc., to achieve high detection sensitivity and signal-to-noise ratio

Inactive Publication Date: 2005-08-24
JILIN UNIV
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Problems solved by technology

[0002] In the 30 years since the discovery of the surface-enhanced Raman spectroscopy (abbreviation: SERS) effect, although surface plasmon resonance spectroscopy (abbreviation: SPR) produced by various SERS active substrate surfaces or nanoparticles has a close relationship with SERS in the electromagnetic enhancement mechanism , but few people have measured them jointly and analyzed their interrelationships

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  • Surface plasma resonance and surface reinforced Raman combined spectral investigator
  • Surface plasma resonance and surface reinforced Raman combined spectral investigator

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Embodiment 1

[0025] See figure 1 , 1 is a light source system, which is composed of a laser light source 21, followed by an optical mechanism that can adjust the excitation angle and polarization state, including a goniometer ( figure 1 Not shown in ) and polarizer 22, the goniometer can adopt the structure of θ-2θ goniometer or double-ring synchronous goniometer structure. 2 is a sample stage, and the sample stage 2 adopts a right-angled or semicircular or hemispherical prism 23, and a substrate 24 with SERS activity modified with silver or gold is compounded on the bottom surface of the prism, and 25 is a modification of silver or gold material film, the test sample 26 is placed on the substrate 24, 27 represents the evanescent wave, and 28 represents the surface plasma wave. 4 is a microscope system, wherein 13 is an objective lens, 14 is a filter, 15 is a polarizer, 16 is a lens, 17 is a reflector, 18 is an aperture, and 19 is an eyepiece; 5 is a SERS signal detection system, and the ...

Embodiment 2

[0028] The fluid sampling system can be composed of devices including a stepping motor, a sample pool placed on the bottom surface of the prism 23, a sample recovery pool, and an infusion pipeline.

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Abstract

The invention is a surface plasma syntonizing and surface enhanced Raman spectrum measure apparatus. Its main structure consists of laser source 21, angular instrument of initiate angle and polarize status adjustable together with polarize fins forms the light source system; sample table consists of edge glass of semi-circular or right angle or hemisphere and a basal chip with SERS activity. SERS signal detecting system made up of spectrograph and CCD detector. SPR signal detector is installed on one side of the edge glass while the light source system on the other side. The invention is adopted with the SPR detecting method of variable angle internal reflection, initiating the sample in the elapse field to obtain the SERS spectrum, and synchronizingly obtaining the SPR spectrum and the further enhanced SERS spectrum under syntonizing enhancing angle. Higher detecting sensitivity and s/n ratio can be obtained when measuring the SERS signal under dim background.

Description

technical field [0001] The invention belongs to the field of analysis experiment equipment. In particular, it relates to a device for synchronous detection of laser Raman spectrum and surface plasmon resonance absorption spectrum. Background technique [0002] In the 30 years since the discovery of the surface-enhanced Raman spectroscopy (abbreviation: SERS) effect, although surface plasmon resonance spectroscopy (abbreviation: SPR) produced by various SERS active substrate surfaces or nanoparticles has a close relationship with SERS in the electromagnetic enhancement mechanism However, few people have measured them jointly and analyzed their relationship. In the past two years, with the rapid development of these two technologies, especially the continuous deepening of people's understanding of the special size effect of nanoparticles and thin films, this issue has only begun to attract attention. The development of SPR-SERS spectrometer will provide an important experime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/00G01N21/31G01N21/65
Inventor 徐蔚青赵冰徐抒平卜凤泉徐翔
Owner JILIN UNIV
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