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

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 ...

Images