| Combining analytical instruments integrates two analytical tools into one system that can simultaneously receive multiple signals,which overcomes the shortcomings that only one parameter can obtain when the analytical device is used alone.Through the combination of analytical instruments,multi-angle and in-depth parameters can be obtained.It is essential to develop modern instrumental analysis technology,widely used in various fields,and promote research work deeper.As a spectroscopic method for studying the molecular structure,Raman spectroscopy is widely used for substance identification and molecular structure analysis.Micro-Raman spectroscopy has realized the detection of the characteristic peaks of Raman in the micro-area and has become a director of the rapid development of Raman instruments.The combination of multiple observation instruments has promoted the development of this technology in the direction of real-time in-situ multiparameter.This paper’s primary work is to build the micro-Raman module’s combined use and the microcantilever sensor module to realize the real-time in-situ detection of the material structure and surface stress.The specific work is as follows:1.The construction of the Raman microscope system.The system is mainly composed of the signal light path and observation light path.The optical signal path is responsible for the incidence of laser signals and the collection of Raman scattering signals;the visual observation path is mainly used for white light illumination and micro-area observation on the sample surface.The whole system’s optical path design has a compact structure and high independence,easily combined with other devices.The coaxiality of the signal light path and the observation light path was verified on the completed Raman microscope.The results showed that the system has good coaxiality,which can ensure the microscope’s focus position,the Raman spectrum detection,and analysis point.By comparing the data obtained from the detection of absolute ethanol by using Raman microscopy with the standard Raman spectra of absolute ethanol,the measurement accuracy and system stability are verified.2.Design the microcantilever sensing system to be used in conjunction with the Raman microscope system,and select and design the main components such as lasers and photoelectric position-sensitive detectors.A microcantilever sensing system was successfully built by combining the hardware and software systems,and the relationship between the collected voltage value and the deflection displacement was calibrated.The experiment was verified the thermal working mode of the microcantilever.3.Complete overall construction of the combined Raman-micro cantilever beam system.Furthermore,a combined approach was used to study the molecular structure of azobenzene polymer and the change of surface tension during solid-liquid transition under ultraviolet light/visible light irradiation.The experiment mainly includes the real-time transformation of surface stress under alternate ultraviolet/visible light irradiation and the real-time change of surface tension under continuous alternate ultraviolet/visible light irradiation.The experimental results show that during the solid-liquid transition caused by the cis-trans isomerization of azobenzene polymer under the action of ultraviolet light,the surface tension first increases,and then decreases,and final increases to a stable state.The surface tension of the azobenzene polymer has repetitive changes under continuous alternating UV/visible light irradiation;the more substantial the light intensity,the greater the difference in the azobenzene polymer’s surface tension and the faster the rate of change.Figure 56 table 0 reference 81... |
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