Dark-field nano spectral electrochemical detection pool for plasma observation

Abstract

The invention relates to a nano spectral analysis and electrochemical analysis technique, and relates to a dark-field nano spectral electrochemical detection pool for plasma observation. The detection pool comprises a quartz glass plate, a circular electrode and a bearing plate which are all transparent structures, wherein a circular electrode fixing pool, a channel, a flowing injection port and an outflow port on the channel, a reference electrode fixing port, a counter electrode fixing port, a deoxygenization space, an inert gas feeding port, a gas extraction port and an electrode lead connection channel are arranged on the quartz glass plate; and the quartz glass plate and the bearing plate are formed into a sandwich layer, the circular electrode is fastened in the electrode fixing pool, and the quartz glass plate and the bearing plate are hermetically fixed by using screws. According to the invention, a light path is easy to calibrate, an operation of deoxygenization is convenient, and a working electrode is easy to install, remove and replace; and the detection pool has spatial discrimination and micro-area analysis capabilities, so that the detection pool can be used as a technique for carrying out observation and acquisition on resonance Rayleigh scattered spectrums of plasmas generated by single nanoparticles and generated by that single nanoparticles and molecules of an interface solution are interacted under the condition of electrochemical control.

Description

technical field [0001] The invention relates to the technical fields of nanometer spectral analysis and electrochemical analysis, in particular to the design and manufacture of a single particle plasma scattering spectroelectrochemical detection cell under dark field. Background technique [0002] In the field of nanospectral analysis and electrochemical analysis technology, the spectroelectrochemical detection method combines electrochemistry and spectroscopy. While recording electrochemical signals, in-situ collection at the electrode surface or near the liquid layer can reflect various species. and the instrumental analysis method of the spectral information of the quantity change. This method can observe the molecular optical information of reactants, intermediates and products in situ and in real time during the electrochemical reaction process, as well as the species changes in the chemical process, so as to obtain the kinetic and thermodynamic parameters of the electr...

AI Technical Summary

Problems solved by technology

At present, there are still many difficulties in the electrochemical detection of single particle plasma scattering spectrum under dark field, these difficulties mainly include: (1) The distance between the dark field illumination lens and the working electrode of the nanospectroelectrochemical detection cell must be less than 5mm, which is The thickness of the nanospectral detection cell is limited, which increases the difficulty of the design of the detection cell; (2) limited by the working distance of the objective lens, the surface of the working electrode and the surface of the stage must be less than 1.2mm; (3) in order to collect a single The scattering spectrum signal of nanoparticles must exclude the interference of stray light; (4) In order to eliminate the influence of solution diffusion on the working electrode on the effective regulation of the solution and electrode surface by electrochemical technology, the thickness of the solution layer above the working electrode needs to be controlled to be extremely thin (less than 300μm), and does not affect the flow update of the solution layer solution; (5) in the extremely thin electrode reaction space and in the μL level reaction solution to ensure the stability of the oxygen-sensitive solute in the solution and deoxygenate the solution, use It is unrealistic to fill the inert gas into the deoxygenation method

This largely limits the popularization and application of spectroelectrochemical detection technology in the field of interface process research.

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