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Electrochemical detection device for scanning the appearance of local area

A detection device and electrochemical technology, applied in the field of electrochemical testing, can solve the problems of difficult feedback current density signal, weak signal, single detection signal, etc.

Inactive Publication Date: 2014-09-24
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an electrochemical detection method for local area morphology scanning, which overcomes the shortcomings of conventional scanning electrochemical microscopes such as weak signals, difficulty in obtaining feedback current density signals, and single detection signals, and can Obtain the local microscopic impedance distribution characteristics of the sample surface, which is rich in information, which is conducive to the study and analysis of the real characteristics of the sample

Method used

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  • Electrochemical detection device for scanning the appearance of local area
  • Electrochemical detection device for scanning the appearance of local area
  • Electrochemical detection device for scanning the appearance of local area

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Embodiment 1

[0073] Such as figure 1 As shown, the electrochemical test device includes: (1) double potentiostat, (2) probe signal receiving device, (3) lock-in amplifier, (4) sample signal collector, (5) electrolytic cell leveling knob , (6) test probe, (7) sample fixing platform, (8) test sample, (9) reference electrode, (10) test electrolytic cell, (11) electrolytic cell upper cover, (12) counter electrode. Among them, (2) the probe signal receiving device also includes a three-dimensional stepping motor and a piezoelectric ceramic sensor, (6) the test probe can use a platinum disk electrode (Pt purity>99.9%) and a gold disk electrode (Au purity> 99.9%), (9) The reference electrode is an Ag / AgCl electrode. The equivalent circuit diagram of the test sample is shown in figure 2 As shown, the test probes were cleaned in acetone, alcohol, and ultrapure water in sequence for 30 minutes, then rinsed thoroughly with ultrapure water, and dried with nitrogen or argon. The sample to be tested...

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Abstract

The invention provides an electrochemical detection device for scanning the appearance of a local area. The electrochemical detection device comprises a bipotentiostat, a probe signal receiving device, a lock-in amplifier, a sample signal collector, an electrolyzer horizontal knob, a test probe, a sample fixing table, a reference electrode, a test electrolyzer, an electrolyzer upper cover, a counter electrode and a computer. The electrochemical detection device overcomes the defects of weak signals, difficulty in acquiring of feedback current density signals, and single detection signals of conventional scanning electrochemical microscopes, and can acquire local microcosmic impedance distribution characters of sample surfaces and abundant information, so that the device is beneficial for researching and analyzing the true character of s sample.

Description

technical field [0001] The invention relates to the technical field of electrochemical testing, in particular to an electrochemical detection device for local area topography scanning. Background technique [0002] There are many local and microscopic image scanning methods, such as atomic force microscope (AFM), scanning tunneling microscope (STM), profilometer, scanning electrochemical microscope (SECM) and so on. In response to the harsh requirements under special research conditions, researchers combined atomic force microscopy with scanning electrochemical microscopy, atomic force microscopy and infrared spectroscopy, etc. The combination of technical means has significantly expanded the application fields of these local scanning technologies. Among them, scanning electrochemical microscopy, which is mainly used in the field of electrochemistry, has become one of the necessary means to characterize the microscopic surface reactions and kinetic properties of substances a...

Claims

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Application Information

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IPC IPC(8): G01N27/02
Inventor 王巍许立坤隋永强李相波闫永贵
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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