Preparation method for Pt disk sub-micron electrode with controllable geometrical shape
A geometric shape and sub-micron technology, which is applied in the field of preparation of geometrically controllable Pt disk sub-micron electrodes, can solve the problems of poor controllability of micro-nano electrode tip morphology and geometric shape, increase of human factors, and inclination, etc. Achieve the effect of improving spatial resolution and dynamic detection limit, improving sensitivity, and sealing tightly
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[0035] The present invention will be further described below with reference to the accompanying drawings and specific examples.
[0036] The preparation method of the Pt disc submicron electrode of this example, its basic steps include:
[0037] a. Take the annealed Pt wire with a length of 1.5 cm and a diameter of 25 microns, and gently roll and straighten it by hand;
[0038] b. Take a boric acid capillary glass tube with an outer diameter of 1 mm, an inner diameter of 0.2 mm and a length of 10 cm. 2 SO 4 with H 2 O 2 The solution was soaked and cleaned with a volume ratio of 3:1 for 30 minutes, washed with deionized water for 3 times, and dried in an oven for use;
[0039] c. Place the Pt wire in step a in the capillary glass tube in step b, and make the Pt wire in the middle of the capillary;
[0040]d. Seal one end of the capillary glass tube in step c with Parafilm, place it in the center of the Laser Puller P-2000 laser pulling instrument, and connect the other end...
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