Preparation method of highly sensitive photoelectrochemical sensor for detecting microRNA
A photoelectrochemical and sensitive detection technology is applied in the field of photoelectrochemical sensor preparation, which can solve the problems of time-consuming, complex and expensive instruments, and achieve the effects of enhancing sensitivity, accurate detection, and improving analysis and detection signals.
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[0030] Example 1: Application of ultrasensitive photoelectrochemical sensors in the detection of microRNA-141
[0031] (1) Use Adobe illustrator CS4 software on the computer to design the hydrophobic wax printing pattern of the microfluidic paper chip, print the designed printing pattern on the chromatographic paper through the wax printer, and then put the printed chromatographic paper in the oven, Heat at 130°C for 50 seconds to melt the wax and penetrate the entire thickness of the chromatography paper, forming a hydrophobic area and a hydrophilic working area;
[0032] (2) Design the printing patterns of the working electrode, counter electrode and reference electrode that match the wax printing pattern obtained in step (1) on the computer, and use screen printing technology to print the wax on the wax obtained in step (1). Printed carbon working electrode, carbon counter electrode and Ag / AgCl reference electrode on chromatographic paper;
[0033] (3) Using the in situ gr...
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