Sensor based on micro-fluidic chip and preparation method of sensor

Abstract

The invention discloses a sensor based on a micro-fluidic chip. The sensor based on the micro-fluidic chip comprises an upper chip and a lower chip, wherein the upper chip and the lower chip are laminated by a double-layer force adhesive film; a micro groove is formed in the upper chip and is used for placing a PVDF (Polyvinylidene Fluoride) isolating membrane; a micro channel is formed in the upper chip and is used for placing a counter electrode and a reference electrode; the lower chip is composed of holes and micro channels; and the holes comprise a sample reserve hole, a waste liquor hole, a cleaning fluid hole, a liquid outlet hole and the rest of open micro channels. The system can overcome the defects that the traditional electrochemical transducer is complicated in component, large in electrolyte demands, poor in repeatability, short in service life, narrow in application field and the like, is capable of qualitatively and quantitatively perform small-molecule electrochemicaldetection, and has wide application prospects. The sensor system based on the micro-fluidic chip has the characteristics of being simple in operation, wide in application range, high in accuracy, integrated in multifunctional units on the chip, portable in system, automatic in operation and the like.

Description

technical field [0001] The invention relates to the field of chips, in particular to a sensor and a preparation method based on a microfluidic chip. Background technique [0002] With the process of industrialization, the on-line and rapid detection of toxic and harmful gases, solids and heavy metal (ion) pollution is imminent, and people are eager to have a portable detection instrument that can continuously, quickly and on-line monitor pollutants. In recent years, as a new type of analysis platform, microfluidic chips have the advantages of miniaturization, automation, integration, convenience and speed, and have been widely used in many fields, such as cell biology, analytical chemistry, materials science, fields such as tissue engineering and microelectronics. However, the use of electrochemical sensor systems based on microfluidic chips to obtain the types and concentrations of detected molecules through electrochemical oxidation / reduction characteristics has not yet h...