Monomolecular layer fluorescent sensing thin film-based sensor array and mode identification thereof on harmful gas

Abstract

The invention discloses monomolecular layer fluorescent sensing thin film-based sensor array and a mode identification thereof on harmful gas. The sensor array comprises microarray monomolecular layerfluorescent sensing thin films, and each sensing thin film is formed by generating absorption of ion liquids of two amphiphilic boron-dipyrromethene derivative or PEG 200 solution at a hydrophilic microregion with a hydrophilic and hydrophobic microregion gold substrate and automatically assembling the two amphiphilic boron-dipyrromethene derivatives at a gas-liquid interface. A fluorescent response signal of each sensing thin film on the harmful gas in a sensor array is acquired, the obtained multi-dimensional fluorescent signal is processed, so that mode identification of the harmful gas such as volatile organic compound, nerve gas and an explosive substance is achieved. The sensor array is low in cost, the microarray monolecular layer fluorescent sensing thin film has the advantages ofgood stability, long service lifetime and high detection sensitivity, the detection method is simple, is easy to operate and is wide in application.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection, and in particular relates to a sensor array based on a monomolecular layer fluorescent sensing film and a method for detecting and identifying various toxic gases by using the array. Background technique [0002] In recent years, terrorism and environmental pollution have seriously threatened people's lives and production safety. Nerve gas, a type of organophosphorus compound, was first synthesized in 1854 and has developed into a widely used chemical warfare weapon over the past eight decades. Skin absorption in a short period of time can paralyze muscles, and in severe cases can cause death by suffocation. In addition, with the general improvement of human production and living standards, environmental pollution has increasingly become a factor that endangers human health. Volatile organic compounds are common chemical substances widely present in the air, which mainly ...

AI Technical Summary

Problems solved by technology

[0003] At present, the methods used to detect different toxic gases at home and abroad mainly include semiconductor electronic sensors, gas chromatography, resistance sensors, surface acoustic wave sensors, etc. These methods can realize the detection of different toxic gases, but they have some shortcomings, such as Complicated operation, long time and high cost

At the same time, a single sensor requires high sensor selectivity, which greatly limits the application range of the sensor.

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