Super-elasticity particle shear modulus detecting device and method based on nano-holes

Abstract

The invention discloses a super-elasticity particle shear modulus detecting device and method based on nano-holes. The detecting device mainly comprises two micro-cavities of a silicon substrate, nano-holes for connecting the micro-cavities and a current detecting loop. During detection, particles penetrate through the nano-holes under the effect of a static electric field. Meanwhile, weak currentvariation when the particles penetrate through the nano-holes is measured by the current detecting loop, and then, the shear modulus of particles is analyzed by data.

Description

technical field [0001] The invention belongs to the technical field of detecting particles by using nanopores, and in particular relates to a detection device and method for shear modulus of superelastic particles based on nanopores. Background technique [0002] The detection of water pollution, especially the detection of marine pollution, is the direction of human continuous research. At present, the detection of micro-nano particles in the water quality environment is a practical problem that needs to be solved urgently. The types of water environmental scientific analysis objects are complex and different in nature, so the analysis methods must be accurate, fast, efficient, sensitive, and automated. [0003] With the needs of life and work, small, portable, automatic and continuous, simple and fast detection methods are a development trend, and the detection technology based on nanopores is the most representative one. In recent years, nanopore-based detection technol...

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Problems solved by technology

[0004] The commonly used solid-state nanopores also have the following problems: First, the channel length of solid-state nanopores is usually more than 5nm, which is relatively large for most micro-nano particles, resulting in insignificant changes in the ion current of particles passing through the nanopores

Secondly, in the nanopore-based detection method, the speed of particles passing through the nanopore is generally fast, resulting in a low detection and recognition rate. These problems seriously restrict the practical application of this detection method.

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