Attenuated total reflection microfluidic prism for detecting trace liquid terahertz spectrum and manufacturing method

Abstract

The invention relates to an attenuated total reflection microfluidic prism for detecting micro fluid terahertz wave spectrum and a manufacturing method thereof, and belongs to the technical field of liquid phase sample terahertz wave spectrum detection. The attenuated total reflection microfluidic prism comprises an attenuated total reflection prism main body and a cover plate, wherein the attenuated total reflection prism main body is in a triangular prism shape; in three cylindrical surfaces, one rectangular surface is a total reflection surface; the rest two rectangular surfaces are terahertz wave coupling surfaces; the cover plate is arranged on the total reflection surface; a micro-channel structure is arranged on the surface of the cover plate; a through hole is also formed for communicating with the micro-channel structure; the through hole is used for liquid sample feeding or sample outlet; the cover plate is tightly attached to the total reflection surface. The detection sample quantity of the traditional attenuated total reflection mode is reduced to be dozens of microliters; the attenuated total reflection microfluidic prism is very suitable for the detection of valuablesamples and rare samples; meanwhile, tested liquid is sealed through microflow, so that the attenuated total reflection microfluidic prism is very suitable for the detection of volatile samples and toxic and harmful samples.

Description

technical field [0001] The invention belongs to the technical field of liquid phase sample terahertz spectrum detection, and relates to an attenuated total reflection microfluidic prism for detecting trace liquid terahertz spectrum and a manufacturing method thereof. Background technique [0002] Terahertz spectroscopy has been widely used in various biochemical detection fields. Attenuated total reflection is an effective method for liquid sample terahertz detection. Attenuated total reflection is to measure the interaction information between the evanescent wave on the surface of the total reflection prism and the sample, resulting in a spectrum similar to the transmission absorption. The evanescent wave propagates tangentially along the interface and decays exponentially in amplitude with increasing distance from the outer surface of the crystal. In the terahertz band, the evanescent wave can interact with the liquid tens to hundreds of microns above the total reflectio...

AI Technical Summary

Problems solved by technology

The amount of detection is expensive for rare samples and expensive samples

In addition, the liquid bearing pool of the general attenuated total reflection prism is an open structure, which is not conducive to the detection of volatile samples, toxic and harmful samples

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