The present invention relates to an inexpensive
cholera diagnosis microfluidic apparatus with a tortuous liquid flow transmission
route, and belongs to the field of
analytical testing. According to the present invention, the use of inexpensive and easily-processed
polydimethylsiloxane (PDMS) to produce the substrate of a
microfluidic chip for
cholera diagnosis has a series of problems that the surface of the PDMS is strongly hydrophobic and the
surface chemical modification effect is difficult to last. The technical scheme of the present invention is that the substrate material is PDMS with an original ecological surface, the pipeline of the
chip is filled with doped micron-scale
titanium dioxide particles, the surface super-hydrophilicity of the
titanium dioxide particles can be induced by
visible light irradiation in advance, and the set of the
titanium dioxide particle filler and the super-hydrophilic gap between the particles can compensate and beyond the original strong hydrophobic pipeline, such that the constant and super hydrophilic modification effect is achieved. In addition, the
titanium dioxide filler can further be used for preventing the pipeline of the
chip from collapsing and deforming, and blocking biological macromolecules from contacting the inner wall of the pipeline.