Liquid transport laws at the micrometer and nanometer sizes were first investigated and altered by the microfluidic technology that emerged in the early 1990s. Microfluidic technology is becoming more and more popular in life science and medical research, and it has produced amazing outcomes.

We have created a microfluidic detection method based on aptamer functionalized gold nanoparticles, which eliminates the need for target labeling, the need to fix a capture probe on the detection surface, and the need for washing steps. We used the detection of cortisol in saliva as an example. Aptamer functionalized gold nanoparticles pre-integrated with electro-active triamcinolone serve as the technology's recognition mechanism.

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