An Integrated Nanoliter DNA Analysis Device

TLDR

The device integrates microfabricated fluidic channels, heaters, temperature sensors, and fluorescence detectors to mix, amplify or digest, separate, and detect nanoliter DNA samples in a closed, photolithographically fabricated system. The integrated system operates without external lenses, heaters, or pumps, enabling low‑cost, low‑power portable DNA analysis that could support rapid medical diagnostics and point‑of‑use agricultural testing.

Abstract

A device was developed that uses microfabricated fluidic channels, heaters, temperature sensors, and fluorescence detectors to analyze nanoliter-size DNA samples. The device is capable of measuring aqueous reagent and DNA-containing solutions, mixing the solutions together, amplifying or digesting the DNA to form discrete products, and separating and detecting those products. No external lenses, heaters, or mechanical pumps are necessary for complete sample processing and analysis. Because all of the components are made using conventional photolithographic production techniques, they operate as a single closed system. The components have the potential for assembly into complex, low-power, integrated analysis systems at low unit cost. The availability of portable, reliable instruments may facilitate the use of DNA analysis in applications such as rapid medical diagnostics and point-of-use agricultural testing.