Nanofluidics has garnered significant attention due to the designability and unique transport features at the nanoscale. With the development of nanofabrication, nanofluidic devices are systematically developed for ultrasensitive molecular recognition and physical perception, paving the way for intelligent recognition applications in the fields of bioscience, food safety, medical diagnostics, and so on.

Abstract

Nanofluidics has garnered significant attention as the ultra-sensitive method for molecular recognition and physical perception that are not easily accessible through the traditional methods. The development of nanofluidic devices necessitates the integrated solid-state nanochannels/nanopores with versatile surface modification strategies using precise nanofabrication techniques. This review systematically summarizes the development of the solid-state nanochannels and nanopores, nanofabrication methods, sensing principles, transport characteristics, and the strategies employed to perceive molecules and physical stimuli. The discussion also emphasizes promising research directions and explores how the interaction between interface chemistry influenced by molecular recognition and physical stimuli, in conjunction with the exceptional ion transport properties of nanofluidic devices, significantly impacts the sensing performance of the nanofluidics. Lastly, we present the vision for the future prospects of biomimetic nanofluidic devices in ionic sensing applications.