Emerging Two-dimensional Materials Constructed Nanofluidic Fiber: Properties, Preparation and Applications

By virtue of ultra-flexibility and non-inductive feature, fibrous electrode is an ideal platform for constructing wearable electronics and implantable electrodes for medical therapy. 2D nanofluidic channels with tailored ion transport dynamics enable minimized charge transfer resistance and efficient ion transport capability. Thus, combining the nanofluidic ion transport features and fibrous electrode advantages, 2D nanofluidic fiber electrode presents a series of extra advantages of unidirectional efficient ion transport and great biofriendliness. In this minireview, we first elaborate the architecture characteristics of the emerging 2D nanofluidic fibers and highlight the intriguing features, such as tunable interlayer spacing, efficient ion transport and modifiable channel surface. Conventional strategies for constructing 2D nanofluidic fibers have been systematically enumerated, including solvent volatilizing regulation, confinement triggered alignment, and flow-driven orientation. In addition, the promising applications of 2D nanofluidic fibers have been also summarized as well. Finally, we analyze the challenges and perspectives of fibrous 2D nanofluidic construction, ion transport mechanism study and potential application extension.