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Nanofluidic Transport through Isolated Carbon Nanotube Channels: Advances, Controversies, and Challenges
Author(s) -
Guo Shirui,
Meshot Eric R.,
Kuykendall Tevye,
Cabrini Stefano,
Fornasiero Francesco
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201500372
Subject(s) - nanotechnology , carbon nanotube , fluidics , materials science , nanofluidics , microfluidics , nanolithography , nanoelectronics , electronics , fabrication , engineering , electrical engineering , medicine , alternative medicine , pathology
Owing to their simple chemistry and structure, controllable geometry, and a plethora of unusual yet exciting transport properties, carbon nanotubes (CNTs) have emerged as exceptional channels for fundamental nanofluidic studies, as well as building blocks for future fluidic devices that can outperform current technology in many applications. Leveraging the unique fluidic properties of CNTs in advanced systems requires a full understanding of their physical origin. Recent advancements in nanofabrication technology enable nanofluidic devices to be built with a single, nanometer‐wide CNT as a fluidic pathway. These novel platforms with isolated CNT nanochannels offer distinct advantages for establishing quantitative structure–transport correlations in comparison with membranes containing many CNT pores. In addition, they are promising components for single‐molecule sensors as well as for building nanotube‐based circuits wherein fluidics and electronics can be coupled. With such advanced device architecture, molecular and ionic transport can be manipulated with vastly enhanced control for applications in sensing, separation, detection, and therapeutic delivery. Recent achievements in fabricating isolated‐CNT nanofluidic platforms are highlighted, along with the most‐significant findings each platform enables for water, ion, and molecular transport. The implications of these findings and remaining open questions on the exceptional fluidic properties of CNTs are also discussed.