Fig. 1: The single CNT nanofluidic device and measurement setup.
From: Enhanced osmotic transport in individual double-walled carbon nanotube
a The focus ion beam (FIB) precise etching technology removes the exposed parts of the CNT and opens both ends of CNT underneath the epoxy wall, which connects the two microchannels. In the schematic, silicon is black, silicon oxide is purple, SU-8 photoresist is brown. Carbon nanotube is a black rolled net. The enlarged inset shows the details of the opened CNT. b The PDMS is bonded on the SU-8 microchannels after being immersed in an aqueous solution of ATPES. Then the liquid inlet and outlet pipes, as well as the Ag/AgCl electrode, are assembled. In the schematic, PDMS is glassy transparent gray. c Scanning electron microscope (SEM) image showing the CNT passing through the SU-8 photoresist wall. The position of the single CNT is indicated by the red arrow in the figure. d Schematic diagram of the measurement principle for the individual carbon nanotube nanofluidic chip. The red and blue spheres represent cations and anions, respectively.
