Fig 1

Directly spun carbon nanotube film from vertical array of carbon nanotubes (VACNT). (a) optical image of carbon nanotube film from the VACNT 56; (b) Scanning electron microscopy (SEM) image of carbon nanotube film from the VACNT 54; (c) Schematic illustration of making superaligned cross-stack films and a transmission electron microscopy (TEM) image 56; (d) SEM micrograph of a two-dimensionally reinforced structure fabricated by overlaying four carbon nanotube sheets 54"

Fig 2

CNT film directly prepared through FCCVD (floating catalytic chemical vapor deposition method). (a) A free-standing CNT film directly prepared through FCCVD and (b, c) its SEM image showing the alignment of CNT bundles 57; (d) Schematic showing the apparatus designed for the synthesis, deposition, and transfer of CNT films 58; (e) A CNT thin film transferred on a flexible PET (polyethylene terephthalate) substrate with a length of more than 2 m 58."

Fig 3

Vacuum filtration and electrodeposition method for preparing CNT film. (a) Preparation and Characterization of CNT film by vacuum filtration 61; (b) Schematic illustration of the electric-field-enhanced chemical assembly of single-walled carbon nanotubes on a gold surface 64."

Fig 4

Preparation and Characterization of CNT film by self-assembly method. (a) Optical micrograph and (b) SEM image showing the large scale alignment of the nanotube superlattice 66; (c) SEM image of CNTs deposited on an open HfO2 area 68; (d) Schematic illustration of the Langmuir-Schaefer assembly process 69; (e) Preparation and Characterization of CNT film by a novel "dose-controlled, floating evaporative self-assembly" process 70."

Fig 5

Preparation and Characterization of CNT film by spray-coating 80. (a) A schematic depicting the fabrication process for the spray-coated CNT films; (b) Optical image and SEM image of spray-coated thin CNT films from a surfactant-free carbon nanotube ink."

Fig 6

Application of CNT films in various flexible sensors. (a) Fabrication process of CNT film-based strain sensors and (b) flexible strain sensor attached to human knee joint for detecting the motions 91; (c) Schematic diagram of the pressure sensors based on porous PDMS (polydimethylsiloxane) and SWNT (single-walled carbon nanotube) films and (d) the sensors for distinguishing pressure 95; (e) Schematic illustration of the flexible pressure sensors made of CNT/graphene hybrid films and microstructured PDMS substrates 97; (f) Schematic diagram and photograph of an artificial afferent nerve system 96; (g) Fabrication and performance of CNT-based humidity sensor 105."

Fig 7

CNT films based various flexible energy device. (a) SEM image of as-deposited SWCNT networks and (b) Thin film supercapacitor using sprayed SWNT films on PET as electrodes 109; (c) Direct lithiation (DP) process of CNT film and schematic drawing of the principle of DP 117; (d) Structure and working principle of the triboelectric and piezoelectric hybrid nanogenerator 120. (e) Photographs and performance of compact-designed thermoelectric modules 123."

Fig 8

Other flexible electronic devices based on CNT films. (a) Schematic illustration of the process to embed CNT ribbons in PDMS and optical images of a CNT/PDMS film on a labeled paper and a folded CNT/PDMS film 124; (b) Touch panels based on CNT films 126; (c) Stretchable SWNT TFTs for circuits 138; (d) Schematic of photodetector based on asymmetrically contacted CNT thin film diode 139; (e) Fermi-level-controlled flexible and bendable CNT films based terahertz (THz) imagers 141."