Abstract
Atomically thin WS2 nano-petals and nano-bristles were synthesized on vertically aligned carbon nanotubes (CNT) via magnetron sputtering at room temperature. The formation of the nano-petal morphology requires reaching a critical threshold in sputter deposition time, below which an amorphous film of WO3 is obtained instead. Increasing the deposition time past a second threshold results in a change to the nano-bristle morphology. Both WS2 nano-petals and nano-bristles were able to significantly enhance the electron emission of properties. The lowest turn-on voltage measured was to be 295 V and 355 V for the nano-petals and nano-bristles respectively, versus 425 V for pristine CNTs. The variation in the turn-on voltage is due to the electrical contacts at the interface between the different WS2 structures, which induces current saturation at high emission currents. These results demonstrate that 2D WS2 layers can be synthesized without the need for chemical routes and high growth temperatures if an appropriate template is employed.
Highlights
Since the discovery of graphene, layered inorganic analogues of the material have gained significant attention from the scientific community due to their interesting properties and wide potential applications in various nanoelectronic devices
As the deposition time is increased, the particulate film thickens until sharp flakes begin to emerge from the surface at a sputter time of 30 min (Fig. 1(e))
Thin sheets of material can be seen extending outward from the sidewalls of the encapsulated carbon nanotubes (CNT), similar to the results obtained from scanning electron microscope (SEM)
Summary
Since the discovery of graphene, layered inorganic analogues of the material have gained significant attention from the scientific community due to their interesting properties and wide potential applications in various nanoelectronic devices. The SEM images of the samples are depicted, in which we observe the emergence of a film of angular particulates encapsulating the CNTs after 10 min sputter deposition of WS2.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
