Highly efficient low voltage electron emission from directly spinnable carbon nanotube webs
Source abstract
Abstract
Two methods for increasing the number of free carbon nanotube (CNT) tips in carbon nanotube webs (CNTW) and improving their field emission (FE) performance are proposed. It was observed that by laterally compressing samples by 35 percent it is possible to improve FE performance to some extent, with further compression leading to a loss of FE properties due to folding of webs and adhesion between CNT tips. Multilayered samples were also studied and it was found that samples with successive layers in which the orientation of the nanofibers in successive layers was the same, increased inter-bundle van der Waals forces, leading to more compact webs with no improvement in FE performance. However, it was found that if the fibers in successive layers were perpendicular to each other the inter-bundle attraction was minimized, maximizing the number of active CNT tips and yielding materials that exhibit the best FE performance reported for any material to date.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Carbon Nanotubes in Composites · Graphene research and applications · Mechanical and Optical Resonators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (23)
Show source-provided references
1. Field-emission behavior of a carbon-nanotube-implanted Co nanocomposite fabricated from pearl-necklace-structured carbon nanotube/Co powders10.1002/adma.200501267 ↗
2. Carrier transport and electron field-emission properties of a nonaligned carbon nanotube thick film mixed with conductive epoxy10.1063/1.1287113 ↗
3. Fusion of carbon nanotubes for fabrication of field emission cathodes10.1016/j.carbon.2011.07.058 ↗
4. Enhancement of field emission of carbon nanotubes using a simple microwave plasma method10.1016/j.carbon.2010.09.045 ↗
5. Electron field emission properties of conducting polymer coated multi walled carbon nanotubes10.1016/j.apsusc.2008.04.094 ↗
6. High performance bulk metallic glass/carbon nanotube composite cathodes for electron field emission10.1063/1.3659898 ↗
7. Electron field emission from transparent multiwalled carbon nanotube sheets for inverted field emission displays10.1016/j.carbon.2009.08.009 ↗
8. Field emission properties from the tip and side of multi-walled carbon nanotube yarns10.1016/j.carbon.2010.07.006 ↗
9. Carbon-nanotube–polymer nanocomposites for field-emission cathodes10.1002/smll.200801094 ↗
10. Field emission from graphene based composite thin films10.1063/1.3028339 ↗
11. Field emission from vertically aligned few-layer graphene10.1063/1.2999636 ↗
12. Electron field emission from screen-printed graphene films10.1088/0957-4484/20/42/425702 ↗
13. Field emission study of graphene nanowalls prepared by microwave-plasma method10.1016/j.carbon.2011.03.004 ↗
14. Strong, transparent, multifunctional, carbon nanotube sheets10.1126/science.1115311 ↗
15. Understanding the synthesis of directly spinnable carbon nanotube forests10.1016/j.carbon.2009.11.032 ↗
16. Evolution of directly-spinnable carbon nanotube growth by recycling analysis10.1016/j.carbon.2011.01.024 ↗
17. Multifunctional carbon nanotube yarns and transparent sheets: fabrication, properties, and applications10.1016/j.physb.2006.12.061 ↗
18. Stability of carbon nanotubes under electric field studied by scanning electron microscopy10.1063/1.1429300 ↗
19. Carbon nanotubes as field emission sources10.1039/b314155c ↗
20. Hojati-Talemi P, Hawkins S, Huynh C, Simon GP. Understanding parameters affecting field emission properties of directly spinnable carbon nanotube webs. Carbon, submitted for publication.
21. Carbon nanotube actuators10.1126/science.284.5418.1340 ↗
22. Torsional carbon nanotube artificial muscles10.1126/science.1211220 ↗
23. Underwater sound generation using carbon nanotube projectors10.1021/nl100235n ↗