Field ionization detection of helium using a planar array of carbon nanotubes
MetadataShow full item record
In this work we demonstrate the field ionization of neutral helium using a carbon nanotube forest in a parallel-plate detector geometry. The nanotube forest was grown using plasma-enhanced chemical vapor deposition on a silicon substrate. With a high positive voltage applied to the nanotubes, the measured ion current was directly correlated with the helium partial pressure. Moreover, we show that multiple nanotubes act as field ionisation sources suggesting that, with careful nanotube engineering, significantly larger numbers of nanotubes should be able to contribute to the measured current, paving the way for high-efficiency, spatially resolved field ionization detection.
Showing items related by title, author, creator and subject.
Hughes, Zak; Shearer, C.; Shapter, J.; Gale, Julian (2012)Carbon nanotubes have attracted interest as possible membranes for desalination based on the observation of fast diffusion of water in simulations of long or infinitely periodic systems. When carbon nanotubes are finite ...
Wang, J.; Zhou, Y.; Xiong, B.; Zhao, Y.; Huang, X.; Shao, Zongping (2013)Though there have been remarkable growth and widespread application of Li-ion batteries in portableelectronics, it is highly desirable to develop the electrode materials with superior performance to meetthe challenges of ...
Highly resilient field emission from aligned single-walled carbon nanotube arrays chemically attached to n-type siliconShearer, C.; Yu, J.; O’Donnell, Kane; Thomsen, L.; Dastoor, P.; Quinton, J.; Shapter, J. (2008)Single-walled carbon nanotubes (SWNTs) were chemically attached to an n-type silicon (100) substrate (n-Si) by exposing the surface to a nanotube-containing suspension for attachment times varying from 2 to 72 h. The SWNTs ...