Helium Detection via Field Ionization from Carbon Nanotubes
Nano Letters2003Vol. 3(10), pp. 1455–1458
Citations Over TimeTop 11% of 2003 papers
D. Riley, Mark Mann, Donald A. MacLaren, Paul C. Dastoor, W. Allison, Kenneth B. K. Teo, G.A.J. Amaratunga, W. I. Milne
Abstract
A novel, high-efficiency detector for neutral atoms such as helium is described. The design uses multiwalled carbon nanotubes (MWNTs), grown by chemical vapor deposition on a steel support wire. Application of a positive bias to the MWNTs generates electric fields sufficient to field-ionize passing gas-phase atoms. Under ultrahigh vacuum conditions, the detector was demonstrated to be capable of ionising and detecting even helium gas, the element with the highest ionization potential.
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