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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Johnson, S. Zulicke, U. Blaikie, R.J. Markwitz, A. |
| Copyright Year | 2006 |
| Description | Author affiliation: Nat. Isotope Centre, GNS Sci. (Johnson, S.) |
| Abstract | Summary form only given. Conventional Fowler-Nordheim theory of field electron emission describes the emission process as electron tunnelling from a Fermi sea through a surface potential barrier modified by an external electric field. However, a number of recent studies of field emission from nanometre-scale metallic systems reveal significant departures from this traditional description. In particular, the energy spectrum of electrons field-emitted from Au nanoclusters and W nanotips was found to consist solely of multiple peaks spread over a range of energies around the Fermi level. The existence of these peaks suggests that electrons do not tunnel directly from the bulk Fermi sea into vacuum; rather that tunnelling occurs through discrete energy levels formed in the nanotips due to spatial confinement. In this paper we report the field emission properties of self-assembled silicon nanostructures formed on an n-type silicon (100) substrate by electron beam annealing at 1000 degC for 15 s. The nanostructures are square based, with an average height of 8 nm and are distributed randomly over the entire substrate surface. Following a period of conditioning, the silicon nanostructure field emission characteristics become stable and reproducible with electron emission occurring for fields as low as 3 $Vmum^{-1}.$ With continued conditioning however, a number of discrete and highly repeatable current peaks develop which are superimposed on a background current well described by conventional Fowler-Nordheim theory. These current peaks are understood to result from enhanced tunnelling through resonant states formed at both the substrate-nanostructure and nanostructure-vacuum interface. Here will provide details of the experimental procedure and the corresponding experimental observations along with a theoretical model to account for the observed I-V characteristics |
| Starting Page | 299 |
| Ending Page | 299 |
| File Size | 148779 |
| Page Count | 1 |
| File Format | |
| ISBN | 1424404010 |
| DOI | 10.1109/IVNC.2006.335477 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2006-07-17 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Resonance Silicon Electron emission Tunneling Nanostructures Sea surface Gold Elementary particle vacuum Energy states Self-assembly |
| Content Type | Text |
| Resource Type | Article |
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