Nanoscale structuring of tungsten tip yields most coherent electron point-source
This report demonstrates the most spatially-coherent electron source ever reported. A coherence angle of 14.3 ± 0.5° was measured, indicating a virtual source size of 1.7 ± 0.6 Å using an extraction voltage of 89.5 V. The nanotips under study were crafted using a spatially-confined, field-assisted n...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
|
| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/7/073038 |
| _version_ | 1797751445259288576 |
|---|---|
| author | Josh Y Mutus Lucian Livadaru Radovan Urban Jason Pitters A Peter Legg Mark H Salomons Martin Cloutier Robert A Wolkow |
| author_facet | Josh Y Mutus Lucian Livadaru Radovan Urban Jason Pitters A Peter Legg Mark H Salomons Martin Cloutier Robert A Wolkow |
| author_sort | Josh Y Mutus |
| collection | DOAJ |
| description | This report demonstrates the most spatially-coherent electron source ever reported. A coherence angle of 14.3 ± 0.5° was measured, indicating a virtual source size of 1.7 ± 0.6 Å using an extraction voltage of 89.5 V. The nanotips under study were crafted using a spatially-confined, field-assisted nitrogen etch which removes material from the periphery of the tip apex resulting in a sharp, tungsten–nitride stabilized, high-aspect ratio source. The coherence properties are deduced from holographic measurements in a low-energy electron point source microscope with a carbon nanotube bundle as sample. Using the virtual source size and emission current the brightness normalized to 100 kV is found to be 7.9 × 10 ^8 A sr ^−1 cm ^2 . |
| first_indexed | 2024-03-12T16:48:39Z |
| format | Article |
| id | doaj.art-78c0d1071ff94fb9a8b65c233b272801 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:48:39Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-78c0d1071ff94fb9a8b65c233b2728012023-08-08T11:26:23ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115707303810.1088/1367-2630/15/7/073038Nanoscale structuring of tungsten tip yields most coherent electron point-sourceJosh Y Mutus0Lucian Livadaru1Radovan Urban2Jason Pitters3A Peter Legg4Mark H Salomons5Martin Cloutier6Robert A Wolkow7Department of Physics, University of Alberta , 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; National Institute for Nanotechnology , National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, CanadaDepartment of Physics, University of Alberta , 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; National Institute for Nanotechnology , National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, CanadaDepartment of Physics, University of Alberta , 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; National Institute for Nanotechnology , National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, CanadaDepartment of Physics, University of Alberta , 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; National Institute for Nanotechnology , National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, CanadaDepartment of Physics, University of Alberta , 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; National Institute for Nanotechnology , National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, CanadaDepartment of Physics, University of Alberta , 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; National Institute for Nanotechnology , National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, CanadaDepartment of Physics, University of Alberta , 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; National Institute for Nanotechnology , National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, CanadaDepartment of Physics, University of Alberta , 11322-89 Avenue, Edmonton, Alberta T6G 2G7, Canada; National Institute for Nanotechnology , National Research Council of Canada, 11421 Saskatchewan Drive, Edmonton, Alberta T6G 2M9, CanadaThis report demonstrates the most spatially-coherent electron source ever reported. A coherence angle of 14.3 ± 0.5° was measured, indicating a virtual source size of 1.7 ± 0.6 Å using an extraction voltage of 89.5 V. The nanotips under study were crafted using a spatially-confined, field-assisted nitrogen etch which removes material from the periphery of the tip apex resulting in a sharp, tungsten–nitride stabilized, high-aspect ratio source. The coherence properties are deduced from holographic measurements in a low-energy electron point source microscope with a carbon nanotube bundle as sample. Using the virtual source size and emission current the brightness normalized to 100 kV is found to be 7.9 × 10 ^8 A sr ^−1 cm ^2 .https://doi.org/10.1088/1367-2630/15/7/073038 |
| spellingShingle | Josh Y Mutus Lucian Livadaru Radovan Urban Jason Pitters A Peter Legg Mark H Salomons Martin Cloutier Robert A Wolkow Nanoscale structuring of tungsten tip yields most coherent electron point-source New Journal of Physics |
| title | Nanoscale structuring of tungsten tip yields most coherent electron point-source |
| title_full | Nanoscale structuring of tungsten tip yields most coherent electron point-source |
| title_fullStr | Nanoscale structuring of tungsten tip yields most coherent electron point-source |
| title_full_unstemmed | Nanoscale structuring of tungsten tip yields most coherent electron point-source |
| title_short | Nanoscale structuring of tungsten tip yields most coherent electron point-source |
| title_sort | nanoscale structuring of tungsten tip yields most coherent electron point source |
| url | https://doi.org/10.1088/1367-2630/15/7/073038 |
| work_keys_str_mv | AT joshymutus nanoscalestructuringoftungstentipyieldsmostcoherentelectronpointsource AT lucianlivadaru nanoscalestructuringoftungstentipyieldsmostcoherentelectronpointsource AT radovanurban nanoscalestructuringoftungstentipyieldsmostcoherentelectronpointsource AT jasonpitters nanoscalestructuringoftungstentipyieldsmostcoherentelectronpointsource AT apeterlegg nanoscalestructuringoftungstentipyieldsmostcoherentelectronpointsource AT markhsalomons nanoscalestructuringoftungstentipyieldsmostcoherentelectronpointsource AT martincloutier nanoscalestructuringoftungstentipyieldsmostcoherentelectronpointsource AT robertawolkow nanoscalestructuringoftungstentipyieldsmostcoherentelectronpointsource |