Enhanced cold field emission from Š100‹ oriented b–W nanoemitters
نویسندگان
چکیده
Well-aligned b-phase W~100! nanorods having square-base pyramidal apexes were grown on oxidized Si~100! substrate using glancing angle deposition technique with substrate rotation. The field emission characteristics of nanorods were measured using scanning tunneling microscope ~STM! tip as an extraction anode. A highly confined emission current of about 23 mA was obtained at a low extraction voltage of ;260 V at ;280 nm anode-cathode distance with ,3% fluctuations over ;2 h. The Fowler–Nordheim plot of the field emission characteristics of nanorods is nonlinear compared with the linear behavior from a conventional W film. The STM topography after the field emission showed a type of nanolips structure grown over the pyramidal apex, which was suggested to enhance and stabilize the emission current. © 2004 American Vacuum Society. @DOI: 10.1116/1.1736642#
منابع مشابه
Carbon nanotube ield emitters
Application of various one-dimensional nanostructure materials as field emission sources has attracted extensive scientific efforts. Elongated structures are suitable for achieving high field-emission-current density at a low electric field because of their high aspect ratio. Area of its application includes a wide range of field-emission-based devices such as flat-panel displays, electron micr...
متن کاملExperimental Characterization of Anode Heating Due to Electron Field Emission
Recent advances in cold cathode field emitters have produced improvements in emission efficiency and thus enhanced the applicability of such devices. This article considers heating due to electron field emission from a polycrystalline diamond cathode. Temperature measurements from infrared thermography reveal highly localized heating due to nonuniform emission from the cathode. Power dissipatio...
متن کاملExcellent Field Emission Properties of Short Conical Carbon Nanotubes Prepared by Microwave Plasma Enhanced CVD Process
Randomly oriented short and low density conical carbon nanotubes (CNTs) were prepared on Si substrates by tubular microwave plasma enhanced chemical vapor deposition process at relatively low temperature (350–550 C) by judiciously controlling the microwave power and growth time in C2H2 + NH3 gas composition and Fe catalyst. Both length as well as density of the CNTs increased with increasing mi...
متن کاملFine Tuning the Emission Properties of Nanoemitters in Multilayered Structures by Deterministic Control of their Local Photonic Environment
Deterministic control on the dynamics of organic nanoemitters is achieved through precise control of its photonic environment. Resonators are fabricated by a combination of spin- and dip-coating techniques, which allows placement of the emitters at different positions within the sample, thus acting as a probe of the local density of states.
متن کاملField emission enhancement by the quantum structure in an ultrathin multilayer planar cold cathode
multilayer planar cold cathode R. Z. Wang, H. Yan, B. Wang, X. W. Zhang, and X. Y. Hou Laboratory of Thin Film Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, People’s Republic of China Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, People’s Repu...
متن کامل