Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Field emitters"”.
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Field emitters with integrated focusing electrode
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 1999.
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Parallel Plasma Field Directed Sputter Sharpening of Field Emitters
Many of the current methods to sharpen field emitters are time consuming and can only process one field emitter at a time. In this thesis, a method is proposed to parallel process multiple field emitters using a DC glow discharge plasma as the ion source in conjunction with field directed sputter …
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Individual Carbon Nanotube Probes And Field Emitters Fabrication And T
… on a sharpened clean tungsten wire for field emission (FE) experimentation. Another promising application for individual CNT tips is as AFM probes. The high aspect ratio and mechanical resilience make individual CNTs ideal for scanning probe microscopy (SPM) tips. Atomic force microscopy …
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Micromachining and modeling of focused field emitters for flat panel displays
We present a comprehensive study of field emitter arrays with or without an integrated focus electrode. The former configuration is referred to as field emitter with integrated focus (IFE-FEA) or double-gate FEA (DG-FEA). The main application of IFE-FEA is to improve the resolution of field …
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Development of optical field emitter arrays
Optical field emitters are electron emission sources actuated by incident light. Optically actuated field emitters may produce ultrafast pulses of electrons when excited by ultrafast optical pulses, thus making them of interest for specific applications such as ultrafast electron microscopy, …
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Study of Breakdown/arcing for High Power RF Antennas on Fusion Applications
… reveal the mechanism by which chemicals modify field emitters on high voltage electrodes a different system with ultra high vacuum, and in-situ diagnostics is required. Further study is recommended.
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A Technology Platform for Enabling Next-Generation Vacuum Electronic Devices Based on Silicon Field Emitter Arrays
… their ballistic transport and higher breakdown field, nanoscale vacuum-channel transistors are expected to show better performance in a wide variety of high-frequency, high-power, or harsh environment applications. Silicon field emitter arrays (FEAs) are a proven and mature technology that can …
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Ordered Nanomaterials for Electron Field Emission
In the quest for reliable, repeatable and stable field electron emission that has commercial potential, whilst many attempts have been made, none yet has been truly distinguishable as being successful. Whilst I do not claim within this thesis to have uncovered the secret to success, fundamental …
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Theory and modeling of field electron emission from low-dimensional electron systems
… have succeeded in fabricating nanoscale field electron emitters in a variety of geometries and materials for use as electron sources in vacuum nanoelectronic devices, theory and modeling of field electron emission have not kept pace. Treatments of field emission which address individual …
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Field emission from carbon nanotubes deposited on platinum and nickel/nickel oxide multilayers
… carbon nanotubes have been shown to be excellent field emitters, very little is known about the emission mechanism. This work strives to gain insight on field enhancement in films of single-walled carbon nanotubes by studying the internal field emission between the back contact metal and the …
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CVD Grown Graphene-Based Materials: Synthesis, Characterization and Applications
… applications of as-synthesized materials like field emitters, supercapacitors, and catalysts for water splitting are discussed.
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Double-gated field emission arrays
… fabricates and characterizes double-gated field emission devices with high aspect ratio. One of the gates extracts the electrons while the second gate focuses the electrons into small spots. High aspect ratio silicon field emitters were defined by reactive ion etching of silicon followed by …
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Double-gated isolated vertically aligned carbon nanofiber field emission and field ionization arrays
… vertically aligned carbon nanofiber (VACNF) field emission and field ionization arrays have been developed. These arrays were characterized as field ionizers, which could produce molecular ions without severe fragmentation; and as field emitters, which act as an electron source with a fast …
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Silicon field emission pressure sensor
… advantages of using vacuum as device medium and field emission cathode as electron source, a renewed interest in vacuum microelectronics utilizing advanced IC technology is emerging. This thesis demonstrates an application of field emission emitters in two novel pressure sensors. One is based on …
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Field emission from silicon
A field emitter serves as a cold source of electrons. It has practical applications in various fields such as field emission flat panel displays, multiple electron-beam lithography, ion propulsion/micro-thrusters, radio frequency source, information storage technology, and electronic cooling. …
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Feature scaling of large, ballasted, field emission arrays
Field emitters are an exciting technology for high-frequency, high-power applications because of their excellent free space electron transport, and their potential for high current density and high current, especially when they are used in an array format. However, a major challenge preventing the …
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Development of a flat-panel x-ray source
… detection system. The design incorporates a field emission cathode made of ultra-nanocrystalline diamonds (UNCD) doped with nitrogen. These field emitters show good electron output at low power and can be deposited over large areas as is the case with carbon nanotube "forest" (CNT) cathodes. …
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Miniaturized electron-impact-ionization pumps using double-gated isolated vertically aligned carbon nanotube arrays
… Our micropump architecture consist of a field-emission electron source that is an array of double-gated isolated vertically aligned carbon nanotubes (VA-CNTs), an electronimpact- ionization region, and a non-evaporative ion-implantation getter. Single-gated VA-CNT FEAs were tested as …
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Vacuum Transistors Based on III-Nitrides Field Emitter Arrays with Self-Aligned Gate
… and radiation-robust vacuum channels. Field-emission vacuum transistors based on silicon and metals have been demonstrated over past 30 years, however the power consumption and long-term device stability are still issues. To further improve the field emission device performance and …
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Field emission from organic materials
Field emission displays (FEDs) show great promise as high performance flat panel displays. The light emission process is efficient, long lifetimes are possible with high brightness, and bright passive matrix displays can be built. Because passive matrix displays don't need a transistor backplane, …
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