Field electron emission ≈ Field electron emission
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Generalized Mechanism of Field Emission from Nanostructured Semiconductor Film Cathodes Open
Considering the effect of both the buffer layer and substrate, a series of ultrathin multilayered structure cathodes (UTMC) is constructed to simulate the field emission (FE) process of nanostructured semiconductor film cathodes (NSFCs). W…
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Enhanced Multi-MeV Photon Emission by a Laser-Driven Electron Beam in a Self-Generated Magnetic Field Open
We use numerical simulations to demonstrate that a source of collimated multi-MeV photons with high conversion efficiency can be achieved using an all-optical single beam setup at an intensity of 5×10^{22} W/cm^{2} that is already within r…
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Field Emission from Carbon Nanostructures Open
Field emission electron sources in vacuum electronics are largely considered to achieve faster response, higher efficiency and lower energy consumption in comparison with conventional thermionic emitters. Carbon nanotubes had a leading rol…
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Aggregation‐induced emission of copper nanoclusters Open
Copper nanoclusters (Cu NCs) have recently emerged as promising luminophores, featuring ultra‐small size, reasonable photostability, large Stokes shift, and long emission lifetimes. Aggregation‐induced emission (AIE) has been often used to…
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Nanofabrication of arrays of silicon field emitters with vertical silicon nanowire current limiters and self-aligned gates Open
We developed a fabrication process for embedding a dense array (10(8) cm(-2)) of high-aspect-ratio silicon nanowires (200 nm diameter and 10 μm tall) in a dielectric matrix and then structured/exposed the tips of the nanowires to form self…
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A WSe<sub>2</sub> vertical field emission transistor Open
We demonstrate a back-gate modulated field-emission current from a WSe2 monolayer and propose a new field-emission vertical transistor concept.
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Review—Growth of Al-, Ga-, and In-Doped ZnO Nanostructures via a Low-Temperature Process and Their Application to Field Emission Devices and Ultraviolet Photosensors Open
In recent decades, ZnO-based nanostructures have attracted considerable attention because of their various possible morphologies, large surface-to-volume ratios, non-toxicity, easy synthesis, low cost, and excellent physical properties for…
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Transport and Field Emission Properties of MoS2 Bilayers Open
We report the electrical characterization and field emission properties of MoS 2 bilayers deposited on a SiO 2 / Si substrate. Current–voltage characteristics are measured in the back-gate transistor configuration, with Ti contacts pattern…
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Ultrafast Field‐Emission Electron Sources Based on Nanomaterials Open
The search for electron sources with simultaneous optimal spatial and temporal resolution has become an area of intense activity for a wide variety of applications in the emerging fields of lightwave electronics and attosecond science. Mos…
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A high-brightness large-diameter graphene coated point cathode field emission electron source Open
There have been several long-standing problems of cold field emission sources for electron microscopy and lithography that have prevented their widespread use, such as their inherent ultrahigh vacuum condition requirement (10 −8 torr) and …
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Interface inter-atomic electron-transition induced photon emission in contact-electrification Open
The contact-electrification induced interface photon emission spectroscopy is revealed by electrons transfer at the interface.
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Effect of Electron Irradiation on the Transport and Field Emission Properties of Few-Layer MoS<sub>2</sub> Field-Effect Transistors Open
Electrical characterization of few-layer MoS2 based field effect transistors\nwith Ti/Au electrodes is performed in the vacuum chamber of a scanning electron\nmicroscope in order to study the effects of electron beam irradiation on the\ntr…
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A universal formula for the field enhancement factor Open
The field enhancement factor (FEF) is an important quantity in field emission calculations since the tunneling electron current depends very sensitively on its magnitude. The exact dependence of FEF on the emitter height h, the radius of c…
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Transitions between electron emission and gas breakdown mechanisms across length and pressure scales Open
This Perspective outlines theoretical, simulation, and experimental studies linking electron emission and gas breakdown. Many studies have investigated field emission-driven microscale gas breakdown, including recent reviews [Garner et al.…
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Graphene enhanced field emission from InP nanocrystals Open
We report the observation of field emission (FE) from InP nanocrystals (NCs) epitaxially grown on an array of p-Si nanotips. We prove that FE can be enhanced by covering the InP NCs with graphene. The measurements are performed inside a sc…
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Tunable graphene micro-emitters with fast temporal response and controllable electron emission Open
Microfabricated electron emitters have been studied for half a century for their promising applications in vacuum electronics. However, tunable microfabricated electron emitters with fast temporal response and controllable electron emissio…
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Carbon Nanotube Field Emitters Synthesized on Metal Alloy Substrate by PECVD for Customized Compact Field Emission Devices to Be Used in X-Ray Source Applications Open
In this study, a simple, efficient, and economical process is reported for the direct synthesis of carbon nanotube (CNT) field emitters on metal alloy. Given that CNT field emitters can be customized with ease for compact and cold field em…
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Excitonic Emission of Monolayer Semiconductors Near-Field Coupled to High-Q Microresonators Open
We present quantum yield measurements of single layer WSe2 (1L-WSe2) integrated with high-Q ( Q > 106) optical microdisk cavities, using an efficient (η > 90%) near-field coupling scheme based on a tapered optical fiber. Coupling of the ex…
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Ultrasensitive 1D field-effect phototransistors: CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> nanowire sensitized individual carbon nanotubes Open
Field-effect phototransistors were fabricated based on individual carbon nanotubes (CNTs) sensitized by CH3NH3PbI3 nanowires (MAPbI3NWs).
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Process-specific mechanisms of vertically oriented graphene growth in plasmas Open
Applications of plasma-produced vertically oriented graphene nanosheets (VGNs) rely on their unique structure and morphology, which can be tuned by the process parameters to understand the growth mechanism. Here, we report on the effect of…
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Practical nanoscale field emission devices for integrated circuits Open
Nanoscale field emission devices promise many advantages over traditional solid-state devices including fast switching speeds, extreme operating temperatures, and radiation hardness. Despite this, practical circuits have long been hampered…
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Theoretical assessment of transitions across thermionic, field, and space-charge-limited emission Open
As electron emission devices continue to push technological limits of device size, electric field, and temperature, characterization of device limitations due to thermionic (TE), field (FE), and space-charge-limited emission (SCLE) becomes…
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Ultracold Electrons via Near-Threshold Photoemission from Single-Crystal Cu(100) Open
Achieving a low mean transverse energy or temperature of electrons emitted from the photocathode-based electron sources is critical to the development of next-generation and compact x-ray free electron lasers and ultrafast electron diffrac…
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Hydrothermal synthesis of MoS2 with tunable band gap for future nano-electronic devices Open
Transition metal dichalcogenides (TMDs) have been explored in various domains of science and technology in the past few years. Among the numerous transition metal dichalcogenides, MoS2 has sparked the interest of researchers owing to its p…
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Carbon Nanotubes as an Ultrafast Emitter with a Narrow Energy Spread at Optical Frequency Open
Ultrafast electron pulses, combined with laser‐pump and electron‐probe technologies, allow ultrafast dynamics to be characterized in materials. However, the pursuit of simultaneous ultimate spatial and temporal resolution of microscopy and…
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Field-Emission Scanning Electron Microscope as a Tool for Large-Area and Large-Volume Ultrastructural Studies Open
The development of field-emission scanning electron microscopes for high-resolution imaging at very low acceleration voltages and equipped with highly sensitive detectors of backscattered electrons (BSE) has enabled transmission electron m…
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Characterization of graphene nanosheets obtained by a modified Hummer's method Open
Natural graphite is an inexpensive and abundant source to obtain graphene nanosheets. The most efficient method for large-scale production is the chemical method, which is based on the oxidation of natural graphite. This paper reports the …
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Ultralow Voltage GaN Vacuum Nanodiodes in Air Open
The III-nitride semiconductors have many attractive properties for field-emission vacuum electronics, including high thermal and chemical stability, low electron affinity, and high breakdown fields. Here, we report top-down fabricated gall…
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Direct Synthesis of Carbon Nanotube Field Emitters on Metal Substrate for Open-Type X-ray Source in Medical Imaging Open
We report the design, fabrication and characterization of a carbon nanotube enabled open-type X-ray system for medical imaging. We directly grew the carbon nanotubes used as electron emitter for electron gun on a non-polished raw metallic …
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Characterization of a time-resolved electron microscope with a Schottky field emission gun Open
The rapid growth of the field of time-resolved and ultrafast electron microscopy has been accompanied by the active development of new instrumentation. Recently, time-resolved microscopes equipped with a field emission gun have been introd…