High performance graphene foam emitter

Kim, Taewoo; Lee, Jeong Seok; Li, Kunzhou; Kang, Tae June; Kim, Yong Hyup

doi:10.1016/j.carbon.2016.01.101

Cited by 12 publications

(10 citation statements)

References 47 publications

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“…Low‐dimensional nanomaterials, and in particular nanocarbon‐based materials (such as carbon nanotubes (CNTs) and graphene), have experienced significant interest for their application in electron tunneling applications. [ 67–71 ] Their atomic‐scale thickness, ability to self‐assemble, and unique topologies provide extremely high aspect ratios and thus very high field‐enhancement factors that are not attainable by conventional materials and traditional processing either through direct growth or etching. Of the wide range of nanowires discovered and synthesized to date, CNTs have perhaps attracted by far the most attention for use in electron emission systems.…”

Section: Recent Developments Of Electric‐field‐driven Tunneling Devicesmentioning

confidence: 99%

Ultrafast Electron Tunneling Devices—From Electric‐Field Driven to Optical‐Field Driven

et al. 2021

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The search for ever higher frequency information processing has become an area of intense research activity within the micro, nano, and optoelectronics communities. Compared to conventional semiconductor‐based diffusive transport electron devices, electron tunneling devices provide significantly faster response times due to near‐instantaneous tunneling that occurs at sub‐femtosecond timescales. As a result, the enhanced performance of electron tunneling devices is demonstrated, time and again, to reimagine a wide variety of traditional electronic devices with a variety of new “lightwave electronics” emerging, each capable of reducing the electron transport channel transit time down to attosecond timescales. In response to unprecedented rapid progress within this field, here the current state‐of‐the‐art in electron tunneling devices is reviewed, current challenges and opportunities are highlighted, and possible future research directions are identified.

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Section: Recent Developments Of Electric‐field‐driven Tunneling Devicesmentioning

confidence: 99%

Ultrafast Electron Tunneling Devices—From Electric‐Field Driven to Optical‐Field Driven

et al. 2021

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“…Because of the existence of oxygen-containing functional groups on GO, GO has a negative charge and good hydrophilicity in water, so GO is generally used as the precursor during the electrodeposition process [51]. The results show that the presence of Cu atoms is beneficial to the reduction of GO [61,62]. Electrolysis of a Cu ion on the Cu anode can remove part of the oxygen-containing functional groups on GO, and the Cu-O-C bonding can be formed between the residual oxygen on RGO and Cu, resulting in the enhancement of the interfacial bonding strength of the Cu-RGO composites.…”

Section: Electro-induced Preparationmentioning

confidence: 99%

Graphene-Based Films: Fabrication, Interfacial Modification, and Applications

et al. 2021

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Graphene-based film attracts tremendous interest in many potential applications due to its excellent thermal, electrical, and mechanical properties. This review focused on a critical analysis of fabrication, processing methodology, the interfacial modification approach, and the applications of this novel and new class material. Strong attention was paid to the preparation strategy and interfacial modification approach to improve its mechanical and thermal properties. The overview also discussed the challenges and opportunities regarding its industrial production and the current status of the commercialization. This review showed that blade coating technology is an effective method for industrial mass-produced graphene film with controllable thickness. The synergistic effect of different interface interactions can effectively improve the mechanical properties of graphene-based film. At present, the application of graphene-based film on mobile phones has become an interesting example of the use of graphene. Looking for more application cases is of great significance for the development of graphene-based technology.

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“…A. DC field emission in graphene Low-dimensional carbon materials, such as graphene and CNTs, have nanoscale morphology, capable of producing high emission current density, due to their high damage threshold [74][75][76][77]. In particular, CNTs have been extensively investigated as alternative thermionic emitters.…”

Section: Strong-field Photoemission In Graphenementioning

confidence: 99%

“…This is due to its high aspect ratio, high carrier density, larger carrier mobility, and mechanical stability. Graphene-based DC field emitters have been recently demonstrated in the absence of illumination [76,77,125]; conversely, electron dynamics in the strong-field subcycle regime have also been recently demonstrated, using a femtosecond laser [126].…”

Section: Strong-field Photoemission In Graphenementioning

confidence: 99%

“…The development of novel, functional devices are required to achieve the unprecedented control for the subcycle electron yield, the maximum kinetic energy of electrons, and an efficient emission direction. Low-dimensional carbon materials, such as graphene and carbon nanotubes (CNTs), have nanoscale morphology capable of producing high emission current density due to their high damage threshold [74][75][76][77]. Therefore, they potentially serve as an ideal platform for ultrafast field emission devices in the strong tunneling regime due to their high aspect ratio, high carrier density, larger carrier mobility, and mechanical stability.…”

Section: Introductionmentioning

confidence: 99%

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Ultrashort field emission in metallic nanostructures and low-dimensional carbon materials

Park

Ahn

2020

Advances in Physics: X

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This study investigates recent advances in photoelectron emission generated by irradiating ultrashort lasers on metallic nanostructures and low-dimensional carbon materials. Recently, primary focus has been on improving the efficiency of emitters, i.e. increasing the number of field-emitted electrons and their respective kinetic energies. An example of this is the modification of the conventional metal nanotip through adiabatic nanofocusing and various plasmonic metal structures, such as nanorods and bowtie antenna. The coherent emission control with two color irradiation enabled modulation in the emission yield. In addition, THz waves near the metallic nanostructure induced a highly accelerated, monochromatic energy. Alternative to metallic nanotips, carbon nanotubes are emerging as efficient photoelectron emitters, due to the large enhancement factor associated with their high aspect ratio and damage threshold. They particularly allowed the use of femtosecond light sources with a relatively short wavelength, resulting in the generation of photoelectrons with a narrow bandwidth. Additionally, electronic control over the singlewalled nanotubes band structure added a degree of freedom for controlling the electron emission yield. Finally, we review the strong-field tunneling emission in graphene edge, with the emission yield showing an anomalous increase of nonlinear order, corresponding to the deep strong tunneling regime.

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High performance graphene foam emitter

Cited by 12 publications

References 47 publications

Ultrafast Electron Tunneling Devices—From Electric‐Field Driven to Optical‐Field Driven

Ultrafast Electron Tunneling Devices—From Electric‐Field Driven to Optical‐Field Driven

Graphene-Based Films: Fabrication, Interfacial Modification, and Applications

Ultrashort field emission in metallic nanostructures and low-dimensional carbon materials

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