Enhancement of the Electron Field Emission Properties of Ultrananocrystalline Diamond Films via Hydrogen Post-Treatment

Sankaran, Kamatchi Jothiramalingam; Srinivasu, K.; Leou, Keh-Chyang; Tai, Nyan‐Hwa; Lin, I‐Nan

doi:10.1021/am503823n

Cited by 24 publications

(12 citation statements)

References 50 publications

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“…Such boundary conduction channels have been reported to be formed from a sp 2 hybridized graphitic carbon similar to disordered graphene [32], additionally there have also been studies suggesting structurally arranged boron of exist within the boundaries leading to interfacial superconductivity [33]. As explained in the previous section there is a strong possibility for a charge Kondo effects in this system, this leads to interesting possibility of a charge-BKT instead of conventional vortex-BKT transition occurring here.…”

Section: B Current-voltage Analysissupporting

confidence: 51%

Finite bias evolution of bosonic insulating phase and zero bias conductance in boron-doped diamond: A charge-Kondo effect

Mtsuko¹,

Coleman²,

Bhattacharyya³

2019

EPL

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We report on transport features in heavily boron doped nanocrystalline diamond (BNCD) films which are not seen in conventional (s-wave) granular superconductors. Observations include an anomalous resistance peak near to the superconducting transition temperature as well as a strong zero bias conductance peak in the current-voltage spectra. The effect of finite bias current on the evolution of the resistance peak is systematically investigated in this system. The shape of the resistance-temperature curves near the critical temperature is seen to be strongly influenced by both magnetic field and bias current. As the bias current is lowered the resistance peak becomes more pronounced whereas when the magnetic field is varied the peak shifts towards lower temperatures, the resistance upturn shows a quadratic temperature dependence as expected for a Kondo transition. We find that a number of transport features such as resistance peak height, zero bias conduction peak height and width as well as magnetoresistance peaks scale according to a power law dependence. We interpret these features as a result of a charge-Kondo effect where hole dopants act as degenerate Kondo impurities by opening additional pseudo-spin scattering channels. I.

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Section: B Current-voltage Analysissupporting

confidence: 51%

Finite bias evolution of bosonic insulating phase and zero bias conductance in boron-doped diamond: A charge-Kondo effect

Mtsuko¹,

Coleman²,

Bhattacharyya³

2019

EPL

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“…The negative electron affinity of DNWs has been used in field emission studies. Recently, reports on the electron field emission (EFE) properties of CVD-developed ultracrystalline Diamond Nanowire Synthesis, Properties and Applications http://dx.doi.org/10.5772/intechopen.78794 diamond and hybrid diamond-graphite films were reported [78,79]. In this way, the EFEs of DNWs were also been described by (A) planar DNWs array and (B) single DNW.…”

Section: Field Emission Applications Of Dnwsmentioning

confidence: 99%

Diamond Nanowire Synthesis, Properties and Applications

Shellaiah¹,

Sun²

2019

Nanowires - Synthesis, Properties and Applications

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Due to the superior hardness and Young's modulus, biocompatibility, optical and fluorescence nanodiamond seems to be outstanding among carbon nanomaterials. In this footpath, the development of diamond nanowires (DNWs) is known to be a significantly innovative field due to their diverse applications such as sensors, semiconductors, and electrochemical utilities. Compared to carbon nanotubes, DNWs theoretically have energetic and mechanically viable structures. However, DNW synthesis in a reproducible way is still a challenging task. In fact, most of the DNWs can be successfully synthesized by chemical vapor deposition (CVD) and reactive-ion etching (RIE) techniques. By contrast, solution-based DNW synthesis has also emerged recently. A detailed study on DNW structures may help the emerging researchers to direct toward diverse applications. In this chapter, we comprehensively presented the up-to-date applications of DNWs along with their synthesis, structures and properties.

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“…The application of cold cathode emitters in X-ray source systems has gained much attention because of digitalized active control switching and relatively lower radiation emission compared to traditional thermionic emitters [ 13 ]. Although Si nanorods [ 14 ], ZnO nanorods [ 15 ], Mo [ 16 ], MoS 2 [ 17 ], diamond films [ 18 ], graphene [ 19 ] etc. could be used as cold cathode emitters, none of them have proven to be as efficient as CNT-based emitters.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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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 emission devices, they are promising replacements for thermionic emitters in widely accessible X-ray source electron guns. High performance CNT emitter samples were prepared in optimized plasma conditions through the plasma-enhanced chemical vapor deposition (PECVD) process and subsequently characterized by using a scanning electron microscope, tunneling electron microscope, and Raman spectroscopy. For the cathode current, field emission (FE) characteristics with respective turn on (1 μA/cm2) and threshold (1 mA/cm2) field of 2.84 and 4.05 V/μm were obtained. For a field of 5.24 V/μm, maximum current density of 7 mA/cm2 was achieved and a field enhancement factor β of 2838 was calculated. In addition, the CNT emitters sustained a current density of 6.7 mA/cm2 for 420 min under a field of 5.2 V/μm, confirming good operational stability. Finally, an X-ray generated image of an integrated circuit was taken using the compact field emission device developed herein.

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Enhancement of the Electron Field Emission Properties of Ultrananocrystalline Diamond Films via Hydrogen Post-Treatment

Cited by 24 publications

References 50 publications

Finite bias evolution of bosonic insulating phase and zero bias conductance in boron-doped diamond: A charge-Kondo effect

Finite bias evolution of bosonic insulating phase and zero bias conductance in boron-doped diamond: A charge-Kondo effect

Diamond Nanowire Synthesis, Properties and Applications

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

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