Plasma post-treatment process for enhancing electron field emission properties of ultrananocrystalline diamond films

Yeh, Chien-Jui; Chang, Hsin-Tzer; Leou, Keh-Chyang; Lin, I‐Nan

doi:10.1016/j.diamond.2015.10.013

Cited by 9 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…В то же время, показано, что присутствие проводящей фазы на границах раздела зерен может формировать каналы проводимости, облегчающие перенос электронов [81]. Вследствие этого для образцов на основе наноалмазов, содержащих на границах зерен графитизированную или углеводородную субструктуру, значение поля активации эмиссии составляет порядка 10−30 V/µm [82,83]. Таким образом, характеристики полевой эмиссии исследуемых образцов находятся в соответствии с приведенной в разделах 3.1−3.3 структурной аттестацией, а также свидетельствуют о том, что исследуемые условия осаждения позволили изготовить покрытия со сравнительно низким порогом активации эмиссии.…”

Section: электронная эмиссия под действием электрического поляunclassified

Полученные плазменно-химическим осаждением a-C : ND покрытия: взаимосвязь эмиссионных свойств и фазового состава

Завидовский¹,

Стрелецкий²,

Татаринцев³

et al. 2023

Физика Твердого Тела

View full text Add to dashboard Cite

The coatings comprised of the nanodiamond-based and amorphous-carbon-based phases (a-C:ND coatings) are investigated. The a-C:ND coatings were synthesized by chemical vapor deposition in the arc discharge plasma (by plasma chemical deposition) at various concentrations of Ar/H2/CH4. Raman spectroscopy showed that, apart from the diamond substructure, studied coatings contain amorphous-carbon-based and polyene-based phases, while diamond phase is passivated by hydrogen to different degrees. The interplay between the deposition parameters and materials' structure is analysed. It was shown that the ordering of the amorphous substructure and the formation of the phase boundaries affect the electron transport and secondary electron emission properties. The subject of the investigation of the true secondary electron spectra for the analysis of the nanostructured carbon materials is analysed. It was shown that the change of the polyene fraction in the structure of the samples leads to the variation of the ratio of field emission and thermionic emission. The influence of the structure and phase composition of the samples on their electron emission properties is investigated. In particular, their effect on the turn on-field, which value varied in the 9-18 V/μm range for the studied samples, is analysed.

show abstract

Section: электронная эмиссия под действием электрического поляunclassified

Полученные плазменно-химическим осаждением a-C : ND покрытия: взаимосвязь эмиссионных свойств и фазового состава

Завидовский¹,

Стрелецкий²,

Татаринцев³

et al. 2023

Физика Твердого Тела

View full text Add to dashboard Cite

show abstract

“…At the same time, it has been shown that the presence of a conductive phase at intergrain interfaces can form conductance channels that facilitate the transfer of electrons [81]. Therefore, the emission turn-on field for nanodiamond-based samples with graphitized or carbon substructure at their intergrain interfaces is about 10−30 V/µm [82,83].…”

Section: Electron Emission Under Electric Fieldmentioning

confidence: 99%

a-C : ND coatings obtained by plasma chemical deposition: interplay between field emission properties and phase composition

Zavidovskiy I.A.,

Streletskiy O.A.,

Tatarintsev A.A.

et al. 2023

Physics of the Solid State

View full text Add to dashboard Cite

The coatings comprised of the nanodiamond-based and amorphous-carbon-based phases (a-C : ND coatings) are investigated. The a-C : ND coatings were synthesized by chemical vapor deposition in the arc discharge plasma (by plasma chemical deposition) at various concentrations of Ar/H2/CH4. Raman spectroscopy showed that, apart from the diamond substructure, studied coatings contain amorphous-carbon-based and polyene-based phases, while diamond phase is passivated by hydrogen to different degrees. The interplay between the deposition parameters and materials' structure is analysed. It was shown that the ordering of the amorphous substructure and the formation of the phase boundaries affect the electron transport and secondary electron emission properties. The subject of the investigation of the true secondary electron spectra for the analysis of the nanostructured carbon materials is analysed. It was shown that the change of the polyene fraction in the structure of the samples leads to the variation of the ratio of field emission and thermionic emission. The influence of the structure and phase composition of the samples on their electron emission properties is investigated. In particular, their effect on the turn on field, which value varied in the 9-18 V/μm range for the studied samples, is analysed. Keywords: nanodiamond composites, polyene-like materials, electron transport, hydrogen passivation, turn-on field.

show abstract

“…Diamond possesses some of the most useful physical properties such as high hardness, wear resistance, optical transparency, thermal conductivity, unique semiconductor characteristics, lowest compressibility, intrinsically low friction and inertness towards most chemical reagents. These unique characteristics of diamond make it attractive for several applications including wear resistant coatings, cutting tools for non-ferrous materials, as heat spreaders for electronic devices, flat panel displays and transparent windows for infrared light [1,2,3,4]. However, the practical use of diamonds in science and engineering applications are limited due to their scarcity and high cost.…”

Section: Introductionmentioning

confidence: 99%

Role of microstructure and structural disorder on tribological properties of polycrystalline diamond films

Ajikumar

Ganesan

Kumar

et al. 2019

Applied Surface Science

View full text Add to dashboard Cite

Polycrystalline diamond films with systematic change in microstructure that varies from microcrystalline to nanocrystalline structure are synthesized on Si by hot filament chemical vapor deposition. The morphology and structural properties of the grown diamond films are analyzed using field emission scanning electron microscope (FESEM), atomic force microscope (AFM), X-ray diffraction and Raman spectroscopy. The average roughness and grain size of the diamond films decrease with increase in CH4 to H2 ratio from 0.5 to 3 %. Also, structural disorder in these diamond films increases with decrease in grain size as evidenced from Raman spectroscopy. The coefficient of friction (CoF) is found to be very low for all the films.However, the average CoF is found to increase from 0.011±0.005 to 0.03±0.015 as the grain size decrease from ~ 1 m down to ~20 nm. Post analysis of wear track by FESEM, AFM based nanoscale friction and Raman spectroscopy reveal that microcrystalline diamond undergoes shear induced amorphization with negligible wear rate while nanocrystalline diamond films undergo shear induced plastic deformation without amorphization. A comprehensive mechanism for the observed CoF is discussed in the framework of microstructure, structural disorder and shear induced tribo-chemical reactions at the sliding interface.

show abstract

Plasma post-treatment process for enhancing electron field emission properties of ultrananocrystalline diamond films

Cited by 9 publications

References 24 publications

Полученные плазменно-химическим осаждением a-C : ND покрытия: взаимосвязь эмиссионных свойств и фазового состава

Полученные плазменно-химическим осаждением a-C : ND покрытия: взаимосвязь эмиссионных свойств и фазового состава

a-C : ND coatings obtained by plasma chemical deposition: interplay between field emission properties and phase composition

Role of microstructure and structural disorder on tribological properties of polycrystalline diamond films

Contact Info

Product

Resources

About