Current-voltage characteristics of carbon nanostructured field emitters in different power supply modes

Popov, E. O.; Kolosko, Anatoly G.; Filippov, Sergey V.; Romanov, P.A.; Теруков, Е. И.; Shchegolkov, Alexander; Ткачев, А. Г.

doi:10.1016/j.apsusc.2017.04.120

Cited by 16 publications

(5 citation statements)

References 23 publications

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“…Попов схематическое изображение искомых площадей и методов их вычисления. В таблице представлены результаты оценок десяти видов площадей эмиссии (последние две разбиваются на приближения Элинсона и Форбса), которые были получены для напряжения 1.5 kV (это напряжение, при котором наблюдается полевая эмиссия для макроскопических нанокомпозитных эмиттеров на основе нанотрубок [41]). В отдельном столбце указано число сегментов, которое охватывает каждая рассчитанная площадь на вершине модели (всего сегментов в модели 1000).…”

Section: моделирование расчет и сравнение видов эмиссионных площадейunclassified

Десять Способов Определения Площади Полевой Эмиссии

Попов¹,

Колосько²,

Чумак³

et al. 2019

Журнал Технической Физики

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A variety of types for formal determination of one of the main parameters of field emission systems - the emission area was investigated. Using hemisphere on a cylindrical post model built using the COMSOL Multiphysics software package the relationship between known types of emission area estimation was shown. The corresponding values of emission currents were calculated. It was shown that the formal emission area (the ratio of the total current to the current density at the top) provides only ~ 75% of the emission current value. The effect of the anomalous behavior of the effective emission area (intercept of the trend line of current-voltage characteristics) is obtained when the voltage level changes in standard Fowler-Nordheim coordinates. A method for an experimental estimate of the field emission area using the modified Fowler-Nordheim coordinates ln (I/U^(2-η/6)) vs 1/U is proposed. The method is applied to the analysis of field emission data of a multi-tip nanocomposite emitter with carbon nanotubes.

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Section: моделирование расчет и сравнение видов эмиссионных площадейunclassified

Десять Способов Определения Площади Полевой Эмиссии

Попов¹,

Колосько²,

Чумак³

et al. 2019

Журнал Технической Физики

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“…Данный подход позволяет получать характеристики повышенной гладкости, отличающиеся от характеристик, полученных в режиме медленного сканирования постоянным напряжением. Взаимосвязь быстрых ВАХ и медленных была изучена ранее в работе [14]. Высокая скорость регистрации ВАХ в совокупности с разработанной методикой онлайнобработки данных обеспечивает возможность расчета не только эффективных характеристик катода (коэффициент усиления поля β eff и площадь эмиссии S eff ), но и их стохастического разброса, который характеризует степень изменчивости ВАХ и является одной из причин временной нестабильности эмиссионного тока.…”

Section: методика экспериментаunclassified

Разработка Технологических Принципов Создания Системы Микрофокусных Рентгеновских Трубок На Основе Кремниевых Автоэмиссионных Нанокатодов

Дюжев¹,

Демин²,

Филиппов³

et al. 2019

Журнал Технической Физики

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The technological prospects for the creation of a system of microfocus X-ray tubes with the use of silicon field emission of nanocathodes have been discussed. A numerical analysis of the field-emission current from a nanoscale semiconductor cathode regulated by voltage on a grid electrode has been carried out on the basis of which a scheme for controlling the elements of the matrix of field-emission cathode assemblies has been proposed. The current–voltage characteristics of silicon field emission nanocathodes have been measured. They are in good agreement with the theoretical estimates of the field-emission current. A full technological cycle of the development of elements of microfocus X-ray tubes (a set of field-emission cathode assemblies and a set of anode assemblies) has been performed. The results can be used to create systems of microfocus X-ray tubes for nanolithographic equipment of a new generation.

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“…In addition to high aspect ratio, field emission from graphene cathodes demonstrates another intriguing feature, namely, huge hysteresis in current–voltage dependences . Hysteresis in current–voltage characteristics of field emission may be due to a variety factors such as the emitter temperature, sorption of residual gases on the emitter's surface, and mechanical changes of the emitter's shape under the influence of an electromagnetic field …”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] Hysteresis in currentvoltage characteristics of field emission may be due to a variety factors such as the emitter temperature, sorption of residual gases on the emitter's surface, and mechanical changes of the emitter's shape under the influence of an electromagnetic field. [6][7][8][9][10] Hysteresis in field emission is ubiquitous (e.g., see refs. [4,[11][12][13][14]).…”

Section: Introductionmentioning

confidence: 99%

A Memristive Model for Graphene Emitters: Hysteresis and Self‐Crossing

Gorodetskiy

Shevchenko

Гусельников

et al. 2020

Physica Status Solidi (b)

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Hysteresis exhibited by current–voltage characteristics during field‐emission experiments is often considered undesirable in terms of practical applications. However, this is an appealing effect for the purposes of memristive devices. A two‐stage model to describe hysteretic characteristics is developed, with a particular focus on the system which includes a cathode made of a single‐layered graphene sheet on a substrate. In addition to hysteresis, the current–voltage curves also display an unusual self‐crossing behavior. The presented memristive model can be used for quantitative description of different hysteretic characteristics such as abrupt changes and self‐crossings and for understanding and modeling the processes associated with field emission from plane graphene emitters.

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Current-voltage characteristics of carbon nanostructured field emitters in different power supply modes

Cited by 16 publications

References 23 publications

Десять Способов Определения Площади Полевой Эмиссии

Десять Способов Определения Площади Полевой Эмиссии

Разработка Технологических Принципов Создания Системы Микрофокусных Рентгеновских Трубок На Основе Кремниевых Автоэмиссионных Нанокатодов

A Memristive Model for Graphene Emitters: Hysteresis and Self‐Crossing

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