Charge generation on dielectric surfaces

Davies, D K

doi:10.1088/0022-3727/2/11/307

Cited by 535 publications

(220 citation statements)

References 5 publications

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“…The data in Tables III and IV show that the repetition rate is both field and temperature dependent, which would be consistent with a number of interface processes. The lack of detailed knowledge of the interface 28,[41][42][43][44] however, makes it impossible to make an analytical calculation of surface charge replenishment via transfer of charge to surface states, either from the electrode or by ionisation of impurity molecules located in the surface region.…”

Section: Discussionmentioning

confidence: 99%

Fast soliton-like charge pulses in insulating polymers

Dissado

Montanari

Fabiani

2011

Journal of Applied Physics

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A previously unknown mode of conduction is identified in insulating polymers at moderate fields (40-50 MV/m). This takes the form of coherent charged pulses with a mobility ($10 À10 m 2 V À1 s À1 ) several orders of magnitude larger than that traditionally associated with independent charge carriers ($10 À14 m 2 V À1 s À1 ). It is shown that this phenomenon is consistent with a mechanism in which a charged compression boundary is formed electro-mechanically during injection and thereafter travels as a coherent solitary wave (soliton) through the polymer.

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Section: Discussionmentioning

confidence: 99%

Fast soliton-like charge pulses in insulating polymers

Dissado

Montanari

Fabiani

2011

Journal of Applied Physics

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“…Specific electron transfer models have been developed for electrification in metalinsulator contact, for example; involving an effective potential difference (Davies 1969) or performing quantum chemical (electron state) calculations (Shirakawa et al 2008). Other models have also studied multiple surface impacts; one involved a capacitance charging model including charge relaxation (electrical discharge) (Matsusyama and Yamamoto 2006).…”

Section: Models and Theories For Dust And Sand Electrificationmentioning

confidence: 99%

Applications of Electrified Dust and Dust Devil Electrodynamics to Martian Atmospheric Electricity

et al. 2016

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Atmospheric transport and suspension of dust frequently brings electrification, which may be substantial. Electric fields of 10 kV m −1 to 100 kV m −1 have been observed at the surface beneath suspended dust in the terrestrial atmosphere, and some electrification has been observed to persist in dust at levels to 5 km, as well as in volcanic plumes. The interaction between individual particles which causes the electrification is incompletely understood, and multiple processes are thought to be acting. A variation in particle charge with particle size, and the effect of gravitational separation explains to, some extent, the charge structures observed in terrestrial dust storms. More extensive flow-based modelling demonstrates that bulk electric fields in excess of 10 kV m −1 can be obtained rapidly (in less than 10 s) from rotating dust systems (dust devils) and that terrestrial breakdown fields can be obtained. Modelled profiles of electrical conductivity in the Martian atmosphere suggest the possibility of dust electrification, and dust devils have been suggested as a mechanism of charge separation able to maintain current flow between one region of the atmosphere and another, through a global circuit. Fundamental new understanding of Martian atmospheric electricity will result from the ExoMars mission, which carries the DREAMS (Dust characterization, Risk Assessment, and Environment Analyser on the Martian Surface)-B R.G. Harrison

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“…Other reports have demonstrated that charging can take place in vacuum between freshly cleaved polymer surfaces that were never exposed to the atmosphere. 28,[46][47][48] However, this evidence does not preclude the hydroxide ion mechanism when water is present. It is becoming a recurrent theme in reports that more than one mechanism may be involved in any contact charging event.…”

Section: The Case For Ion Exchangementioning

confidence: 87%

“…A clear distinction needs to be made between metalinsulator and insulator-insulator contacts, these being totally different situations from the point of view of triboelectric charging mechanisms. For metal-insulator contacts, linear relationships were found between charge density of polymer charging and metal work functions [28][29][30] and this was presented as evidence for an electron exchange mechanism. However, it was later reported 31 that this is not always the case.…”

Section: The Case For Electron Exchangementioning

confidence: 99%

Triboelectric charging of insulating polymers–some new perspectives

Williams¹

2012

AIP Advances

107

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A nanowire based triboelectric nanogenerator for harvesting water wave energy and its applications APL Materials 5, 074104 (2017) Tribolectric charging results from contact between surfaces, but precisely what is meant by each is not defined or understood, as they relate to charging. The recent microscopic evidence that contact charging can result from material transfer provides incentive to examine how contact charging is affected by these two factors. It is suggested that vigorous rubbing or pressing of two polymers results in transfer of deeper layers than would result from light contacts. Different layers can have substantially different compositions because polymers are typically not homogeneous as a function of depth, so contact and surface are related in this way. This could account for charge transfer between identical polymers, especially in asymmetric contacts in which the frictional force on one polymer differs from that on the other, so that material from different depths is transferred. This review outlines the roles of physics, chemistry and surface analysis in sufficient detail to focus on these subjects. It also makes suggestions how these concepts could be applied to some of the current leading edge research in this area.

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Charge generation on dielectric surfaces

Cited by 535 publications

References 5 publications

Fast soliton-like charge pulses in insulating polymers

Fast soliton-like charge pulses in insulating polymers

Applications of Electrified Dust and Dust Devil Electrodynamics to Martian Atmospheric Electricity

Triboelectric charging of insulating polymers–some new perspectives

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