Field emission current and vacuum breakdown by a pointed cathode

Hirata, Yoshihiro; Ozaki, Kimihiro; Ikeda, U.; Mizoshiri, Mizue

doi:10.1016/j.tsf.2006.02.085

Cited by 30 publications

(23 citation statements)

References 4 publications

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“…a = 0.25 and q = 0.4. In applications of nanoscale Paul trap, prevention of the electric breakdown is an additional constraint to the applied voltages, and this certainly depends on the trap dimensions (Hirata et al, 2007).…”

Section: Simulation Methodsmentioning

confidence: 99%

A molecular dynamics simulation study on trapping ions in a nanoscale Paul trap

Zhao

Krstić

2008

Nanotechnology

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We found by molecular dynamics simulations that a low energy ion can be trapped effectively in a nanoscale Paul trap in both vacuum and aqueous environment when appropriate AC/DC electric fields are applied to the system. Using the negatively charged chlorine ion as an example, we show that the trapped ion oscillates around the center of the nanotrap with the amplitude dependent on the parameters of the system and applied voltages. Successful trapping of the ion within nanoseconds requires electric bias of GHz frequency, in the range of hundreds of mV. The oscillations are damped in the aqueous environment, but polarization of water molecules requires application of higher voltage biases to reach improved stability of the trapping. Application of a supplemental DC driving field along the trap axis can effectively drive the ion off the trap center and out of the trap, opening a possibility of studying DNA and other charged molecules using embedded probes while achieving a full control of their translocation and localization in the trap.

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Section: Simulation Methodsmentioning

confidence: 99%

A molecular dynamics simulation study on trapping ions in a nanoscale Paul trap

Zhao

Krstić

2008

Nanotechnology

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“…To get rid of the influence of the surface conditions, an electrochemical corrosion process and a melting process were employed to fabricate the tungsten electrodes. Firstly, the tip of the tungsten needle was sharpened by the electrochemical corrosion in the 10% NaOH solution [1]. After that, the tungsten tips were finished with the radius in the range of 50nm to 200nm in Fig.…”

Section: A Electrode Fabricationmentioning

confidence: 99%

“…To the best knowledge of the authors, there are mainly two experimental techniques for the electrical breakdown between nanometer gaps by far. The first technique is achieving accurate adjustment and observation of nanometer separation through a scanning electron microscope (SEM) and piezoelectric displacement devices mentioned in the research of Y. Hirata et al from Osaka University of Japan [1]. They experimentally studied the vacuum breakdown across the very small gap ranging from 30 nm to 2 μm between a pointed cathode of thin tungsten wires and a plane anode of stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Discharge behaviors of electrical breakdown across nanometer vacuum gaps

Meng

Cheng

Chen

et al. 2013

2013 IEEE International Conference on Solid Dielectrics (ICSD)

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Micro-electro-mechanical systems (MEMS) andNano-electro-mechanical systems (NEMS) are emerging technologies that uses tools and techniques in the microelectronics industry to build microscopic machines. Electrostatic force is often employed to drive the motion components in MEMS and NEMS devices, which could cause extremely high electric field (more than 10 8 V/m) between two metal conductors. However, the high field intensity may result in electrical breakdown across the conductors in case of improper operations or overvoltage. Therefore, this paper presented a novel experimental technique to study the discharge behaviors across nanometer gaps between 20 nm and 300 nm. The influence of gap separations on breakdown characteristics and the voltage contrast effect in the gap spacing were both investigated. Results showed that the field electron emission did not play a dominate role in the electrical breakdown process across nanometer gaps, which was different from the classical theory of vacuum breakdown, and the breakdown voltage increased as the increase of gap separations. Besides, the voltage contrast effect in the gap spacing was also observed through the scanning electron microscope, which was related to the electric field intensity.

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“…It is well known that electron emission from cathode increases with increase of field strength at the electrode surface [4][5][6][9][10][11]. Figure 7 shows the electrode shape which is simplified to calculate the field strength.…”

Section: Influence Of the Electrode Tip Shape On DC Electric Dischargementioning

confidence: 99%

“…Those electrons heat the anode surface due to condensation from free space. The vacuum discharge process could form a melt spot of several micrometers at the anode surface [4][5][6]. However, it seems not to be the proper process for practical application to the relevant manufacturing fields described above.…”

Section: Introductionmentioning

confidence: 99%

Development of controlled micro-discharge at the atmospheric pressure

2013

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The generation method of sub-millimeter sized plasma was developed through controlling the electrical discharge in the range from glow to arc discharge with use of the experimental torch device and the newly designed high-voltage power source. The electrical discharge was established between a cathode of the electrolytic polished tungsten electrode and an anode of stainless steel sheet. Features of the thermal materials processing by micro-discharge were experimentally investigated. It is shown that the power density of micro-discharge reaches higher than 10 9 W/m 2 and sub-millimeter sized melt spot can be obtained at the surface of anode metal.

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Field emission current and vacuum breakdown by a pointed cathode

Cited by 30 publications

References 4 publications

A molecular dynamics simulation study on trapping ions in a nanoscale Paul trap

A molecular dynamics simulation study on trapping ions in a nanoscale Paul trap

Discharge behaviors of electrical breakdown across nanometer vacuum gaps

Development of controlled micro-discharge at the atmospheric pressure

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