A novel miniature gas ionization sensor based on freestanding gold nanowires

Sadeghian, Ramin Banan; Kahrizi, Mojtaba

doi:10.1016/j.sna.2007.03.010

Cited by 81 publications

(50 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their high aspect ratio and sharp tips enhance the electric field locally around the tips and this accelerates the breakdown process due to creation of a corona or conducting filament of highly ionized gas around the tips. The gap between electrodes is bridged by a powerful electron avalanche (promoted by corona), and a selfsustaining interelectrode discharge will be formed at a lower voltage compared to parallel plate capacitors [1][2][3][4][5]. Applied electric field, E app , in a parallel-plate capacitor is uniform in the gap between the plates, but if one of the electrodes is replaced by a protruded surface such as metallic nanowires/nanorods, locally high electric field will be formed at the tip of each structure caused by field enhancement effect [1].…”

Section: The Device Model and Sensor Structurementioning

confidence: 99%

“…1. The detail structure and fabrication of the sensor based on gold nanowires were previously reported [1][2][3][4][5].…”

Section: The Device Model and Sensor Structurementioning

confidence: 99%

“…The preliminary results of the design and characteristics of the device is reported previously [1][2]. To optimize the structure and functionality of the device in terms of sensitivity, selectivity and to determine the breakdown voltages of gases prior to fabrication of the sensor we have developed a simulation tool to model and design this miniaturized gas sensor.…”

Section: Introductionsmentioning

confidence: 99%

See 2 more Smart Citations

Design, modeling and simulation of a miniaturized gas ionization sensor: Optimization of the structure and operation

Chivu

Kahrizi

2012

2012 IEEE International Conference on Industrial Technology

View full text Add to dashboard Cite

Gas ionization sensor (GIS), made of two parallel plates, works on measuring the breakdown voltage of gases that is unique for each gas. The gas breakdown inside the gas chamber occurs due to the ionization of gas molecules by accelerated electron impacts. The acceleration of electrons is very depended on the effective electric field they experience. It is shown that metallic or semiconductor nanowires grown between the two plates improve the sensitivity of the device and breakdown voltages of the gases are considerably reduced. In this work we report the design, modeling, and simulation of a miniaturized GIS based on nanowires. We have developed simulating software based on an open source simulator XOOPIC. The simulation tool is based on combined Particle-In-Cell and Monte-Carlo-Collision approaches. The tool is developed to model and simulate the gas ionization sensor to detect various gases including greenhouse gases with optimized breakdown voltages.

show abstract

Section: The Device Model and Sensor Structurementioning

confidence: 99%

“…1. The detail structure and fabrication of the sensor based on gold nanowires were previously reported [1][2][3][4][5].…”

Section: The Device Model and Sensor Structurementioning

confidence: 99%

Section: Introductionsmentioning

confidence: 99%

See 1 more Smart Citation

Design, modeling and simulation of a miniaturized gas ionization sensor: Optimization of the structure and operation

Chivu

Kahrizi

2012

2012 IEEE International Conference on Industrial Technology

View full text Add to dashboard Cite

show abstract

“…Additionally the surface of one or both electrodes can be modified to locally enhance the field strength, e.g. by 1D-nanostructures such as carbon nanotubes (CNTs) [1][2][3][4][5][6], ZnO or Au nanowires [7][8][9]. These nanostructures can significantly improve the sensor performance, but there are also a few drawbacks.…”

Section: Introductionmentioning

confidence: 99%

MEMS gas ionization sensor with palladium nanostructures for use at ambient pressure

Müller

Mehner

Hoffmann

2016

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

“…The preliminary results and fabrication of the sensor based on gold nanowires (AuNWs) were reported earlier. (11,12) In this paper, we report on the operation of the device, particularly in subtorr pressures. Because there is a general lack of analysis and numerical simulation in the literature, on the breakdown process in these types of sensor, we have developed a simulation model for the device.…”

Section: Introductionmentioning

confidence: 99%

Subtorr Operation of a Miniature Gas Ionization Sensor Based on Gold Nanowires

2009

Sensors and Materials

View full text Add to dashboard Cite

Vertically aligned freestanding gold nanowires (AuNWs) were synthesized and deposited on one of the electrodes of a capacitor-like gas ionization cell, whereas the counterelectrode was a polished silicon wafer coated with aluminum on both sides. The field enhancement property of high-aspect-ratio AuNWs was employed to reduce the gaseous breakdown voltage (V b ) at room temperature. The device was characterized in low-pressure air, and tested in subtorr argon where it demonstrated a considerable reduction in V b compared with uniform field conditions and with its earlier counterparts. The dependences of V b and prebreakdown currents on the polarity of applied voltage were studied. A particle-in-cell/Monte-Carlo-collision (PIC/MCC) model for the device was also developed to simulate the breakdown process within the same pressure range in which measurements were carried out. The simulated V b -P curve showed good agreement with the measured characteristics.

show abstract

A novel miniature gas ionization sensor based on freestanding gold nanowires

Cited by 81 publications

References 15 publications

Design, modeling and simulation of a miniaturized gas ionization sensor: Optimization of the structure and operation

Design, modeling and simulation of a miniaturized gas ionization sensor: Optimization of the structure and operation

MEMS gas ionization sensor with palladium nanostructures for use at ambient pressure

Subtorr Operation of a Miniature Gas Ionization Sensor Based on Gold Nanowires

Contact Info

Product

Resources

About