Current amplification in an electrostatic trap by soot dendrite growth and fragmentation: Application to soot sensors

Bilby, David; Kubinski, David J.; Maricq, M. Matti

doi:10.1016/j.jaerosci.2016.03.003

Cited by 22 publications

(41 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The effect of electrical field-supported soot deposition is well known. Soot particles from exhausts are electrically charged and are be attracted to the electrodes by a potential difference in such setups [ 38 , 39 , 40 , 41 , 42 , 43 ]. Detailed information on the charging of soot particles and electrophoresis are given in [ 50 ].…”

Section: Results and Discussion For Real Exhaust Measurementsmentioning

confidence: 99%

“…Another option is that electrical charges might be induced by the electrical field. Anyway, the soot is accelerated to the sensor’s surface by the Coulomb forces and thus soot collection is enhanced electrophoretically [ 38 , 39 , 40 , 41 , 42 , 43 ]. However, in order to reliably determine particulate mass or particle number, a deeper understanding of the deposition mechanisms on the sensor surface is needed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Conductometric Soot Sensors: Internally Caused Thermophoresis as an Important Undesired Side Effect

Hagen

Spannbauer

Feulner

et al. 2018

Sensors

View full text Add to dashboard Cite

Particulate matter sensors are of interest for application in the exhaust of any combustion processes, especially for automotive aftertreatment systems. Conductometric soot sensors have been serialized recently. They comprise planar interdigital electrodes (IDE) on an insulating substrate. Between the IDEs, a voltage is applied. Soot deposition is accelerated by the resulting electric field due to electrophoresis. With increasing soot deposition, the conductance between the IDE increases. The timely derivative of the conductance can serve as a sensor signal, being a function of the deposition rate. An increasing voltage between the IDE would be useful for detecting low particle exhausts. In the present study, the influence of the applied voltage and the sensor temperature on the soot deposition is investigated. It turned out that the maximum voltage is limited, since the soot film is heated by the resulting current. An internally caused thermophoresis that reduces the rate of soot deposition on the substrate follows. It reduces both the linearity of the response and the sensitivity. These findings may be helpful for the further development of conductometric soot sensors for automotive exhausts, probably also to determine real driving emissions of particulate matter.

show abstract

Section: Results and Discussion For Real Exhaust Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conductometric Soot Sensors: Internally Caused Thermophoresis as an Important Undesired Side Effect

Hagen

Spannbauer

Feulner

et al. 2018

Sensors

View full text Add to dashboard Cite

show abstract

“…이러한 구 조적 특징으로 인해 수지상의 경우 매우 큰 비표면 적을 지니며, 기체 또는 액체의 수송 능력이 뛰어 나다 [5,6]. 구리 수지상 구조는 연료전지 촉매 [7], SERS용 소재 [8], 가스 센서 촉매 [9], 전도성 필러 [10] 등 촉매 분야 및 전기화학적 분야에서 상당한 주목을 받아왔다. 구리 수지상을 형성하려는 합성 방법에는 용액 합성법(solution-phase synthesis), 수 열 합성법, 무전해 도금법 및 전해 도금법 등이 있 다 [11].…”

Section: 서 론unclassified

Effect of Electrolyte Type on Shape and Surface Area Characteristics of Dendritic Cu Powder

Park¹,

Park²,

Kang³

et al. 2016

Journal of the Korean institute of surface engineering

View full text Add to dashboard Cite

We have investigated the effects of applied potential, deposition time and electrolyte types on shapes and physical properties of Cu dendrites by potentiostatic electrodeposition. Finer shape of dendrites was observed at less cathodic potential by 100mV than at the limiting current, due to 'effective overpotential'. The shape of copper dendrite is related to the deposition time, too. The dendrite depositing for 10 min showed the finest shape. The finer dendrite has the less apparent density and the larger specific surface area. Dendrite from chloride solution has the lowest density and the largest surface area among three plating solutions, sulfate, chloride and pyrophosphate.

show abstract

“…Electrophoretic effects have been reported to provide current amplification by Bilby et al [15]. The effect is occurring in an additional vertical electrode arrangement biased at a high voltage (HV).…”

Section: Introductionmentioning

confidence: 99%

Impedance Spectroscopy for Enhanced Data Collection of Conductometric Soot Sensors

Middelburg

Ghaderi

Bilby

et al. 2020

2020 IEEE 29th International Symposium on Industrial Electronics (ISIE)

View full text Add to dashboard Cite

Impedance spectroscopy in the frequency range 100 Hz to 10 kHz has been applied to the Inter-Digitated Electrode (IDE) structure that is conventionally operated as a resistive sensor for the measurement of Particulate Matter (PM). The measurement of both the in-phase (resistive) and out-of-phase (capacitive) components of the impedance over this frequency range provides more data on PM as compared to DC resistance measurement only. Experimental validation confirms a more gradual change in capacitance with soot buildup as compared to the sudden reduction of resistance with dendrite formation. The effect of an additional vertical electric field for an increased capacitive sensitivity due to stimulated soot buildup has been experimentally investigated using the electrically conductive flow housing of the IDE structure as an additional suspended electrode.

show abstract

Current amplification in an electrostatic trap by soot dendrite growth and fragmentation: Application to soot sensors

Cited by 22 publications

References 21 publications

Conductometric Soot Sensors: Internally Caused Thermophoresis as an Important Undesired Side Effect

Conductometric Soot Sensors: Internally Caused Thermophoresis as an Important Undesired Side Effect

Effect of Electrolyte Type on Shape and Surface Area Characteristics of Dendritic Cu Powder

Impedance Spectroscopy for Enhanced Data Collection of Conductometric Soot Sensors

Contact Info

Product

Resources

About