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Capacitive-type counter of nanoparticles in air
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Design of the condensation particle chamber and the position of the sensor. Selection of nanoparticles by size is previously achieved by DMA. (b) The sensor with two parallel electrodes and droplets encapsulating nanoparticles. Bottom electrode is sputtered on the glass surface.

Image of FIG. 2.
FIG. 2.

The capacitor on the TO-39 housing, 7 mm in diameter: (a) An optical micrograph of the sputtered lower Au/Cr electrode with two wires in electric contact with the pins. The circular electrode of the capacitor is in the central part; (b) Optical micrograph of an impacted area after 20 h of testing revealing an efficient self-cleaning; (c) Optical micrograph with TEM grid put on the sputtered electrode; (d) Typical experimentally obtained signals with an air flow rate of .

Image of FIG. 3.
FIG. 3.

Simulated and detected hits of water droplets: Simulated signal and its derivation at three positions of the droplet: 1, 2, and 4 show the state before and after transient phenomena, while position 3 shows the maximum crater diameter with the extreme capacitance change.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Capacitive-type counter of nanoparticles in air