Oscillatory motion of water droplets in kerosene above co-planar electrodes in microfluidic chips

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F14%3A43897817" target="_blank" >RIV/60461373:22340/14:43897817 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23640/14:43922269

Výsledek na webu

<a href="http://scitation.aip.org/content/aip/journal/adva/4/6/10.1063/1.4881675" target="_blank" >http://scitation.aip.org/content/aip/journal/adva/4/6/10.1063/1.4881675</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4881675" target="_blank" >10.1063/1.4881675</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Oscillatory motion of water droplets in kerosene above co-planar electrodes in microfluidic chips

Popis výsledku v původním jazyce

We experimentally observed oscillatory motion of water droplets in microfluidic systems with coplanar microelectrodes under imposed DC electric fields. Two-electrode arrangement with no bipolar electrode and eight-electrode arrangement with six bipolar microelectrodes were investigated. Kerosene was used as the continuous phase. We studied the dependences of the oscillation frequency on the electric field intensity and ionic strength of the water phase. We found that the electric field dependence is strongly nonlinear and discussed possible reasons of this phenomenon, e. g., the droplet deformation at electrode edges that affects the charge transfer between the electrode and droplet or the interplay between the Coulomb force on free charge and the dielectrophoretic force. Our experiments further revealed that the oscillation frequency decreases with growing salt concentration in the two-electrode arrangement, but increases in the eight-electrode arrangement, which was attributed to sur

Název v anglickém jazyce

Oscillatory motion of water droplets in kerosene above co-planar electrodes in microfluidic chips

Popis výsledku anglicky

We experimentally observed oscillatory motion of water droplets in microfluidic systems with coplanar microelectrodes under imposed DC electric fields. Two-electrode arrangement with no bipolar electrode and eight-electrode arrangement with six bipolar microelectrodes were investigated. Kerosene was used as the continuous phase. We studied the dependences of the oscillation frequency on the electric field intensity and ionic strength of the water phase. We found that the electric field dependence is strongly nonlinear and discussed possible reasons of this phenomenon, e. g., the droplet deformation at electrode edges that affects the charge transfer between the electrode and droplet or the interplay between the Coulomb force on free charge and the dielectrophoretic force. Our experiments further revealed that the oscillation frequency decreases with growing salt concentration in the two-electrode arrangement, but increases in the eight-electrode arrangement, which was attributed to sur

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

AIP Advances

ISSN

2158-3226

e-ISSN

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Svazek periodika

4

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

"067103-1"-"067103-14"

Kód UT WoS článku

000338995700004

EID výsledku v databázi Scopus

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