Electric field driven addressing of oil in water droplets in the presence of gradients of ionic and nonionic surfactants

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F15%3A43900203" target="_blank" >RIV/60461373:22340/15:43900203 - isvavai.cz</a>

Výsledek na webu

<a href="http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7356764&punumber%3D7339353%26filter%3DAND%28p_IS_Number%3A7356738%29%26pageNumber%3D2" target="_blank" >http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7356764&punumber%3D7339353%26filter%3DAND%28p_IS_Number%3A7356738%29%26pageNumber%3D2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/IAS.2015.7356764" target="_blank" >10.1109/IAS.2015.7356764</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electric field driven addressing of oil in water droplets in the presence of gradients of ionic and nonionic surfactants

Popis výsledku v původním jazyce

We deal with addressing of dielectric kerosene droplets dispersed in water by DC electric field. Planar microfluidic platform with a central compartment and two electrode chambers was fabricated. The platform enables the formation of concentration gradients of cationic, anionic or nonionic surfactants. We show that a kerosene droplet always moves in the direction from a surfactant reservoir due to the Marangoni phenomenon. The release of ionic surfactants can be well controlled by imposed electric field. Once surfactant molecules reach the surface of water phase, the Marangoni phenomenon pulls the kerosene droplet in the direction from the surfactant reservoir. So the observed mechanism does not rely on the classical electrophoretic migration of charged macroscopic objects - droplets. As the dependence of droplet motion on the absolute value of electric field strength is linear, apparent droplet mobilities were evaluated. Finally we discuss the use of the observed phenomenon for drople

Název v anglickém jazyce

Electric field driven addressing of oil in water droplets in the presence of gradients of ionic and nonionic surfactants

Popis výsledku anglicky

We deal with addressing of dielectric kerosene droplets dispersed in water by DC electric field. Planar microfluidic platform with a central compartment and two electrode chambers was fabricated. The platform enables the formation of concentration gradients of cationic, anionic or nonionic surfactants. We show that a kerosene droplet always moves in the direction from a surfactant reservoir due to the Marangoni phenomenon. The release of ionic surfactants can be well controlled by imposed electric field. Once surfactant molecules reach the surface of water phase, the Marangoni phenomenon pulls the kerosene droplet in the direction from the surfactant reservoir. So the observed mechanism does not rely on the classical electrophoretic migration of charged macroscopic objects - droplets. As the dependence of droplet motion on the absolute value of electric field strength is linear, apparent droplet mobilities were evaluated. Finally we discuss the use of the observed phenomenon for drople

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

—

Projekt

<a href="/cs/project/GA14-01781S" target="_blank" >GA14-01781S: Výzkum mechaniky tekutin v inteligentních mikrosystémech řízených elektrickými poli</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

IEEE Industry Applications Society Annual Meeting

ISBN

978-1-4799-8393-3

ISSN

0197-2618

e-ISSN

—

Počet stran výsledku

7

Strana od-do

1-7

Název nakladatele

IEEE

Místo vydání

New York

Místo konání akce

Addison

Datum konání akce

18. 10. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000370974600026