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Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
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Published on: November 9, 2015

Wettability increase by "corona" ionization.

Vito Di Virgilio1, Sandra Bermejo, Luis Castañer

  • 1MNT, Department of Electronic Engineering, E.TSE Telecomunicación, Universitat Politècnica de Catalunya, Módul C4 Campus Nord UPC, Jordi Girona 1, Barcelona 08034, Spain. vito.di.virgilio@upc.edu

Langmuir : the ACS Journal of Surfaces and Colloids
|June 30, 2011
PubMed
Summary
This summary is machine-generated.

Corona air ionization enhances surface wettability of hydrophobic materials. This study confirms charge accumulation and shows contact angle increases with humidity, without damaging the PDMS surface.

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Area of Science:

  • Surface Science
  • Materials Science
  • Plasma Physics

Background:

  • Hydrophobic surfaces resist wetting, limiting applications.
  • Corona air ionization is a potential surface modification technique.
  • Understanding charge effects at the solid-liquid interface is crucial.

Purpose of the Study:

  • To investigate the effect of corona air ionization on hydrophobic surface wettability.
  • To confirm charge accumulation at the triple line using photoluminescence.
  • To evaluate the impact of corona exposure on Polydimethylsiloxane (PDMS) and the role of humidity.

Main Methods:

  • Surface treatment using corona air ionization.
  • Contact angle measurements to quantify wettability.
  • Photoluminescence spectroscopy to observe charge accumulation.
  • Experiments conducted under varying humidity conditions.

Main Results:

  • Corona air ionization significantly increased surface wettability.
  • Photoluminescence confirmed charge accumulation at the triple line.
  • Observed contact angles were below theoretical predictions for zero solid-liquid surface tension.
  • PDMS showed no deterioration after corona exposure.
  • Contact angle increased with increasing humidity.

Conclusions:

  • Corona air ionization is an effective method for enhancing hydrophobic surface wettability.
  • Charge accumulation plays a key role in the observed wetting behavior.
  • PDMS is stable under the employed corona treatment conditions.
  • Humidity influences the wetting behavior of corona-treated surfaces.