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Updated: May 20, 2026

Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment

Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment

Published on: November 9, 2015

Forced wetting of a reactive surface.

¹Laboratory of Surface and Interfacial Physics, University of Mons, 7000 Mons, Belgium. terrydblake@btinternet.com

Advances in Colloid and Interface Science

|July 20, 2012

Summary

This summary is machine-generated.

Dynamic wetting of gelatin-coated PET shows a smooth transition due to surface transformation, unlike unmodified PET

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Area of Science:

Surface Science
Materials Science
Physical Chemistry

Background:

Dynamic wetting investigates liquid behavior on surfaces at varying speeds.
Unmodified poly(ethylene terephthalate) (PET) exhibits complex wetting dynamics.
Gelatin-coated PET (GC-PET) presents a unique substrate for wetting studies.

Purpose of the Study:

To investigate the dynamic wetting of water on GC-PET across a wide speed range.
To compare the wetting behavior of GC-PET with unmodified PET.
To analyze dynamic wetting using the molecular-kinetic theory (MKT).

Main Methods:

Forced wetting experiments were conducted on GC-PET.
Dynamic wetting data was analyzed using the molecular-kinetic theory (MKT).
Results were compared with previously obtained data for unmodified PET.

Main Results:

Both GC-PET and PET displayed distinct low- and high-speed wetting modes.
GC-PET showed a smooth transition attributed to a hydrophobic-to-hydrophilic surface transformation.
PET exhibited a discontinuous transition linked to surface heterogeneity and masked polar sites at higher speeds.

Conclusions:

Forced wetting combined with MKT effectively reveals subtle wetting process details.
Physicochemical surface transformations significantly influence dynamic wetting behavior.
Dynamic wetting studies offer greater insight than spontaneous wetting for such systems.