Capillary-driven self-assembly of microchips on oleophilic/oleophobic patterned surface using adhesive droplet in ambient air

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
School of Electrical Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2011
Major/Subject
Mcode
Degree programme
Language
en
Pages
034104/1-3
Series
Applied Physics Letters, Volume 99, Issue 3
Abstract
This letter describes a capillary-driven self-assembly technique using oleophilic/oleophobic patternedsurface and adhesive in ambient air environment. We use a topographical microstructure of porous ormocer functionalized with a fluorinated trichlorosilane for the oleophobic area and goldpatterns for the oleophilic area. The resulted oleophilic/oleophobic patterns show significant wettability contrast for adhesive (Delo 18507), with a contact angle of 119° on oleophobic part and 53° on the oleophilic part. Self-alignment of SU-8 microchips on the oleophilic/oleophobic patterns has been demonstrated. The results provide a promising solution for self-alignment of microparts using commercial adhesives in ambient air environment.
Description
Keywords
adhesion, surface patterning, fluid drops, gold, liquid surfaces
Other note
Citation
Chang, Bo & Sariola, Veikko & Aura, Susanna & Ras, Robin H. A. & Klonner, Maria & Lipsanen, Harri & Zhou, Quan. 2011. Capillary-driven self-assembly of microchips on oleophilic/oleophobic patterned surface using adhesive droplet in ambient air. Applied Physics Letters. Volume 99, Issue 3. P. 034104/1-3. ISSN 0003-6951 (printed). DOI: 10.1063/1.3615053.