Surface-tension driven self-assembly of microchips on hydrophobic receptor sites with water using forced wetting

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Journal Title
Journal ISSN
Volume Title
School of Electrical Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2012
Major/Subject
Mcode
Degree programme
Language
en
Pages
114105/1-5
Series
Applied Physics Letters, Volume 101, Issue 11
Abstract
This letter reports waterdroplet self-alignment methods for self-assembly of microchips on hydrophobic receptor sites in ambient air environment. It is an open question if lyophobic receptor site of the self-alignment medium can be used for self-assembly. We investigate this question using both numerical simulation and experimental studies on hydrophobic receptor sites (advancing contact angle of 118°) with superhydrophobic substrate (contact angle of 180°). We demonstrate that self-alignment is possible using two forced wetting methods: (a) introducing an excessive amount of water and (b) applying external pressure. The results suggest that surface-tension driven self-alignment can be applied in a wider combination of materials and mediums.
Description
Keywords
hydrophobic interactions, wetting, hydrophilic interactions, self assembly, fluid drops
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Citation
Chang, Bo & Shah, Ali & Routa, Iiris & Lipsanen, Harri & Zhou, Quan. 2012. Surface-tension driven self-assembly of microchips on hydrophobic receptor sites with water using forced wetting. Applied Physics Letters. Volume 101, Issue 11. P. 114105/1-5. ISSN 0003-6951 (printed). DOI: 10.1063/1.4751980.