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

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Abstract

This letter reports water droplet 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.

Details

Original languageEnglish
Article number114105
Pages (from-to)1-5
Number of pages5
JournalApplied Physics Letters
Volume101
Issue number11
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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