Surface effects at polymeric interfaces in capillary driving process

Ilenia Viola, Anna Zocco, Alessandra Fischetti, Barbara Foglieni, Laura Cremonesi, Maurizio Ferrari, Roberto Cingolani, Giuseppe Gigli

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The growing interest in biological micro-array and Lab-on-Chip (LOC) is justified by the possibility of reducing the sample volume, processing time and costs. By means microfluidics seems to be the prevalent tool for the integration of manifold processes in miniaturized devices. Anyway at a submillimeter scale the liquid behavior is affected by geometric confinement and wetting properties. In order to confine the liquid sample inside the LOC buried channels we have performed the sealing by poly(dimethylsiloxane) (PDMS), a silicon-based bi-component elastomer. The filling dynamics changes at changing of the polymer mixing ratio of the pre-polymer and the curing agent. In fact, a different concentration of cross-linker modifies the elastic, adhesion and wettability properties of the cover-slip.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsC. Cane, J.-C. Chiao, F.V. Verdu
Number of pages10
Publication statusPublished - 2005
EventSmart Sensors, Actuators, and MEMS II - Seville, Spain
Duration: May 9 2005May 11 2005


OtherSmart Sensors, Actuators, and MEMS II


  • Confined geometry
  • DNA-chip
  • Liquid displacement
  • PDMS
  • Wetting properties

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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