Water-assisted CO2laser ablated glass and modified thermal bonding for capillary-driven bio-fluidic application

C. K. Chung, H. C. Chang, T. R. Shih, S. L. Lin, E. J. Hsiao, Y. S. Chen, E. C. Chang, C. C. Chen, C. C. Lin

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The glass-based microfluidic chip has widely been applied to the lab-on-a-chip for clotting tests. Here, we have demonstrated a capillary driven flow chip using the water-assisted CO2laser ablation for crackless fluidic channels and holes as well as the modified lowtemperature glass bonding with assistance of adhesive polymer film at 300°C. Effect of water depth on the laser ablation of glass quality was investigated. The surface hydrophilic property of glass and polymer film was measured by static contact angle method for hydrophilicity examination in comparison with the conventional polydimethylsiloxane (PDMS) material. Both low-viscosity deionized water and high-viscosity whole blood were used for testing the capillary-driving flow behavior. The preliminary coagulation testing in the Y-channel chip was also performed using whole blood and CaCl2solution. The water-assisted CO2laser processing can cool down glass during ablation for less temperature gradient to eliminate the crack. The modified glass bonding can simplify the conventional complex fabrication procedure of glass chips, such as high-temperature bonding, long consuming time and high cost. Moreover, the developed fluidic glass chip has the merit of hydrophilic behavior conquering the problem of traditional hydrophobic recovery of polymer fluidic chips and shows the ability to drive high-viscosity bio-fluids.

Original languageEnglish
Pages (from-to)107-114
Number of pages8
JournalBiomedical Microdevices
Volume12
Issue number1
DOIs
Publication statusPublished - 2010 Feb 1

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Molecular Biology

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