Microfluidic-integrated laser-controlled microactuators with on-chip microscopy imaging functionality

Jae Hee Jung, Chao Han, Seung Ah Lee, Jinho Kim, Changhuei Yang

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The fabrication of a novel microfluidic system, integrated with a set of laser-controlled microactuators on an ePetri on-chip microscopy platform, is presented in this paper. In the fully integrated microfluidic system, a set of novel thermally actuated paraffin-based microactuators, precisely controlled by programmed laser optics, was developed to regulate flow and to provide pumping of liquid solutions without external connections. The microfluidic chip was fabricated on a complementary metal-oxide-semiconductor (CMOS)-imaging sensor chip on an ePetri platform; this configuration provided real-time, wide field-of-view, high-resolution imaging using a sub-pixel sweeping microscopy technique. The system of microactuators, which consisted of microvalves and a micropump, operated well in the microfluidic channel with a focused near-infrared laser beam providing the actuation control. As a demonstration, we used our prototype to assess cell-drug interactions and to monitor cell growth directly within an incubator in real time. The powerful combination of laser-actuated microfluidics and chip-scale microscopy techniques represents a significant step forward in terms of a simple, robust, high-throughput, and highly compact analysis system for biomedical and bioscience applications.

Original languageEnglish
Pages (from-to)3781-3789
Number of pages9
JournalLab on a chip
Issue number19
Publication statusPublished - 2014

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biochemistry
  • Chemistry(all)
  • Biomedical Engineering


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