Related Experiment Video
Updated: May 14, 2026
05:04
Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection
Published on: June 13, 2023
High throughput-per-footprint inertial focusing
Ata Tuna Ciftlik1, Maxime Ettori, Martin A M Gijs
1Laboratory of Microsystems 2, Ecole Polytechnqiue Federale de Lausanne-EPFL, CH-1015 Lausanne, Switzerland.
Small (Weinheim an Der Bergstrasse, Germany)
|February 20, 2013
Summary
Researchers achieved high throughput-per-footprint (TPFP) using inertial particle focusing in microfluidics. This breakthrough enables cost-effective, miniaturized flow cytometry devices integrated with microelectronics.
Area of Science:
- Microfluidics
- Biomedical Engineering
- Electrical Engineering
Background:
- Monolithic integration of microfluidic systems with microelectronics is challenging.
- Current microfluidic footprints limit integration and throughput, especially for applications like flow cytometry.
- Inertial particle focusing offers potential for miniaturization but faces scaling limitations.
Purpose of the Study:
- To explore the scaling limits of throughput-per-footprint (TPFP) for inertial particle focusing.
- To investigate the impact of channel geometry and flow conditions on TPFP.
- To enable cost-effective, monolithically integrated microfluidic devices without compromising performance.
Main Methods:
- Theoretical analysis of inertial focusing.
- Experimental study of high Reynolds number (up to 1500) flow in rectangular microchannels.
- Evaluation of entry length and pressure resistance for laminar flow development.
- Fabrication of high aspect-ratio channels compatible with post-CMOS processes.
Main Results:
- Demonstrated inertial particle focusing with a TPFP up to 0.3 L/(min cm²).
- Achieved at least a 100-fold improvement in TPFP compared to previous methods.
- Utilized high aspect-ratio rectangular microfluidic channels suitable for integration.
- Validated the interplay between theory, Reynolds number, entry length, and pressure.
Conclusions:
- High TPFP inertial focusing is achievable in readily fabricated microchannels.
- This technique enables cost-effective, monolithically integrated flow cytometry.
- The methodology facilitates miniaturization of various microfluidic applications requiring electronic integration.
