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Related Concept Videos

iChip01:24

iChip

The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...

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High Throughput Microfluidic Rapid and Low Cost Prototyping Packaging Methods
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Connecting microfluidic chips using a chemically inert, reversible, multichannel chip-to-world-interface.

Elisabeth Wilhelm1, Christiane Neumann, Thomas Duttenhofer

  • 1Karlsruhe Institute of Technology (KIT), Institute of Microstructure Technology (IMT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany. bastian.rapp@kit.edu.

Lab on a Chip
|September 24, 2013
PubMed
Summary

A new reusable Chip-to-World-Interface (CWI) enables contamination-free connections for microfluidic chips. This chemically inert interface supports high flow rates and diverse solvents, advancing microfluidic applications.

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Area of Science:

  • Microfluidics
  • Chemical Engineering
  • Materials Science

Background:

  • Microfluidic devices require robust interfaces for fluidic connections.
  • Existing interfaces can suffer from contamination, dead volume, and material incompatibility.
  • A need exists for versatile, chemically resistant, and high-performance chip-to-world connections.

Purpose of the Study:

  • To present a novel, reusable, and chemically inert multichannel Chip-to-World-Interface (CWI).
  • To demonstrate the CWI's capability for contamination-free fluidic connections in microfluidic systems.
  • To validate the CWI's performance with various microfluidic chip materials and challenging solvents.

Main Methods:

  • The CWI utilizes a force-fit connection principle, similar to HPLC connectors.
  • It accommodates up to 100 thermoplastic tubes connected to microfluidic chips (epoxy, glass, PDMS).
  • Performance was tested for pressure tolerance, flow rates, and chemical resistance with organic solvents like PTFE tubing.

Main Results:

  • The CWI provides contamination-free connections for up to 100 tubes.
  • It is pressure-tight up to 630 kPa (6.3 bar) and supports flow rates exceeding 4 ml/min.
  • The interface demonstrated excellent chemical inertness, allowing continuous use with harsh organic solvents (e.g., dichloromethane, DMF) without damage or leakage.

Conclusions:

  • The developed CWI offers a versatile and reliable solution for fluidic interconnects in microfluidics.
  • Its chemically inert nature and robust design enable the use of a wide range of solvents, expanding microfluidic application possibilities.
  • This interface minimizes dead volume and prevents sample contamination, enhancing experimental accuracy and reproducibility.