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Solvent immersion imprint lithography.

A E Vasdekis1, M J Wilkins, J W Grate

  • 1Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, USA. andreas.vasdekis@pnnl.gov.

Lab on a Chip
|May 3, 2014
PubMed
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Solvent Immersion Imprint Lithography (SIIL) enables deep feature imprinting and 3D polymer functionalization. This novel technique simplifies microsystem prototyping for applications like microfluidics and biosensors.

Area of Science:

  • Materials Science
  • Microtechnology
  • Polymer Chemistry

Background:

  • Existing solvent-based methods struggle with imprinting deep features (1-100 μm) and controlled 3D chemical functionalization of polymers.
  • Microsystem prototyping requires advanced techniques for creating complex structures and tailored surface properties.

Purpose of the Study:

  • To introduce and validate Solvent Immersion Imprint Lithography (SIIL) for polymer functionalization and microsystem prototyping.
  • To demonstrate SIIL's capability for imprinting deep features and achieving controlled 3D chemical moiety distribution.
  • To showcase SIIL's application in developing microfluidic devices with integrated sensors and microbioreactors.

Main Methods:

  • Experimental and computational analysis of polymer immersion in common solvents.

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  • Development of microfluidic devices including 3D oxygen sensors and microbioreactors.
  • Application of SIIL to polystyrene (PS) and other soluble polymers.

    • Main Results:

    • SIIL successfully imprinted and bonded deep features in the 1 to 100 μm range.
    • A well-controlled, 3D distribution of chemical moieties was achieved for polymer functionalization.
    • Validated microfluidic devices for quantitative metabolic studies of microbial cultures were fabricated.

    Conclusions:

    • SIIL is a versatile and efficient technique for advanced polymer functionalization and microsystem prototyping.
    • The method requires no specialized instrumentation and has processing times under two minutes.
    • SIIL is applicable to a wide range of soluble polymers, including inorganic ones.