Surface Modification of PDMS Stamps for Microcontact Printing of Polar Inks

Who

IBM from NAPA EU research project

Where

Zurich

How

  • Process: Casting PDMS (silicone) precursor (elastomer base and curing agent) onto a structured template in a Petri dish. Curing (hardening) by heat (60°C, 12-24 h).
  • Application: Microfluidic devices - Photonic crystals
  • Process description: Plasma polymerization of allylamine; a process for surface modification.
  • Purpose: A process is described for surface modification of polydimethylsiloxane (PDMS) stamps and transferring a hydrophilic ink pattern from the modified stamp to various substrates with different chemistry of inks and substrates.
  • Major advantages: In comparison to general oxygen plasma method to treat the stamp surface, plasma polymerization process is efficient, stable and substrate independent, high density of functional groups on the surface, versatile chemical structures, and suitable for further surface modification based on reactive amine groups.

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Microcontact Printing of Alkanethiols on Gold

Who

IBM

Where

Zurich

How

  • Process description: Microcontact printing (μCP, mCP) of alkanethiols on gold
  • Purpose: A process is described for transferring a pattern from a silicon master via an elastomeric stamp onto a solid substrate.
  • Major advantages: In comparison to standard photolithography, microcontact printing is a low-cost,large-area, high-resolution patterning process.
  • Process: Casting PDMS (silicone) precursor (elastomer base and curing agent) onto a structured template in a Petri dish. Curing (hardening) by heat (60°C, 12-24 h).
  • Application: Microfluidic devices - Photonic crystals

Link

Documentation associated

Fabrication of high resolution protein patterns

Who

IBM from NAPA EU research project

Where

Zurich

How

  • Process: Casting PDMS (silicone) precursor (elastomer base and curing agent) onto a structured template in a Petri dish. Curing (hardening) by heat (60°C, 12-24 h).
  • Application: Microfluidic devices - Photonic crystals
  • Process description: Subtractive Printing of High Resolution Protein Nanopatterns
  • Purpose: The Ink-Subtract-Print strategy is described in which an inked elastomer is patterned by subtracting proteins from the surface using a nanotemplate followed by printing from the elastomer to a final substrate.
  • Major advantages: This technique is designed to produce high resolution patterns of single or multiple proteins with intrinsic alignment. Other advantages include: easy to use, high throughput pattern production, large area patterns, and no stamp collapse.

Link

Documentation associated