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High-temperature melt stamping of polymers using polymer/nanoporous gold composite stamps
Citation Link: https://doi.org/10.15480/882.13384
Publikationstyp
Journal Article
Date Issued
2024-06-26
Sprache
English
Author(s)
Periz, Ruža
Geuß, Markus
Markmann, Jürgen
TORE-DOI
Journal
Volume
20
Issue
26
Article Number
2308478
Citation
Small 20 (26): 2308478 (2024-06-26)
Publisher DOI
Scopus ID
Publisher
Wiley
Parallel lithographic deposition of polymers onto counterpart substrates is a widely applied surface manufacturing operation. However, polymers may only be soluble in organic solvents or are insoluble at all. Solvent evaporation during stamping may trigger hardly controllable capillarity-driven flow processes or phase separation, and polymer solutions may spread on the counterpart substrates. Solvent-free stamping of melts prevents these drawbacks. Here, a stamp design for the deposition of melts is devised, which intrinsically circumvents ink depletion. The stamps’ topographically patterned contact surfaces with protruding contact elements contacting the counterpart substrates consist of a nanoporous gold layer with a thickness of a few micrometers. The nanoporous gold layer is attached to a molten polymer layer, which is support for the nanoporous gold layer and ink reservoir at the same time. The nanoporous gold layer in turn stabilizes the topography of the stamps’ contact surfaces. As examples, arrays of submicron microdots of polystyrene and poly(vinylidenefluoride-trifluoroethylene) (PVDF-TrFE) are manufactured. The P(VDF-TrFE) microdots are partially crystalline, ferroelectric, and can be locally poled. It is envisioned that the methodology reported here can be automatized and may be extended to functional low-molecular-mass compounds, such as active pharmaceutical ingredients.
Subjects
ferroelectric microstructures
microcontact printing
nanoporous gold
polymer microdots
surface patterning
DDC Class
660.6: Biotechnology
Publication version
publishedVersion
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Name
Small - 2024 - Periz - High‐Temperature Melt Stamping of Polymers Using Polymer Nanoporous Gold Composite Stamps.pdf
Type
Main Article
Size
3.22 MB
Format
Adobe PDF