Shaping Metallic Nanolattices: Design by Microcontact Printing from Wrinkled Stamps
| Autor: | Marcel Sperling, Alexander Böker, Martin Reifarth, Xuepu Wang |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 2020 |
| Předmět: |
Fabrication
Materials science Polydimethylsiloxane Nanoparticle Nanotechnology 02 engineering and technology General Chemistry Substrate (printing) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Biomaterials chemistry.chemical_compound chemistry Colloidal gold Microcontact printing Particle General Materials Science 0210 nano-technology Lithography Biotechnology |
| Zdroj: | Small |
| ISSN: | 1613-6810 |
| DOI: | 10.1002/smll.201906721 |
| Popis: | A method for the fabrication of well‐defined metallic nanostructures is presented here in a simple and straightforward fashion. As an alternative to lithographic techniques, this routine employs microcontact printing utilizing wrinkled stamps, which are prepared from polydimethylsiloxane (PDMS), and includes the formation of hydrophobic stripe patterns on a substrate via the transfer of oligomeric PDMS. Subsequent backfilling of the interspaces between these stripes with a hydroxyl‐functional poly(2‐vinyl pyridine) then provides the basic pattern for the deposition of citrate‐stabilized gold nanoparticles promoted by electrostatic interaction. The resulting metallic nanostripes can be further customized by peeling off particles in a second microcontact printing step, which employs poly(ethylene imine) surface‐decorated wrinkled stamps, to form nanolattices. Due to the independent adjustability of the period dimensions of the wrinkled stamps and stamp orientation with respect to the substrate, particle arrays on the (sub)micro‐scale with various kinds of geometries are accessible in a straightforward fashion. This work provides an alternative, cost‐effective, and scalable surface‐patterning technique to fabricate nanolattice structures applicable to multiple types of functional nanoparticles. Being a top‐down method, this process could be readily implemented into, e.g., the fabrication of optical and sensing devices on a large scale. |
| Databáze: | OpenAIRE |
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