Nanostructured Submicron Block Copolymer Dots by Sacrificial Stamping: A Potential Preconcentration Platform for Locally Resolved Sensing, Chemistry, and Cellular Interactions

Autor(en): Hou, Peilong
Han, Weijia
Philippi, Michael
Schaefer, Helmut
Steinhart, Martin 
Stichwörter: block copolymers; GLASS; LITHOGRAPHY; Materials Science; Materials Science, Multidisciplinary; MICROCRYSTALS; MORPHOLOGY; NANOLITHOGRAPHY; NANOPARTICLES; nanopores; Nanoscience & Nanotechnology; patterning; POLYSTYRENE; Science & Technology - Other Topics; SIZE; stamping; SURFACE; surfaces; TIRFM
Erscheinungsdatum: 2018
Volumen: 1
Ausgabe: 3
Startseite: 1413
Seitenende: 1419
Classical contact lithography involves patterning of surfaces by embossing or by transfer of ink. We report direct lithographic transfer of parts of sacrificial stamps onto counter-part surfaces. Using sacrificial stamps consisting of the block copolymer polystyrene-block-poly(2-pyridine) (PS-b-P2VP), we deposited arrays of nanostructured submicron PS-b-P2VP dots with heights of similar to 100 nm onto silicon wafers and glass slides. The sacrificial PS-b-P2VP stamps were topographically patterned with truncated-pyramidal contact elements and penetrated by spongy-continuous nanopore systems. The spongy nature of the sacrificial PS-b-P2VP stamps supported formation of adhesive contact to the counterpart surfaces and the rupture of the contact elements during stamp retraction. The submicron PS-b-P2VP dots generated by sacrificial stamping can be further functionalized; examples include loading submicron PS-b-P2VP dots with dyes and attachment of gold nanoparticles to their outer surfaces. The arrays of submicron PS-b-P2VP dots can be integrated into setups for advanced optical microscopy, total internal reflection fluorescence microscopy, or Raman microscopy. Arrays of nanostructured submicron block copolymer dots may represent a preconcentration platform for locally resolved sensing and locally resolved monitoring of cellular interactions or might be used as microreactor arrays in lab-on-chip configurations.
ISSN: 25740970
DOI: 10.1021/acsanm.8b00254

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