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Novel ultrathin poly(ethylene glycol) films as flexible platform for biological applications and plasmonics

We present a novel approach to prepare ultrathin, biocompatible films based on cross-linking of multi-functionalized, star-branched poly(ethylene glycols) (STAR-PEGs) with tunable film thicknesses of 4-200 nm. A two-component mixture of amine- and epoxy-terminated four-arm STAR-PEGs (MN = 2000 g/mol...

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Bibliographic Details
Main Authors: Meyerbröker, Nikolaus (Author) , Kriesche, Thomas (Author) , Zharnikov, Michael (Author)
Format: Article (Journal)
Language:English
Published: March 13, 2013
In: ACS applied materials & interfaces
Year: 2013, Volume: 5, Issue: 7, Pages: 2641-2649
ISSN:1944-8252
DOI:10.1021/am400065f
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/am400065f
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Author Notes:Nikolaus Meyerbröker, Thomas Kriesche, and Michael Zharnikov
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Summary:We present a novel approach to prepare ultrathin, biocompatible films based on cross-linking of multi-functionalized, star-branched poly(ethylene glycols) (STAR-PEGs) with tunable film thicknesses of 4-200 nm. A two-component mixture of amine- and epoxy-terminated four-arm STAR-PEGs (MN = 2000 g/mol) was spin-coated on a flat substrate. Gentle heating induced an extensive chemical cross-linking of the macromonomers, resulting in a stable, hydrogel-like film with a density close to that of bulk PEG material. The cross-linking process could be monitored in situ, exhibiting the expected kinetics. The films revealed pronounced swelling behavior, which was fully reversible and could be precisely controlled. Additionally, they provided a high affinity to citrate-stabilized gold nanoparticles (AuNP) that could be adsorbed with high densities into the PEG matrix from an aqueous solution. These novel PEG/AuNP composite films offer interesting and potentially useful optical properties. The adsorption could also be performed in a lithographic fashion, resulting in AuNP patterns imbedded into the PEG matrix.
Item Description:Gesehen am 21.05.2021
Physical Description:Online Resource
ISSN:1944-8252
DOI:10.1021/am400065f

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