Dynamic perspective on the function of thermoresponsive nanopores from in situ AFM and ATR-IR investigations
This article describes the morphological and chemical characterization of stimuli-responsive functionalized silicon surfaces provided in parallel by atomic force spectroscopy (AFM) and Fourier transform infrared spectroscopy (FT-IR) enhanced by the single-beam sample reference attenuated total refle...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
7 September 2010
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| In: |
Langmuir
Year: 2010, Jahrgang: 26, Heft: 19, Pages: 15356-15365 |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/la102611k |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/la102611k
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| Verfasserangaben: | Ana Maria Popa, Silvia Angeloni, Thomas Bürgi, Jeffrey A. Hubbell, Harry Heinzelmann, and Raphaël Pugin |
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| 520 | |a This article describes the morphological and chemical characterization of stimuli-responsive functionalized silicon surfaces provided in parallel by atomic force spectroscopy (AFM) and Fourier transform infrared spectroscopy (FT-IR) enhanced by the single-beam sample reference attenuated total reflection method (SBSR-ATR). The stimuli-responsive behavior of the surfaces was obtained by grafting-to in melt carboxyl-terminated poly-N-isopropylacryl amides (PNIPAAM) with different degree of polymerization (DP) on epoxide-functionalized silicon substrates. The unprecedented real time and in situ physicochemical insight into the temperature-triggered response of the densely packed superficial brushes allowed for the selection of a PNIPAAM with a specific DP as a suitable polymer for the fabrication of silicon membranes exhibiting switchable nanopores. The fabrication process combines the manufacture of nanoporous silicon surfaces and their subsequent chemical functionalization by the grafting-to in melt of the selected polymer. Then, relevant information was obtained in what concerns the chemical modifications behind the topographical changes that drive the functioning of PNIPAAM-based hybrid nanovalves as well as the timescale on which the opening and closing of the nanopores occur. | ||
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| 700 | 1 | |a Hubbell, Jeffrey A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Heinzelmann, Harry |e VerfasserIn |4 aut | |
| 700 | 1 | |a Pugin, Raphaël |e VerfasserIn |4 aut | |
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