Dynamic perspective on the function of thermoresponsive nanopores from in situ AFM and ATR-IR investigations

Ana Maria Popa, Silvia Angeloni, Thomas Bürgi, Jeffrey A. Hubbell, Harry Heinzelmann, Raphaël Pugin

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)15356-15365
Number of pages10
JournalLangmuir
Volume26
Issue number19
DOIs
StatePublished - Oct 5 2010
Externally publishedYes

Fingerprint

Nanopores
Silicon
Amides
atomic force microscopy
amides
silicon
Polymerization
stimuli
Polymers
polymerization
Fabrication
fabrication
epoxy compounds
Epoxy Compounds
Chemical modification
brushes
polymers
Fourier Transform Infrared Spectroscopy
Brushes
closing

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy
  • Medicine(all)

Cite this

Popa, A. M., Angeloni, S., Bürgi, T., Hubbell, J. A., Heinzelmann, H., & Pugin, R. (2010). Dynamic perspective on the function of thermoresponsive nanopores from in situ AFM and ATR-IR investigations. Langmuir, 26(19), 15356-15365. https://doi.org/10.101/la102611k

Dynamic perspective on the function of thermoresponsive nanopores from in situ AFM and ATR-IR investigations. / Popa, Ana Maria; Angeloni, Silvia; Bürgi, Thomas; Hubbell, Jeffrey A.; Heinzelmann, Harry; Pugin, Raphaël.

In: Langmuir, Vol. 26, No. 19, 05.10.2010, p. 15356-15365.

Research output: Contribution to journalArticle

Popa, AM, Angeloni, S, Bürgi, T, Hubbell, JA, Heinzelmann, H & Pugin, R 2010, 'Dynamic perspective on the function of thermoresponsive nanopores from in situ AFM and ATR-IR investigations', Langmuir, vol. 26, no. 19, pp. 15356-15365. https://doi.org/10.101/la102611k
Popa AM, Angeloni S, Bürgi T, Hubbell JA, Heinzelmann H, Pugin R. Dynamic perspective on the function of thermoresponsive nanopores from in situ AFM and ATR-IR investigations. Langmuir. 2010 Oct 5;26(19):15356-15365. https://doi.org/10.101/la102611k
Popa, Ana Maria ; Angeloni, Silvia ; Bürgi, Thomas ; Hubbell, Jeffrey A. ; Heinzelmann, Harry ; Pugin, Raphaël. / Dynamic perspective on the function of thermoresponsive nanopores from in situ AFM and ATR-IR investigations. In: Langmuir. 2010 ; Vol. 26, No. 19. pp. 15356-15365.
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