Aller au contenu principal
  • Paul Scherrer Institut PSI
  • PSI Research, Labs & User Services

Digital User Office

  • Digital User Office
  • DE
  • EN
  • FR
Paul Scherrer Institut (PSI)
Rechercher
Paul Scherrer Institut (PSI)

Hauptnavigation

  • Research at PSIOuvrir ce point de menu principal
    • Research Initiatives
    • Ethics and Research integrity
    • Scientific Highlights
    • Scientific Events
    • Scientific Career
    • PSI-FELLOW
    • PSI Data Policy
  • Research Divisions and LabsOuvrir ce point de menu principal
    • Overview
    • Research with Neutrons and Muons
    • Photon Science
    • Energy and Environment
    • Nuclear Energy and Safety
    • Biology and Chemistry
    • Scientific Computing, Theory and Data
    • Large Research Facilities
    • Logistics
  • Facilities and InstrumentsOuvrir ce point de menu principal
    • Overview
    • Large Research Facilities
    • Facilities
    • PSI Facility Newsletter
  • PSI User ServicesOuvrir ce point de menu principal
    • User Office
    • Methods at the PSI User Facilities
    • Proposals for beam time
    • Proposal Deadlines
    • Data Analysis Service (PSD)
    • EU support programmes
  • New ProjectsOuvrir ce point de menu principal
    • SLS 2.0
    • IMPACT
  • DE
  • EN
  • FR

Digital User Office (mobile)

  • Digital User Office

Vous êtes ici:

  1. PSI Home
  2. Labs & User Services
  3. BIO
  4. LNB
  5. Research and Technology Innovation
  6. Biointerfaces: Enabling Technology for Bio-Research
  7. Biointerfaces > Polymer Grafting

Navigation secondaire

Laboratory of Nanoscale Biology

  • About LNB
  • Research and Technology Innovation Sous-menu élargi
    • Electron diffraction of biological specimens
    • EM&D Group, Electron Microscopy Facility
    • Cellular structural biology and imaging
    • Structural Neurobiology
    • Mechano-Genomics
    • Cellular Engineering and Microscopy
    • Biointerfaces: Enabling Technology for Bio-Research
    • Ultrasound Mechanobiology
  • Knowledge Transfer and Education
  • Facilities
  • Scientific Highlights
  • Publications
  • People
  • Emeriti / Alumni

Info message

Ce contenu n'est pas disponible en français.

Polymer Micro and Nanografting

The combination of selective irradiation of polymer materials with photons to create active radical species with a subsequent graft polymerization reaction is a unique technique to produce micro- and nanostructured polymer materials. A key feature of the technology is the possibility to combine the properties of a polymer substrate in precisely defined regions with properties of the grafted materials, resulting e.g. in local electrical or ionic conductivity, biological activity or surface functionality.

Radical species are formed when photons or particles of engeries high enough to break chemical bonds are absorbed by polymer materials. Radicals created at the surface may be used as initiators for polymerization reactions, leading to the growth of polymer brushes. In our work we are using EUV-radiation, e-beam exposures as well as Helium or Argon plasma sources for surface activation. 

 

AFM image of poly(glycidyl methacrylate) nanostrucutures grafted on a fluoropolymer foil
AFM image of poly(glycidyl methacrylate) nanostrucutures grafted on a fluoropolymer foil

Nanostructured brushes via EUV-IL exposures

The technology to graft nanostructured polymer brushes takes advantage of the unique structuring capabilities of the EUV interference beamline at SLS, which enables the formation of patterns of radicals with sub-100-nm resolution. Our work in this field includes:

Structure definition and reaction control
    • Reaction control using RAFT polymerization
    • Influence of solvent viscosity on surface grafting

Functional Polymer Brushes
    • Biofunctional Brushes
    • Responsive polymer brushes
    • Polyelectrolyte multilayers on structured brushes
    • Metal and metal oxide nanocomposites

Current research Focus: Polymer brushes as biointerfaces.
pH dependent switching the wettability of a polyelectrolyte brush
pH dependent switching the wettability of a polyelectrolyte brush

Large area functionalization using plasma activation

For the creation of radical initiators for large-area grafting, plasma sources operated with inert gases can be used. For low-pressure activation the area which can be activated and grafted is mainly determined by the size of the plasma chamber. The recenly developed atmospheric-pressure plasma systems proved to be well suited for a very quick but still reliable activation of smaller areas of up to a few cm2. Shadow masks can be employed for a selective actication and grafting of well definde areas on a substate. Plasma-induced grafting has been used for:


    • Functionalization of Polymer foils with poly-electrolyte brushes
    • Functionalization of pre-structured polymer foils
    • Formation of wettabilty gradients
    • Creation of Bio-functional surfaces

micro-nanografting.jpg

Celestino Padeste und Sonja Neuhaus
Polymer Micro- and Nanografting
Based on own work and literature reports this book provides a summary of strategies for the formation of functional polymer patterns and structures on polymeric substrates using grafting processes.

Elsevier 2015; ISBN: 978-0-323-35322-9
Online Edition Elsevier Book Store



Selected Papers

M. Dübner, V.J. Cadarso, T.N. Gevrek, A. Sanyal, N.D. Spencer, and C. Padeste
"Reversible Light-Switching of Enzymatic Activity on Orthogonally Functionalized Polymer Brushes"
ACS Appl. Mater. Interfaces, 2017, 9 (11), pp 9245-9249

M. Dübner, M.E. Naoum, N.D. Spencer, C.Padeste,
“From pH- to Light-Response: Post-Polymerization Modification of Polymer Brushes Grafted onto Microporous Polymeric Membranes”,
ACS Omega, 2, 2017, 455-461., ACS LiveSlides™ presentation

K. Gajos, V.A. Guzenko, M. Dübner, J. Haberko, A. Budkowski, C. Padeste
"Electron-beam lithographic grafting of functional polymer structures from fluoropolymer substrates"
Langmuir 32(41), 2016, 10641–10650

M. Dübner, T.N. Gevrek, A. Sanyal, N.D. Spencer, C. Padeste
"Fabrication of Thiol-Ene "Clickable" Copolymer-Brush Nanostructures on Polymeric Substrates via Extreme Ultraviolet Interference Lithography",
ACS Appl. Mater. Interfaces 2015, 7, 11337–11345.

M. Dübner, N.D. Spencer, C. Padeste,
"Light-Responsive Polymer Surfaces via Postpolymerization Modification of Grafted Polymer-Brush Structures",
Langmuir, 30 (2014) 14971−14981

S. Neuhaus, N.D. Spencer, C. Padeste,
“Anisotropic Wetting of Microstructured Polymers as a Function of Surface Chemistry”,
ACS Applied Materials and Interfaces 4 (2012) 123-127

S. Neuhaus, C. Padeste, N.D. Spencer,
“Versatile Wettability Gradients Prepared by Chemical Modification of Polymer Brushes”
Langmuir 27 (2011) 6855–6861.

S. Neuhaus, C. Padeste, N.D. Spencer,
“Functionalization of Fluropolymers and Polyolefins via Grafting of Polyelectrolyte Brushes from Atmospheric-Pressure Plasma Activated Surfaces”
Plasma Processes and Polymers 8, 6 (2011) 512-522.

S. Neuhaus, C. Padeste, H.H. Solak, N.D. Spencer,
“Functionalization of fluoropolymer surfaces with nanopatterned polyelectrolyte brushes”
Polymer 51 (2010) 4037-4043.

P. Farquet, A. Kunze, C. Padeste, H.H. Solak, S. Alkan Gürsel, G.G. Scherer and A. Wokaun,
“Influence of the solvent viscosity on surface graft-polymerization reactions”,
Polymer, 48 (2007) 4936-4942.

H.-P. Brack, C. Padeste, M. Slaski, S. Alkan, and H. H. Solak,
„Preparation of Micro- and Nanopatterns of Polymer Chains Grafted onto Flexible Polymer Substrates”
J. Am. Chem. Soc., 126, 4 (2004) 1004-1005.




Sidebar

Contact

Dr. Celestino Padeste

Division of Biology and Chemistry
Paul Scherrer Institut
Forschungsstrasse 111
5232 Villigen PSI
Switzerland

Telephone:
+41 56 310 2141

E-mail:
celestino.padeste@psi.ch

top

Pied de page

Paul Scherrer Institut

Forschungsstrasse 111
5232 Villigen PSI
Suisse

Téléphone: +41 56 310 21 11
Téléfax: +41 56 310 21 99

Comment nous trouver 
Contact

Centre de visiteurs psi forum
Laboratoire élèves iLab (en allemand)
Centre de protonthérapie
Centre de Formation du PSI
PSI Guest House (en anglais)
PSI Gastronomie (en allemand)
psi forum shop

Service & Support

  • Annuaire
  • User Office
  • Accelerator Status
  • Publications du PSI
  • Fournisseurs
  • E-facture
  • Computing (en anglais)
  • Sicherheit (en allemand)

Carrière

  • Travailler au PSI
  • Offres d'emploi
  • Formation initiale et formation continue
  • Career Center
  • Formation professionnelle (en allemand)
  • Centre de Formation du PSI

Pour les médias

  • Le PSI en bref
  • Chiffres et faits
  • Le coin médias
  • Communiqués de presse
  • Réseaux sociaux

Suivez le PSI: Twitter (in English) LinkedIn Youtube Facebook Instagram Issuu RSS

Footer legal

  • Impressum
  • Conditions d'utilisation
  • Login éditeurs