Related Experiment Video
Updated: Nov 22, 2025
10:09
Fabricating Reactive Surfaces with Brush-like and Crosslinked Films of Azlactone-Functionalized Block Co-Polymers
Published on: June 30, 2018
8.5K
Surface Structuring Meets Orthogonal Chemical Modifications: Toward a Technology Platform for Site-Selectively
Maria Vöhringer1, Wibke Hartleb1, Karen Lienkamp1
1Department of Microsystems Engineering (IMTEK) and Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), Albert-Ludwigs-Universität, Georges-Köhler-Allee 103, 79110 Freiburg, Germany.
ACS Biomaterials Science & Engineering
|January 12, 2021
Summary
This study introduces a novel manufacturing process for precisely modifying material surfaces with two distinct polymers. This bifunctional surface technology effectively combats bacteria while minimizing protein adhesion.
Area of Science:
- Materials Science
- Surface Chemistry
- Biotechnology
Background:
- Developing methods for site-selective surface modification is crucial for advanced materials.
- Creating bifunctional surfaces with distinct properties presents significant challenges.
- Existing techniques often lack the precision required for complex surface architectures.
Purpose of the Study:
- To present a novel manufacturing process for site-selective surface modification.
- To demonstrate the immobilization of an antimicrobial polymer and a protein-repellent polymer on a single surface.
- To investigate structure-property relationships of these bifunctional surfaces.
Main Methods:
- Creating chemical surface contrast using colloidal lithography (gold-on-silicon).
- Employing two orthogonal surface reactions for polymer/biomolecule immobilization.
- Characterizing surface properties and interactions using fluorescence microscopy, AFM, SPR, and antimicrobial assays.
Main Results:
- Successful site-selective immobilization of an antimicrobial SMAMP polymer and a protein-repellent polyzwitterion.
- Demonstrated structure-property relationships by varying structure spacing and surface architecture.
- Achieved a bifunctional material with antimicrobial activity and near-quantitative protein adhesion reduction at 1 μm spacing.
Conclusions:
- The presented process is a versatile platform technology for creating site-selectively functionalized bifunctional surfaces.
- This method is applicable to polymers and biomolecules with aliphatic CH-groups.
- The technology holds promise for applications in bifunctional (Bio)MEMS devices.
