Nanopatterning Biomolecules by Block Copolymer Self-Assembly.

Area of Science:

• Biomaterials Science
• Nanotechnology
• Cell Biology

Background:

• Fabricating nanoscale features with bioactive molecules is complex and costly.
• Developing advanced materials for controlled cell adhesion is crucial for biomedical research.
• Existing methods lack modularity and cost-effectiveness for creating specific nanoscale surface topographies.

Purpose of the Study:

• To present a modular strategy for creating nanostructured substrates with controlled cell adhesion properties.
• To utilize functional block copolymers (BCPs) for precise control over nanoscale surface features.
• To investigate the influence of surface functionality on fibroblast cell adhesion and morphology.

Main Methods:

• Synthesis of functionalized poly(styrene-b-ethylene oxide) block copolymers.
• Fabrication of nanostructured substrates with approximately 25 nm features.
• Functionalization of BCPs with peptides, perfluorinated moieties, or both.
• Assessment of NIH3T3 fibroblast cell adhesion, focal adhesion formation, and morphology on the substrates.

Main Results:

• Demonstrated successful fabrication of nanostructured substrates using BCPs.
• Observed significant variations in cell adhesion, focal adhesion formation, and cell morphology based on surface functionality.
• Showcased the ability of BCPs to promote or inhibit cell adhesion through tailored nanoscale phase separation.

Conclusions:

• The developed modular strategy offers a cost-effective and versatile method for creating bioactive nanostructured surfaces.
• These materials effectively mimic aspects of the extracellular matrix (ECM), influencing cell behavior.
• The findings provide a foundation for designing advanced biomaterials for tissue engineering and cell-based assays.