Hierarchically ordered nanopatterns for spatial control of biomolecules

Area of Science:

• Materials Science
• Nanotechnology
• Biotechnology

Background:

• Precise fabrication of nanoscale patterns is crucial for advanced biological applications.
• Existing methods for creating biomolecular patterns can be expensive and complex.
• Hierarchical and mixed morphologies offer unique possibilities for surface functionalization.

Purpose of the Study:

• To present a novel, cost-effective, and high-throughput fabrication strategy for hierarchical biomolecular patterns.
• To achieve sub-50 nm resolution in patterned biomolecule arrays.
• To demonstrate the versatility of a single block copolymer for creating diverse nanopatterns.

Main Methods:

• Synthesis of a diblock copolymer (polystyrene-b-poly(ethylene oxide), PS-b-PEO) with specific functional handles (biotin and 4-bromostyrene).
• Post-functionalization of thin films with biotinylated biomolecules.
• Photolithography to create micropatterns of nanoscale-ordered films.
• Tuning solvent annealing and irradiation conditions to control polymer morphology.

Main Results:

• Successful fabrication of hierarchical biomolecular patterns with sub-50 nm resolution.
• Demonstration of two distinct nanopatterns (lines and dots) by controlling PEO cylinder orientation.
• Achieved hierarchical mixed morphologies by combining parallel and perpendicular cylinder orientations.
• The method is benchtop, high-throughput, and inexpensive.

Conclusions:

• The developed fabrication strategy offers a versatile and accessible approach for creating complex biomolecular nanostructures.
• This method enables precise control over nanoscale patterning for potential applications in biosensing, tissue engineering, and fundamental research.
• The use of a single, dual-functionalized block copolymer simplifies the process and expands design possibilities.