Structured Surfaces on Glass Slides and Wetting Behaviors

Area of Science:

• Materials Science
• Polymer Chemistry
• Surface Science

Background:

• Surface coassembly of polymer brushes and block copolymers (BCPs) is key for fabricating nanostructured surfaces.
• Understanding self-assembly behavior is crucial for designing functional materials.

Purpose of the Study:

• To investigate the self-assembly of poly[2-(dimethylamino)-ethyl methacrylate]-block-polystyrene (PDMAEMA-b-PS) BCPs and polystyrene (PS) brushes on glass slides.
• To explore methods for fabricating tunable surface nanostructures.

Main Methods:

• Deposition of tannic acid on gold-coated glass slides.
• Anchoring PDMAEMA-b-PS onto the surface via hydrogen bonding.
• Inducing coassembly with PS brushes in methanol to form structured surfaces.

Main Results:

• Surface nanostructure formation was influenced by PS brush length, BCP concentration, and PDMAEMA/PS block length.
• Increasing the solvophobic component led to structural transitions from spherical micelles to wormlike and layer structures.
• Surface hydrophobicity increased with structural changes, and layer structures were removable with acidic treatment.

Conclusions:

• This study presents a method for synthesizing surface nanostructures on 2D solid surfaces.
• The findings offer insights into controlling surface properties through polymer self-assembly.