Self-Assembled 2D Free-Standing Janus Nanosheets with Single-Layer Thickness

Area of Science:

• Materials Science
• Biotechnology
• Nanotechnology

Background:

• Peptide self-assembly is a key strategy for creating advanced nanomaterials.
• Developing ordered, functional two-dimensional (2D) structures remains a challenge.
• Controlling morphology and surface properties is crucial for material applications.

Purpose of the Study:

• To achieve thermodynamically controlled growth of solution-processable, free-standing peptide nanosheets.
• To create Janus 2D structures with predetermined surface heterofunctionalization.
• To explore the controlled morphological transition of these 2D structures.

Main Methods:

• Utilizing self-sorting between peptide beta-strands and hydrocarbon chains for assembly.
• Engineering intermolecular forces to control 2D-to-1D morphological transitions.
• Characterizing the structure and properties of the resulting nanosheets.

Main Results:

• Demonstrated the formation of single-layer Janus 2D peptide structures.
• Achieved predetermined surface heterofunctionalization via self-sorting.
• Observed enhanced enzyme activity when using the nanosheets as a substrate for guest components.

Conclusions:

• Sequence-specific programmed peptides are effective design elements for 2D assemblies.
• The developed Janus nanosheets offer a versatile platform for engineering guest components.
• This work provides a pathway for creating functional nanomaterials with face-selective properties.