Achieving Biofunctional Micropatterns via Protein-Based Aqueous Photoresists with Tailored Functionalities
Jiaqi Wang1,2, Zishun Li3, Min Wang2
1Department of Materials Science, Fudan University, Shanghai, 200433, China.
Small (Weinheim an Der Bergstrasse, Germany)
|January 16, 2025
Summary
A novel silk fibroin-based photoresist, SAMA, enables high-resolution, biocompatible micropatterning using only water. This protein-based material facilitates the creation of bioactive patterns for diverse applications.
Area of Science:
- Materials Science
- Biotechnology
- Nanotechnology
Background:
- Photolithography is crucial for micro- and nanoscale device fabrication.
- Traditional photoresists are toxic, non-aqueous, and require harsh processing, hindering biocompatible micropatterning.
- There is a need for environmentally friendly and biocompatible photoresist materials.
Purpose of the Study:
- To develop a protein-based, aqueous photoresist for high-resolution micropatterning.
- To demonstrate the biocompatibility and biofunctionalization capabilities of the new photoresist.
- To enable the fabrication of bioactive micropatterns for advanced applications.
Main Methods:
- Chemical modification of silk fibroin to create SAMA (silk-based aqueous photoresist).
- High-resolution micropatterning (<1.2 µm) using SAMA and water-based processing (spin-coating, development, lift-off).
- Covalent conjugation of biomolecules (enzymes, nucleic acids) to the SAMA photoresist.
Main Results:
- Achieved high-resolution micropatterning with SAMA, demonstrating feature sizes below 1.2 µm.
- The SAMA photoresist is biocompatible and processed using only water, avoiding toxic reagents and high temperatures.
- Biofunctional molecules retained their activity after covalent conjugation to SAMA during micropatterning.
Conclusions:
- SAMA is a versatile, protein-based aqueous photoresist enabling high-resolution and biocompatible micropatterning.
- The SAMA process is environmentally friendly, utilizing water and mild conditions.
- This technology facilitates the high-throughput generation of bioactive micropatterns for applications in biosynthesis, diagnostics, and biosensors.
