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Updated: Aug 11, 2026
Patterning via Optical Saturable Transitions - Fabrication and Characterization
Published on: December 11, 2014
Sustainable Reversible Patterning via Humidity-Switchable Self-Assembled Multilayers Induced by Photolithography
Lifei Liu1,2, Bing Tian1,2, Tong Feng1
1Center of Ionic Liquids and Green Energy, Beijing Key Laboratory of Solid State Battery and Energy Storage Process, State Key Laboratory of Mesoscience and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing100190, China.
Researchers developed a novel humidity-responsive material for dynamic information processing using lithography. This self-assembled photoresist and polyethyleneimine (PEI) system enables controllable patterning with high resolution and environmental friendliness.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Lithography is essential for creating micro/nanoscale patterns.
- Stimuli-responsive materials offer dynamic control over information processing.
- Combining lithography with responsive materials is key for advanced applications.
Purpose of the Study:
- To develop a self-assembled material with both lithographic and humidity-responsive properties.
- To achieve dynamic and controllable information processing under mild conditions.
- To explore the potential of this material in high-resolution lithography.
Main Methods:
- Synthesized a photoresist based on 2-nitro-benzyl methacrylate and combined it with polyethyleneimine (PEI).
- Utilized lithography (254 nm and EBL) to create patterns.
- Investigated structural transitions and humidity-responsive behaviors using UV-vis, FT-IR, and XPS.
Main Results:
- A PEI/polyacrylic acid (PAA) structure was selectively formed in exposed lithography areas.
- Exposed and non-exposed areas showed distinct humidity-responsive behaviors.
- Achieved a highest resolution of 40 nm with excellent responsivity to 254 nm and EBL.
Conclusions:
- The developed material enables dynamic, controllable, and non-destructive information manipulation via humidity response.
- This approach offers mild, environmentally friendly, and long-cycling alternatives to harsh stimuli.
- Integration of lithography and responsive materials presents a novel pathway for advanced information processing.
