研究目的
To develop a stretchable translucent conductive film based on polymer microspheres lithography technology for applications in flexible electronic and biomedicine fields.
研究成果
The stretchable translucent conductive film was successfully prepared using a PS microsphere lithography technique combined with a metal sputtering method. The films exhibit high transmittance of 53% at 550 nm wavelength and good stretchability up to 150% strain. They possess better conformability on complex curve surfaces than conventional bendable transparent conductive films and present excellent potential applications in flexible electronic and biomedical sensor fields.
研究不足
The stretchable translucent conductive films have relatively poor transmittance compared with pure PDMS film. The fabrication process needs optimization to improve performance such as transmittance, sheet resistance, stretchability, and electrical-mechanical stability.
1：Experimental Design and Method Selection:
The study employed a method based on polystyrene (PS) microspheres to obtain a stretchable transparent conductive film. The homogeneous mono-layer PS microstructure arrays were self-assembled on the surface of modified polydimethylsiloxane (PDMS) film. The size and spacing distance of the microspheres were adjusted by plasma etching technology to obtain non-closed PS arrays. A layer of conductive metal was then deposited on the etched microsphere arrays using magnetron sputtering technology.
2：Sample Selection and Data Sources:
PS microspheres with uniform diameter of ~5.6 μm were used. The PDMS silicone elastomer kit (Sylgard 184) was provided by Dow Corning.
3：6 μm were used. The PDMS silicone elastomer kit (Sylgard 184) was provided by Dow Corning.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: PS microspheres, hydrogen peroxide (H2O2), concentrated sulfuric acid (H2SO4), ethanol, PDMS silicone elastomer kit, magnetron sputtering technology for depositing conductive metal.
4：Experimental Procedures and Operational Workflow:
The PS microspheres were self-assembled on modified PDMS film substrate. The microspheres were then etched to adjust their size and spacing. A conductive metal layer was deposited on the etched microsphere arrays. The stretchable translucent conductive films were characterized for transmittance and electrical stability under stretching conditions.
5：Data Analysis Methods:
The transmittance was measured by UV spectrophotometer. The stretchability was tested by an electric tensile test machine.
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