Indium-free transparent conductive thin films (TCFs) with high optical transparency, low sheet resistance, and robust mechanical durability are crucial for next-generation flexible optoelectronics. Here, we report a room-temperature dielectric-engineered SiO2/Ag nanowire (Ag NW) composite TCF that simultaneously achieves excellent optoelectronic performance and environmental stability. An ultrathin SiO2 layer is conformally integrated with Ag NW networks, enabling quantum-tunneling-mediated interwire conduction while leveraging the dielectric layer to enhance adhesion, suppress silver oxidation, and improve mechanical robustness. Systematic tuning of nanowire density leads to an optimized composite film exhibiting a transmittance of 88.7
Considering its excellent film-forming properties and biodegradability, chitosan was expected to become one of the new raw materials for green electronic components. However, pure chitosan film was difficult to achieve satisfactory application in the field of ultra-flexible electronic devices due to its insufficient flexibility and poor high-temperature resistance. In this study, citric acid and glycerol were used to modify chitosan to enhance its overall performance. Based on this, a conductive film composed of silver nanowires (AgNWs) embedded into citric acid cross-linked chitosan was fabricated via a transfer method. During the preparation process, the optoelectronic properties of the composite film were improved by the method of heat treatment. The results showed that the composite film exhibited low surface roughness ( RMS = 5.48 ± 1.16), excellent transmittance (the sheet resistance is 15 Ω/sq and the transmittance at 550 nm is 73.7
As laser engraving morphology defect detection becomes a key link in laser engraving technology, traditional detection methods have problems such as low efficiency and lack of accuracy. To meet the actual needs of laser engraving morphology defect detection, the study proposes a laser engraving morphology defect detection method based on transfer learning and DenseNet121. This study uses a laser engraving morphology defect image dataset, adopting transfer learning and histogram equalization methods to classify and enhance the images in the dataset. Moreover, a data partitioning strategy is used to divide the dataset into mutually exclusive subsets. Finally, DenseNet121 network structure is adopted for shallow and deep parameter fine-tuning. The outcomes revealed that the research method took 175ms and 286ms to detect cracks and porosity defect problems, respectively. In the real application test, the research method achieved 94.9
The development of skin-conformal, transparent, and reliable temperature sensors is essential for advancing next-generation wearable electronics and real-time physiological monitoring. Herein, we report a novel skin-conformal transparent temperature sensor (SCTTS) based on Cr2O3-coated silver nanowire (Ag NW) freestanding transparent conductive nanomembranes (FTCNMs). These ultrathin hybrid nanomembranes (NMs) (similar to 800 nm) exhibit high optical transmittance (similar to 87.3 %), low sheet resistance (11.6 Omega/square), and outstanding mechanical flexibility. The conformal Cr2O3 shell (similar to 3 nm) grown via a facile surface conversion of CrF3, significantly enhances the environmental stability of Ag NWs without deteriorating electrical and optical performance. The obtained SCTTSs demonstrate a high transmittance (92 %), linear temperature coefficient of resistance (TCR approximate to 0.0022 degrees C-1) over the temperature range of 0 similar to 100 degrees C, excellent thermal cycling durability, and high sensitivity to small temperature changes (0.2 degrees C). Moreover, the Cr2O3 shell enables long-term operational stability, with negligible resistance drift over 180 days in ambient air and under 30 h of UV-ozone exposure. When laminated onto human skin, the SCTTSs exhibit seamless conformability and robust temperature-sensing performance in realistic scenarios.
Flexible transparent conductive thin films (TCFs) are critical components in optoelectronic devices but are often limited by the trade-off between optical transparency, conductivity and stability. Herein, we report a dielectric-engineered Ag nanowire (Ag NW)/Nb2O5/SiO2/Nb2O5/SiO2 (Ag NW/SNSN) composite TCF with ultra-high light transmittance. Guided by optical interference modeling, the four-layer SNSN dielectric stack is optimized to suppress reflection and absorption losses, causing a relative transmittance above 99% and a high figure of merit (similar to 1082), while the sheet resistance is 43.3 Omega/sq. Furthermore, the conductivity of composite TCFs does not show great change after tape test and ultrasonication, suggesting a strong adhesion of Ag NWs to the substrate. Moreover, the Ag NW/SNSN composite TCFs show a good stability to resist long-term storage, oxidation, sulfidation, and chloride corrosion. These results demonstrate that coupling dielectric interference design with nanoscale encapsulation enables TCFs operating near the theoretical transmittance limit of the substrate, offering a versatile strategy for flexible, durable, and high-performance optoelectronic devices.
