Electrospinning Equipment for Research| Photoacoustic synchronization system basedon anisotropic nanofibers

With the rapid development of nanogenerator technology, self-powered systems based on triboelectric nanogenerators (TENGs) have gradually become a research hotspot in the fields of energy harvesting and smart sensing. TENGs can capture mechanical energy and convert it into electricity, providing power for various portable devices and sensors, showing great potential especially in low-power applications such as the Internet of Things (IoT). However, existing nanogenerator systems still face challenges in terms of integration and energy efficiency, particularly in reducing system energy consumption and device footprint while maintaining high energy conversion efficiency.

Recently, Professor Xiaoxiong Wang and Professor Guanglei Wu's team from Qingdao University published their latest research "Photoacoustic synchronization system based on anisotropic nanofibers" in Nano Research. The researchers designed a self-powered photoacoustic synchronization system that directly converts instrument vibrations into light signals (LS) by using TENGs to drive LED brightness changes. This system eliminates the need for traditional chip-based signal conversion and Bluetooth communication systems, significantly reducing energy consumption and achieving long-distance signal transmission.The results demonstrate that this system can effectively eliminate phase differences in traditional acoustic signal transmission, providing a new method for symphony orchestra coordination and stage audio optimization. The brightness changes of LEDs can reflect the phase relationships between different stage areas in real time, greatly improving the synchronization and accuracy of audio signals.

Figure 1 Morphology and mechanical properties of PVDF nanofiber membranes prepared by electrospinning device at different rotation speeds.

As the rotation speed increases, the degree of fiber alignment in the direction parallel to rotation gradually improves. The increased fiber alignment means more regular fiber arrangement, thereby enhancing the mechanical strength of the fiber membrane in the direction parallel to the fiber orientation. Therefore, improved fiber alignment helps enhance the tensile properties of the fiber membrane in the direction parallel to the fiber orientation.The electrospinning technology using an ordered drum collector significantly improves the mechanical properties of non-woven fabrics, with maximum elongation increasing by about 100% and maximum tensile stress increasing from 0.98 MPa to 12.15 MPa. This effective improvement in mechanical properties enables TENGs assembled with this material to be used in complex mechanical environments, achieving an output power density of 14.43 W/m²

Figure 2 Structure, working principle, electrical performance, stability and energy storage capacity of contact-separation TENG

Figure 3 Energy consumption advantages, working principle of self-powered photoacoustic synchronization drum system, and output/light response of TENG under different vibration intensities

Figure 4 Schematic diagram of dual-probe TENG phase detection, voltage signal and phase fitting relationship at different probe spacings, with comparison of phase delay responses between TENG and photoelectric detection

Paper link: https://www.sciopen.com/article/10.26599/NR.2025.94907470