In a breakthrough that could revolutionize force sensing technologies, researchers have developed a new type of mechanoluminescent (ML) force sensor that can provide high-resolution, pixelated force information. This innovation, led by Xiaole Ma from the National Key Laboratory of Advanced Micro and Nano Manufacture Technology at Shanghai Jiao Tong University, was recently published in the journal *Nature Communications*. The study introduces a hierarchical multiscale structure that enhances the performance of ML devices, making them more efficient and versatile.
Mechanoluminescence is a phenomenon where materials emit light in response to mechanical stress. While this property has been known for some time, existing thin-film ML devices have struggled with low light emission efficiency and poor luminescent contrast. These limitations have hindered their application in advanced sensing technologies. The research team addressed these challenges by creating a multiscale-structured array that leverages both microscale and nanoscale patterns to enhance stress-light interaction.
The new design achieves a high-resolution output of 637 pixels per inch (PPI), a significant improvement over previous technologies. By combining stress localization from microscale structures and light extraction enhancement from nanoscale patterns, the ML force-sensing membrane produces a dynamic contrast pattern at 521 nm. This results in a 366% increase in light intensity compared to bare film, making the sensors more sensitive and reliable.
One of the most exciting aspects of this research is its potential for commercial applications. The ability to create pixelated and programmable force-light interaction systems opens up new possibilities for advanced sensing technologies in various industries, including maritime. For instance, these sensors could be used to monitor the structural integrity of ships, offshore platforms, and other maritime infrastructure. By providing real-time, high-resolution force information, they could help prevent failures and improve safety.
The research also demonstrates the potential for creating force-sensitive counterfeits, which could be used in anti-counterfeiting measures and secure authentication systems. This could be particularly useful in the maritime industry, where the verification of goods and equipment is crucial for maintaining supply chain integrity.
In a statement, lead author Xiaole Ma highlighted the significance of the research: “Our work showcases the potential of multiscale-structured ML in developing pixelated and programmable force-light interaction systems. This could pave the way for advanced sensing technologies that are more efficient and versatile than ever before.”
The study, published in *Nature Communications*, represents a significant step forward in the field of mechanoluminescence. As the technology continues to evolve, it is likely to find applications in a wide range of industries, including maritime, where the need for reliable and advanced sensing technologies is ever-growing.