Smart touchless human-machine interaction based on crystalline porous cages.

Area of Science:

• Materials Science
• Sensor Technology
• Human-Machine Interaction

Background:

• The COVID-19 pandemic accelerated the adoption of touchless technology, significantly impacting human-machine interaction (HMI).
• The global market for touchless technology is projected to grow substantially, indicating a strong demand for innovative solutions.

Purpose of the Study:

• To develop a highly responsive and stable organic cage-based humidity sensor for advanced touchless HMI applications.
• To explore the potential of molecularly porous materials in creating cost-effective and easily processable touchless interfaces.

Main Methods:

• Fabrication of an organic cage-based humidity sensor utilizing its unique 3D pore network and water-absorbing functional groups.
• Characterization of the sensor's performance, including response/recovery time and stability over a wide range of relative humidity (RH).
• Demonstration of the sensor's application in smart touchless control screens and password managers.

Main Results:

• The organic cage sensor exhibited an ultrafast response time of 1 second and recovery time of 3 seconds.
• Exceptional stability was observed over 800 cycles across a broad RH range (11% to 95%).
• The sensor's performance is attributed to the synergistic effect of its 3D pore network and abundant functional groups.

Conclusions:

• The developed organic cage-based humidity sensor provides a robust platform for future touchless HMI systems.
• This technology offers a cost-effective and versatile solution for various touchless applications, including control screens and password managers.