Amino-Modified Graphdiyne-Based Flexible Respiratory Sensor for Monitoring Sleep Apnea Syndrome
Respiratory sensors capable of real-time monitoring are essential for health management, disease prevention, and early diagnosis. Achieving real-time respiratory monitoring requires sensors with fast and sensitive response, high stability, and mechanical flexibility. Here, we demonstrate an amino-modified graphdiyne (NH2-GDY)-based sensor for real-time monitoring of human respiratory status. Compared to pristine graphdiyne, the amino-functionalized NH2-GDY exhibits enhanced adsorption capacity for water molecules. Its enlarged nanoporous structure facilitates the migration of water molecules, enabling rapid adsorption/desorption. The sensor demonstrates ultra-fast and ultra-sensitive respiratory responses, coupled with remarkable flexibility and stability. When integrated into a wearable electronic system, it achieves real-time monitoring of sleep apnea syndrome (SAS). This work highlights the feasibility of novel carbon-based respiratory sensors in advanced health monitoring applications. The sensor was fabricated on polyimide (PI) substrates, ensuring mechanical robustness. The amine-rich structure and nanoscale porosity of NH2-GDY facilitate rapid adsorption and transfer of water molecules, enabling fast and highly sensitive respiratory responses. This strategy provides a pivotal solution for early SAS diagnosis and disease management, establishing a novel respiratory sensing paradigm while expanding the application landscape of graphdiyne-based materials.