High-Precision Printable Self-Powered NH3 Sensor Enabled by 0D/1D Synergistic Black-TiO2/MWCNT Heterostructure: Mass-Produced, Health Monitoring
발표자
조은호 (건국대학교)
연구책임자
김세현 (건국대학교)
초록
내용
Wearable NH₃ sensors are vital for early detection of toxic NH₃ exposure and noninvasive breath-based diagnosis of kidney disease. However, most are limited by rigidity and power dependence. Here, we present a fully printed, miniaturized, low-cost, self-powered flexible patch using black titanium oxide (B-TiO₂) nanoparticles and multi-walled carbon nanotubes (MWCNTs) via dispensing printing. MWCNTs offer a robust conductive scaffold, while oxygen-deficient B-TiO₂ provides abundant redox sites for charge storage. The resulting asymmetric microsupercapacitor (MSC) delivers a high areal capacitance of 16.3 mF cm⁻². The narrow bandgap of B-TiO₂, combined with internal n–n⁺ junctions and external n–p junctions with MWCNTs, boosts interfacial charge transport. This multidimensional synergy enables efficient, room-temperature NH₃ sensing. The integrated design supports scalable fabrication of robust, wearable, self-powered NH₃ sensors.