Highly sensitive, flexible and biocompatible temperature sensor utilizing ultra-long Au@AgNW-based polymeric nanocomposites

作者：Amit Kumar, Muhammad Omar Shaikh, R. K. Rakesh Kumar, K. Mahesh Dutt, Cheng-Tang Pan, Cheng‐Hsin Chuang · 发表于：Nanoscale · 年份：2021 · DOI：10.1039/d1nr05068k · 被引用次数：46 · 研究领域：Advanced Sensor and Energy Harvesting Materials、Conducting polymers and applications、Nanomaterials and Printing Technologies

) etching in solution phase. Finally, the fabricated nanowires were used to prepare the Au@AgNW-poly-ethylene glycol (PEG)-polyurethane (PU)-based nanocomposite ink which can be printed on interdigitated electrodes to fabricate a thermoresistive temperature sensor with negative temperature coefficient (NTC) of resistance and quick response time (<100 s). The Au@AgNW-PEG-PU nanocomposite was characterized in detail and a novel temperature sensing mechanism based on controlling the internanowire distance of the PEG coated Au@AgNWs percolation by means of capillarity force among the nanowires as a result of the glass transition temperature of thermosensitive PEG was demonstrated. The proposed printable temperature sensor is flexible and biocompatible and shows promise for a range of wearable applications.