Nannochloropsis Oceanica derived nitrogen-rich macroporous carbon for bi-atomic matching-catalytic flexible dopamine sensor

作者：Qianqian Fu, Zhuanzhuan Shi, Xiaoshuai Wu, Yunpeng Li, Liang Liu, Fang Shi, Wei Sun, Chunxian Guo, Chang Ming Li · 发表于：Biosensors and Bioelectronics X · 年份：2022 · DOI：10.1016/j.biosx.2022.100184 · 被引用次数：5 · 研究领域：Electrochemical sensors and biosensors、Gas Sensing Nanomaterials and Sensors、Analytical Chemistry and Sensors

Nannochloropsis Oceanica ( N. Oceanica ) , a microalga was used to derive a nitrogen-rich macroporous carbon (NMC) by a controlled carbonization process. The as-prepared NMC was employed to successfully fabricate a silk fabric-based flexible dopamine (DA) sensor for a broad detection range (0.02–2500 μM) and an extremely low limit of detection (0.006 μM). This ranks the best among all reported plain biochar-based ones. The sensing enhancement mechanism is attributed to the rich nitrogen atoms for a bi-atomic matching-catalysis scheme between catalytic centers and reaction sites of DA. The macroporous carbon can engages fast mass-transport but more importantly renders more robust than a meso/micropore structure for superior flexibility. This work offers a fresh thought to fabricate a highly stable and flexible sensor by using macroporous carbons but with rich nitrogen as catalysis centers for unique catalysis scheme.