Journal
ADVANCED SCIENCE
Volume 9, Issue 6, Pages -Publisher
WILEY
DOI: 10.1002/advs.202104066
Keywords
2D materials; biomimetic catalyst; monolayer assembly; phosphorene; stability
Categories
Funding
- National Natural Science Foundation of China [21972102]
- Jiangsu Laboratory for Biochemical Sensing and Biochip
- Jiangsu Key Laboratory for Micro and Nano Heat Fluid Flow Technology and Energy Application, Collaborative Innovation Center of Water Treatment Technology and Material
- Jiangsu entrepreneurship and innovation doctoral program the USTS starting fund [331911411]
- Natural Science Foundation of Suzhou University of Science and Technology [342134404]
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This study demonstrates a strategy to enhance the stability of 2D phosphorene material by sandwiching it with self-assembled iron porphyrin monolayers. The resulting I-Phene exhibits improved stability and enhanced sensitivity towards nitric oxide oxidation, making it a promising candidate for highly sensitive biomimetic sensors. The findings have significant implications for the development of phosphorene-based applications.
Instability of 2D phosphorene material is the major obstacle for its broad applications. Herein phosphorene is sandwiched with self-assembled iron porphyrin monolayers on both sides (I-Phene) to significantly enhance stability. Iron porphyrin has strong interaction with phosphorene through formation of P-Fe bonds. The sandwich structure offers excellent stability of phosphorene by both-sided monolayer protections for an intact phosphorene structure more than 40 days under ambient conditions. Meanwhile, the electron transfer between iron porphyrin and phosphorene result in a high oxidation state of Fe, making I-Phene biomimetic sensitivity toward oxidation of nitric oxide (NO) for 2.5 and 4.0 times higher than phosphorene and iron-porphyrin alone, respectively. Moreover, I-Phene exhibits excellent selectivity, a wide detection range, and a low detection limit at a low oxidation potential of 0.82 V, which is comparable with the reported noble metal based biomimetic sensors while ranking the best among all non-noble biomimetic ones. I-Phene is further used for real-time monitoring NO released from cells. This work provides effective approach against phosphorene degrading for outstanding stability, which has universal significance for its various important applications, and holds a great promise for a highly sensitive biomimetic sensor in live-cell assays.
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