Photoluminescence and magnetism integrated multifunctional black phosphorus probes through controllable PO bond orbital hybridization
Literature Information
S. Y. Wu, R. L. Qian, C. L. Ma, Y. Shan, Y. J. Wu, X. Y. Wu, J. L. Zhang, X. B. Zhu, H. T. Ji, C. Y. Qu, F. Hou, L. Z. Liu
Biological probes with integrated photoluminescence and magnetism characteristics play a critical role in modern clinical diagnosis and surgical protocols combining fluorescence optical imaging (FOI) with magnetic resonance imaging (MRI) technology. However, traditional magnetic semiconductors can easily generate a spin splitting at the Fermi level and half-metallic electronic occupation, which will sharply reduce the radiation recombination efficiency of photogenerated carriers. To overcome this intrinsic contradiction, we propose a controllable oxidation strategy to introduce some particular PO bonds into black phosphorus nanosheets, in which the p orbital hybridization between P and O atoms not only provides some carrier recombination centers but also leads to a room-temperature spin polarization. As a result, the coexistence of photoluminescence and magnetism is realized in multifunctional black phosphorus probes with excellent biocompatibility. This work provides a new insight into integrating photoluminescence and magnetism together by intriguing atomic orbital hybridization.
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Physical Chemistry Chemical Physics

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