Photoluminescence and magnetism integrated multifunctional black phosphorus probes through controllable PO bond orbital hybridization

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 e...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2021-10, Vol.23 (39), p.22476-22482
Main Authors: Wu, S. Y., Qian, R. L., Ma, C. L., Shan, Y., Wu, Y. J., Wu, X. Y., Zhang, J. L., Zhu, X. B., Ji, H. T., Qu, C. Y., Hou, F., Liu, L. Z.
Format: Article
Language:English
Subjects:
Atomic properties
Biocompatibility
Carrier recombination
Fluorescence
Hybridization
Magnetic resonance imaging
Magnetic semiconductors
Magnetism
Medical imaging
Oxidation
Phosphorus
Photoluminescence
Polarization (spin alignment)
Room temperature
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Summary: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 PO 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.
ISSN:1463-9076
1463-9084
DOI:10.1039/d1cp03155d