Photoluminescence and magnetism integrated multifunctional black phosphorus probes through controllable PO bond orbital hybridization.
S Y WuR L QianC L MaYun ShanY J WuX Y WuJ L ZhangXiaobin ZhuH T JiC Y QuF HouLizhe LiuPublished in: Physical chemistry chemical physics : PCCP (2021)
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.
Keyphrases
- single molecule
- quantum dots
- room temperature
- magnetic resonance imaging
- energy transfer
- living cells
- nucleic acid
- high resolution
- contrast enhanced
- sewage sludge
- drug delivery
- small molecule
- dna repair
- ionic liquid
- dna damage
- fluorescence imaging
- light emitting
- cancer therapy
- metal organic framework
- transition metal
- computed tomography
- hydrogen peroxide
- nitric oxide
- risk assessment
- high speed
- heavy metals
- visible light
- molecularly imprinted
- label free