Integrating Photoluminescence and Ferromagnetism in Carbon Quantum Dot/ZnO by Interfacial Orbital Hybridization for Multifunctional Bioprobes |
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Authors: | Lifen Wang Xiaohan Li Yu Jin Dr. Guangqing Liu Dr. Yun Shan |
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Affiliation: | 1. Department of Otorhinolaryngology Head and Neck Surgery, Zhongda Hospital, Southeast University, Nanjing, 210009 People's Republic of China;2. College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001 People's Republic of China;3. Nanjing Key Laboratory of Advanced Functional Materials, Nanjing Xiaozhuang University, Nanjing, 211171 People's Republic of China |
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Abstract: | Integrating ferromagnetism (FM) and photoluminescence (PL) into one particular nanostructure as biological probe plays an irreplaceable role in accurate clinical diagnosis combining magnetic resonance and photoluminescence imaging technology. However, magnetic emergence generally needs a spin polarization at Fermi level to display a half-metallic electronic feature, which is not beneficial for preserving radiation recombination ability of photo-excited electron-hole carriers. To overcome this intrinsic difficulty, we propose a feasible atomic-hybridization strategy to anchor carbon quantum dots (CQDs) onto ZnO microsphere surface via breakage of C=O bonds at CQDs and subsequent Zn-3d and C-2p orbital hybridization, which not only ensures the carrier recombination but also leads to a room-temperature magnetism. Herein, the photoluminescence and magnetism coexist in this multifunctional heterojunction with outstanding biocompatibility. This work suggests that integration of magnetism and photoluminescence could be accomplished by particular interfacial orbital hybridization. |
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Keywords: | orbital hybridization ferromagnetism photoluminescence biocompatibility multifunctional heterojunctions |
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