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- W4294168991 abstract "Grafting Mn ions on 1D particles can produce high-performance MRI agents. However, the motion of Mn ions may cause Mn aggregation and then attenuate imaging contrast. Here, we proposed an MRI-promotion strategy based on embedding Mn2+ into crosslinked polydopamine (PDA) coating on rod-like cellulose nanocrystals. The results indicate that the slow relaxation of PDA molecular chains restricts the motion of embedded Mn2+. When the embedded Mn2+ content raises up to 2.25 wt%, the particles display a longitudinal relaxivity of 38.08 mM−1·s−1. Such a relaxivity is over 6.6 times of the sample with adsorbed 0.65 wt% Mn2+. The aspect ratio of nanoparticles even increases from 14.2 to 20.7 as embedding Mn2+ concentration increases. Then, the photothermal conversion efficiency of nanoparticles increases from 17.7 % to 44.4 %. This high photothermal conversion efficiency contributes this kind of MRI agent with embedded Mn2+ to the application potential of integrating tumor diagnosis and treatment." @default.
- W4294168991 created "2022-09-02" @default.
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- W4294168991 date "2022-12-01" @default.
- W4294168991 modified "2023-10-18" @default.
- W4294168991 title "Embedding Mn2+ in polymer coating on rod-like cellulose nanocrystal to integrate MRI and photothermal function" @default.
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- W4294168991 doi "https://doi.org/10.1016/j.carbpol.2022.120061" @default.
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