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. 2021 Jan 22;12:523. doi: 10.1038/s41467-020-20860-3

Fig. 2. Morphology optimization of the pHPFON nanocarrier.

Fig. 2

a Design and synthesis of the semiconducting polymer brush (SPB) silane precursor. (i) bis(triphenylphosphine)palladium(II) dichloride, 2,6-di-tert-butylphenol, toluene, 100 °C, 6 h; (ii) NaN3, THF/DMF, 25 °C, 12 h. (iii) N,N,N′,N″,N‴-pentamethyldiethylenetriamine, mPEG5000-alkyne, CuBr, THF, 25 °C, 48 h. (iv) trifluoroacetic acid (TFA), 24 °C, 24 h. (v) (3-Aminopropyl)triethoxysilane (APTES), EDC/NHS, DMF, 25 °C, 12 h. b TEM images of different SPB and fluorocarbon (FC) chain co-hybridized formulations: SPB/FC, SPB/FC/–Si–O-, SPB/FC/thioether, or SPB/FC/phenylene-hybridized MSN@MON (top) and HPFON (bottom). Scale bar, 50 nm. Experiments were performed three times with similar results.