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Fig. 3 | Journal of Nanobiotechnology

Fig. 3

From: Vancomycin-conjugated polydopamine-coated magnetic nanoparticles for molecular diagnostics of Gram-positive bacteria in whole blood

Fig. 3

Characterization of iron oxide MNPs, PDA-MNPs, and van-PDA-MNPs. a Images of each type of MNP on a 300-mesh copper grid were obtained by TEM (JEM-2100F) (JEOL Ltd.). Element composition in b MNPs, c PDA-MNPs and d van-PDA-MNPs using XPS. Each type of MNP was placed on a glass slide, and their elemental composition was studied by exciting the MNPs to mono-energetic Al kα x-rays and measuring the energy of photoelectrons emitted by electron energy analyser (ESCALAB250 XPS analyser). e The zeta potential of each type of MNP was measured using a Zetasizer Nano ZS (Malvern Instruments). f Elemental mapping of van-PDA-MNPs obtained by TEM with EDS. Student’s t-test, ***: P < 0.001. **: P < 0.01.*: P < 0.05. n = 3

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Journal of Nanobiotechnology

ISSN: 1477-3155

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