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. 2018 Feb 15;5:4. doi: 10.1186/s40580-018-0136-3

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — a Hydrodynamic diameter D_h (nm) based on dynamic light scattering (DLS) micrograph for Lipid-SPMNP by ligand addition method such as NH₂-lipid, COOH-lipid, and PEG-lipid; b hydrodynamic shell thickness of Lipid-SPMNP by ligand addition method such as NH₂-lipid, COOH-lipid, and PEG-lipid coated SPMNP; c magnetization properties (emu/g particles) of SPMNP, DMSA-SPMNP, TMAOH-SPMNP and NH₂- Lipid-SPMNP; d stability of lipid- SPMNP and DMSA-SPMNP in DMEM medium for 5 h