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. 2021 Nov 18;4:159. doi: 10.1038/s42004-021-00598-9

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a TEM image of self-propelling Janus nanobot wherein the Mg nanoparticle forms the core covered by superparamagnetic shell of Fe₃O₄. The crystalline features and the identified lattice fringes co-related well to the structure of magnetite planes with a plane-to-plane separation of 0.249 nm (inset). b FTIR spectra of (i) Mg, (ii) Mg-Fe₃O₄, (iii) Mg-Fe₃O₄-GSH-G4 and (iv) Mg-Fe₃O₄-GSH-G4-Cy5, (v) Mg-Fe₃O₄-GSH-G4-Cy5-Tf, and (vi) Mg-Fe₃O₄-GSH-G4-Cy5-Ab. c Surface charge evolution upon conjugation of GSH-G4, Cy5, and Ab.