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. 2021 May 31;12:698275. doi: 10.3389/fphar.2021.698275

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Copyright © 2021 Feng, Feng, Zhang, Li and Yao.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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FIRMs measurement of pericyte adhesion force on different matrix. (A) Left: TEM images of Fe₄O₃ nanoparticles. Scale bar is 50 nm. Right: amplification image of the encircled nanoparticle in the left image. Scale bar is 5 nm (B) Size distribution of the nanoparticles post-hydrophilization (C) The lineal relationship between the remanence signal and their mass (D) Relative remanence signal of Fe₄O₃ nanoparticles vs. time. The concentration of the nanoparticle used here is 30 ug/ml. (E) Adhesion force of pericytes on different matrices measured by FIRMs.