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. 2021 Apr 12;11:7907. doi: 10.1038/s41598-021-87010-7

Figure 1.

Figure 1

(A) The synthesis of bi-bead structures formed by conjugating biotin-coated magnetic beads with streptavidin (SA) coated magnetic beads. (B) Tri-bead microrobot linked by azo, and the chemical structure of azo and DOX.