Multigear Bubble Propulsion of Transient Micromotors
Time-dependent changes in the internal structure and speed of a Mg-TiO2 micromotor. (a) Schematic, (b) micrograph, (c) SEM image, and (d) accompanying EDX Mg signal maps of micromotors at different times during their lifetime, from beginning (i), middle (ii), and end (iii). (e) Instantaneous speed of a Mg-TiO2 micromotor during its lifetime until complete Mg depletion.
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