Research / 2020 / Article / Fig 6

Research Article

Ionic Species Affect the Self-Propulsion of Urease-Powered Micromotors

Figure 6

Motion dynamics of urease micromotors with and without methoxypolyethylene glycol amine (mPEG) coating for different concentrations of NaOH and NaCl at 200 mM urea. (a) Schematic of the mPEG coating effect on urease micromotors. (b) Representative trajectories of urease micromotors in water and 0.5 mM NaCl with and without mPEG coating. (c) Mean squared displacement of urease micromotors with and without mPEG 5000 MW in water. Mean squared displacement of urease micromotors with and without mPEG 5000 MW in (d) 0.5 and (e) 1 mM NaOH. (f) Speed of urease micromotors with and without mPEG 5000 MW in different NaOH concentrations. Mean square displacement of urease micromotors with and without mPEG 5000 MW in (g) 0.5 and (h) 1 mM NaCl. (i) Speed of urease micromotors with and without mPEG 5000 MW in different NaCl concentrations. Results are shown as the , where “” denotes significant differences compared to the control group (, ).