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Updated: Feb 9, 2026

Graphene Coatings for Biomedical Implants
Published on: March 1, 2013
High-speed graphene@Ag-MnO2 micromotors at low peroxide levels
Heng Ye1, Jian Kang1, Guofeng Ma2
1Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia.
Abstract:
Platinum (Pt) free micro/nanomotors (MNMs) using a low content of fuels are highly desired for many applications. Herein, we demonstrate that cathodic electrofabrication can produce modified MnO2 based microtubes and microrods as highly efficient MNMs in hydrogen peroxide (H2O2) as low as 0.2%. The speed of graphene/Ag-MnO2 micromotors could be smartly regulated using a surfactant and the maximum speed of an individual micromotor exceeds 1.3 mm s-1 in 0.5% H2O2. The propelling force and output power of the micromotors are 3.4 and 10 times as high as those of the best Pt-based micromotors reported. These Ag-MnO2 based micromotors are envisioned to be a great promise for practical applications from biomedical delivery to environmental decontamination.
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