Rotational movement of “Z” shape Au/Pt hybrid micro-nanorobot

This paper presented a“Z” shape Au/Pt hybrid micro-nanorobot propelled by self electrophoresis driving. The Z shape hybrid micro-nanorobot realized itself rotational movement while having a parallel shift. The Z shape micro-nanorobot was designed for the drug delivery, biomedical engineering and so on. Just as its name implies, the mainly raw materials are platinum and gold. By the focus ion beam (FIB) and plasma sputtering, the Z shape nanorobot was fabricated. In order to validate the fabrication method, the researchers adopted the Energy dispersive X-ray analysis (EDS) to check the purity of Pt and Au hybrid nanorobot inside the environmental scanning electron microscope. Once the Z shape nanorobot was put into the hydrogen peroxide (H₂O₂) solution, through the inverted optical microscope, a rotational movement which kept accordance with the analysis of the researchers was achieved. After the rotational movement of nanorobot is realized, the concentration of H₂O₂influence on the movement of nanomotor was evaluated. The nanorobot was put into the concentration rising from 3.0% to 7.6%, and then the average rotation speed of nanorobot increased from 7rpm to 19rpm. Finally, the conclusion was got from the article: 1) the Z shape Au/Pt hybrid micro-nanorobot realized itself rotational movement while having a parallel shift; 2) higher concentration the hydrogen peroxide solution was, stronger propulsion force was generated. Thus the nanorobot had a higher speed of rotational movement.