This article highlights the development of the world’s smallest electrically controlled molecular machine by researchers at Chiba University in Japan. Utilizing ferrocene molecules, which are known for their unique ability to undergo rotational motion due to electronic state changes, the team overcame decomposition issues by stabilizing these molecules with ammonium salts and anchoring them onto a crown ether molecular film. This innovative approach allowed ferrocene to be securely fixed on a copper substrate without degradation. By applying electrical signals via scanning tunneling microscopy, the researchers triggered reversible rotational and lateral sliding motions in the molecules. This groundbreaking work opens avenues for molecular-level applications in fields such as precision medicine, molecular electronics, and advanced manufacturing, demonstrating the potential of controlled nanoscale motion to revolutionize science and industry.
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