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Recently, a collaborative research team led by Wang Luda from Peking University’s School of Integrated Circuits and Song Bai from the School of Engineering Science made a significant breakthrough in the field of confined molecular transport. Their findings were published in the prestigious journal Nature Materials under the title “An ångström-scale Janus aperture as a gas flow rectifier.”
Through meticulous experimental observations and extensive theoretical calculations, the team uncovered, for the first time, a rectification effect—where gas molecules of varying compositions, shapes, and sizes exhibit preferential flow directionality—when passing through graphene pores at the ångström scale. Notably, rectification ratios achieved in their study reached up to two orders of magnitude, demonstrating a remarkable ability to control gas flow at the molecular level.
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