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One-dimensional (1D) materials have attracted significant research interestdue to their unique quantum confinement effects and edge-related properties.Atomically thin 1D nanoribbon is particularly interesting because it is avaluable platform with physical limits of both thickness and width. Here, wedevelop a catalyst-free growth method and achieves the growth of Bi2O2Senanostructures with tunable dimensionality. Significantly, Bi2O2Se nanoribbonswith thickness down to 0.65 nm, corresponding to monolayer, are successfullygrown for the first time. Electrical and optoelectronic measurements show thatBi2O2Se nanoribbons possess decent performance in terms of mobility, on/offratio, and photoresponsivity, suggesting their promising for devices. This worknot only reports a new method for the growth of atomically thin nanoribbons butalso provides a platform to study properties and applications of suchnanoribbon materials at thickness limit.

Catalyst-Free Growth of Atomically-thin Bi2O2Se Nanoribbons for High-performance Electronics and Optoelectronics