Wu, DiShi, JiaoZheng, XiaomingLiu, JinxinDou, WeidongGao, YongliYuan, XiaomingOuyang, FangpingHuang, Han2020-10-271862-6254http://hdl.handle.net/1885/213174One‐dimensional (1D) atomically thin crystals have attracted considerable interest due to their unique properties and potential applications. Herein, the chemical vapor deposition (CVD) growth of molybdenum disulfide (MoS2) nanoribbons on sapphire(0001) supported monolayer MoS2 flakes without catalysts as well as the characterizations by means of Raman and photoluminescence (PL) spectroscopy, optical microscopy (OM), atomic force microscopy (AFM), and scanning transmission electron microscopy (STEM). The Raman and PL results is reported, as well as OM images reveal that such MoS2 nanoribbons grow on monolayer MoS2 flakes. STEM and selected area electron diffraction (SAED) results reveal that they are grown along the ⟨101⎯⎯0⟩ direction with atomically sharp edges. Controlled experiments show that the deficiency of sulfur vapor at the beginning of growth induced 1D MoOxS2−x crystals as precursors. The subsequent sulfurization changes them into MoS2 nanoribbons. These findings provide a facile approach to MoS2 nanoribbons and enrich the horizon of the preparation of nanostructured transition metal dichalcogenides.D.W. and J.S. contributed equally to this work. The authors acknowledge the financial support from the National Natural Science Foundation (NSF) of China (Grant Nos. 11874427, 51272291, 51173205, 61474077, 51702368). Dr. Han Huang and Xiaoming Yuan acknowledges support from the Innovation-Driven project of Central South University (Grant Nos. 2017CX018, 2018CX045) and from the Natural Science Foundation of Hunan province (Grant Nos. 2016JJ1021, 2018JJ3684). Di Wu, Jiao Shi, and Xiaoming Zheng acknowledge the support from the Fundamental Research Funds for the Central Universities of Central South University (Grant Nos. 2018zzts107, 2017zzts330, 2017zzts066). The Australian Microscopy and Microanalysis Research Facility are acknowledged for access to facilities used in this work.application/pdfen-AU© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim201910.1002/pssr.2019000632020-07-06