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Mo nanowalls with high and stable field emission properties have been synthesized by a thermal vapor deposition method, and it shows strong immunity to the in situ oxidizing environment. After pure O2 exposure, the degradation of emission current was only 42.31% when the vacuum pressure increased from 2×10−6 Pa to 5×10−4 Pa. For those exposures over 1×10−3 Pa, the cathode's total recover was still...
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