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Low-field electron emission is obtained from the pinaster-like MoO2 nanoarrays.The tu-on field of the pinasterlike MoO2 nanoarrays is found to be as low as 2.39V/μm with the current density of 10μA/cm2.The enhancement factor is extracted to be 3590 from the Fowler-Nordheim plot.These excellent emission properties are attributed to the special structure of the pinaster-like MoO2 nanoarrays and confirmed by the calculation in the frame of the two -stage model.Our results show that the pinaster-like MoO2 nanoarrays are promising candidate in realizing field emission displays.