Abstract
A facile, low temperature and single step hydrothermal method has been used to fabricate well defined manganese oxide (MnO2) nanorods over Si substrate. The structural and morphological studies reveal the formation of crystalline MnO2 nanostructures. The diameter of the MnO2 nanorods is estimated to be ~100 nm, with length in several micrometers. Field-emission properties of the as-synthesized MnO2 nanorods are investigated. The turn on field required to draw emission of 0.1 µA/cm2 current was observed to be ~ 3.2 V/μm and threshold field (corresponding to emission current density of 1 µA/cm2) was found to be 5.1 V/μm. The emission current was observed to be stable for more than three hours at a preset value 1 µA. These results are helpful for the design, fabrication and optimization of integrated field emitters using 1D nanostructure as cold cathode material.
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