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Uniform Co3O4 nanocubes have been prepared via an effective one-pot hydrothermal method. Sphere-shape Co3O4 nanomaterials can be synthesized by varying the concentration of Co(NO3)2·6H2O and NaOH without the utilization of surfactants. Co3O4 nanocubes and Co3O4 nanospheres show regular geometry structure with diameters of 250nm and 300nm, respectively. Gas sensors based on different Co3O4 nanostructured...
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