Based on a solvothermal synthesis with N,N-dimethylformamide used as solvent and porous anodic alumina oxide as a template, a highly ordered bismuth nanohole array was fabricated by a one-step replication of the honeycomb structure of anodic porous alumina. In the high temperature and pressure condition maintained in the solvothermal system, reduction of the bismuth metal from bismuth nitrate followed by the replication of the porous alumina structure resulted in a honeycomb metallic structure. The metal nanohole array of the film has a uniform, closely packed honeycomb structure approximately about 200 nm in diameter and 100 nm thick. X-ray diffraction (XRD), Energy dispersive X-ray (EDX) and high resolution scanning electron microscopy (SEM) have been used to characterize the bismuth nanohole structure.
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