Abstract
Standing [111]-oriented crystalline gold nanotube (AuNT) and nanorod (AuNR)arrays using electrochemical deposition through template growth are reported.Segments of single crystal and bamboo-like crystalline AuNR arrays withgrowing direction of [111], having a diameter of 100–150 nm and a length of10 µm, standing perpendicular to Ti metal foil substrates, are synthesized. The as-synthesizedAuNTs and AuNRs are characterized by powder and five circle x-ray diffractometry,UV–visible molecular absorption spectrometry, field emission scanning electron microscopy,and transmission electron microscopy. AuNRs and AuNTs are formed by starting with atube and the wall of the tube gets progressively thicker and eventually sealed upto form nanorods. Optical absorption at 548 and 578 nm wavelength for goldnanotubes and nanorods, respectively, caused by the transverse (width) mode isidentified.
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