Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Single-crystalline nanoporous Nb2O5 nanotubes | Liu et al. Nanoscale Research Letters 2011 6 138 http content 6 1 138 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Single-crystalline nanoporous Nb2O5 nanotubes Jun Liu Dongfeng Xue Keyan Li Abstract Single-crystalline nanoporous Nb2O5 nanotubes were fabricated by a two-step solution route the growth of uniform single-crystalline Nb2O5 nanorods and the following ion-assisted selective dissolution along the 001 direction. Nb2O5 tubular structure was created by preferentially etching 001 crystallographic planes which has a nearly homogeneous diameter and length. Dense nanopores with the diameters of several nanometers were created on the shell of Nb2O5 tubular structures which can also retain the crystallographic orientation of Nb2O5 precursor nanorods. The present chemical etching strategy is versatile and can be extended to different-sized nanorod precursors. Furthermore these as-obtained nanorod precursors and nanotube products can also be used as template for the fabrication of 1 D nanostructured niobates such as LiNbO3 NaNbO3 and KNbO3. Introduction Nanomaterials which have received a wide recognition for their size- and shape-dependent properties as well as their practical applications that might complement their bulk counterparts have been extensively investigated since last century 1-8 . Among them one-dimensional 1D tubular nanostructures with hollow interiors have attracted tremendous research interest since the discovery of carbon nanotubes 1 9-14 . Most of the available single-crystalline nanotubes structurally possess layered architectures the nanotubes with a non-layered structure have been mostly fabricated by employing porous membrane films such as porous anodized alumina as template which are either amorphous polycrystalline or only in ultrahigh vacuum 13 14 . The fabrication of single-crystalline semiconductor nanotubes is advantageous in many potential nanoscale electronics optoelectronics .
