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: Fabrication of complete titania nanoporous structures via electrochemical anodization of Ti | Ali et al. Nanoscale Research Letters 2011 6 332 http content 6 1 332 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Fabrication of complete titania nanoporous structures via electrochemical anodization of Ti Ghafar All Chong Chen Seung Hwa Yoo Jong Min Kum and Sung Oh Cho Abstract We present a novel method to fabricate complete and highly oriented anodic titanium oxide ATO nano-porous structures with uniform and parallel nanochannels. ATO nano-porous structures are fabricated by anodizing a Ti-foil in two different organic viscous electrolytes at room temperature using a two-step anodizing method. TiO2 nanotubes covered with a few nanometer thin nano-porous layer is produced when the first and the second anodization are carried out in the same electrolyte. However a complete titania nano-porous TNP structures are obtained when the second anodization is conducted in a viscous electrolyte when compared to the first one. TNP structure was attributed to the suppression of F-rich layer dissolution between the cell boundaries in the viscous electrolyte. The structural morphologies were examined by field emission scanning electron microscope. The average pore diameter is approximately 70 nm while the average inter-pore distance is approximately 130 nm. These TNP structures are useful to fabricate other nanostructure materials and nanodevices. Introduction Macro- nano- and meso-porous structure gained a lot of attention of the scientific community in the last few decades due to their unique properties and potential application in various fields 1-4 . Particular attention was paid to the self-organized porous materials due to their self-ordered structure and ease of fabrication. One of the most extensively investigated porous materials is porous anodic alumina PAA 5 . Highly ordered nano-porous structure can be fabricated on pure aluminum under optimized conditions via two-step electrochemical anodization 6 . PAA are .
