TAILIEUCHUNG - Báo cáo vật lý: "Effects of Electrolyte Natures on the Formation of Well-Ordered Titania Nanotubes Produced Via Anodisation"

Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Effects of Electrolyte Natures on the Formation of Well-Ordered Titania Nanotubes Produced Via Anodisation | Journal of Physical Science Vol. 20 2 61-71 2009 61 Effects of Electrolyte Natures on the Formation of Well-Ordered Titania Nanotubes Produced Via Anodisation Srimala Sreekantan and Ling Mee Hung School of Materials and Mineral Resource Engineering Engineering Campus Universiti Sains Malaysia 14300 Nibong Tebal Pulau Pinang Malaysia Corresponding author srimala@ Abstract The formation of well-ordered titania nanotubes is achieved by electrochemical anodisation under specific experimental conditions. In the present work the formation of titania nanotubes on titanium substrates is investigated in two different electrolytes Na2SO4 and NH4 2SO4. The amount of fluoride was varied from to 5 wt . Scanning electron microscope SEM X-Ray diffraction XRD and Energy Dispersive X-ray EDX surface analyses were carried out to characterise the well-ordered titania nanotubes. The results show that the composition of electrolytes drastically influenced the final morphology of the titania nanotubes. Titania nanotubes with various diameters in the range of 20-100 nm and lengths of ym were obtained by tailoring the electrochemical conditions during titanium anodisation. From the SEM images it was evident that the well-ordered regular porous structure consists of pore arrays with a uniform pore diameter. It was also clear that pore mouths were opened on the top of the layer while the tubes were closed by the presence of a layer of titania on the bottom of the structure. Here in we discuss the influence of different electrolyte compositions on the structure of well-ordered titania nanotubes in detail. We furthermore show that the nanotubes consist of titania and that they remain unchanged when annealed. Keywords titania nanotubes anodisation electrolyte composition fluoride annealing Abstrak Nanotiub titania tersusun teratur dihasilkan dengan mengunakan kaedah penganodan elektrokimia dalam suatu keadaan eksperimen tertentu. Dalam kajian ini pembentukan nanotiub .

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