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Báo cáo hóa học: "Cobalt and Nickel Nanopillars on Aluminium Substrates by Direct Current Electrodeposition Process"

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: Research Cobalt and Nickel Nanopillars on Aluminium Substrates by Direct Current Electrodeposition Process | Nanoscale Res Lett 2009 4 1021-1028 DOI 10.1007 S11671-009-9351-5 NANO EXPRESS Cobalt and Nickel Nanopillars on Aluminium Substrates by Direct Current Electrodeposition Process A. Santos L. Vojkuvka J. Pallares J. Ferre-Borrull L. F. Marsal Received 26 March 2009 Accepted 14 May 2009 Published online 31 May 2009 to the authors 2009 Abstract A fast and cost-effective technique is applied for fabricating cobalt and nickel nanopillars on aluminium substrates. By applying an electrochemical process the aluminium oxide barrier layer is removed from the pore bottom tips of nanoporous anodic alumina templates. So cobalt and nickel nanopillars are fabricated into these templates by DC electrodeposition. The resulting nanostructure remains on the aluminium substrate. In this way this method could be used to fabricate a wide range of nanostructures which could be integrated in new nanodevices. Keywords Nanoporous anodic alumina membranes Transfer mask Metallic nanopillars Electrodeposition Introduction The template synthesis of nanostructures has attracted scientists attention in the last years owing to their possible application in fabricating high-density magnetic storage memories 1 and nanoelectrodes for electrochemical processes in nanometric range 2 . In addition this kind of nanostructures could be integrated in smaller and smaller devices such as filters 3 or sensors 4 . In terms of nanostructure fabrication choosing a suitable template is one of the most crucial factors in the synthesis process A. Santos L. Vojkuvka J. Pallares J. Ferre-Borrull L. F. Marsal H Departament d Enginyeria Electronica Electrica i Automatica Universitat Rovira i Virgili Avda. Pai sos Catalans 26 43007 Tarragona Spain e-mail lluis.marsal@urv.cat because any defect in the template structure could be transferred to the resulting nanostructure by replication. So far several materials have been used as template for synthesizing nanowires or nanotubes. Nanoporous anodic alumina membranes NAAMs .