Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/103623
Author(s): azevedo, j.
Sousa, CT
ventura, j.
Arlete Apolinário
Adélio Mendes
João Araújo
Title: Ultra-long Fe nanowires by pulsed electrodeposition with full filling of alumina templates
Issue Date: 2014
Abstract: With the increasing demand for high quality methods for the fast fabrication of extremely high aspect ratio nanoparticles, the research for efficient, low-cost and simple techniques has become fundamental. A promising approach on the synthesis of these materials is here addressed. Pulsed electrodeposition in porous anodic alumina templates was improved enabling, for the first time, a simple and cost effective fabrication method for vertically aligned nanomaterials with aspect ratios never reported with this method. Iron nanowires were electrodeposited and the effect of electrolyte molar concentration, temperature and stirring, pulse shape and barrier layer thickness on the deposition quality was investigated to potentially increase the template filling and the nanowires length. The electrodeposition temperature and current density were also found to be determinant parameters affecting NWs crystallography. A methodology of surface response design of experiment was conducted to retrieve the optimum values for the deposition parameters. With the determined optimized process, we were able to obtain filling ratios up to 93% and aspect ratios over 10 times higher than previous reports for an alternating current method. The high deposition homogeneity combined with the simplicity of the pulsed deposition method, can open new opportunities for the nanofabrication of nanowires. © 2014 IOP Publishing Ltd.
URI: https://repositorio-aberto.up.pt/handle/10216/103623
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projectos de I&DT em Todos os Domínios Científicos/PTDC/EQU-EQU/115614/2009/Síntese e caraterização de novos fotocatalisadores compósitos de TiO2-grafeno: aplicação no abatimento focotacalítico de NOx e fotoeletrólise da água para produção de hidrogénio/PTDC/EQU-EQU/115614/2009
info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projectos de I&DT em Todos os Domínios Científicos/PTDC/EQU-EQU/107990/2008/Células fotoelectroquímicas para produção de hidrogénio a partir de energia solar/H2Solar
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FCUP - Artigo em Revista Científica Internacional
FEUP - Artigo em Revista Científica Internacional
REIT - Artigo em Revista Científica Internacional

Files in This Item:
File Description SizeFormat 
185668.pdf
  Restricted Access
Artigo original publicado1.44 MBAdobe PDF    Request a copy from the Author(s)
185668.1.pdfPost-Print version1.17 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.