Next Article in Journal
A Review on the Synthesis and Applications of Mesostructured Transition Metal Phosphates
Previous Article in Journal
Hardness and Elastic Modulus on Six-Fold Symmetry Gold Nanoparticles
Article Menu

Export Article

Open AccessArticle
Materials 2013, 6(1), 206-216; doi:10.3390/ma6010206

Comparative Study of Loading of Anodic Porous Alumina with Silver Nanoparticles Using Different Methods

1
Department of Nanophysics, Istituto Italiano di Tecnologia, via Morego 30, Genova I-16163, Italy
2
University of Genova, viale Causa 13, Genova I-16145, Italy
3
Department of Nanochemistry, Istituto Italiano di Tecnologia, via Morego 30, Genova I-16163, Italy
*
Author to whom correspondence should be addressed.
Received: 24 October 2012 / Revised: 6 December 2012 / Accepted: 6 January 2013 / Published: 14 January 2013
View Full-Text   |   Download PDF [422 KB, uploaded 14 January 2013]   |  

Abstract

Three different routes were used to infiltrate the pores of anodic porous alumina templates with silver nanoparticles, selected as an example of a bioactive agent. The three methods present a continuous grading from more physical to more chemical character, starting from ex situ filling of the pores with pre-existing particles, moving on to in situ formation of particles in the pores by bare calcination and ending with in situ calcination following specific chemical reactions. The resulting presence of silver inside the pores was assessed by means of energy dispersive X-ray spectroscopy and X-ray diffraction. The number and the size of nanoparticles were evaluated by scanning electron microscopy of functionalized alumina cross-sections, followed by image analysis. It appears that the best functionalization results are obtained with the in situ chemical procedure, based on the prior formation of silver ion complex by means of ammonia, followed by reduction with an excess amount of acetaldehyde. Elution of the silver content from the chemically functionalized alumina into phosphate buffer saline has also been examined, demonstrating a sustained release of silver over time, up to 15 h.
Keywords: anodic porous alumina; nanoparticles; silver; filling factor; elution anodic porous alumina; nanoparticles; silver; filling factor; elution
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Thorat, S.; Diaspro, A.; Scarpellini, A.; Povia, M.; Salerno, M. Comparative Study of Loading of Anodic Porous Alumina with Silver Nanoparticles Using Different Methods. Materials 2013, 6, 206-216.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top