Pedro J Rivero*, Aitor Urrutia, Javier Goicoechea, Carlos R Zamarreño, Francisco J Arregui and Ignacio R Matías
* Corresponding author: Pedro J Rivero pedrojose.rivero@unavarra.es
Nanoscale Research Letters 2011, 6:305 doi:10.1186/1556-276X-6-305