Optimization of the bio-functionalized area of magnetic biosensors Edoardo Albisetti, Daniela Petti, Francesco Damin, Marina Cretich, Marta Bagnati, Laura Sola, Marcella Chiari and Riccardo Bertacco Eur. Phys. J. B, 86 6 (2013) 261 Published online: 10 June 2013 DOI: 10.1140/epjb/e2013-30676-4