Photoacoustic investigation of maghemite-based BSA nanocomposite L. B. Silveira, J. G. Santos, A. C. Oliveira, B. M. Lacava, A. C. Tedesco and P. C. Morais Eur. Phys. J. Special Topics, 153 (2008) 357-360 Published online: 12 March 2008 DOI: 10.1140/epjst/e2008-00461-1