Shape and size dependence of the surface plasmon resonance of gold nanoparticles studied by Photoacoustic techniqueT. A. El-Brolossy, T. Abdallah, M. B. Mohamed, S. Abdallah, K. Easawi, S. Negm and H. TalaatEur. Phys. J. Special Topics, 153 (2008) 361-364DOI: https://doi.org/10.1140/epjst/e2008-00462-0