1. IntroductionC. Lamberti2. Ab-initio studies of structural and electronic propertiesM. Peressi, A. Baldereschi and S. Baroni3. Electrical and optical properties of heterostructures4. Strain and composition determination in semiconducting heterostructures by high resolution X-ray diffractionC. Ferrari and C. Bocchi5. Transmission Electron Microscopy techniques for imaging and composition evaluation in Semiconductor HeterostructuresL. Lazzarini, L. Nasi and V. Grillo6. Accessing structural and electronic properties of semiconductor nanostructures via photoluminescenceS. Sanguinetti, M. Guzzi and M. Gurioli7. Power dependent cathodoluminescence in III-Nitrides heterostructures: from internal field screening to controlled band gap modulationG. Salviati, L. Lazzarini, N. Armani, F. Rossi and V. Grillo8. Raman SpectroscopyD. Wolverson9. X-ray absorption fine structure spectroscopyF. Boscherini10. Nanostructures in the light of synchrotron radiation: surface sensitive x-ray techniques and anomalous scatteringT. Metzger, J. Eymery, V. Favre-Nicolin, G. Renaud, H. Renevier and T. Schülli11. Grazing Incidence Diffraction Anomalous Fine Structure to study the structural properties of semiconductor nanostructuresM. Grazia Proietti, J. Coraux and H. Renevier12. The Role of Photoemission Spectroscopies in Heterojunction ResearchG. Margaritondo13. EPR of interfaces and nanolayers in semiconductor heterostructuresA. Stesmans and V.V. Afans'ev