On the Electron Phonon Interaction in Trans Polyacetylene

The effect of 1t conducting electrons on the lattice dynamics and on the Resonant Raman cross section in the simplest semiconducting polymer, trans polyacetylene, is discussed. Using the. tight binding approximation and disregarding the electron correlation, explicit expressions for both delocalized force constants and Franck-Condon factors have been worked out as a function of the electron-phonon coupling constant. Phonon frequencies and relative Resonance Raman intensities for the Raman active modes have been calculated and compared with the available experimental data for both trans (CH), and (CD),

Preparazione e caratterizzazione di idrogeli di chitosano e chitosano/acido ialuronico per applicazioni in campo biomedicale

none3Anna Demartini; Marina Alloisio; Carla CunibertiDemartini, Anna; Alloisio, Marina; Cuniberti, CARLA EMILI