Acoustic-like dynamics of amorphous drugs in the THz regime

TitleAcoustic-like dynamics of amorphous drugs in the THz regime
Publication TypeJournal Article
Year of Publication2013
AuthorsPogna, EAA, Rodríguez-Tinoco, C, Krisch, M, Rodríguez-Viejo, J, Scopigno, T
JournalScientific Reports
Volume3
Start Page2518
Abstract

The high frequency dynamics of Indomethacin and Celecoxib glasses has been investigated by inelastic x-ray scattering, accessing a momentum-energy region still unexplored in amorphous pharmaceuticals. We find evidence of phonon-like acoustic dynamics, and determine the THz behavior of sound velocity and acoustic attenuation. Connections with ordinary sound propagation are discussed, along with the relation between fast and slow degrees of freedom as represented by non-ergodicity factor and kinetic fragility, respectively.

URLhttp://www.nature.com/srep/2013/130830/srep02518/full/srep02518.html
DOI10.1038/srep02518
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