  K(BEDT-TTF)2Cu(NCS)2 has been investigated by Raman scattering in both bulk
and nanoparticle compounds. Phonon modes from 20 to 1600 cm-1 have been
assigned. Focusing on the unexplored low frequency phonons, a plateau in
frequencies is observed in the bulk phonons between 50 and 100 K and assigned
to the signature of the bad metal phase. Nanoparticles of K(BEDT-TTF)2Cu(NCS)2
exhibit anomalies at 50 K associated to the crossover from a bad metal to a
Fermi liquid whose origins are discussed.
