Series of Raman spectra taken at various temperatures of CuO nanowires with a mean average diameter <d> = 120 ± 8 nm. Two main phonon modes corresponding to the Ag and Bg1 symmetries, respectively, are revealed. As the temperature was reduced to143 K, a well-defined peak at 238 cm−1 developed, signifying the spin-phonon coupling.
Shih et al. Nanoscale Research Letters 2013 8:398 doi:10.1186/1556-276X-8-398