The vibrational dynamics of solid-state matter, known as phonon density of state (PDOS), govern many thermodynamic and elastic properties which are usually well known for bulk material. However the effect of reduced dimensionality on the PDOS of a material is not clear. It is fundamental to know how the thermodynamic and elastic properties change in nanostructures since nowadays they play a crucial role in applications, such as microelectronics. Using the isotope sensitive technique of nuclear resonant inelastic x-ray scattering (NRIXS), we have investigated the anisotropy in the phonon density of states of 57Fe nanowires embedded in an Al2O3 matrix. However, the isotope selectivity of the technique prevents understanding the effects of the matrix on the vibrational dynamics of the nanowires. We therefore need a technique to probe the vibration of the complete system (nanowires + matrix). The goal of the experiment is to investigate the effects of a matrix on the atomic vibrations of the confined iron nanowires and compare it to what is obtained by NRIXS.