Keywords: Al-nanoparticles; Iron oxide/-hydroxide nanoscaled matrix; Coprecipitation; Nanothermite; Surface activation; Thermite reactivity; RDX; 1,3,5-trinitroperhydro-1,3,5-triazine; Al/Al2O3; passivated aluminum nanoparticle; XRPD; X-ray powder diffraction; TEM;