Compressibility of Nickel Nanoparticle Chain

We perform the high-pressure energy dispersive x-ray diffraction experiments of nickel nanoparticle chain using a synchrotron source under quasi-hydrostatic compression up to 44.7GPa. There is no phase transition over the pressure range. The bulk modulus K₀, the first pressure derivative of bulk modulus K₀' and the volume V₀ are calculated from the pressure--volume data
using the Birch--Murnaghan equation of state. A decrease of compressibility is observed, in agreement with the Hall--Petch effect.