One-pot synthesis of hollow nickel phosphide nanoparticles with tunable void sizes using triphenylphosphine

Multifunctional nickel phosphide nanoparticles with hollow nanostructures are very attractive for their great potential in various applications. A facile one-pot synthetic technique was presented for preparing hollow Ni₂P nanoparticles with tunable void sizes using triphenylphosphine as a lower-price phosphorus source in mild temperature organic solution. Structural morphology and magnetic property of time-dependent products demonstrated the fabrication of interior voids induced by nanoscale Kirkendall effect. Void sizes tunable from about 5 to 60 nm in diameter were obtained using varied triphenylphosphine concentrations, showing that the triphenylphosphine can serve as a reactive surfactant to tune and heighten the void capacity based on the nanoscale Kirkendall effect.