Controlled synthesis of high-quality nickel sulfide chain-like tubes and echinus-like nanostructures by a solution chemical route

Chain-like NiS tubes and echinus-like nickel sulfide (Ni₃S ₂) nanostructures were synthesized successfully by a solution chemical route. The growth models of these two materials and the most possible mutation process between these two different morphologies are discussed. The temperature and field dependent magnetizations, M(T) and M(H), show that both the samples have a very weak ferromagnetism and exhibit a strong paramagnetic response in a high applied field.