Molecular precursor route for the phase selective synthesis of α-MnS or metastable γ-MnS nanomaterials for magnetic studies and deposition of thin films by AACVD

Unravelling the intricacies of solvents and sulfur sources in colloidal synthesis of metal sulfide semiconductor nanocrystals

“…In literature this reaction is thought to happen for metals in +II state like Fe, Ni, Cd, Zn, and Mn. 111,112,[114][115][116] If both backbones of DTC are amido exchanged, as shown in the red box, also a proton transfer from the amido backbone to one of the sulfurs of DTC happen and subsequent elimination of isothiocyanate. Dimerization results in two metal centres with thiol bridges.…”

“…This decomposition process is thought to happen for elements in +II state like Cd, Zn, Mn. 111,112,[114][115][116] Hollingsworth et al investigated the differences in nickel(II) dithiocarbamate decomposition for two different primary amines, OLA and n-hexylamine, experimentally and theoretically. 111 Via density functional theory (DTF) calculations they found that the exchange process proceeds via a proton transfer from the primary amine to the amide in a metathesis-like four membered transition state.…”

Colloidal Synthesis of γ-MnS Nanorods with Uniform Controlled Size and Pure ⟨002⟩ Growth Direction

“…MnS is one of the most important metal chalcogenide semiconductors with a wide bandgap, which has great potential applications in short wavelength photonics, optoelectronics, and magnetics. − MnS exists in three crystalline forms such as the green stable rock salt α-phase, pink metastable zinc blende β-phase, and pink metastable wurtzite γ-phase. Besides the most reported stable α-MnS nanostructures, ,, the metastable γ-MnS nanostructures had been also reported via the solvent thermal and the chemical vapor deposition methods. − Recently, the seeds-mediated method was also used to synthesize γ-MnS nanostructures, where the preformed Ag 2 S and Cu 1.94 S nanoparticles often acted as the seeds. − And the cation exchange reaction was used to form γ-MnS by employing djurleite Cu 1.94 S nanoparticles as the starting templates . However, it was still challenging to control the growth direction of metastable γ-MnS nanostructures at a large scale, which was significant for application of the anisotropic nanomaterials.…”

“…9−11 MnS exists in three crystalline forms such as the green stable rock salt α-phase, pink metastable zinc blende β-phase, and pink metastable wurtzite γ-phase. Besides the most reported stable α-MnS nanostructures, 9,10,12 the metastable γ-MnS nanostructures had been also reported via the solvent thermal and the chemical vapor deposition methods. 12−15 Recently, the seeds-mediated method was also used to synthesize γ-MnS nanostructures, where the preformed Ag 2 S and Cu 1.94 S nanoparticles often acted as the seeds.…”