Synthesis of faceted and cubic Ag2S nanocrystals in aqueous solutions

Large-scale synthesis of bismuth sulfide nanorods by microwave irradiation

“…Small organic molecules which can slowly release S 2− by hydrolysis are especially useful in the controlled synthesis of Bi 2 S 3 nanomaterials because of their special chemical properties and self-assembling functions [75]. It was reported that the S 2− ions generate slowly due to the cleavage of C S bond of Tu [76]. During this reaction, the Tu gradually decomposes to release S 2− ions slowly as the temperature increases, preventing the production of too many free S 2− ions.…”

Hybrid Ag2S–Ag3SBr superionic conductor nanoparticles and their large-scale ordered arrays

“…CTAB played a similar role as before in preventing particle aggregation and obtaining monodisperse Ag 2 S nanoparticles [10][11][12]. When the S 2 O 3 2À /Ag + molar ratio was increased to 3.2:1, abundant S was produced and partially reacted with silver to give amorphous Ag 2 S [6,10,11], which further reacted with AgBr (Br À from CTAB) to form small crystalline Ag 3 SBr domains.…”

Synthesis via an organic molten salt solvent route and characterization of PbS nanocrystals

“…Therefore, it is believed that the thiourea plays an important role on growth of four petals flowers-like PbS nanocrystals. Here the thiourea can act as not only sulfur source, but also a structural directing agent [30] and it can be adsorbed selectively on some specific facets of crystals and consequently control crystal growth direction. Figure 6 shows the possible mode of formation of the four petals flowers-like PbS nanocrystals.…”

“…It is well-known that the thiourea can be used as a structural directing agent [30] and the growth rates of some surfaces covered by the thiourea would be greatly reduced. So those of surfaces uncovered by the thiourea kept normal growth rates, which leads to a highly isotropy growth of PbS nanocrystal to form PbS nanospheres.…”