Solvothermal synthesis of the ternary semiconductor AInS2 (A=Na, K) nanocrystal at low temperature

Lamella and parallelogram thin flake NaInS2, KInS2 nanocrystals were prepared by the reaction between Na2S·9H2O or K2S and InCl3·4H2O via solvothermal method at low temperature. The result of electron diffraction (ED) analysis confirmed that lamella of NaInS2 nanocrystal grows along the directions perpendicular to the 〈0 0 1〉 zone axis. The reaction temperature played a key role in the formation of NaInS2 nanocrystal. Meanwhile, the process of NaInS2 nanocrystal growth was discussed.