Facile Synthesis of Semiconductor and Noble Metal Nanocrystals in High-Boiling Two-Phase Liquid/Liquid Systems

摘要

Novel high-boiling liquid/liquid systems were introduced for the synthesis of semiconductor and noble metal nanocrystals.Polyols and long-chain hydrocarbons were utilized to form such two-phase systems.Because of the high-boiling nature,these systems may be conveniently employed for nanocrystal synthesis at relatively high temperatures (under the normal pressure) and thus are useful alternatives to toluene/water.CdS and Ag nanocrystals were successfully prepared in an octadecene (ODE)/glycerol system via interfacial processes,demonstrating the effectiveness of this class of two-phase systems.As-prepared nanocrystals had hydrophobic surfaces and were dispersed in the ODE phase of the system.Furthermore,a congeneric two-phase system of liquid paraffin/glycerol was also found to be effective for the synthesis of CdS and Ag nanocrystals.