| 초록 |
Copper particles of various sizes are widely used in high catalytic, optical, and electrical conducting properties applications. Solution-based chemical reduction synthesis has been a representative metal particle synthesis method due to its economical and simple characteristics compared to other processes. However, the conventional solution-based techniques, which control the nucleation and growth of copper species, are incompatible with the cost-effective mass production because of the low nucleation rate induced by low concentration precursors. Also, this process requires control of the size by optimizing experimental parameters such as the ratio of chemical additives to the precursor salt, resulting in special arranged synthetic conditions. In general, the nucleation rate is faster at higher precursor concentrations, which means that the particles can be synthesized in large quantities. However, there is no research on the synthesis of copper particles using high-concentration precursors produced. In this study, a solution-based gram-scale production of copper particles was attempted using high concentration metal complex precursors produced from various reducing agents. Under the conditions of room temperature and pressure, the initial nucleation rate and frequency were simply controlled by reducing agents with various reduction potentials. Through this simple process, copper particles with sizes of 70nm, 300nm, and 1.4μm were successfully synthesized and the physicochemical properties were systematically investigated through various analysis methods. |
