| 초록 |
In recent years, metal nanoparticles have been investigated extensively due to their novel properties, which differ from the bulk metals. Among them, silver nanoparticles have attracted considerable interest as catalysis and antibacterial materials, and have been used in photochemical reactions and biological analysis based on their surface-enhanced Raman effects. To prepare the silver nanoparticles, various methods have been developed, such as reduction by chemical reductants or radiation in reverse micelles or microemulsions, and thermal decomposition in organic solvents. We report here a simple and spontaneous preparation of silver nanoparticles on polymer supports without any reduction treatment. Several PEG macromers, which have different functional groups and chain lengths, were introduced to 2-chlorotrityl chloride polystyrene (CTC) resins. The PEG chains served not only as stabilizers but also as reductants. The silver nanoparticles formed in the polymer matrixes were characterized using transmission electron microscopy (TEM) after cleavage from the polymer supports by mild acid treatment. The polymer matrixes played important roles in reducing the size distribution of the silver nanoparticles. |
