| 초록 |
Gold nanoparticles are attracting a great attention due to their fundamental importance and potential applications in optics, electronics, catalysis, etc. However, the colloidal gold has a fatal defect in that it is easily deformed in an aqueous media. Therefore, a number of different methods have been proposed to prepare a stable gold system, such as chemical reduction, elecrolysis, and chemical deposition. In the present contribution, a new approach is proposed to produce a metal/polymer colloidal system where the colloidal gold particles are in-situ deposited onto surface characteristics-modulated polymer microsphere. The polymer system selected is poly(ethylene glycol dimethacrylate) [poly(EGDMA)] microspheres. Our particular interest is concentrated on the effect of their surface area and surface functionality (-CN) on the anchoring of colloidal gold particles. The surface structure is changed successfully by controlling the network phase separation during the polymerization in the suspended monomer droplets. The focus of this study is to demonstrate the importance of surface structure of polymer microsphere to get a uniform deposition of colloidal gold particles into the inner surfaces. In the macroscopic ananlysis, it was found that the gold was well deposited in the inner pore channel. |
