| 초록 |
Understanding of polymer/metal interface is particularly important to various industrial needs, since polymers are often used in thin film geometries in such applications as low-k dielectric interlayers. A recent study on the interaction between polymer and gold nanoparticles, showed that substantial diffusion of gold particle in such a polymer matrix could occur, a serious problem for interfacial marking applications. The rheological properties of the gold nanoparticles in the polymer matrix, including molecular mobility and viscosity, were found to vary substantially due to interactions between the polymer chains and the metal particles. It seems that the interplay of many factors, such as particle size, effective cross-linking of polymers, and their interactions at the interface, will determine the interfacial properties of metal particles at the polymer thin film. One of many ways to modify the interaction parameter of a polymer significantly is to vary the electrostatic interaction parameter of polyelectrolytes. Furthermore, thin ionomer films are technologically important since they are often used as substrates together with gold-fabricated nanostructures for the many biological sensors. By changing the sulfonation level, PS can be modified to negatively charged PS. The sulfonation levels were varied from 0% to 15%. Since charged monomer has strong adsorption tendency to gold surface, we could systemically study the electrostatic effects. In this poster, we will present that the structural evolution at the polymer/gold interface and their interaction parameter measured by x-ray reflectivity and TEM. |
