Metal clusters in plasma polymer matrices Part IV. Electrical properties of Ag clusters
Literature Information
Michael Wark, Alfred Baalmann, Ulrich Simon, Nils Jaeger
Plasma polymer thin films with small isolated silver particles and high volume fractions were prepared by simultaneous plasma polymerisation of hexamethyldisiloxane and metal evaporation. The optical properties of the films were determined by UV–vis spectrophotometry and the electrical behaviour by electrical transport measurements and by impedance spectroscopy. Thermal annealing causes a dramatic change in the DC and AC conductivity, which can be explained by the formation of percolation paths and the reduction of cluster–matrix interactions. UV–vis spectra of Ag/HMDSO composites revealed an additional absorption in the long wavelength region during the annealing process. This effect can be explained by increasing electromagnetic coupling between neighbouring clusters. The results can be simulated by a microscopic model of the embedded metal clusters, in which the isolated spherical clusters are coated by a thin dielectric layer, which prevents agglomeration but allows an electron exchange between the clusters due to an electron hopping process.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.













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