Metal clusters in plasma polymer matrices Part II. Silver clusters

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Publication Date
DOI 10.1039/A904175C
Impact Factor 3.676
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Abstract

By means of an inert gas evaporation technique in combination with a simultaneous plasma polymerisation process silver clusters have been prepared within plasma polymer matrices from vinyltrimethylsilane (VTMS) with mean diameters between 1.3 and 4.5 nm and from tetraethoxysilane (TEOS) between 4.8 and 6.2 nm, respectively. The materials were characterised by transmission electron microscopy (TEM), electron diffraction (ED), X-ray photoelectron spectroscopy (XPS) and UV-visible spectrophotometry. From the decrease of the Ag-lattice parameter with decreasing size of the silver clusters a value of the surface stress coefficient fss=5.4±1.1 N m-1 could be deduced. UV-visible spectrophotometry of Ag–VTMS composites revealed a damping layer around the metal clusters, which prevents oxidation of the silver particles. A strong blue shift of the plasmon resonance frequency from λmax=557 nm to λmax=450 nm with decreasing filling factor could be observed for the Ag–TEOS composites. The plasma polymer matrix from tetraethoxysilane monomer shows a strong chemical damping of the surface plasmon resonance. The measured UV-visible spectra were fitted with the Maxwell-Garnett theory.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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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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