Coating of gold nanoparticles made by pulsed laser ablation in liquids with silica shells by simultaneous chemical synthesis
文献信息
Turkka Salminen, Mari Honkanen, Tapio Niemi
Coating of gold nanoparticles with silica shells by the well known Stöber-method requires the use of additional coupling agents to seed the growth of the shell as gold does not form a native oxide. Here we report a novel single-step process to create the gold nanoparticles directly into a mixture of tetraethyl orthosilicate and a catalyst by means of pulsed laser ablation in liquids. We observe that good silica shells are achieved only when all of the reagents are present during the production of the nanoparticles. Experiments with two different laser wavelengths: 515 nm and 1030 nm, show that the formation of the shell is efficient only with the laser wavelength close to the plasmon resonance of the gold nanoparticles. We propose a model indicating that the shell formation is initiated by laser-induced heating of the particles.
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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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