Use of a surface acoustic wave device for investigation of water adsorption on NaCl
文献信息
Mattias Hallquist, Noemi B. Petrucci, Christopher Kreuzer, Victor P. Ostanin, R. Anthony Cox
A new method for measurement of water adsorption on thin films of inorganic salts using a surface acoustic wave (SAW) device is described. Mass changes on the SAW chip were detected as a phase shift in an 83 MHz acoustic wave, measured using an electrical delay line. It was shown that coating of the sensor with polycrystalline NaCl can be achieved without appreciable loss of sensitivity for detection of the small changes in mass loading due to water adsorption. Reproducible adsorption isotherms were measured which agreed quantitatively with isotherms measured by conventional methods. There are indications that the adsorption of water on thin polycrystalline films at high humidities differs from that on bulk and single surface crystals. The SAW device can in principle be used to characterise a whole range of surfaces of interest to atmospheric chemistry, such as sea salt, sulfates, mineral dust or low volatile organics, in a relatively simple fashion, provided the substrate can be deposited in a suitable thin film or layer.
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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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