Experimental determination of the diameter-dependent wettability of carbon nanotubes as studied using atomic force microscopy
Literature Information
Konan Imadate, Kaori Hirahara
The wettability of individual carbon nanotubes (CNTs) with <20 nm diameter was experimentally evaluated on the basis of the Wilhelmy method via atomic force microscopy to visualize the effect of the nanometer-scale curvature of a solid surface on the solid–liquid and solid–vapor interface tensions. The experimental results showed the deviation of force owing to wetting for diameters <10 nm. In particular, for nanotubes with <4.5 nm diameter, the wettability tended to differ from its previously predicted behavior. The diameter-dependent wettability seen below 10 nm can be attributed to the interaction between the curved solid surface and the curved liquid adsorption layer formed on the CNT surface. In the scale where the radius of curvature is less than 5 nm, the thermodynamics perspective may not be valid, and thus, an atomistic perspective must be considered.
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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.














