Temperature dependence of phonon properties in CVD MoS2 nanostructures – a statistical approach
文献情報
Jarosław Judek, Arkadiusz P. Gertych, Karolina Czerniak, Mariusz Zdrojek
In this paper, we report the results of Raman measurements on various molybdenum disulfide (MoS2) nanostructures grown by the chemical vapor deposition (CVD) method on a typical Si/SiO2 substrate. The phonon properties investigated include the positions, widths, and intensities of the E2g and A1g modes and the derivative of the mode positions with respect to the temperature in the 300–460 K range. Our results give new insight into changes in phonon energies in response to different disturbances and show that changes induced by the temperature are similar to the changes induced by stress, making these two factors hardly resolvable in the ħωA1g–ħωE2g coordinate system. We prove that all our samples are weakly coupled to the substrate; thus, the presented results almost purely illustrate the effect of the temperature and thickness. The much stronger coupling to the substrate, however, can explain the high variation in the data reported in the literature. The statistical approach applied makes our results highly reliable and allows proper uncertainty assessment of the obtained results, which is helpful when comparing our results to the results reported by other authors.
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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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