Thermal expansion coefficient of few-layer MoS₂ studied by temperature-dependent Raman spectroscopy.

ABSTRACT: The thermal expansion coefficient is an important thermal parameter that influences the performance of nanodevices based on two-dimensional materials. To obtain the thermal expansion coefficient of few-layer MoS₂, suspended MoS₂ and supported MoS₂ were systematically investigated using Raman spectroscopy in the temperature range from 77 to 557 K. The temperature-dependent evolution of the Raman frequency shift for suspended MoS₂ exhibited prominent differences from that for supported MoS₂, obviously demonstrating the effect due to the thermal expansion coefficient mismatch between MoS₂ and the substrate. The intrinsic thermal expansion coefficients of MoS₂ with different numbers of layers were calculated. Interest

SUBMITTER: Lin Z 

PROVIDER: S-EPMC8007611 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature