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- W4384455718 abstract "MXenes, a family of 2D transition-metal carbides and nitrides, have excellent electrical conductivity and unique optical properties. However, MXenes oxidize in ambient conditions, which is accelerated upon heating. Intercalation of water also causes hydrolysis accelerating oxidation. Developing new tools to readily characterize MXenes' thermal stability can enable deeper insights into their structure-property relationships. Here, in situ spectroscopic ellipsometry (SE) is employed to characterize the optical properties of three types of MXenes (Ti3 C2 Tx , Mo2 TiC2 Tx , and Ti2 CTx ) with varied composition and atomistic structures to investigate their thermal degradation upon heating under ambient environment. It is demonstrated that changes in MXene extinction and optical conductivity in the visible and near-IR regions correlate well with the amount of intercalated water and hydroxyl termination groups and the degree of oxidation, measured using thermogravimetric analysis. Among the three MXenes, Ti3 C2 Tx and Ti2 CTx , respectively, have the highest and lowest thermal stability, indicating the role of transition-metal type, synthesis route, and the number of atomic layers in MXene flakes. These findings demonstrate the utility of SE as a powerful in situ technique for rapid structure-property relationship studies paving the way for the further design, fabrication, and property optimization of novel MXene materials." @default.
- W4384455718 created "2023-07-16" @default.
- W4384455718 creator A5008877053 @default.
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- W4384455718 date "2023-07-16" @default.
- W4384455718 modified "2023-10-17" @default.
- W4384455718 title "The Evolution of MXenes Conductivity and Optical Properties Upon Heating in Air" @default.
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- W4384455718 doi "https://doi.org/10.1002/smtd.202300568" @default.
- W4384455718 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37454348" @default.
- W4384455718 hasPublicationYear "2023" @default.