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• W2316572938 endingPage "5332" @default.
• W2316572938 startingPage "5326" @default.
• W2316572938 abstract "Monolayers of group VI transition metal dichalcogenides possess direct gaps in the visible spectrum with the exception of MoTe2, where its gap is suitably located in the infrared region but its stability is of particular interest, as tellurium compounds are acutely sensitive to oxygen exposure. Here, our environmental (time-dependent) measurements reveal two distinct effects on MoTe2 monolayers: For weakly luminescent monolayers, photoluminescence signal and optical contrast disappear, as if they are decomposed, but yet remain intact as evidenced by AFM and Raman measurements. In contrast, strongly luminescent monolayers retain their optical contrast for a prolonged amount of time, while their PL peak blue-shifts and PL intensity saturates to slightly lower values. Our X-ray photoelectron spectroscopy measurements and DFT calculations suggest that the presence of defects and functionalization of these defect sites with O2 molecules strongly dictate their material properties and aging response by changing the excitonic dynamics due to deep or shallow states that are created within the optical band gap. Presented results not only shed light on environmental effects on fundamental material properties and excitonic dynamics of MoTe2 monolayers but also highlight striking material transformation for metastable 2D systems such as WTe2, silicone, and phosphorene." @default.
• W2316572938 created "2016-06-24" @default.
• W2316572938 creator A5030924893 @default.
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• W2316572938 creator A5077601154 @default.
• W2316572938 date "2015-04-15" @default.
• W2316572938 modified "2023-09-23" @default.
• W2316572938 title "Environmental Changes in MoTe₂ Excitonic Dynamics by Defects-Activated Molecular Interaction" @default.
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• W2316572938 doi "https://doi.org/10.1021/acsnano.5b00985" @default.
• W2316572938 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25868985" @default.
• W2316572938 hasPublicationYear "2015" @default.
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