Femtosecond spectroscopy on MoS2 flakes from liquid exfoliation: surfactant independent exciton dynamics (CROSBI ID 223189)
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Podaci o odgovornosti
Vella, Danielle ; Vega-Mayoral, Victor ; Gadermaier, Christoph ; Vujičić, Nataša ; Borzda, Tetiana ; Topolovšek, Peter ; Prijatelj, Matej ; Tempra, Iacopo ; Pogna, Eva A.A. ; Cerullo, Giulio
engleski
Femtosecond spectroscopy on MoS2 flakes from liquid exfoliation: surfactant independent exciton dynamics
Ionic surfactants, which are widely used to stabilize nanomaterials in dispersions, can drastically alter the nanomaterial’s photophysical properties. Here, we use femtosecond optical spectroscopy to study the dynamics of excitons and charges in few-layer flakes of the twodimensional semiconductor MoS2. We compare samples obtained via exfoliation in water with different amounts of adsorbed sodium cholate, obtained by repeated washing of the dried flakes. We find that the femtosecond dynamics is remarkably stable against the surfactant adsorption, with a slight increase of the initial exciton quenching occurring during the first few picoseconds as the only appreciable effect.
femtosecond spectroscopy; 2D materials; molybdenum disulfide; MoS2; exciton dynamics
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