Figure | Working principle of the quantum-emitting sites from thiol-induced localized excitons in MoS2. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure | Working principle of the quantum-emitting sites from thiol-induced localized excitons in MoS2.

Caption

Figure | Working principle of the quantum-emitting sites from thiol-induced localized excitons in MoS2.  a, DNA origami-programmable thiol-MoS2 hybrid assembly. Top panel: Schematic illustration of a DNA origami triangle positioned on a hydrophilic, hydroxyl group covered binding site (green) on a hydrophobic, methyl group covered surface of Si/SiO2 chip and a thiol–origami-MoS2 assembly. Middle panel: The various steps of the fabrication process of a thiol–origami-MoS2 assembly. Bottom panel: AFM images of DNA origami triangles and optical microscope images of MoS2 flake before and after transferring onto an origami pattern. b, DNA origami-programmable single-photon emission in MoS2–thiol molecule hybrids, involving low-temperature (4 K) PL spectrum, Correlation function, and time-resolved PL. c, Schematic of exciton localization in thiol-functionalized MoS₂, showing the total density of states with donor-type defect states 80 meV below the conduction band that trap excitons for single-photon emission, while the PL intensity ratio of localized to free excitons rises with DNA triangle density.

Credit

Shen Zhao et al.

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