Tunable Mixed-Dimensional 0D-2D Heterostructures: A DNA Nanotechnology Strategy

Le résumé fourni par la source

Mixed-dimensional heterostructurescan allow bypassing individual nanomaterials intrinsic limitations towards the development of novel hybrids for different technological applications. Critical to this end is the ability to control the interface of the single components , from their spatial separation to the chemical nature of the interface, toward the optimization of their synergistic coupling and optoelectronic properties. In this study, we will present a strategy for the controlled assembly and optoelectronic tunability of zero dimensional (0D)-two-dimensional (2D) heterostructures, using DNA as a linking and template moiety. In particular, we assembled metal sulfide nanoparticles (NPs) on MoS2 nanoflakes , with nanoscale control over their separation and ability to present multiple kind of NPs on the same DNA template linker. (see figure). The aqueous solution-processable approach we devised permits the modulation of charge carrier doping and trion formation in the transition metal dichalcogenide (TMD), in a non-destructive manner. Moreover, our strategy allowed us construct NPs-TMD field-effect tansistors with tailored photoinduced electrical response to different wavelengths , and high detectivity . Figure 1

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