Hybrid plasmonic nanostructures based on controlled integration of MoS2 flakes on metallic nanoholes

Abstract

Here, we propose an easy and robust strategy for the versatile preparation of hybrid plasmonic nanopores by means of controlled deposition of single flakes of MoS2 directly on top of metallic holes. The device is realized on silicon nitride commercial membranes and can be further refined by TEM or FIB milling to achieve the passing of molecules or nanometric particles through a pore. Importantly, we show that the plasmonic enhancement provided by the nanohole is strongly accumulated in the 2D nanopore, thus representing an ideal system for single-molecule sensing and sequencing in a flow-through configuration. Here, we also demonstrate that the prepared 2D material can be decorated with metallic nanoparticles that can couple their resonance with the nanopore resonance to further enhance the electromagnetic field confinement at the nanoscale level. This method can be applied to any gold nanopore with a high level of reproducibility and parallelization; hence, it can pave the way to the next generation of solid-state nanopores with plasmonic functionalities. Moreover, the controlled/ordered integration of 2D materials on plasmonic nanostructures opens a pathway towards new investigation of the following: enhanced light emission; strong coupling from plasmonic hybrid structures; hot electron generation; and sensors in general based on 2D materials. Nanopore

References in corpus (9)

• Atomically thin MoS2: A new direct-gap semiconductor
• Anomalous Lattice Vibrations of Single and Few-Layer MoS2
• Identification of single nucleotides in MoS2 nanopores
• Strong exciton-plasmon coupling in MoS2 coupled with plasmonic lattice
• Optical identification of atomically thin dichalcogenide crystals
• Electrochemical reaction in single layer MoS2: nanopores opened atom by atom
• Valley-Polarized Exciton-Polaritons in a Monolayer Semiconductor
• Beaming of helical light from plasmonic vortices via adiabatically tapered nanotip
• A MoS2-based capacitive displacement sensor for DNA sequencing

Cited by in corpus (7)

• Advances in ultrafast plasmonics
• Coupling phenomena and collective effects in resonant meta-molecules supporting plasmonic and magnetic functionalities: a review
• Site-selective functionalization of plasmonic nanopores for enhanced fluorescence and Förster Resonance Energy Transfer
• Controlled integration of MoS2 flakes on nanopores by means of electrophoretic deposition
• Chemically-controlled self-assembly of hybrid plasmonic nanopores on graphene
• Plasmonic Photochemistry as a Tool to Prepare Metallic Nanopores with Controlled Diameter
• Electrophoretic deposition of WS2 flakes on nanoholes arrays. Role of the used suspension medium