In-situ formation and evolution of atomic defects in monolayer WSe 2 under electron irradiation

Transition metal dichalcogenide (TMD) monolayers such as MoS 2 , MoSe 2 , MoTe 2 , WS 2 and WSe 2 have attracted significant interest due to their remarkable electronic and optical properties, exhibiting a direct band gap, enabling usability in electronics and optics. Their properties can be altered further by the introduction of lattice...

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Extreme field confinement in zigzag plasmonic crystals

We propose extreme field confinement in a zigzag plasmonic crystal that can produce a wide plasmonic bandgap near the visible frequency range. By applying a periodic zigzag structure to a metal–insulator–metal plasmonic waveguide, the lowest three plasmonic crystal bands are flattened, creating a high-quality broadband plasmonic mirror over...

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Wafer-scale graphene-ferroelectric HfO 2 /Ge–HfO 2 /HfO 2 transistors acting as three-terminal memristors

In this paper we report a set of experiments at the wafer level regarding field-effect transistors with a graphene monolayer channel transferred on the ferroelectric HfO 2 /Ge–HfO 2 /HfO 2 three-layer structure. This kind of transistor has a switching ratio of 10 3 between on and off states due to the bandgap in graphene induced by the ferroelectric...

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Investigating control of convective heat transfer and flow resistance of Fe 3 O 4 /deionized water nanofluid in magnetic field in laminar flow

This paper studies the convective heat transfer and flow resistance of Fe 3 O 4 /deionized water nanofluids in laminar flow under the control of an external magnetic field. The basic thermophysical parameters including viscosity, specific heat capacity and thermal conductivity are investigated to describe the fundamental performance of heat...

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Investigation of magnetically driven passage of magnetic nanoparticles through eye tissues for magnetic drug targeting

This paper elucidates the feasibility of magnetic drug targeting to the eye by using magnetic nanoparticles (MNPs) to which pharmaceutical drugs can be linked. Numerical simulations revealed that a magnetic field gradient of 20 T m −1 seems to be promising for dragging magnetic multicore nanoparticles of about 50 nm into the eye. Thus, a...

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Bayesian reasoning machine on a magneto-tunneling junction network

The recent trend in adapting ultra-energy-efficient (but error-prone) nanomagnetic devices to non-Boolean computing and information processing (e.g. stochastic/probabilistic computing, neuromorphic, belief networks, etc) has resulted in rapid strides in new computing modalities. Of particular interest are Bayesian networks (BN) which may...

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Fast, wafer-scale growth of a nanometer-thick graphite film on Ni foil and its structural analysis

The growth of graphite on polycrystalline Ni by chemical vapor deposition (CVD) and the microstructural relation of the graphitic films and the metallic substrate continues to puzzle the scientific community. Here, we report the wafer-scale growth of a nanometer-thick graphite film (∼100 nm, NGF) on Ni foil via a fast-thermal CVD approach...

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Structural and magnetic properties of ultra-low density BiFeO 3 nanoparticles produced by pulsed laser deposition

Ultra-low-density BiFeO 3 nanoparticles have been prepared by pulsed laser deposition and their structure and magnetic properties have been studied. Annealing increases crystallinity and the size of the particles leading to an alteration of magnetic properties, observed from magnetic studies and evaluated using high-resolution transmission...

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Effect of pore-size disorder on the electronic properties of semiconducting graphene nanomeshes

Graphene nanomeshes (GNMs) are novel materials that recently raised a lot of interest. They are fabricated by forming a lattice of pores in graphene. Depending on the pore size and pore lattice constant, GNMs can be either semimetallic or semiconducting with a gap large enough (∼ 0.5 eV) to be considered for transistor applications. The...

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Selective area oxidation of copper derived from chemical vapor deposited graphene microstructure

The barrier properties of graphene coating are highly correlated with its microstructure which is then determined by the chemical vapor deposition (CVD) growth history on metals. We demonstrate here an unrevealed selective area oxidation of copper under graphene, which is derived from the implicit-etching-controlled CVD growth mode of graphene....

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