A5064834802- 2D Materials and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Topological Materials and Phenomena
- Graphene research and applications
- Orbital Angular Momentum in Optics
- Quantum Dots Synthesis And Properties
- Molecular Junctions and Nanostructures
- Perovskite Materials and Applications
- Advanced Thermoelectric Materials and Devices
- Advanced biosensing and bioanalysis techniques
- Chalcogenide Semiconductor Thin Films
- Nanocluster Synthesis and Applications
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- Ga2O3 and related materials
- Molecular spectroscopy and chirality
- SARS-CoV-2 detection and testing
- Biosensors and Analytical Detection
- Strong Light-Matter Interactions
- Organoselenium and organotellurium chemistry
- Icing and De-icing Technologies
- Nonlinear Optical Materials Research
- Force Microscopy Techniques and Applications
Ohio University
2016-2025
University of Electronic Science and Technology of China
2020-2024
Universidad Católica del Norte
2012-2014
Plasmonic nanocrystals and their assemblies are excellent tools to create functional systems, including systems with strong chiral optical responses. Here we study the possibility of growing plasmonic from strictly nonchiral seeds different types by using circularly polarized light as chirality-inducing mechanism. We present a novel theoretical methodology that simulates realistic nonlinear inhomogeneous photogrowth processes in nanocrystals, mediated excitation hot carriers can drive...
This Perspective concerns the latest developments in field of chiral nanocrystals (NCs) and metastructures, focusing primarily on plasmonic nanostructures. Such nanomaterials exhibit unusually strong near-field electromagnetic responses that enable efficient biosensing light manipulation. Herein we share our thoughts trends mark what call a paradigm shift for vast dynamic chiroptical materials. The topics to be considered include polarization-sensitive photocatalysis with NCs, bioconjugates,...
Materials science has traditionally relied on a combination of experimental techniques and theoretical modeling to discover develop new materials with desired properties. However, these processes can be time‐consuming, resource‐intensive, often limited by the complexity material systems. The advent artificial intelligence (AI), particularly machine learning, revolutionized offering powerful tools accelerate discovery, design, characterization novel materials. AI not only enhances predictive...
Abstract Can chiral light induce shapes in nanocrystals a diluted solution? So far, it has been unclear whether could be and, if such, under which conditions may occur. By using realistic models of plasmonic nanocrystals, this work shows that the imprinting 3D chirality on solution by circularly polarized (CPL) is possible. Such 3D‐chiral patterns originate from electromagnetic retardation effect. This investigates formation spatial distributions near fields and hot electrons produced CPL...
Nanoparticles (NPs) can be conjugated with diverse biomolecules and employed in biosensing to detect target analytes biological samples. This proven concept was primarily used during the COVID-19 pandemic gold-NP-based lateral flow assays (LFAs). Considering gold price its worldwide depletion, here we show that novel plasmonic NPs based on inexpensive metals, titanium nitride (TiN) copper covered a shell (Cu@Au), perform comparable or even better than nanoparticles. After conjugation, these...
The growth and exfoliation of two-dimensional (2D) materials have led to the creation edges novel interfacial states at juncture between crystals with different composition or phases. These hybrid heterostructures (HSs) can be built as vertical van der Waals stacks, resulting in a 2D interface, stitched adjacent monolayer crystals, one-dimensional (1D) interfaces. Although most attention has been focused on HSs, increasing theoretical experimental interest 1D interfaces is evident. In-plane...
We explore proximity-induced ferromagnetism on transition metal dichalcogenides (TMDs), focusing molybdenum ditelluride ribbons with zigzag edges, deposited ferromagnetic europium oxide (EuO). A tight-binding model incorporates exchange and Rashba fields induced by proximity to EuO or similar substrates. For in-gap Fermi levels, electronic modes in the nanoribbon are localized along acting as one-dimensional (1D) conducting channels tunable spin-polarized currents. TMDs magnetic substrates...
We consider the thermoelectric properties of a double-quantum-dot molecule coupled in parallel to metal electrodes with magnetic flux threading ring. By means Sommerfeld expansion we obtain analytical expressions for electric and thermal conductances, thermopower figure merit arbitrary values flux. neglect electronic correlations. The Fano antiresonances transmission demand that terms usually discarded are taken into account. also explore behavior Lorenz ratio L=\kappa/\sigma T, where...
We study features of the thermoelectric transport through a Kitaev chain hosting Majorana bound states (MBS) at its ends. describe behavior Seebeck coefficient and ZT figure merit for two different configurations between MBS normal current leads. find an important violation Wiedemann-Franz law in one these geometries, leading to sizeable values efficiency over narrow window chemical potential away from neutrality. These findings could lead interesting thermoelectric-based MBSs detection...
We study in-plane lateral heterostructures of commensurate transition-metal dichalcogenides, such as ${\mathrm{MoS}}_{2}\text{\ensuremath{-}}{\mathrm{WS}}_{2}$ and ${\mathrm{MoSe}}_{2}\text{\ensuremath{-}}{\mathrm{WSe}}_{2}$, find interfacial edge states that are highly localized to these regions the heterostructure. These one-dimensional (1D) in nature, lying within band gap bulk structure exhibiting complex orbital spin structure. describe heteroribbons with a three-orbital tight-binding...
The Fano and Rabi models represent remarkably common effects in optics. Here we study the coherent time dynamics of plasmonic systems exhibiting resonances. We demonstrate that these show fundamentally different dynamics. A system with a resonance displays at most one temporal beat under pulsed excitation, whereas regime may have any number beats. Remarkably, Fano-like very characteristic tails despite strong decoherence is intrinsic for such systems. predicted can be observed nanocrystal...
Chiral plasmonic nanostructures exhibit anomalously strong chiroptical signals and offer the possibility to realize asymmetric photophysical photochemical processes controlled by circularly polarized light. Here, we use a chiral DNA-assembled nanorod pair as model system for photomelting. We show that both enantiomeric excess consequent circular dichroism can be with The nonlinear response of our results from photothermal effect leading selective melting DNA linker strands. Our study...
Chiral plasmonics has garnered profound potential in light manipulation, polarization-sensitive photochemistry and chiral sensing due to the dissymmetry factors (g-factors) exceeding significantly ones of molecules. We have investigated polarization-dependent plasmonic chemistry on gold nanocubes (AuNC) through surface-enhanced Raman scattering (SERS). The AuNC exhibit substantial optical activity a pronounced localized surface plasmon resonance. hot electron induced dehalogenation...
Core–shell gold–silver cuboidal nanoparticles were produced, with either concave or straight facets. Their incubation a low concentration of chiral l-glutathione (GSH) biomolecules was found to produce near UV plasmonic extinction and induced circular dichroism (CD) peaks. The effect is sensitive the silver shell thickness. GSH molecules cause redistribution in shell, removing atoms from edges/corners re-depositing them at nanocuboid facets, probably through some redox complexation processes...
Strong coupling typically occurs between two separate objects or an object and its environment (such as atom a cavity). However, it can also occur different excitations within the same object, situation that has been much less studied. In this study, we observe strong localized surface plasmon resonances interband transition in aluminum nanorods, evidenced by optical spectroscopy electron energy loss spectroscopy, corroborated with numerical simulations. is observed multiple orders of mode,...
In this work, we study the conductance and thermoelectric properties of a quantum dot embedded between two metallic leads with side-coupled triple molecule under magnetic field. We focus on spin polarization quantities. Our results show possibility designing an efficient spin-filter device in addition to noticeable enhancement Seebeck coefficient driven by asymmetry energy levels, tunable pure spin-Seebeck effect is obtained. This behavior also holds interacting case, where can be obtained...
Chirality, either of light or matter, has proved to be very practical in biosensing and nanophotonics. However, the fundamental understanding its temporal dynamics still needs discovered. A realistic setup for this are so-called metastructures, since they optically active built massively, hence rendering an immediate potential candidate. Here, we propose study electromagnetic-optical mechanism leading chiral optical imprinting on metastructures. Induced photothermal responses create...
Energetic and optical properties of plasmonic nanocrystals strongly depend on their sizes, shapes, composition. Whereas the use nanoparticles in biotesting has become routine, applications plasmonics energy are still early development. Here, we investigate hot-electron (HE) generation related electromagnetic effects both mono- bimetallic nanorods (NRs) focus a promising type nanocrystal–core–shell Au–Ag nanorods. The spectra NRs broadband, highly tunable with geometry, exhibit few plasmon...
We study the Ruderman-Kittel-Kasuya-Yosida interaction between magnetic impurities embedded in $p$-doped transition metal dichalcogenide triangular flakes. The role of underlying symmetries is exposed by analyzing as a function impurity separation along zigzag and armchair trajectories, specific parts sample. large spin-orbit coupling these materials produces strongly anisotropic interactions, including Dzyaloshinskii-Moriya component that can be sizable tunable. consider hybridized to...
We study the Ruderman-Kittel-Kasuya-Yosida effective exchange interaction between magnetic impurities embedded on edges of transition metal dichalcogenide flakes, using a three-orbital tight-binding model. Electronic states lying midgap bulk structure have strong one-dimensional (1D) character, localized crystallite. This results in interactions with $1/r$ (or slower) decay distance $r$, similar to other 1D systems. Most interestingly, however, spin-orbit these materials sizable noncollinear...
Inexpensive strategies for efficient decontamination of hazardous chemicals are required. In this study, the effect visible light (λ > 400 nm) on decomposition 2-chloroethyl ethyl sulfide (2-CEES, a sulfur mustard (HD) simulant) Au/TiO2 photocatalyst under anaerobic and aerobic conditions has been investigated in situ by diffuse reflectance infrared Fourier –transformed spectroscopy (DRIFTS). Under conditions, 2-CEES partially desorbs from surface likely due to photothermal effect,...