A5023586845- Graphene research and applications
- Quantum and electron transport phenomena
- Advanced Memory and Neural Computing
- Boron and Carbon Nanomaterials Research
- 2D Materials and Applications
- Advancements in Battery Materials
- Machine Learning in Materials Science
- Surface and Thin Film Phenomena
- Electrochemical Analysis and Applications
- Ferroelectric and Piezoelectric Materials
- Molecular Junctions and Nanostructures
- Diamond and Carbon-based Materials Research
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties of Alloys
- Acoustic Wave Resonator Technologies
- Graphene and Nanomaterials Applications
- Multiferroics and related materials
- Ion-surface interactions and analysis
- Physics of Superconductivity and Magnetism
- Electromagnetic Fields and Biological Effects
- Perovskite Materials and Applications
- Aerogels and thermal insulation
- Magnetic and Electromagnetic Effects
- Mechanical and Optical Resonators
- Surface Modification and Superhydrophobicity
Wilfrid Laurier University
2021-2022
Universidade Federal Fluminense
2013-2020
Brigham Young University
2020
Deformations in graphene systems are central elements the novel field of {\it straintronics}. Various strain geometries have been proposed to produce specific properties but their experimental realization has limited. Because strained folds can be engineered on samples appropriate substrates, we study effects transport properties. We show existence an enhanced local density states (LDOS) along direction fold that originates from localization higher energy states, and provides extra...
Previous works on deformed graphene predict the existence of valley-polarized states, however, optimal conditions for their detection remain challenging. We show that in quantum Hall regime, edge-like states strained regions can be isolated energy within Landau gaps. identify precise new conducting edges-like to valley polarized, with flexibility positioning them at chosen locations system. A map local density as a function and position reveals unique braid pattern serves fingerprint polarization.
We analyze the electronic properties of a hybrid graphene-BN nanoribbon system, using Hubbard model Hamiltonian within mean field approximation. Due to different electronegativities boron and nitrogen atoms, an electric is induced across zigzag graphene strip, breaking spin degeneracy band structure. Optimal tight-binding parameters are found from first-principles calculations. Edge potentials proposed as corrections for on-site energies, modeling BN-graphene interfaces. show that...
Here we discuss the possibility of modulating energy gaps graphene nanoribbon bilayers, with zigzag edges, by applying electric fields. The system is disposed in Bernal configuration and described a Hubbard Hamiltonian. We follow Hartree-Fock mean-field theory to calculate electronic properties system. Under action transversal field, half-metallicity found: One spin bands increases gap as intensity field increased whereas other decreases until achieving null gap. For particular range,...
Shape memory materials have been playing an important role in a wide range of bioengineering applications. At the same time, recent developments graphene-based nanostructures, such as nanoribbons, demonstrated that, due to unique properties graphene, they can manifest superior electronic, thermal, mechanical, and optical characteristics ideally suited for their potential usage next generation diagnostic devices, drug delivery systems, other biomedical One most intriguing parts these new lies...
Strained fold-like deformations on armchair graphene nanoribbons (AGNRs) can be properly engineered in experimental setups, and could lead to a controlling tool for gaps transport properties. Here, we analyze the electronic properties of folded AGNRs relating responses mechanical deformation. An important universal parameter gap engineering is ribbon percent-width variation, i.e., difference between deformed undeformed widths. band tuned mechanically well-defined bounded range energy values,...
To realize high specific capacity Li-metal batteries, a protection layer for the anode is needed. We are carrying out combinatorial screening of Li-alloy thin films as which can undergo significant lithiation with minimum change in volume and crystal structure. Here, we have fabricated lithium-free binary alloy film composition spreads Co 1-xSnx on Cu layers Si substrates. The crystallinity was tuned by varying deposition temperature followed electrochemical to form ternary films....
Abstract Since its isolation by Geim and coworkers, graphene has received a lot of attention from the research community as well industry. Interesting groundbreaking been published on showing excellent properties wide range applications. It was thought that could replace well-established applications currently being controlled graphite. In this perspective, we review large-scale graphite think can replace. We also discuss niche make inroads for
In this contribution, we study the properties of new promising graphenebased materials with shape memory effects. While traditional alloys have been extensively studied, it is a challenge to preserve at nanoscale. As result, explored, among which graphene oxide (GO) crystals ordered epoxy groups where recoverable strain 14.5% has already reported. We use such nanoscale GO structures as benchmark example for our studies here. MBTR and SOAP representations are employed in general-purpose ML...
We present the electrostatic control of photoluminescence monolayer MoS$_2$ at room temperature via integration free-standing BaTiO$_3$ (BTO), a ferroelectric perovskite oxide, layers. show that use BTO leads to highly tunable exciton emission in minimal range gate voltages, effectively controlling neutral excitons charged (trions) conversion. Due BTO's polarization-induced doping we observe large peak shifts as well and A trion binding energy 40-100 meV. To further investigate efficacy...