A5050193220- 2D Materials and Applications
- Graphene research and applications
- Diamond and Carbon-based Materials Research
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Boron and Carbon Nanomaterials Research
- MXene and MAX Phase Materials
- Perovskite Materials and Applications
- Advanced Battery Technologies Research
- Transition Metal Oxide Nanomaterials
- Semiconductor materials and devices
- Thermal properties of materials
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Metal and Thin Film Mechanics
- Additive Manufacturing and 3D Printing Technologies
- Electronic and Structural Properties of Oxides
- Advanced Photocatalysis Techniques
- Supercapacitor Materials and Fabrication
- ZnO doping and properties
- Chalcogenide Semiconductor Thin Films
- Gas Sensing Nanomaterials and Sensors
- Advanced battery technologies research
- Rare-earth and actinide compounds
- High Entropy Alloys Studies
Rice University
2018-2025
Banaras Hindu University
2023
Bridge University
2023
TIFR Centre for Interdisciplinary Sciences
2017-2023
Max Planck Institute for the Structure and Dynamics of Matter
2023
Center for Free-Electron Laser Science
2023
University of Virginia
2023
United States Naval Research Laboratory
2023
DEVCOM Army Research Laboratory
2022-2023
United States Army Combat Capabilities Development Command
2022-2023
Realizing solution-processed heterostructures is a long-enduring challenge in halide perovskites because of solvent incompatibilities that disrupt the underlying layer. By leveraging dielectric constant and Gutmann donor number, we could grow phase-pure two-dimensional (2D) perovskite stacks desired composition, thickness, bandgap onto 3D without dissolving substrate. Characterization reveals 3D-2D transition region 20 nanometers mainly determined by roughness bottom Thickness dependence 2D...
Abstract Polymer dielectrics find applications in modern electronic and electrical technologies due to their low density, durability, high dielectric breakdown strength, design flexibility. However, they are not reliable at temperatures mechanical integrity thermal stability. Herein, a self‐assembled nanocomposite is reported, which integrates 1D polyaramid nanofibers 2D boron nitride nanosheets through vacuum‐assisted layer‐by‐layer infiltration process. The resulting exhibits hierarchical...
Lithium batteries that could be charged on exposure to sunlight will bring exciting new energy storage technologies. Here, we report a photorechargeable lithium battery employing nature-derived organic molecules as photoactive and electrode material. By absorbing of desired frequency, lithiated tetrakislawsone electrodes generate electron–hole pairs. The holes oxidize the while generated electrons flow from cathode Li metal anode. During electrochemical operation, observed rise in charging...
Due to the strong in-plane but weak out-of-plane bonding, it is relatively easy separate nanosheets of two-dimensional (2D) materials from their respective bulk crystals. This exfoliation 2D can yield large nanosheets, hundreds micrometers wide, that be as thin one or a few atomic layers thick. However, underlying physical mechanisms unique each technique produce wide distribution defects, yields, functionalization, lateral sizes, and thicknesses, which appropriate for specific end...
Here we study the controlled growth of ultrathin molybdenum dioxide (MoO2) flakes, a metallic analogue widely studied transition metal dichalcogenide MoS2. This demonstrates three distinct MoO2 polymorphs (monoclinic, tetragonal, and newly identified hexagonal phase) using physical vapor deposition. Comprehensive characterization through atomic force microscopy, Raman spectroscopy, X-ray photoelectron transmission electron microscopy confirms their unique structures validates observed...
Transparent, flexible, lithium ion conducting, freestanding, solid polymer electrolyte for state devices is developed based on polydimethylsiloxane, poly(ethylene oxide) and LiClO<sub>4</sub>, the salting in phenomenon resulting amorphisation of matrix established.
Abstract Since graphene, a variety of 2D materials have been fabricated in quest for tantalizing combination properties and desired physiochemical behavior. that are piezoelectric, i.e., allow facile conversion electrical energy into mechanical vice versa, offer applications sensors, actuators, harvesting, stretchable flexible electronics, storage, among others. Unfortunately, must satisfy stringent symmetry requirements to be classified as piezoelectric. Here, ultrathin single‐crystal...
There has been no experimental evidence for ferromagnetic ordering in isotropic atomically thin two-dimensional crystals, until a bilayer Cr2Ge2Te6 and three-atom thick monolayer CrI3 is shown to retain at finite temperatures. Here, we demonstrate successful isolation of non-van der Waals-type ultrathin nanosheet FeS2 derived from naturally occurring pyrite mineral (FeS2) by means liquid-phase exfoliation. Structural characterizations imply that (111)-oriented sheets are predominant...
New ways of directly using solar energy to charge electrochemical storage devices such as batteries would lead exciting developments in technologies. Here, a two-electrode photo rechargeable Li-ion battery is demonstrated nanorod type II semiconductor heterostructures with in-plane domains crystalline MoS2 and amorphous MoOx . The staggered band alignment limits the electron holes recombination causes be retained Li intercalated electrode. generated pushes Li-ions hence battery. Low gap,...
Neutron diffraction on the centrosymmetric square-net magnet ${\mathrm{EuGa}}_{2}{\mathrm{Al}}_{2}$ reveals multiple incommensurate magnetic states (AFM1, 2, 3) in zero field. In applied field, a new phase (A) is identified from magnetization and transport measurements, bounded by two of ${\ensuremath{\mu}}_{0}H=0$ phases helical, AFM3, cycloidal) with different moment orientations. Moreover, magnetotransport measurements indicate presence topological Hall effect, maximum values centered A...
Abstract To overcome the limitations of commercializing lithium‐ion batteries (LIBs), a one‐step feasible route is reported to prepare hybrid matrix molybdenum oxides (MoO 3‐x , x = 0 and 1) thin film anode. In this direction, electrical conductivity barriers MoO 3 dielectric are by reinforcing conductive 2 via chemical vapor deposition (CVD) route. The intermixed array nanograins nanoflakes grown over stainless‐steel (SS) foil delivers maximum gravimetric capacitance 281 F g −1 specific...
Metal tellurides are highly sought after for energy and spintronic applications much of which is owed to its catalytic magnetic properties. Confining it into two-dimensions improving the surface area enriches activity Herein, we demonstrate isolation ultrathin two-dimensional sheets manganese(II)telluride having an average thickness ∼2 nm flake size ∼100 by means liquid phase exfoliation presumably first time. Vanishing exchange interactions in results paramagnetic ordering while pristine...
Two-dimensional (2D) materials are known to have low-friction interfaces by reducing the energy dissipated sliding contacts. While this is often attributed van der Waals (vdW) bonding of 2D materials, nanoscale and quantum confinement effects can also act modify atomic interactions a material, producing unique interfacial properties. Here, we demonstrate behavior magnetene, non-vdW material obtained via exfoliation magnetite, showing statistically similar friction benchmark vdW materials. We...
Despite decades of research, metallic corrosion remains a long-standing challenge in many engineering applications. Specifically, designing material that can resist both abiotic as well biotic environments elusive. Here lightweight sulfur-selenium (S-Se) alloy is designed with high stiffness and ductility serve an excellent corrosion-resistant coating protection efficiency ≈99.9% for steel wide range diverse environments. S-Se coated mild shows rate 6-7 orders magnitude lower than bare metal...
We used temperature-dependent spark plasma sintering to induce phase transformations of metastable 3D c-BN mixed-phase 3D/2D c-BN/h-BN and ultimately the stable 2D h-BN at high temperature, useful for extreme-temperature technology.
The present work is an attempt to realize Li-ion cells using Li-substituted polyaniline (PANI) and its composites with LiFePO<sub>4</sub> LiMn<sub>2</sub>O<sub>4</sub> as cathodes, flexibility in the cell design retention of capacity over long cycles.
Synthetic structures built with cement benefit from high compressive strength, but their brittleness limits fracture toughness under conditions where repeated, unnegotiable strains are imparted. This could be somewhat alleviated, if complex tunable geometries is created, for example, via direct ink writing (DIW)‐based 3D printing. However, the nature of slurries used in DIW printing must modified proper rheology to effectively and programmatically printed distinct mechanical properties...
Piezoelectricity in low-dimensional materials and metal-semiconductor junctions has attracted recent attention. Herein, a 2D in-plane junction made of multilayer 2H 1T' phases molybdenum(IV) telluride (MoTe2 ) is investigated. Strong piezoelectric response observed using piezoresponse force microscopy at the 2H-1T' junction, despite that multilayers each individual phase are weakly piezoelectric. The experimental results density functional theory calculations suggest amplified due to charge...