A5089568992- Diamond and Carbon-based Materials Research
- Graphene research and applications
- Perovskite Materials and Applications
- Electrocatalysts for Energy Conversion
- Quantum Dots Synthesis And Properties
- 2D Materials and Applications
- Conducting polymers and applications
- Topological Materials and Phenomena
- Advanced Sensor and Energy Harvesting Materials
- Fullerene Chemistry and Applications
- Boron and Carbon Nanomaterials Research
- Magnetic confinement fusion research
- Fusion materials and technologies
- Advanced battery technologies research
- Metal and Thin Film Mechanics
- Ferroelectric and Piezoelectric Materials
- Nanomaterials for catalytic reactions
- Nuclear Physics and Applications
- Iron-based superconductors research
- Chalcogenide Semiconductor Thin Films
- Copper-based nanomaterials and applications
- Nanowire Synthesis and Applications
- Organic Light-Emitting Diodes Research
- Innovative Energy Harvesting Technologies
- Calcium Carbonate Crystallization and Inhibition
Rutgers, The State University of New Jersey
2021-2024
Rutgers Sexual and Reproductive Health and Rights
2023
Princeton University
2013-2019
Princeton Public Schools
2016-2019
Princeton Plasma Physics Laboratory
2016-2018
Abstract Electromechanical effects are ubiquitous in biological and materials systems. Understanding the fundamentals of these coupling phenomena is critical to devising next‐generation electromechanical transducers. Piezoelectricity has been studied detail, both bulk at mesoscopic scales. Recently, an increasing amount attention paid flexoelectricity: electrical polarization induced by a strain gradient. While piezoelectricity requires crystalline structures with no inversion symmetry,...
Extremely low energy consumption neuromorphic computing is required to achieve massively parallel information processing on par with the human brain. To this goal, resistive memories based materials ionic transport and extremely operating current are required. allows for power operation by minimizing program, erase, read currents. However, currently used in memories, such as defective HfOx, AlOx, TaOx, etc., cannot suppress electronic (i.e., leakage current) while allowing good transport....
Piezoelectric nanocomposites represent a unique class of materials that synergize the advantageous features polymers and piezoelectric nanostructures have attracted extensive attention for applications energy harvesting self-powered sensing recently. Currently, most were synthesized using with relatively low constants, resulting in lower output currents voltages. Here, we report synthesis (1 - x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) nanowire-based nanocomposite significantly improved...
Cobalt oxyhydroxide nanowires show excellent oxygen evolution activity, which is further enhanced by nickel incorporation. Effects of and manganese incorporation on the catalytic activities are explained in term surface species stabilities.
The development of methods for achieving precise spatiotemporal control over chemical and biomolecular gradients could enable significant advances in areas such as synthetic tissue engineering, biotic–abiotic interfaces, bionanotechnology. Living organisms guide through highly orchestrated biomolecules that direct cell growth, migration, differentiation. While numerous have been developed to manipulate implement gradients, integrating into multiplexed, three-dimensional (3D) matrices remains...
Hybrid organic-inorganic halide perovskite semiconductors are attractive candidates for optoelectronic applications, such as photovoltaics, light-emitting diodes, and lasers. Perovskite nanocrystals of particular interest, where electrons holes can be confined spatially, promoting radiative recombination. However, nanocrystalline films based on traditional colloidal nanocrystal synthesis strategies suffer from the use long insulating ligands, low concentration, significant aggregation during...
Members of the Mo${}_{x}$W${}_{1-x}$Te${}_{2}$ series are predicted to be Weyl semimetals, hosting type-II fermions, which have yet experimentally realized and unusual because they strongly violate Lorentz invariance. Crucially, points in this system sit above Fermi level. Here, authors show that for a cone, although not type-I if point is level, then it's necessary see band structure level observe topological arc. The also discover pump-probe angle-resolved photoemission beautifully...
Organic-inorganic hybrid perovskite materials are emerging as semiconductors with potential application in optoelectronic devices. In particular, perovskites very promising for light-emitting devices (LEDs) due to their high color purity, low nonradiative recombination rates, and tunable bandgap. Here, using pure CH3 NH3 PbI3 LEDs an external quantum efficiency (EQE) of 5.9% a platform, it is shown that electrical stress can influence device performance significantly, increasing the EQE from...
Abstract Perovskite light‐emitting diodes (LEDs) require small grain sizes to spatially confine charge carriers for efficient radiative recombination. As size decreases, passivation of surface defects becomes increasingly important. Additionally, polycrystalline perovskite films are highly brittle and mechanically fragile, limiting their practical applications in flexible electronics. In this work, the introduction properly chosen bulky organo‐ammonium halide additives is shown be able...
Liquid-phase chemical exfoliation can achieve industry-scale production of two-dimensional (2D) materials for a wide range applications. However, many 2D with potential applications in quantum technologies often fail to leave the laboratory setting because their air sensitivity and depreciation physical performance after processing. We report simple method create stable, aqueous, surfactant-free, superconducting ink containing phase-pure 1T'-WS2 monolayers that are isostructural...
H2 production by direct photoelectrochemical (PEC) water splitting has remained unachievable commercially, mainly due to rapid failure at the interface between photoabsorber(s) and catalyst(s). PEC devices made from multijunction III–V semiconductors with platinum group metal (PGM) catalysts have yielded impressive initial solar-to-H2 (STH) efficiency >19%, which rapidly corrodes in aqueous electrolytes. Here, TiO2/TiN layers were fused create a bifunctional GaInP2/GaAs tandem photoabsorber...
Abstract Development of earth-abundant electrocatalysts for hydrogen evolution and oxidation reactions in strong acids represents a great challenge developing high efficiency, durable, cost effective electrolyzers fuel cells. We report herein that hafnium oxyhydroxide with incorporated nitrogen by treatment using an atmospheric plasma demonstrates catalytic activity stability both acidic media materials. The observed properties are especially important unitized regenerative cells polymer...
Abstract Boron nitride nanotubes (BNNTs) were successfully synthesized by a dc arc discharge using boron-rich anode as synthesis feedstock in nitrogen gas environment at near atmospheric pressure. The was achieved independent of the cathode material suggesting that under such conditions operates so-called anodic mode with being consumed evaporation due to heating. To sustain current thermionic electron emission, has be sufficiently high temperature, which for typical density ~100 A/cm 2 , is...
A new catalyst is based on cerium-modified copper oxide demonstrated the promoting effect of tetravalent Ce toward oxygen evolution activity.
A facile one-pot Stöber route is used to synthesize high-quality Ag, AgBr–silica–resorcinol formaldehyde polymer core–shell–shell nanospheres. The obtained templates can be converted Ag@carbon yolk–shell nanostructures with tunable dimensions.
We report a new HxCrS2-based crystalline/amorphous layered material synthesized by soft chemical methods. study the structural nature and composition of this with atomic resolution scanning transmission electron microscopy (STEM), revealing complex structure consisting alternating layers amorphous crystalline lamellae. Furthermore, magnetic properties show evidence for increased frustration compared to parent compound NaCrS2. Finally, we that can be exfoliated, thus providing facile...
Piezoelectric nanowires are an important class of smart materials for next-generation applications including energy harvesting, robotic actuation, and bioMEMS. Lead zirconate titanate (PZT), in particular, has attracted significant attention, owing to its superior electromechanical conversion performance. Yet, the ability synthesize crystalline PZT with well-controlled properties remains a challenge. Applications common nanosynthesis methods hampered by issues such as slow kinetics, lack...
We report a scalable and continuous preparation route for metal nanoparticles (Au or Pt)@nanosphere polymer composites through flash nanoprecipitation (FNP). Uniform metal@nanosphere with 2–3 nm colloids decorating the surface on nanosphere are obtained tunable overall particle size nanoparticle arrangement. The show high catalytic ability stability in reduction of p-nitrophenol.
Abstract Self-powered nanodevices scavenging mechanical energy require piezoelectric nanostructures with high coefficients. Here we report the fabrication of a single-crystal (1 − x)Pb(Mg 1/3 Nb 2/3 )O 3 xPbTiO (PMN-PT) nanobelt superior constant (d 33 = ~550 pm/V), which is approximately ~150%, 430% and 2100% largest reported values for previous PMN-PT, PZT ZnO nanostructures, respectively. The d single-crystalline PMN-PT results from precise orientation control during its fabrication. As...
Endohedral metallofullerenes (EMFs) are excellent carriers of rare-earth element (REE) ions in biomedical applications because they preclude the release toxic metal ions. However, existing approaches to synthesize water-soluble EMF derivatives yield mixtures that inhibit precise drug design. Here we report synthesis metallobuckytrio (MBT), a three-buckyball system, as modular platform develop structurally defined with ligands by choice. Demonstrated PEG ligands, resulting MBTs show superb...
Volumetric methods of nanoparticle synthesis (such as arc discharges, flames, and laser ablation) yield a plethora particle types, but in general we lack deep understanding the physical processes behind such synthesis. This is due part to diagnostic tools. The authors demonstrate four-wave-mixing technique, termed coherent Rayleigh-Brillouin scattering, for $i\phantom{\rule{0}{0ex}}n$ $s\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}u$ detection ~5 nm particles...
Arc-plasma synthesis and <italic>ab initio</italic> simulations find a growth mechanism of boron nitride nanotubes.
Weyl semimetals have sparked intense research interest, but experimental work has been limited to the TaAs family of compounds. Recently, a number theoretical works predicted that compounds in Mo$_x$W$_{1-x}$Te$_2$ series are semimetals. Such proposals particularly exciting because quasi two-dimensional crystal structure well-suited many transport experiments, while WTe$_2$ and MoTe$_2$ already subject numerous for device applications. However, with available ARPES techniques it is...