A5033350228- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Nanowire Synthesis and Applications
- Perovskite Materials and Applications
- 2D Materials and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Graphene research and applications
- Luminescence and Fluorescent Materials
- Luminescence Properties of Advanced Materials
- Phase-change materials and chalcogenides
- Surface and Thin Film Phenomena
- Nanomaterials for catalytic reactions
- Semiconductor materials and devices
- Quantum optics and atomic interactions
- Plasmonic and Surface Plasmon Research
- Nonlinear Optical Materials Studies
- Copper-based nanomaterials and applications
- Advancements in Semiconductor Devices and Circuit Design
- Thin-Film Transistor Technologies
- Silicon Nanostructures and Photoluminescence
- Molecular Junctions and Nanostructures
- Nonlinear Optical Materials Research
- Ferroelectric and Negative Capacitance Devices
- Near-Field Optical Microscopy
Nova Measuring Instruments (Israel)
2021-2024
Weizmann Institute of Science
2014-2019
Melodea (Israel)
2014
Ben-Gurion University of the Negev
2012
We studied the chemical, optical and catalytic properties of metal (Pt, Pd, Ag, Au)–Cu2O core–shell nanoparticles grown via a simple reproducible approach which utilizes aqueous-phase reactions at room temperature. were able to control thickness Cu2O shell examine effect core's shape size on structure hybrid nanocrystals. also nanocrystals, in particular frequency plasmon gold nanorods. In addition, activity nanostructures was examined by testing reduction reaction 4-nitrophenol with NaBH4....
Pairs of coupled quantum dots with controlled coupling between the two potential wells serve as an extremely rich system, exhibiting a plethora optical phenomena that do not exist in each isolated constituent dots. Over past decade, systems have been under extensive study context epitaxially grown (QDs), but only handful examples reported colloidal QDs. This is mostly due to difficulties controllably growing nanoparticles encapsulate within them separated by energetic barrier via synthesis...
Nonlinear optical processes can be dramatically enhanced via the use of localized surface plasmon modes in metal nanoparticles. Here we show how more elaborate structures, based on shape-controlled Au/Cu2O core/shell nanostructures, enable further enhancement nanoparticle third-harmonic scattering cross-section. The semiconducting component takes a twofold role this structure, both providing knob to tune resonant frequency gold and by virtue its excitonic states. advantages deficiencies...
Abstract Solution‐processed core/multishell semiconductor quantum dots (QDs) could be tailored to facilitate the carrier separation, promotion, and recombination mechanisms necessary implement photon upconversion. In contrast other upconversion schemes, upconverting QDs combine stability of an inorganic crystalline structure with spectral tunability afforded by confinement. Nevertheless, their yield (UCQY) is fairly low. Here, design rules are uncovered that enable significantly enhance...
We investigated the effect of cation exchange on anionic framework lightly doped CdSe:Te/CdS nanorods. In contrast with previously studied core/shell systems, Te dopant, located in center CdSe core, provides an extremely sensitive indicator for any structural changes that may occur as a result process. first optimized procedure order to retain fluorescence properties nanorods after Cd2+ Cu+ and back Cd2+. Next, using multiexciton spectroscopy, we were able probe magnitude exciton–exciton...
We optimized the performance of quantum confined Stark effect QCSE based voltage nanosensors. A high throughput approach for single particle characterization was developed and utilized to screen a library such Type II ZnSe CdS seeded nanorods were found have best among different nanosensors evaluated in this work. The degree correlation between intensity changes spectral excitons emission under applied field characterized. An upper limit temporal response individual modulation characterized...
Abstract Logic devices based on two-dimensional (2D) channel materials require highly crystalline monolayers. Despite various laboratory-scale metrology techniques being intensively used to characterize 2D small coupons, the development of in-line and routine characterization material monolayers grown 300 mm wafers remains in its early stages. In this work, we evaluate combine different metrologies thickness morphology tungsten disulfide (WS 2 ) at wafer level. By combining complementary...
Matching the reactivities of S and Se, homogenously alloyed ultrathin sheets CdS<sub>x</sub>Se<sub>1−x</sub> were obtained. The 5–6 monolayer thick nanosheets showed promising optical properties (e.g. quantum yield) relative to binary compounds.
In-line Raman spectroscopy for compositional and strain metrology throughout front-end-of-line (FEOL) manufacturing of next-generation gate-all-around nanosheet field-effect transistors is presented. Thin alternating layers fully strained pseudomorphic Si(1 − x)Gex Si were grown epitaxially on a substrate subsequently patterned. Intentional variations introduced by changing the Ge content (x = 0.25, 0.35, 0.50). Polarization-dependent in-line was employed to characterize quantify evolution...
Nanomaterials that possess the ability to upconvert two low-energy photons into a single high-energy photon are of great potential be useful in variety applications. Recent attempts realize upconversion (UC) semiconducting quantum dot (QD) systems focused mainly on fabrication heterostructured colloidal double QDs, or by using QDs as sensitizers for triplet-triplet annihilation organic molecules. Here we propose simplified approach, which coupled thiol ligands and UC is achieved via...
Devices based on 2D material channels require high-quality monolayer material. However, although the value of many laboratory metrology techniques has been demonstrated small coupons, development inline characterization layers grown full 300mm wafers is still missing. In this work, we evaluate and combine different metrologies to characterize at wafer level thickness morphology tungsten disulfide (WS<sub>2</sub>) wafers. Combining results from allows us reveal WS<sub>2</sub> as well their...
Optical gain from colloidal quantum dots has been desired for several decades since their discovery. While multiexcitations is by now well-established, nonradiative Auger recombination limits the lifetime of such population inversion in dots. CdSe cores isovalently doped one to few Te atoms capped with rod-shaped CdS are examined as a candidate system enhanced stimulated emission properties. Emission depletion spectroscopy shows behavior characteristic 3-level systems these This implies...
In-line Raman spectroscopy for compositional and strain metrology throughout front-end-of-line manufacturing of next generation stacked gate-all-around nanosheet field-effect transistors is presented. Thin alternating layers fully strained pseudomorphic Si<sub>(1-x)</sub>Ge<sub>x</sub> Si were grown epitaxially on a substrate subsequently patterned. Intentional variations introduced by changing the Ge content (x = 0.25, 0,35, 0.50). Polarization-dependent in-line was employed to characterize...