A5060490808- 2D Materials and Applications
- MXene and MAX Phase Materials
- Conducting polymers and applications
- Perovskite Materials and Applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- Magnetic Properties and Synthesis of Ferrites
- Magnetic Field Sensors Techniques
- Semiconductor materials and interfaces
- Advanced biosensing and bioanalysis techniques
- Chalcogenide Semiconductor Thin Films
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Photonic and Optical Devices
- Nonlinear Optical Materials Research
- Gyrotron and Vacuum Electronics Research
- Quantum Dots Synthesis And Properties
- Multiferroics and related materials
- Analytical Chemistry and Sensors
- Liquid Crystal Research Advancements
- Photonic Crystals and Applications
- Quantum and electron transport phenomena
Charles University
2023-2025
Indian Institute of Science Bangalore
2013-2015
We report here the investigations on size dependent variation of magnetic properties nickel ferrite nanoparticles. Nickel nanoparticles different sizes (14 to 22 nm) were prepared by sol-gel route at annealing temperatures. They are characterized TGA-DTA, XRD, SEM, TEM and Raman spectroscopy techniques for confirmation temperature phase formation, thermal stability, crystallinity, morphology structural status The magnetization studies revealed that saturation (Ms), retentivity (Mr) increase,...
In the realm of materials science and nanotechnology, pursuit scalable preparation high-quality monolayers two-dimensional (2D) is a significant challenge. Despite widespread interest sparked by unique quantum mechanical effects in these materials, achieving controlled syntheses remains hindered lack suitable techniques. This work presents facile exfoliation approach that successfully yields bulk-crystal-sized 2D monolayers, approaching 100% under ultrahigh vacuum (UHV) conditions. The...
Isotope-engineered MoS 2 bilayers, composed of 34 S and 32 provided access to the top bottom layer individually. Raman PL studies highlight suppressed intralayer excitons nuanced exciton dynamics due isotopic modification.
Monolayers of semiconducting transition metal dichalcogenides (TMDCs) are known for their unique excitonic photoluminescence (PL), which can be tuned by interfacing them with other materials. However, integrating TMDCs into van der Waals heterostructures often results in a significant quenching the PL because an increased rate nonradiative recombination processes. We demonstrate wide-range tuning intensity monolayer MoS2 interfaced another layered semiconductor, CrSBr. discover that thin...
Abstract The optoelectronic properties of two-dimensional (2D) atomically thin transition metal dichalcogenides (TMDCs) are predominantly governed by excitons and their interaction with lattice various physical fields. Therefore, it is essential to understand the role played in light–matter processes. We introduce sulfur isotope engineering for first time TMDC family, which enables us disentangle crucial phonons TMDCs. With gradual introduction heavier isotopes chemical vapor deposition...
Polypyrrole (PPy) has been synthesized electrochemically on platinum substrate by varying synthesis temperature and dopant concentration. The charge transport in PPy investigated as a function of for both in-plane out-of-plane geometry wide range 5 K–300 K. showed strong anisotropy various mechanisms were used to explain the transport. conductivity ratio, σr = σ(300 K)/σ(5 K) is calculated each sample quantify relative disorder. At all temperatures, values are found be more at lower...
The Lampert triangle model can be an interesting method for investigating the conduction mechanism in semiconducting polymers. A complete is observed PF6− doped poly(3,4-ethylenedioxythiophene) [PEDOT:PF6] devices, fabricated a stainless steel/PEDOT/Ag structure and synthesized by electro-polymerization at three different doping levels (high-S1, medium-S2, low-S3). temperature-dependent current–voltage characteristics show distinct regimes limited within triangular region called triangle:...
Electric field activated nonlinear transport is investigated in polypyrrole thin film both in-plane and out-of-plane geometries down to 5 K strong anisotropy observed. A morphological model suggested explain the through inter-chain intra-chain transport. The deviation from variable range hopping at low temperature accounted by fluctuation assisted From Zabrodaskii plots, it found that electric can tune insulating metallic regime. Glazman–Matveev used describe conduction. Field scaling...
Hybrid layered materials assembled from atomically thin crystals and small molecules bring great promises in pushing the current information quantum technologies beyond frontiers. We demonstrate here a class of valley-spin hybrid (VSH) composed monolayer two-dimensional (2D) semiconductor double-decker single molecule magnets (SMMs). have materialized VSH prototype by thermal evaporation terbium bis-phthalocyanine onto MoS2 revealed its composition stability both microscopic spectroscopic...
The physicochemical properties of van der Waals (vdW) heterostructures are driven by the delicate interactions between individual layers in a multilayer stack. While addressing monolayers different compositions is feasible, exploring intrinsic same composition within extremely challenging. This becomes utmost importance energy conversion and storage concepts based on layered vdW materials. For example, charge distribution can be determined, behavior disentangled. We introduce sulfur isotope...