A5108062411- Quantum Dots Synthesis And Properties
- Molecular Spectroscopy and Structure
- Surfactants and Colloidal Systems
- Copper-based nanomaterials and applications
- Spectroscopy and Laser Applications
- Chalcogenide Semiconductor Thin Films
- Distributed and Parallel Computing Systems
- Experimental Learning in Engineering
- Diatoms and Algae Research
- Paleontology and Stratigraphy of Fossils
- Quantum and electron transport phenomena
- Microwave-Assisted Synthesis and Applications
- Molecular Junctions and Nanostructures
- Synthesis of Organic Compounds
- Pickering emulsions and particle stabilization
- Atmospheric Ozone and Climate
- Photonic Crystals and Applications
- nanoparticles nucleation surface interactions
- Ferroelectric and Negative Capacitance Devices
- History and Theory of Mathematics
- Organic and Inorganic Chemical Reactions
- Semiconductor materials and devices
- Carbon Nanotubes in Composites
- Quantum-Dot Cellular Automata
- Advanced Neuroimaging Techniques and Applications
Friedrich-Alexander-Universität Erlangen-Nürnberg
2023
Incheon National University
2023
Forschungszentrum Jülich
2021-2022
Saha Institute of Nuclear Physics
1993-2021
University of Tübingen
2018-2019
Indian Statistical Institute
2015
We report the formation of conductive mesocrystalline superstructures cubic PbS nanocrystals (NCs) through directional cross-linking with organic semiconductors at liquid/air interface monitored simultaneously by in situ grazing incidence small angle X-ray scattering and diffraction. determine superlattice type, its symmetry parameters, atomic orientation NCs from time-resolved patterns. The contraction follows an exponential decay during ligand exchange, preserving always two-dimensional...
We report on the effect of ligand exchange Cu2SeyS1–y and Cu2Se nanocrystals (NCs) with organic π-system cobalt β-tetraaminophthalocyanine (CoTAPc) analyze changes in structural, optical, electric properties thin films these hybrid materials. A strong interaction surface NCs is revealed by UV/vis absorption Raman spectroscopy. Grazing-incidence small-angle X-ray scattering studies show a significant contraction interparticle distance upon exchange. For copper-deficient Cu2–xSe, this has...
Abstract The structural connectivity of the brain has been addressed by various imaging techniques such as diffusion weighted magnetic resonance (DWMRI) or specific microscopic approaches based on histological staining label-free using polarized light (e.g., three-dimensional Polarized Light Imaging (3D-PLI), Optical Coherence Tomography (OCT)). These methods are sensitive to different properties fiber enwrapping myelin sheaths i.e. distribution basic protein (histology), apparent...
The enduring demand for ever-increasing storage capacities inspires the development of new few nanometer-sized, high-performance memory devices. In this work, tri-n-octylphosphine oxide (TOPO)-stabilized sub-10 nm monoclinic HfO2 nanocrystals (NC) with a rod-like and spherical shape are synthesized used to build up microscale nanoscale test electrical characterization these devices studied by cyclic current–voltage measurements reveals redox-like behavior in ambient atmosphere volatile...
The framework of 1,3,4-oxadiazine is crucial for numerous bioactive molecules, but only a limited number synthetic methods have been reported its production. In 2015, Wang's group developed 4-(dimethylamino)pyridine (DMAP)-catalyzed [2 + 4] cycloaddition allenoates with N-acyldiazenes, which provided an atom-efficient route 1,3,4-oxadiazines. However, the practicality this method was by instability N-acyldiazenes as starting materials. Building upon our ongoing research about aerobic...
Limonene from citrus peel waste is applied as a renewable expander molecule for the synthesis of large-mesopore templated silica. Comparative life cycle assessment with conventional TMB demonstrates lower environmental impact.
We study the structural coherence of a self-assembled overlayer PbS nanocrystal (NC) superlattice onto an underlying NC monolayer, which acts as template. explore effect templating layer on structure asemblies by varying interfacial strain and determine impact new ligands their structure. The overlayers templates are analyzed grazing-incidence X-ray scattering microscopy. find that differences in lattice parameters 7.7% between two layers tolerated terms "soft epitaxial" assembly into...
An optical switch with two distinct resonances is formed by combining PbS nanocrystals and the conductive polymer poly[sodium 2-(2-ethynyl-4-methoxyphenoxy)acetate] (PAE) into a hybrid thin film. Infrared excitation of invokes charge transfer consecutive polaron formation in PAE, which activates for excited-state absorption at visible frequencies. The modulation photocurrent response exhibits highly wavelength-selective ON/OFF ratios. Transient spectroscopy shows that correlated excited...
We study temperature-dependent charge transport in two-dimensional assemblies of copper sulfide nanodiscs the covellite crystal phase (Cu1.1S). To enhance interparticle coupling, we cross-link nanocrystals with organic π-system Cu-4,4′,4″,4‴-tetraaminophthalocyanine and observe an increase conductivity by 6 orders magnitude. The electrical properties monolayers this hybrid ensemble are consistent a semiconductor exhibit two abrupt changes at discrete temperatures (120 210 K), which may be...
Abstract An optical switch with two distinct resonances is formed by combining PbS nanocrystals and the conductive polymer poly[sodium 2‐(2‐ethynyl‐4‐methoxyphenoxy)acetate] (PAE) into a hybrid thin film. Infrared excitation of invokes charge transfer consecutive polaron formation in PAE, which activates for excited‐state absorption at visible frequencies. The modulation photocurrent response exhibits highly wavelength‐selective ON/OFF ratios. Transient spectroscopy shows that correlated...
This article provides an overview of noncoding RNAs ( ncRNA ) involving their structure, function, computational methods for structure prediction and the algorithms analyzing ncRNAs from metagenome samples. Different techniques such as dynamic programming DP ), genetic algorithm GA artificial neural network ANN stochastic context‐free grammar SCFG are discussed. The basic concepts metagenomics along with biological basis mentioned relevance in is also explored. Similarity composition based...
In this work, we put forward, for the first time, interplay between correlated disorder and hopping dimerization on bias driven circular current in a loop conductor that is clamped two electrodes. The introduced site energies of ring form Aubry-Andr\'e-Harper (AAH) model. Simulating quantum system within tight-binding framework all results are worked out based standard wave-guide theory. Unlike transport current, commonly referred to drain can get enhanced with increasing strength. This...
We report on the in situ monitoring of formation conductive superlattices Cu1.1S nanodiscs via cross-linking with semiconducting cobalt 4,4',4'',4'''-tetraaminophthalocyanine (CoTAPc) molecules at liquid/air interface by real-time grazing incidence small angle X-ray scattering (GISAXS). determine structure, symmetry and lattice parameters superlattices, formed during solvent evaporation ligand exchange self-assembled nanodiscs. self-assemble into a two-dimensional hexagonal superlattice...
Starting from the basic ideas of mathematica, we give a detailed description about way linking external programs with mathematica through proper mathlink commands. This article may be quite helpful for beginners to start and write in mathematica. In first part, illustrate how use mathemtica notebook complete program notebook. Following this, also mention elaborately utility local global variables those are very essential writing All commands needed doing different mathematical operations can...
Self-assembly of anisotropic nanomaterials into ordered multidimensional (2D and 3D) arrays facilitate versatile collective properties. Monitoring this self-assembly processes is essential to control the emerging properties these nanostructured materials. We report here results in situ X-ray reflectivity (XRR) grazing incidence small-angle scattering (GISAXS) studies carried out at air–liquid interface understand process ZnS nanorods (NRs) real-time. Our study shows that high surface...
Abstract Development of dual inhibitors pan‐RAF/VEGFR2 is important for the treatment K‐Ras mutated colorectal cancer, which one most common and lethal malignancies. Building upon our studies in pan‐RAF/VEGFR2, we designed synthesized new inhibitor candidates by installing a urea or guanidine moiety to previously reported order enhance both metabolic stability solubility. Various 1‐(5‐((3‐(9 H ‐purin‐6‐yl)pyridin‐2‐yl)amino)‐2‐fluorophenyl)‐3‐phenylurea...