A5074414726- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Copper-based nanomaterials and applications
- Microplastics and Plastic Pollution
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Perovskite Materials and Applications
- Nanocluster Synthesis and Applications
- ZnO doping and properties
- Spectroscopy and Chemometric Analyses
- Catalytic Processes in Materials Science
- Spectroscopy Techniques in Biomedical and Chemical Research
- Cultural Heritage Materials Analysis
- Solid-state spectroscopy and crystallography
- Silicon Nanostructures and Photoluminescence
- Advanced Photocatalysis Techniques
- Advanced Chemical Sensor Technologies
- Plant biochemistry and biosynthesis
- MXene and MAX Phase Materials
- Advanced battery technologies research
- Gold and Silver Nanoparticles Synthesis and Applications
- Anodic Oxide Films and Nanostructures
- Dendrimers and Hyperbranched Polymers
- Graphene and Nanomaterials Applications
- Conducting polymers and applications
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2019-2022
Institut de Recerca en Energia de Catalunya
2015-2020
Hamburgische Investitions- und Förderbank
2019
Universität Hamburg
2008-2016
The University of Queensland
2011
Microplastics are of major concerns for society and is currently in the focus legislators administrations. A small number measures to reduce or remove primary sources microplastics environment coming into effect. At moment, they have not yet tackled important topics such as food safety. However, recent developments 2018 bill California requesting analysis drinking water by standardized operational protocols. Administrations analytical labs facing an emerging field methods sampling,...
Cesium lead halide (CsPbX3, X = Cl, Br, I) nanocrystals (NCs) offer exceptional optical properties for several potential applications but their implementation is hindered by a low chemical and structural stability limited processability. In the present work, we developed new method to efficiently coat CsPbX3 NCs, which resulted in increased as well The based on incorporation of poly(maleic anhydride-alt-1-octadecene) (PMA) into synthesis perovskite NCs. presence PMA ligand shell stabilizes...
Transition metal phosphides have great potential to optimize a number of functionalities in several energy conversion and storage applications, particularly when nanostructured or nanoparticle form. However, the synthesis transition phosphide nanoparticles its scalability is often limited by toxicity, air sensitivity, high cost reagents used. We present here simple, scalable, cost-effective "heating up" procedure produce using inexpensive, low-toxicity, air-stable triphenyl phosphite as...
Near-field spectroscopy techniques push resolution to the nanoscale: IR-sSNOM characterises domain distributions in mixed polymers and nano-FTIR combined with appropriate library search tools correctly identifies polymer samples.
Ni<sub>2−x</sub>Co<italic>x</italic>P nanocrystals with controlled composition were produced and demonstrated to show excellent activity toward the hydrogen evolution reaction.
Halogen compounds are capable of playing an important role in the manipulation nanoparticle shapes and properties. In a new approach, we examined shape evolution CdSe nanorods to hexagonal pyramids hot-injection synthesis under influence halogenated additives form organic chlorine, bromine iodine compounds. Supported by density functional theory calculations, this is explained as result X-type ligand coordination sloped flat Cd-rich facets equilibrium strongly influenced halides. Synchrotron...
Sodium ion batteries based on SnP NCs and sodium(<sc>i</sc>) bis(fluorosulfonyl)imide electrolyte displayed high reversible capacities cycling stability.
Monodisperse Cu2ZnSnS4 (CZTS) nanocrystals (NCs), with quasi-spherical shape, were prepared by a facile, high-yield, scalable, and high-concentration heat-up procedure. The key parameters to minimize the NC size distribution efficient mixing heat transfer in reaction mixture through intensive argon bubbling improved control of heating ramp stability. Optimized synthetic conditions allowed production several grams highly monodisperse CZTS NCs per batch, up 5 wt % concentration crude solution...
Insights to the mechanism of CdSe nanoparticle attachment carbon nanotubes following hot injection method are discussed. It was observed that presence water improves nanotube coverage while Cl containing media responsible for shape transformation nanoparticles and further lattice. The experiments also show taking place involves right balance several factors, namely, low passivated surface, particles with well-defined crystallographic facets, interaction an organics-free sp2 Furthermore, this...
Visualization of small micro-(20-1 μm) and nanoplastics (<1 combined with chemical identification is still a challenge. To address this, we designed manufactured easy-to-handle silicon membrane filters standard round filter geometry 25 mm in diameter 10 filtration area, holding hexagonal sections periodically arranged pores either 250 nm or 1 μm. Due to their flat reflective surface, the serve as versatile substrate for spectroscopic particles. Optical markers at different levels...
The performance of devices based on semiconductor nanocrystals (NCs) improves both with stronger interface interactions among NCs and between solid electrode surfaces. combination X-ray photoelectron spectroscopy (XPS) 31P CP/MAS NMR (cross-polarization/magic angle spinning nuclear magnetic resonance) shows that the selective substitution long organic chains by chlorine atomic ligands during colloidal synthesis hot injection method promotes adsorption CdSe to carbon sp2 surfaces, leading...
ZnO is a promising catalyst for hydrogen and oxygen production due to the position of conduction valence bands. Nevertheless, there are some limitations efficiency its n-type character. Once in contact with electrolyte, an extraction barrier electrons formed. The purpose this work was create site by synthesizing small pyramidally shaped nanocrystals (∼10 nm), which consist predefined growth gold particle at tip. Photoelectrochemical deposition on performed yield hybrid structure....
Thin films prepared of semiconductor nanoparticles are promising for low-cost electronic applications such as transistors and solar cells. One hurdle their breakthrough is notoriously low conductivity. To address this, we precisely decorate CdSe with platinum domains one to three nanometers in diameter by a facile robust seeded growth method. We demonstrate the transition from metal dominated conduction monolayered films. By adjusting content solution-processable hybrid, oligomeric dark...
We report the growth of an unstable shell-like gold structure around dihexagonal pyramidal CdSe nanocrystals in organic solution and structural transformation to spherical domains by two means: i) electron beam irradiation (in situ) (ii) addition a strong reducing agent during synthesis. By varying conditions deposition, such as ligands present or geometry nanocrystals, we were able tune domain size between 1.4 nm 3.9 gain important information on role surface chemistry hetero nanoparticle...
<italic>In situ</italic> generated chloride ions passivate CdSe nanocrystals.
There is a strong interest to attach nanoparticles non-covalently one-dimensional systems like boron nitride nanotubes form composites. The combination of those materials might be used for catalysis, in solar cells, or water splitting. Additionally, the fundamental aspect charge transfer between components can studied such systems. We report on synthesis and characterization nanocomposites based semiconductor attached directly nanotubes. Boron were simply integrated into colloidal...
The assembly of colloidal nanocrystals (NCs) is a unique strategy to produce porous materials with high crystallinity and unmatched control over structural chemical parameters. This has been demonstrated mostly for single-component nanomaterials. In the present work, we report gelation NC solutions driven by electrostatic interaction oppositely charged NCs. A key step leading this success stable solution positively component. We achieved goal functionalizing NCs inexpensive nontoxic amino...
The most prevalent image of the morphology Au–CdSe hybrid nanoparticles (HNPs) is that dumbbells or matchsticks with CdSe (NPs) acting as seed material onto which spherical Au dots are deposited. On basis a system only three reaction components, seeds, n-dodecyltrimethylammonium bromide-complexed AuCl3, and dodecanethiol, we demonstrate how deposits on semiconductor NPs, either in form vertices shell around NP surface, can be determined by controlling oxidation state metal precursor....
A facile colloidal synthesis of highly ionic cesium halide nanocrystals is reported. Colloidal CsI, CsCl and CsBr with unprecedentedly small dimensions are obtained using oleylammonium halides oleate as precursors. The ease adaptability our method enables its universalization for the formation other nanocrystals.