A5039753744- Quantum Dots Synthesis And Properties
- Nanocluster Synthesis and Applications
- nanoparticles nucleation surface interactions
- Molecular Junctions and Nanostructures
- Copper-based nanomaterials and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Catalytic Processes in Materials Science
- Surface and Thin Film Phenomena
- Chalcogenide Semiconductor Thin Films
- Advanced Electron Microscopy Techniques and Applications
- Curcumin's Biomedical Applications
- Bone Tissue Engineering Materials
- Advanced Nanomaterials in Catalysis
- Nanowire Synthesis and Applications
- Neuroscience and Neural Engineering
- Graphene research and applications
- Nanomaterials for catalytic reactions
- Microfluidic and Capillary Electrophoresis Applications
- Advanced biosensing and bioanalysis techniques
- Quantum and electron transport phenomena
- Microbial Fuel Cells and Bioremediation
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Nanoparticle-Based Drug Delivery
- Electron and X-Ray Spectroscopy Techniques
University of Antwerp
2013-2025
University of Rochester Medical Center
2023
University of Rochester
2023
Institute of Life Sciences
2012-2019
IMEC
2019
BioElectronics (United States)
2016
FZI Research Center for Information Technology
2016
Forschungszentrum Jülich
2016
Jülich Aachen Research Alliance
2016
Indian Institute of Science Bangalore
2008-2013
We demonstrate an ultrafast method for the formation of graphene supported Pt catalysts by co-reduction oxide and salt using ethylene glycol under microwave irradiation conditions. Detailed analysis mechanism hybrids indicates a synergistic whereby presence ions leads to faster reduction GO defect sites on reduced serves as anchor points heterogeneous nucleation Pt. The resulting hybrid consists ultrafine nanoparticles uniformly distributed susbtrate. have shown that exhibits good catalytic...
Semiconductor based nanoscale heterostructures are promising candidates for photocatalytic and photovoltaic applications with the sensitization of a wide bandgap semiconductor narrow material being most viable strategy to maximize utilization solar spectrum. Here, we present simple wet chemical route obtain ZnO/CdS without using any molecular linker. Our method involves nucleation Cd-precursor on ZnO nanorods subsequent sulfidation step leading formation heterostructures. Excellent control...
Triphenylphosphonium cations strongly enhance the PL quantum yield of near infrared photoluminescent gold nanoclusters by metal-to-ligand charge transfer.
Parkinson's disease (PD) is the most widespread form of dementia where there an age related degeneration dopaminergic neurons in substantia nigra region brain. Accumulation α-synuclein (αS) protein aggregate, mitochondrial dysfunction, oxidative stress, and neuronal cell death are pathological hallmarks PD. In this context, amalgamation curcumin piperine having profound cognitive properties, antioxidant activity seems beneficial. However, blood–brain barrier (BBB) major impediment for...
The control of shapes nanocrystals is crucial for using them as building blocks various applications. In this paper, we present a critical overview the issues involved in shape-controlled synthesis nanostructures. particular, focus on mechanisms by which anisotropic structures high-symmetry materials (fcc crystals, instance) could be realized. Such require symmetry-breaking mechanism to operative that typically leads selection one facets/directions growth over all other symmetry-equivalent...
Abstract Filamentous cable bacteria display long-range electron transport, generating electrical currents over centimeter distances through a highly ordered network of fibers embedded in their cell envelope. The conductivity these periplasmic wires is exceptionally high for biological material, but chemical structure and underlying transport mechanism remain unresolved. Here, we combine high-resolution microscopy, spectroscopy, imaging on individual bacterium filaments to demonstrate that...
We report a reversible phase transformation of platelet-shaped ZnS nanostructures between wurtzite (WZ) and zinc blende (ZB) phases by insertion/ejection dopant Mn(II) ions induced thermocyclic process. In reaction flask loaded with WZ platelets Mn molecular precursors, during heating are incorporated change the host to ZB; cooling spontaneously ejected, returning nanoplatelets original phase. These changes monitored for several cycles PL, EPR, XRD, HRTEM. Interestingly, (0001) transform...
Microwave-based methods are widely employed to synthesize metal nanoparticles on various substrates. However, the detailed mechanism of formation such hybrids has not been addressed. In this paper, we describe thermodynamic and kinetic aspects reduction salts by ethylene glycol under microwave heating conditions. On basis analysis, identify temperatures above which salt is thermodynamically favorable rates homogeneous nucleation heterogeneous supports favored. We delineate different...
Graphene exhibits exceptional properties, including high tensile strength, mechanical stiffness, and electron mobility. Chemical functionalization of graphene with boron nitrogen is a powerful strategy for tuning these properties specific applications. Molecular self-assembly provides an efficient pathway the tailored synthesis doped graphene, depending on molecular precursor used. This study presents scalable approach to synthesizing large-area boron- nitrogen-doped using two borazine...
The ability to predict the morphology of crystals formed by chemical reactions is fundamental importance for shape-controlled synthesis nanostructures. Based on atomistic mechanism crystal growth under different driving forces, we have developed diagrams regimes two-dimensional crystals. By using controlled in absence surfactants/capping agents, demonstrate validity this approach formation 2D structures Au, Ag, Pt and Pd.
Symmetry plays a key role in dictating the equilibrium morphology of crystals. However, several growth morphologies that deviate from point group symmetry are routinely observed under different conditions. In this article, we present summary symmetry-breaking mechanisms operative for crystals grown vapour phase as well those formed result wet chemical synthesis. This understanding is crucial rationalizing variety during nanocrystal synthesis and also provides rational framework anisotropic...
Electrical transport measurements on ultrathin single-crystalline Au nanowires, synthesized via a wet chemical route, show an unexpected insulating behavior. The linear response electrical resistance exhibits power-law dependence temperature. In addition, the variation of current over wide range temperature and voltage obeys universal scaling relation that provides compelling evidence for non-Fermi liquid Our results demonstrate quantum ground state in nanowires simple metallic systems can...
The electronic state in ultrathin gold nanowires is tuned by careful engineering of the device architecture via a chemical methodology. electrons are localized to an insulating (showing variable range hopping transport) simply bringing them close substrate, while insertion interlayer leads Tomonaga Luttinger liquid state.
We present a green method for the synthesis of ZnO–Au hybrids using an ultrafast microwave-based technique. This provides good control over nucleation metal nanoparticles on oxide support, which governs morphology and microstructure hybrids. The exhibit catalytic activity CO oxidation compared to similar reported in literature. Detailed XPS investigation reveals presence Au–Zn Au–O bonds at interface. surface doping leads formation anionic cationic Au sites that contribute enhanced activity....
Theoretical studies exist to compute the atomic arrangement in gold nanowires and influence on their electronic behavior with decreasing diameter. Experimental studies, e.g., by transmission electron microscopy, chemically synthesized ultrafine wires are however lacking owing unavailability of suitable protocols for sample preparation stability under beam irradiation. In this work, we present an scale structural investigation quantum single crystalline 2 nm diameter, prepared a carbon film...
Creating nanoscale heterostructures with molecular-scale (<2 nm) metal wires is critical for many applications and remains a challenge. Here, we report the first time synthesis of single-crystal Au nanowires attached to different nanostructure substrates. Our method involves formation nanoparticle seeds by reduction rocksalt AuCl nanocubes heterogeneously nucleated on substrates subsequent nanowire growth oriented attachment nanoparticles from solution phase. Nanoscale fabricated such...
It is well known that metals with higher electron affinity like Au tend to undergo reduction rather than cation-exchange. experimentally shown under certain conditions cation-exchange dominant over reduction. Thermodynamic calculation further consolidates the understanding and paves way for better predictability of cation-exchange/reduction reactions other systems. As a service our authors readers, this journal provides supporting information supplied by authors. Such materials are peer...
We demonstrate a simple strategy of obtaining clean, ultrathin single crystal Au nanowires on substrates and interconnecting pre-defined contacts with an insight into the growth mechanism. The pristine nature enables electron transport measurement through such wires opens up possibilities exploring its properties for wide range applications.
The 3D spatial resolution, the material contrast and evolution of noise are analyzed in reconstructed volume a combined scanning transmission electron microscopy (HAADF-STEM) energy dispersive x-ray spectroscopy (EDS) tomography experiment. Standard simultaneous iterative reconstruction technique HAADF-EDS bimodal tomographic considered for +/−90° series pillar shaped sample embedding full nanowire device. With high number iterations, resolution both HAADF EDS down to 5 nanometer can be...
We report the first-time experimental realization of rocksalt AuCl crystals. Our approach involves Au(III) complexing and reduction to Au(I) using an amine-terminated surfactant in a low dielectric permittivity solvent. The charge screening nonpolar solvents promotes crystallization AuCl, which bonding is predominantly ionic, preference over tetragonal AuCl. crystals obtained here will facilitate studies unveil nexus between electronic structure crystal polymorphs, provide insights on these...
Development of new multifunctional nanostructures relies on the ability to make materials at nanoscale with control over size, shape and composition. While this is extremely important tune several properties, an alternative strategy create active interfaces between two or more form heterostructures. In these heterostructures, play a key role in stabilizing enhancing efficiency individual components for various applications. article, we discuss synthesis methods different types...