527 search results for “metallic nanoparticles” in the Public website
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Protein-polyelectrolyte interactions: Monitoring particle formation and growth by nanoparticle tracking analysis and flow imaging microscopy
The purpose of this study was to investigate the formation and growth kinetics of complexes between proteins and oppositely charged polyelectrolytes.
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Exploring the mechanism of targeted nanoparticle-mediated drug delivery using the zebrafish model
Exploring the mechanism of targeted nanoparticle-mediated drug delivery using the zebrafish model
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Redox Interconversion between Metal Thiolate and Disulfide Compounds
In the last decade, the redox interconversion between metal thiolate and disulfide compounds has been extensively investigated for copper, but not for other transition metal ions.
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Towards a Sustainable and Circular Metals Economy
In-use stocks of products can be considered as intermediaries between human needs and the physical world.
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Phase separation in lipid-based nanoparticles: exploring the nano-bio interface
This doctoral thesis is an effort to understand how lipid phase-separation induced by diacylglycerol analogues in lipid-based nanoparticles affects their in vivo behavior, leading to specific nanoparticle-protein communications and selective cell targeting.
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Our technology: Cathodic Corrosion Method (CCM)
Cathodic corrosion for producing nanoparticles was (re)discovered when trying to control the electrochemical etching of a scanning tunneling microscopy (STM) tip.
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Electrocatalytic reduction of CO2 and nitrate on immobilized metal porphyrins
M.T.M. Koper, Co-promotor: D.G.H. Hetterscheid
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Peptide Amphiphile Nanoparticles Enhance the Immune Response Against a CpG-Adjuvanted Influenza Antigen
Cationic peptide amphiphile nanoparticles are employed for co-delivery of immune modulator CpG and antigen. This results in better targeting to the antigen presenting cells and eliciting strong Th1 response, which is effective against the intracellular pathogens.
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Intracellular Delivery of Lipid Bilayer Coated Mesoporous Silica Nanoparticles
Alexander Kros and co-workers describe how mesoporous silica nanoparticles (MSNs) are delivered into cells via membrane fusion thereby omitting endocytosis pathways. Fusion is induced by a pair of complementary coiled-coil lipopeptides inserted into the membrane of cells and in the bilayer of lipid-coated…
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Modelling the interactions of advanced micro- and nanoparticles with novel entities
Novel entities may pose risks to humans and the environment. The small particle size and relatively large surface area of micro- and nanoparticles (MNPs) make them capable of adsorbing other novel entities, leading to the formation of aggregated contamination.
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charge transport properties and functionality of molecule-nanoparticle ensembles
Promotor: J.M. van Ruitenbeek, Co-Promotor: S.J. van der Molen
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Metals in the diffuse gas around high-redshift galaxies
Promotores: Prof.dr. J. Schaye & Prof.dr. C. Steidel (California Institute of Technology)
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highly accurate density functionals for H2 dissociation on transition metals
Metals surfaces form a group of effective catalysts for the reaction of small molecules such as hydrogen (H2).
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Nanoparticle-based combination drug delivery systems for effective cancer treatment
PhD defence
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tuberculosis vaccine based on microneedles loaded with antigen-containing nanoparticles
Tuberculosis (TB) is a major global health problem caused by the bacterium Mycobacterium tuberculosis (Mtb). In 2015, there were estimated to be 10.4 million new cases and 1.8 million deaths ascribed to TB, making it one of the top 10 causes of death worldwide. Unfortunately, the only current registered…
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Self-assembly properties and applications of metal-binding peptides and proteins
It is estimated that approximately 30% of all proteins require a metal to function. Investigating the relationship between metal-binding and peptide/protein folding allows us to uncover fundamental rules for creating metallo-peptides and proteins, which in turn leads to the creation of new structures,…
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Cathodic corrosion
Cathodic corrosion is a relatively unknown phenomenon that can severely etch metallic electrodes at cathodic (negative) potentials.
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Spin transport and superconductivity in half-metallic nanowires and junctions
The interest of this thesis lies in spin transport in normal metals and superconducting half-metallic junctions.
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Accurate modeling of the dynamics of dissociative chemisorption on metal surfaces
Fundamental understanding of molecular reactions on metal surfaces is important for improving heterogeneous catalysis.
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Transition metal compounds with S/N-functionalized NHC ligands: structures, redox properties and electrocatalytic activity
The research described in this thesis focused on the preparation of S/N functionalized carbene ligands and their transition metal complexes, and the exploration of their application as electrocatalysts for proton reduction.
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initio molecular dynamics calculations on reactions of molecules with metal surfaces
Promotor: Prof.dr. G.J. Kroes
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The power of biotic ligand models : site-specific impact of metals on aquatic communities
Promotor: Prof.dr. G.R. de Snoo, Co-promotores: Dr. ing. M.G. Vijver, J.P.M. Vink
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Investigating the impact of nanoparticles on the environment
On Tuesday 4 September, Martina Vijver delivered the scientific lecture during the academic opening of the Faculty of Science. Martina is professor in Ecotoxicology at CML and would like to have collaborations with colleagues from the Leiden Centre of Data Science. We had a brief interview with her.
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Special nanoparticles for cancer therapy! Will you help?
Developing a better treatment for patients with head and neck cancer, that is what Binanox, The 2022 iGEM Leiden team, want to achieve. They hope to raise at least 10,000 euros for this cause. Support their crowdfunding campaign today.
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microneedle arrays and Mycobacterium tuberculosis antigen-containing nanoparticles
Mycobacterium tuberculosis (Mtb), the pathogen causing tuberculosis (TB), is the leader among all pathogens responsible for the most human deaths today and it is considered as one of the top 10 causes of death worldwide. There is an increasing occurrence of multidrug-resistant and even totally drug-resistant…
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‘Quality Nano’ funded research for evaluation of the toxicity of nanoparticles
'Quality Nano' funded research of the Institute of Environmental Sciences to work in Exeter University for 20 working days, which allows the institute to access highly advanced equipment needed for evaluation the toxicity of nanoparticles.
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Nanomaterial safety for microbially-colonized hosts: Microbiota-mediated physisorption interactions and particle-specific toxicity
The external tissues of plants and animals are colonized by microbial communities termed microbiota. When organisms are exposed to environmental pollutants, these substances will therefore encounter microbiota at the exposure interface.
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Quantum dynamics of H2 on metal surfaces: researching the role of surface atoms
This research focuses on the (Quantum) Dynamics (QD) of the reactive scattering of H2 from metal surfaces.
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Life after the Grand Jamboree: Wrapping-up iGEM
‘A challenging rollercoaster, but also a very bonding and insightful experience,’ that’s how the team of iGEM Leiden 2022 wraps up their participation in the iGEM contest. The contest for synthetic biology climaxed during the Grand Jamboree in Paris. The team ended up in the top 10 of over 360 teams…
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Large-scale European project identifies risks of nanoparticles
The large-scale project NanoInformatics will assess the risks associated with nanoparticles. The project will be funded by the EU with 6.8 million euros and was launched at the beginning of this year. Three scientists from Leiden are involved. 'For the first time, this project combines the various experts…
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Plastic nanoparticles make larval zebrafish hyperactive
Nanoplastics influence the behaviour of larval zebrafish, says new research by the Institute of Biology Leiden (IBL) and the Institute of Environmental Sciences (CML). The researchers observed that a certain type of nanoparticles leads to stress reactions in the sugar balance, resulting in hyperactivity…
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Light and nanoparticles against cancer
Leiden PhD student Xuequan Zhou has designed a new promising molecule that efficiently kills cancer cells, but does not harm healthy tissue. The trick: the drug is only active when irradiated with light. Zhou’s new compound does this extra efficiently by cleverly self-organising into nanoparticles.…
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Two-photon luminescence of gold nanorods: applications to single-particle tracking and spectroscopy
Gold nanorods are biocompatible nanoparticles that present an excellent two-photon signal that can be used to get high spatial resolution inside living cells. Gold nanorods are photostable and therefore can be followed inside cells for long time, with possible applications as trackers in live cells.
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Martina Vijver on nanoparticles at Paradiso's Science & Cocktails
Professor of Ecotoxicology Martina Vijver of the Institute of Environmental Sciences has given a public talk at Paradiso Amsterdam for Science & Cocktails on 4 March 2019. Her presentation was called: 'The added value & added risk of size: nanomaterials'.
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Design and synthesis of metal-based chemotherapeutic agents for targeted DNA interactions or DNA repair pathway modulation
The research presented in this thesis explores the chemotherapeutic potential of metal-based compounds as chemotherapy agents, with an initial focus on the synthesis and DNA interaction studies of platinum and palladium compounds utilizing the [Pt(bapbpy)]2+ scaffold. The study identifies intercalation…
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Improving safety assessment of nanoparticles
How safe are the nanoparticles in transparent sunscreen, anti-odour socks and bacteria-resistant plasters? Although microbes are present on all organisms, the tools that estimate the safety of nanomaterials still hardly take them into account. Bregje Brinkmann explored the role of these microbes during…
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Metal constraints for a low-carbon economy?
This was the question Leiden researchers from the Institute of Environmental Sciences CML posed in an article published last week in the journal Resources, Conservation, Recycling
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Buddhist and Hindu Metal Images of Indonesia: Evidence for shared artistic and religious networks across Asia (c.6th-10th century)
Mathilde Mechling defended her thesis on 28 january 2020.
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Leiden physicists detect single nanoparticles in motion
It's pretty hard to spot a single 5 nanometer particle. Leiden physicists pulled it off by turning a 120 nm gold rod into a detector.
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Nanoparticles can aid in stroke therapy
Tiny selenium particles could have a therapeutic effect on ischemic brain strokes by promoting the recovery of brain damage. Pharmacologists, including Alireza Mashaghi from the Leiden Academic Centre for Drug Research discovered that selenium nanoparticles inhibit molecular mechanisms that are responsible…
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Martina Vijver
Science
vijver@cml.leidenuniv.nl | +31 71 527 1487
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The effect of nanoparticles on our planet
‘Solar panels, toothpaste and sport socks. What do these things have in common?’ Martina Vijver, professor of ecotoxicology begins her TEDx-talk. Watch her online lecture if you want to learn more about the effects of nano-particles on our environment and health.
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Nanoparticles: a wonder material with a downside?
Minute nanoparticles are bringing about a completely new industrial revolution. But little is known about the possible dangers to the food chain. An international group will be examining this issue, and Leiden researchers will be playing a key role.
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Catalysis and Surface Chemistry
In the Catalysis and Surface Chemistry group, we investigate how catalysis works on the molecular level. The group is divided in six subgroups, focusing on different aspects of heterogeneous catalysis, homogeneous catalysis and electrocatalysis.
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Observing what cannot be observed: computational electrochemistry from carbon to hydrogen
In this thesis, we consider various (electro)chemical phenomena at surfaces and nanoparticles and their underlying atomistic processes, which we studied using first-principles methods such as density functional theory.
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Tiny, pain-free vaccinations: microneedles and nanoparticles
If it’s up to PhD student Guangsheng Du, patients don’t need to worry about big needles anymore. At the Leiden Academic Center for Drug Research (LACDR), he studied the use of microneedles and nanoparticles as a new vaccination system. ‘I want to create a more patient-friendly delivery method.’ He defends…
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Learn about the Circular Economy of Metals
On 22 January 2018, the Massive Open Online Course ’A Circular Economy of Metals: Towards a Sustainable Societal Metabolism’ kicks off. This course is developed and taught by associate professor Ester van der Voet.
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to electric vehicles puts heavy pressure on production of critical metals
The current production of a number of critical metals is insufficient for the large-scale transition to electric vehicles. This is the conclusion of a report by environmental scientist Benjamin Sprecher and organisations Copper8 and Metabolic. As a solution, they advocate more electric car-sharing,…
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Green miner: new plant species mines metal
A plant that takes metal from the ground all by itself: a natural way to mine or to clean the soil. PhD student Roderick Bouman (Hortus Botanicus Leiden) described a new plant species from Sabah, Borneo, which can be used to extract nickel. In an open access article in Botanical studies, he and the…
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Going accurate for molecule – metal surface interactions
Researchers from the THEOR CHEM group at Leiden University strive to set new benchmarks in the accuracy of the prediction of interaction energies between molecules and metal surfaces.