253 search results for “gold” in the Public website
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Gold Matters
Gold Matters: Sustainability Transformations in Artisanal and Small-scale Gold Mining: A Multi-Actor and Trans-Regional Perspective.This project explores whether a transformative approach towards sustainability can arise in Artisanal and Smallscale Gold Mining (ASGM).
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Margaret Gold
Science
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Elucidating the catalytic properties of gold
How does CO adsorption on gold promote its own oxidation and the oxidation of other organic molecules?
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Gold in Ghana
Research on the process of artisanal and small-scale mining (ASM) in West-Africa
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Gold nanorod photoluminescence: applications to imaging and temperature sensing
Promotor: M.A.G.J. Orrit
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Single gold nanorods in live cells
Visualization of biomolecules in living cells by tagging with gold nanoparticles.
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Photosynthetic light reactions at the gold interface
Promotor: Prof.dr. T.J. Aartsma, Co-promotor: R.N. Frese
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Gold nanoparticle-peptide conjugates for biomedical applications
Despite the fact that gold nanoparticles (GNPs) are one of the most studied nanoparticles, there is still a necessity for new approaches allowing for effective protective coating to enable wider use of GNPs in biomedical applications.
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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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Burkina Faso: Global Gold Expansion and Local Terrains
The book Global Gold Production Touching Ground: Expansion, Informalization, and Technological Innovation is edited by Boris Verbrugge and Sara Geenen. In recent decades, gold mining has moved into increasingly remote corners of the globe. Aside from the expansion of industrial gold mining, many countries…
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Photothermal studies of single molecules and gold nanoparticles: vapor nanobubbles and conjugated polymers
Promotor: M.A.G.J. Orrit
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one-photon- and two-photon-excited single-molecule fluorescence by single gold nanorods
This thesis is a collection of experimental attempts to enhance photoluminescence of fluorescent molecules and quantum dots with single gold nanorods (GNRs) and relevant applications.
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A blue or gold background? NICAS grant awarded for research on restoration
Should the background of the painting remain blue or be restored to its original gold colour? PhD candidate Liselore Tissen will be using 3D prints and eye-tracking software to answer this question. NICAS is giving her a grant of 18,000 euros to accomplish this.
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Faso – beyond conflict minerals: The complex links between artisanal gold mining and violence
Policy Note Insecurity in Burkina Faso – beyond conflict minerals: The complex links between artisanal gold mining and violence
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Gold for Leiden Maths team
During the prestigious International Mathematics Competition in Blagoëvgrad, Burgary, the Leiden University team won one golden and four silver medals. The team included maths students Bob Zwetsloot, Daan van Gent, Onno Berrevoets, Pim Spelier and Wessel van Woerden.
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Visit the virtual Gold Matters exhibition
The virtual Exhibition Gold Matters is now live and can be explored online. This exhibition is the result of collaborations between artists, members of mining communities, and researchers of the Gold Matters’ project. Curating the exhibition is a collaborative effort of the Gold Matters Team with Sabine…
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Another gold for botanical artist Esmée Winkel
Alumna Esmée Winkel, scientific illustrator and botanical artist, has been awarded a gold medal by the British Royal Horticultural Society for a series of six watercolours.
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Gold nano-antennas reveal single molecules’ electrochemical properties
Individual molecules are extremely hard to see through feeble fluorescence. Tiny gold nanorods serve as new antennas to intensify their signal 500 times. Publication on 24 February in Angewandte Chemie.
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Singing is silver, hearing is gold: impacts of local FoxP1 knockdowns on auditory perception and gene expression in female zebra finches
The experiments described in this thesis employ local lentiviral knockdowns in brain areas of female zebra finches followed by behavioural assays consisting of preference and Go/Nogo tasks.
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Plasmonic enhancement of single-molecule fluorescence under one- and two-photon excitation
This thesis aims to improve the detection from ultra-weak single emitter by enhancing their emission properties with plasmonic nanostructures. We exploit the wet-chemically synthesized single crystalline gold nanorods (GNRs) as our basic frameworks in the whole studies, simply because of their unique…
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GOLD MATTERS: launch of NORFACE/Belmont Forum project on sustainability transformations in Artisanal and Small-scale Gold Mining
An international and multi-disciplinary research consortium spent two days at Leiden University for the launch of their ‘GOLD MATTERS’ project, funded jointly by NORFACE and Belmont Forum. The project 'Sustainability Transformations in Artisanal and Small-scale Gold Mining: A Multi-Actor and Trans-Regional…
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Insights into the mechanism of electrocatalytic CO2 reduction and concomitant catalyst degradation pathways
This work describes several studies into the electroreduction of carbon dioxide (CO2RR), both regarding mechanistical aspects and catalyst stability considerations. Mechanistic insights into carbon-carbon bond formation on a silver catalyst are described in Ch 2, were we find an acetaldehyde-like surface…
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Ingenious experiment finally reveals how gold oxidises water
Using a clever experiment, PhD candidate Shengxiang Yang discovered how gold electrodes convert water into oxygen. He is the first to unravel the mechanism of this reaction. Yang published his results in the journal ACS Catalysis.
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Olympic gold for Industrial Ecology student Dirk Uittenbogaard
Dirk Uittenbogaard, a student on the Delft-Leiden Master’s in Industrial Ecology, has won a gold medal for rowing at the Olympic Games in Tokyo. Uittenbogaard took gold in the men’s quadruple sculls, together with Abe Wiersma, Tone Wieten and Koen Metsemakers.
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Research Gold Matters in Volkskrant report on Burkina Faso
In October 2021 the Volkskrant published the article 'Rond de bloedgoudmijnen van Burkina Faso heerst de angst voor terreur' (Around the blood-gold mines of Burkina Faso, the fear of terror rules). In this report Carlijne Vos describes how Burkina Faso is rapidly destabilising. The lucrative gold mines…
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New funding for advanced microscopy using gold nanorods
A consortium of researchers from the Leiden Institute of Physics (LION), the Institute of Biology Leiden (IBL), and the Leiden Institute of Chemistry (LIC) received a FOM program grant to develop a novel way of studying individual proteins inside a cell using gold nanorods.
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Data science helps in speed skating race for gold
Winning gold in speed skating at the Olympic Games is not just a matter of training hard; data science can also lend a hand. Jeroen van der Eb of the Leiden Institute of Advanced Computer Science (LIACS) developed the measuring skate for this purpose, with which he recently won the Nationale Sportinnovator…
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Using gold particles to make the invisible visible
Gold nanoparticles give us a better understanding of enzymes and other molecules. Biswajit Pradhan, PhD candidate at the Leiden Institute of Physics, uses gold nanorods to study individual molecules that would be challenging to detect otherwise. Resulting knowledge can be applied to many research fields,…
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Ecologist Emilia Hannula receives Gold Medal in Teylers Museum
Soil ecologists Emilia Hannula (Leiden) and Elly Morriën (UvA) received the Golden Medal of Teylers Tweede Genootschap on 5 November. They received the prize for their submission to a competition on sustainable soil management.
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Student team iGEM Leiden wins gold in Boston
The adventure of iGEM Leiden has come to an end. The result: prizes for Best Therapeutic Project and Best Model, a gold medal, a successful crowdfunding campaign and of course their open-source research findings, which are available for the scientific community.
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Will wind turbines take the long track speedskaters to gold?
Team Jumbo-Visma is going for gold at the World Championships this weekend in Salt Lake City. For this, they have worked on a new special training method. The Data Mining and Sports group of the Leiden Institute of Advanced Computer Science (LIACS) was involved in the development of this method.
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Luning and Van de Camp about the research programme Gold Matters on NWO website
In an interview on the website of the NWO, Sabine Luning, Marjo de Theije and Esther van de Camp talk about the gold miners they met in various African and South American countries and they come to new insights.
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The Hague Program for Cyber Norms welcomes Visiting Fellow Josh Gold
We are delighted to welcome Josh Gold as Visiting Fellow of The Hague Program for Cyber Norms at Leiden University’s Institute of Security and Global Affairs from 1 - 9 May.
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Burkina Faso: Artisanal Gold Mining in the Context of Violent Insecurity
Over the last 5-6 years Burkina Faso has become seriously implicated in the rapid and dramatic changes in the geopolitical situation in the Sahel. The country, once reputed for its stability and safety, has come under the spotlight for the number of violent attacks and of internally displaced people.…
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Ilya Kokorin wins Gold Medal for the III 2020 Prize in International Insolvency Studies
Ilya Kokorin, Meijers PhD candidate at the Department of Financial Law, has been awarded the Gold Medal in the prestigious competition of the International Insolvency Institute (III), the 2020 Prize in International Insolvency Studies.
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Gea Hakker: ‘We aim to be the gold standard of language learning’
The Academic Language Centre (ATC) is one of the cornerstones of Leiden University. Director Gea Hakker explains how this organisation is providing quality (online) language courses and meeting new demands.
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Oxidation catalysis on Pt and Au: complexity of simple chemistry
Promotor: J.W.M. Frenken Co-Promotores: I.M.N. Groot; L.B.F. Juurlink
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Hot Nanoparticles
Gold nanoparticles show surprisingly strong interactions with light in the visible range, which can be divided into scattering, absorption, and photoluminescence.
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Contact
Do you have any questions about the Citizen Science Lab? Are you looking to participate in a local citizen science project? Do you want to establish a project for yourself and could use some support?
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Electrocatalysis for sustainable energy
Marc Koper’s research focuses on electrocatalysis and electrochemical surface science for sustainable energy and chemistry. Reactions of interest are the redox reactions of the oxygen/hydrogen cycle (water oxidation, hydrogen evolution), the carbon cycle (reduction of carbon dioxide, oxidation of small…
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Molecular electronics: Controlled manipulation, noise and graphene architecture
Atoms and molecules are the basic units of matter. If we keep dividing a bar of gold or a glass of water into smaller parts, at the end we are left with a single gold atom or a water molecule.
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Book launch: global gold production touching ground
Conference, Book launch
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Singing is silver, hearing is gold
PhD Defence
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Electrocatalysis of CO2/CO interconversion and Hydrogen Evolution in Bicarbonate Buffers
Bicarbonate buffer is largely found in nature due to its ability to regulate pH variations around neutral values. As the pH changes, so does the speciation of the buffer.
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Surface plasmon lasers
Surface plasmons (SPs) are surface waves at the interface between a dielectric and a good metal, and are formed by the interaction between light and the free electrons at the metal-dielectric interface. They provide strong field confinement for optical fields, opening new possibilities for enhanced…
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Quantitative live cell imaging of glucocorticoid receptor dynamics in the nucleus
In this thesis, the focus lies on studying glucocorticoid receptor dynamics in living cells with the aim of understanding how this transcription factor finds its DNA target sites to regulate transcription.
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Global Earth Matters: Mining, Materiality and the Museum - Gold
Conference
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Virtual Exhibition: Gold Matters – From Africa to the Amazon
Conference, Virtual Exhibition
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The Historical Sources of the Mali Empire Reconsidered
When did the Mali Empire disintegrate? What does the Sunjata heritage demonstrate about the political situation after 1600?
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Gold Nanorod Photoluminescence: Applications to Imaging and Temperature Sensing
PhD Defence