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Eijt, S.W.H. (author), De Krom, T. W.H. (author), Chaykina, D. (author), Schut, H. (author), Colombi, G. (author), Cornelius, S. (author), Egger, W. (author), Dickmann, M. (author), Dam, B. (author)Doppler broadening positron annihilation spectroscopy depth profiles were collected on photochromic YO<sub>x</sub>H<sub>y</sub> thin films. In situ UV illumination of photochromic semiconductor YO<sub>x</sub>H<sub>y</sub> films leads to an increase in S-parameter and a large reduction in W-parameter, possibly caused by a change in the charge...journal article 2020
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Colombi, G. (author), Cornelius, S. (author), Longo, Alessandro (author), Dam, B. (author)Rare-earth (RE) oxyhydride thin films prepared by reactive magnetron sputtering followed by air-oxidation show a color-neutral photochromic effect at ambient conditions within a wide composition range (REOxH3-2x where 0.5 ≤ x < 1.5). Due to the high degree of anion sublattice disorder present in these thin films, the structure models...journal article 2020
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Single Quality Factor for Enthalpy-Entropy Compensation, Isoequilibrium and Isokinetic RelationshipsGriessen, Ronald (author), Boelsma, Christiaan (author), Schreuders, H. (author), Broedersz, Chase P. (author), Gremaud, Robin (author), Dam, B. (author)Enthalpy-entropy compensation (EEC) is very often encountered in chemistry, biology and physics. Its origin is widely discussed since it would allow, for example, a very accurate tuning of the thermodynamic properties as a function of the reactants. However, EEC is often discarded as a statistical artefact, especially when only a limited...journal article 2020
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Bocanegra Evans, Humberto (author), Dam, Nico (author), Bertens, Guus (author), van de Water, W. (author)We present a new technique to study preferential concentration of droplets in a turbulent air flow. Preferential concentration is the tendency of droplets to cluster in regions of strain, while avoiding regions of rotation. We study the properties of the droplet concentration field in zero mean flow turbulence that was created using an array...journal article 2020
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Cornelius, S. (author), Colombi, G. (author), Nafezarefi, F. (author), Schreuders, H. (author), Heller, R. (author), Munnik, Frans (author), Dam, B. (author)Thin films of rare-earth (RE)-oxygen-hydrogen compounds prepared by reactive magnetron sputtering show a unique color-neutral photochromic effect at ambient conditions. While their optical properties have been studied extensively, the understanding of the relationship between photochromism, chemical composition, and structure is limited....journal article 2019
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Nafezarefi, F. (author), Cornelius, S. (author), Nijskens, J. (author), Schreuders, H. (author), Dam, B. (author)Thin films of yttrium oxy-hydride have interesting, reversible photochromic properties, the origin of which is poorly understood. To investigate the role of point defect mobility, we probed the effect of lattice contraction as induced by the addition of zirconium. Interestingly, we find no loss of photochromic contrast for Y <sub>1-z</sub>...journal article 2019
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Bannenberg, L.J. (author), Nugroho, Ferry Anggoro Ardy (author), Schreuders, H. (author), Norder, B. (author), Trinh, Thuy-Trang (author), Steinke, N.J. (author), van Well, A.A. (author), Langhammer, Christoph (author), Dam, B. (author)Nanostructured metal hydrides are able to efficiently detect hydrogen in optical sensors. In the literature, two nanostructured systems based on metal hydrides have been proposed for this purpose each with its own detection principle: continuous sub-100 nm thin films read out via optical reflectance/transmittance changes and nanoparticle arrays...journal article 2019
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Valenti, M. (author), Prasad, Nitin P. (author), Kas, R. (author), Bohra, D. (author), Ma, M. (author), Balasubramanian, Vignesh (author), Chu, L. (author), Dam, B. (author), Smith, W.A. (author)CO <sub>2</sub> electroreduction is a promising technology to produce chemicals and fuels from renewable resources. Polycrystalline and nanostructured metals have been tested extensively while less effort has been spent on understanding the performance of bimetallic alloys. In this work, we study compositionally variant, smooth Au-Pd thin...journal article 2019
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Plokker, M.P. (author), Eijt, S.W.H. (author), Naziris, F. (author), Schut, H. (author), Nafezarefi, F. (author), Schreuders, H. (author), Cornelius, S. (author), Dam, B. (author)In order to investigate the mechanism of the photochromic effect in yttrium oxy-hydride (YO<sub>x</sub>H<sub>y</sub>) thin films, Doppler broadening positron annihilation spectroscopy (PAS) was applied to probe the electronic structure and the presence of vacancies in YO<sub>x</sub>H<sub>y</sub> and related materials as a function of...journal article 2018
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Baldi, Andrea (author), Mooij, L.P.A. (author), Palmisano, V (author), Schreuders, H. (author), Krishnan, Gopi (author), Kooi, Bart J. (author), Dam, B. (author), Griessen, Ronald (author)Magnesium thin films covered with a layer of Pd absorb hydrogen at much higher pressures than bulk Mg. Such an effect was originally explained as a consequence of elastic clamping on Mg by the capping Pd layer. An alternative interpretation later suggested that the pressure increase could originate from simple alloying between Mg and Pd. Here...journal article 2018
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Ngene, Peter (author), Longo, Alessandro (author), Mooij, L.P.A. (author), Bras, Wim (author), Dam, B. (author)Hydrogen is a key element in the energy transition. Hydrogen-metal systems have been studied for various energy-related applications, e.g., for their use in reversible hydrogen storage, catalysis, hydrogen sensing, and rechargeable batteries. These applications depend strongly on the thermodynamics of the metal-hydrogen system. Therefore,...journal article 2017
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Nafezarefi, F. (author), Schreuders, H. (author), Dam, B. (author), Cornelius, S. (author)Recently, thin films of yttrium oxy-hydride (YO<sub>x</sub>H<sub>y</sub>) were reported to show an unusual color-neutral photochromic effect promising for application in smart windows. Our present work demonstrates that also oxy-hydrides based on Gd, Dy, and Er have photochromic properties and crystal structures similar to YO<sub>x</sub>H<sub...journal article 2017
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Asano, K. (author), Westerwaal, R.J. (author), Schreuders, H. (author), Dam, B. (author)Nanometer-sized Mg hydride clusters may form in a self-organized way by the hydrogenation of a nonequilibrium Mg-Ti alloy. Here the Mg hydride is destabilized by the interface energy between the two metal hydrides. To obtain an even more destabilized Mg hydride, we increased the interface energy by the addition of Cr, which is immiscible with...journal article 2017
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Szilagyi, P.A. (author), Rogers, D. M. (author), Zaiser, I. (author), Callini, E (author), Turner, Stuart (author), Borgschulte, A (author), Züttel, A. (author), Geerlings, J.J.C. (author), Hirscher, M (author), Dam, B. (author)We have investigated the potential of metal-organic frameworks for immobilising single atoms of transition metals using a model system of Pd supported on NH<sub>2</sub>-MIL-101(Cr). Our transmission electron microscopy and in situ Raman spectroscopy results give evidence for the first time that functionalised metal-organic frameworks may...journal article 2017
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Boelsma, C. (author), Bannenberg, L.J. (author), Van Setten, M. J. (author), Steinke, N.J. (author), van Well, A.A. (author), Dam, B. (author)Hydrogen detection is essential for its implementation as an energy vector. So far, palladium is considered to be the most effective hydrogen sensing material. Here we show that palladium-capped hafnium thin films show a highly reproducible change in optical transmission in response to a hydrogen exposure ranging over six orders of magnitude...journal article 2017
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Dam, G. (author), van der Wegen, M. (author), Labeur, R.J. (author), Roelvink, D. (author)We hindcast a 110 year period (1860-1970) of morphodynamic behavior of the Western Scheldt estuary by means of a 2-D, high-resolution, process-based model and compare results to a historically unique bathymetric data set. Initially, the model skill decreases for a few decades. Against common perception, the model skill increases after that to...journal article 2016
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Didden, A. (author), Hillebrand, P. (author), Wollgarten, M. (author), Dam, B. (author), Van de Krol, R. (author)Conductive TiN shells have been deposited on SiO2 nanoparticles (10–20 nm primary particle size) with fluidized bed atomic layer deposition using TDMAT and NH3 as precursors. Analysis of the powders confirms that shell growth saturates at approximately 0.4 nm/cycle at TDMAT doses of >1.2 mmol/g of powder. TEM and XPS analysis showed that all...journal article 2016
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- Szilagyi, Petra (author), Serra Crespo, P. (author), Gascon, Jorge (author), Geerlings, J.J.C. (author), Dam, B. (author) journal article 2016
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Bannenberg, L.J. (author), Schreuders, H. (author), van Eijck, L. (author), Heringa, J.R. (author), Steinke, N.J. (author), Dalgliesh, R.M. (author), Dam, B. (author), Mulder, F.M. (author), van Well, A.A. (author)Nanostructuring is widely applied in both battery and hydrogen materials to improve the performance of these materials as energy carriers. Nanostructuring changes the diffusion length as well as the thermodynamics of materials. We studied the impact of nanostructuring on the hydrogenation in a model system consisting of a thin film of magnesium...journal article 2016
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Yoshimura, K. (author), Langhammer, C. (author), Dam, B. (author)The hydrogenation of metals often leads to changes in optical properties in the visible range. This allows for fundamental studies of the hydrogenation process, as well as the exploration of various applications using these optical effects. Here, we focus on recent developments in metal hydride-based optical fiber and plasmonic sensors and smart...journal article 2013