- document
-
Meyer, M. (author)The spin of a single electron or hole provides an attractive candidate for implementing a quantum bit when confined in a semiconductor quantum dot. Such a spin qubit is characterized by long coherence and short gate times. High-fidelity single and two-qubit operations have been demonstrated as well. Additionally, semiconductor quantum dots have...doctoral thesis 2024
- document
-
Venkatesh, Vijay (author)The global shift towards low-carbon and renewable energy sources, driven by climate concerns associated with fossil fuels, has positioned solar photovoltaics (PV) as a major alternative. With the increasing adoption of PV technologies, it is crucial to study various PV module types. This thesis focuses on the HyET Powerfoil, an amorphous silicon...master thesis 2024
- document
-
Mutu, H. (author)The purpose of work presented in this thesis is to investigate whether M5XB2 (M = Fe, Mn,V, Cr and X = Si, P) material system has potential as a room-temperature magnetocaloric application material by studying its crystal and magnetic structure, and magnetocaloric properties.doctoral thesis 2024
- document
-
Liu, C. (author), Li, Zhenming (author), Nie, Shuai (author), Skibsted, Jørgen (author), Ye, G. (author)Calcium sodium aluminosilicate hydrate C-(N-)A-S-H gels, formed through the alkali-activation of calcium silicate-based materials, may exhibit greater susceptibility to aqueous environments when compared to traditional C-(A-)S-H phases formed by hydration of blended Portland cements. This study investigates structural changes in synthesized C...journal article 2024
- document
-
Chen, Y. (author), de Lima, Luiz Miranda (author), Li, Zhenming (author), Ma, Bin (author), Lothenbach, Barbara (author), Yin, Suhong (author), Yu, Qijun (author), Ye, G. (author)The synthesis of N-A-S-H gel with high Si/Al ratios (>2) has been rarely reported in the literature, leaving the establishment of a reliable synthesis route as an open challenge. This paper aims to synthesize N-A-S-H gels with Si/Al ratios ranging from 1 to 3 and establish their thermodynamic database. The effects of reaction temperature,...journal article 2024
- document
-
Ojiyed, Hamutu (author), van den Berg, Maarten (author), Batashev, I. (author), Shen, Q. (author), van Dijk, N.H. (author), Brück, E.H. (author)The magnetocaloric properties of Mn<sub>5</sub>Si<sub>1-x</sub>P<sub>x</sub>B<sub>2</sub> (0 ≤ x ≤ 1) compounds were studied for energy harvesting applications. The crystal structure and the magnetic structure were characterized by powder X-Ray Diffraction and powder Neutron Diffraction. The results indicate that these magnetocaloric...journal article 2024
- document
-
Lai, J. (author), Huang, B. (author), You, X. (author), Maschek, M. (author), Zhou, Guofu (author), van Dijk, N.H. (author), Brück, E.H. (author)The Fe<sub>2</sub>P type Mn–Fe–P–Si alloys exhibit a giant magneto-elastic first-order transition, but the large hysteresis limits their performance. Crystal structure evolution and magnetocaloric performance were investigated by varying the Mn and Fe contents at a constant V substitution of 0.02 in Fe<sub>2</sub>P-type (Mn<sub>1.17-x</sub>Fe...journal article 2024
- document
-
Wang, Yan (author)The overdependence on the tradition energy source have caused a serious of ecologi-cal problems such as the increasing emission of carbon dioxide. To combat this and achieve carbon neutrality, attention has shifted towards sustainable energy, particu-larly wind, tidal, and solar energy. The solar cell catches significant interest due to its...master thesis 2023
- document
-
Wang, Haoyuan (author)The basic reproductive number (R0) of an infectious disease is the expected number of secondary cases infected by the first case in an otherwise susceptible population. In this thesis, based on this fundamental concept, we propose a new method: the IIN-TN method that could calculate R0 of a network from the local structure of the network under...master thesis 2023
- document
-
Kiecana, A. (author)The growing demand for energy highlights the need for developing more efficient and environmentally friendly technologies. Magnetic cooling based on the magnetocaloric effect is a promising alternative for compressor-based refrigeration. Among various magnetocaloric materials, Mn-based alloys appear especially attractive due to their low cost,...doctoral thesis 2023
- document
-
Achterberg, M.A. (author), Sensi, M. (author)The interplay between disease spreading and personal risk perception is of key importance for modelling the spread of infectious diseases. We propose a planar system of ordinary differential equations (ODEs) to describe the co-evolution of a spreading phenomenon and the average link density in the personal contact network. Contrary to...journal article 2023
- document
-
Zhang, F. (author), Smits, Sebastian (author), Kiecana, A. (author), Batashev, I. (author), Shen, Q. (author), van Dijk, N.H. (author), Brück, E.H. (author)The influence of doping with the 5d transition metal W has been studied in the quaternary (Mn,Fe)<sub>2</sub>(P,Si) based giant magnetocaloric compounds, which is one of the most promising systems for magnetic refrigeration. It is found that W substitution can separately decrease the Curie temperature T<sub>C</sub> and retain the thermal...journal article 2023
- document
-
Kiecana, A. (author), Kwakernaak, C. (author), van Dijk, N.H. (author), Brück, E.H. (author)The effect of the heat treatment on the magnetism, magnetocaloric effect and microstructure formation has been systematically studied in Fe-rich (Mn,Fe)<sub>y</sub>(P,Si) melt-spun ribbons (1.80 ≤ y ≤ 2.00). XRD, SEM and EDS measurements demonstrate that a metal deficiency prompts the stable (Mn,Fe)Si phase, whereas in the metal-rich region...journal article 2023
- document
-
Zhang, F. (author), Batashev, I. (author), van Dijk, N.H. (author), Brück, E.H. (author)The influence of off-stoichiometry and of doping with the 5d transition metal Ta has been studied in the quaternary (Mn,Fe)<sub>2</sub>(P,Si)-based compound, which is one of the most promising materials systems for magnetic refrigeration. It is found that Ta substitution can decrease the transition temperature T<sub>tr</sub>, while the...journal article 2023
- document
-
Du, Jinqing (author), Li, G. (author), Guo, Mingxing (author), Lu, Wenyi (author), Dong, Qijuan (author), Zhuang, Linzhong (author)In present work, the formation, evolution, and distribution of the primary Fe-rich phase in an Al–Mg–Si–Cu–Zn–Fe–Mn alloy are coupling controlled by ultrasonic melt treatment (USMT) and thermomechanical processing (TMP). It is shown in the results that the size of grains and Fe-rich phase in the as-cast state can be greatly reduced by the...journal article 2023
- document
-
Ungerer, J. H. (author), Chevalier Kwon, P. (author), Patlatiuk, T. (author), Ridderbos, J. (author), Kononov, A. (author), Sarmah, D. (author), Bakkers, E.P.A.M. (author), Zumbühl, D. (author), Schönenberger, C. (author)Spin qubits in germanium are a promising contender for scalable quantum computers. Reading out of the spin and charge configuration of quantum dots formed in Ge/Si core/shell nanowires is typically performed by measuring the current through the nanowire. Here, we demonstrate a more versatile approach on investigating the charge configuration...journal article 2023
- document
-
Bornheim, A. (author), Lustermann, W. (author), Stachon, K. (author), Reales Gutiérrez, G. (author), Benaglia, A. (author), De Guio, F. (author), Ghezzi, A. (author), Lucchini, M. T. (author), Malberti, M. (author)The barrel section of the novel MIP Timing Detector (MTD) will be constructed as part of the upgrade of the CMS experiment to provide a time resolution for single charged tracks in the range of 30-60 ps using LYSO:Ce crystal arrays read out with Silicon Photomultipliers (SiPMs). A major challenge for the operation of such a detector is the...journal article 2023
- document
-
Yang, G. (author), Gram, Remon (author), Procel Moya, P.A. (author), Han, C. (author), Yao, Z. (author), Singh, M. (author), Zhao, Y. (author), Mazzarella, L. (author), Zeman, M. (author), Isabella, O. (author)Passivating contacts based on poly-Si have enabled record-high c-Si solar cell efficiencies due to their excellent surface passivation quality and carrier selectivity. The eventual existence of pinholes within the ultra-thin SiOx layer is one of the key factors for carrier collection, beside the tunneling mechanism. However, pinholes are usually...journal article 2023
- document
-
Yao, Z. (author), Yang, G. (author), Han, C. (author), Procel Moya, P.A. (author), Özkol, E. (author), Yan, J. (author), Zhao, Y. (author), Cao, L. (author), van Swaaij, R.A.C.M.M. (author), Mazzarella, L. (author), Isabella, O. (author)Passivating contacts are crucial for realizing high-performance crystalline silicon solar cells. Herein, contact formation by plasma-enhanced chemical vapor deposition (PECVD) followed by an annealing step is focused on. Poly-SiO<sub>x</sub> passivating contacts by combining plasma-assisted N<sub>2</sub>O-based oxidation of silicon (PANO-SiO...journal article 2023
- document
-
Ding, Z. (author), Brouwer, J.C. (author), Kwakernaak, C. (author), Zhu, Jia-Ning (author), Popovich, V. (author), Hermans, M.J.M. (author), Sloof, W.G. (author)To prevent premature triggering of the healing reaction in Mo-Si containing self-healing thermal barrier coating system, an oxygen impenetrable shell (α-Al<sub>2</sub>O<sub>3</sub>) around the sacrificial healing particles (MoSi<sub>2</sub>) is desired. Here an encapsulation method is presented through selective oxidation of Al in Mo(Al<sub>x...journal article 2023