Searched for: subject%3A%22atomic%255C%2Blayer%255C%2Bdeposition%22
(1 - 20 of 50)
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Zhang, F. (author), Wu, K. (author), La Zara, D. (author), Sun, F. (author), Quayle, Michael J. (author), Petersson, Gunilla (author), Folestad, Staffan (author), Chew, Jia Wei (author), van Ommen, J.R. (author)For dry powder inhaled formulations, good flow behaviour is vital in re-dispersing the powder. However, inhaled drug powders with a particle size below 10 µm are classified as highly cohesive materials with poor flow characteristics. Here we demonstrate how to alter the flow properties of micronized budesonide powders by depositing different...journal article 2023
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van der Zalm, Joost (author)One of the main components used in superconducting quantum chips is the Josephson junction. Currently when fabricating Josephson junctions, the resistance uniformity at wafer-scale is not optimal. It is also known that an annealing process can alter the junction resistance and with it the qubit frequency. However, laser annealing has only shown...master thesis 2022
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Moyo, Welldone (author), Chaukuraa, Nhamo (author), Motsaa, Machawe M. (author), Msagatia, Titus A.M. (author), Mambab, Bhekie B. (author), Heijman, Sebastiaan (author), Nkambulea, Thabo T.I. (author)This work investigates the enhancement of antifouling properties of ceramic nanofiltration membranes by surface modification via atomic layer deposition (ALD) of TiO<sub>2</sub>. Feed solutions containing bovine serum albumin (BSA), humic acid (HA) and sodium alginate (SA) were used as model foulants. The classic fouling mechanism models and...journal article 2022
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Benz, D. (author), Van Bui, Hao (author), Hintzen, H.T.J.M. (author), Kreutzer, M.T. (author), van Ommen, J.R. (author)The photocatalytic mechanism of TiO<sub>2</sub> (P25) nanoparticles coated with SiO<sub>2</sub> (SiO<sub>2</sub>:TiO<sub>2</sub>) by atomic layer deposition was investigated. The deposition of SiO<sub>2</sub> on TiO<sub>2</sub> not only gives a photocatalytic improvement for the degradation of both Rhodamine B (3.6–fold) and Acid Blue 9 (3...journal article 2022
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Li, M. (author), Fu, S. (author), Saedy, S. (author), Rajendrakumar, Aparna (author), Tichelaar, F.D. (author), Kortlever, R. (author), van Ommen, J.R. (author)Preparing supported nanoparticles with a well-defined structure, uniform particle size, and composition using conventional catalyst synthesis methods, such as impregnation, precipitation, and deposition-precipitation is challenging. Furthermore, these liquid phase methods require significant solvent consumption, which has sustainable issues...journal article 2022
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Pak, A. (author), Nanbakhsh, K. (author), Hölck, Ole (author), Ritasalo, Riina (author), Sousa, Maria (author), Van Gompel, Matthias (author), Pahl, Barbara (author), Wilson, J.M. (author), Kallmayer, Christine (author), Giagka, Vasiliki (author)Liquid crystal polymer (LCP) has gained wide interest in the electronics industry largely due to its flexibility, stable insulation and dielectric properties and chip integration capabilities. Recently, LCP has also been investigated as a biocompatible substrate for the fabrication of multielectrode arrays. Realizing a fully implantable LCP...journal article 2022
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La Zara, D. (author)The majority of pharmaceutical products is made of solid powders. The morphology and surface characteristics of drug particles affect both their bulk behaviour, e.g., flowability, dispersibility and tabletability, in the manufacturing process of dosage forms as well as their bioavailability upon administration into the human body. For instance,...doctoral thesis 2021
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La Zara, D. (author), Zhang, F. (author), Sun, F. (author), Bailey, Maximilian R. (author), Quayle, Michael J. (author), Petersson, Gunilla (author), Folestad, Staffan (author), van Ommen, J.R. (author)The wettability of pharmaceuticals is a key physical property which influences their dissolution rate, dispersibility, flowability and solid-state stability. Here, we provide a platform of surface nanoengineering methods capable of tuning the wettability of drug powders from high hydrophilicity to superhydrophobicity with drug loadings up to...journal article 2021
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La Zara, D. (author), Sun, F. (author), Zhang, F. (author), Franek, Frans (author), Balogh Sivars, Kinga (author), Horndahl, Jenny (author), Bates, Stephanie (author), Brännström, Marie (author), van Ommen, J.R. (author)Ideal controlled pulmonary drug delivery systems provide sustained release by retarding lung clearance mechanisms and efficient lung deposition to maintain therapeutic concentrations over prolonged time. Here, we use atomic layer deposition (ALD) to simultaneously tailor the release and aerosolization properties of inhaled drug particles...journal article 2021
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Passivation Enhancement of Poly-Si Carrier-Selective Contacts by Applying ALD Al_2O_3 Capping LayersYang, G. (author), Van de Loo, Bas (author), Stodolny, Maciej (author), Limodio, G. (author), Melskens, Jimmy (author), Isabella, O. (author), Weeber, A.W. (author), Zeman, M. (author), Kessels, W. M.M. (author)Hydrogenation of polycrystalline silicon (poly-Si) passivating contacts is crucial for maximizing their passivation performance. This work presents the application of Al2O3 prepared by atomic layer deposition as a hydrogenating capping layer. Several important questions related to this application of Al2O3 are addressed by comparing results...journal article 2021
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Benz, D. (author)Photocatalysts, contrary to conventional catalysts, utilize light to drive a reaction. By absorption of photons, electrons are excited and reach higher states to initiate a redox reaction. This principle can be broadly used to produce chemicals such as hydrogen via the reduction of water or transform carbon dioxide into solar fuels, i.e.,...doctoral thesis 2020
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Oh, Il-Kwon (author), Kin, Woo-Hee (author), Zeng, Li (author), Singh, Joseph (author), Bae, D. (author), Mackus, Adriaan J.M. (author), Song, Jeong-Gyu (author), Seo, Seunggi (author), Song, Bonggeun (author)We introduce the synthesis of hybrid nanostructures comprised of ZnOnanocrystals (NCs) decorating nanosheets and nanowires (NWs) of MoS2prepared byatomic layer deposition (ALD). The concentration, size, and surface-to-volume ratio ofthe ZnO NCs can be systematically engineered by controlling both the number of ZnOALD cycles and the properties of...journal article 2020
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Martín-Sómer, Miguel (author), Benz, D. (author), van Ommen, J.R. (author), Murugán, Javier (author)This work presents the evaluation of the photocatalytic activity of P25 TiO<sub>2</sub> particles, coated with SiO<sub>2</sub>, using atomic layer deposition (ALD) for the photocatalytic removal of methylene blue, oxidation of methanol and inactivation of Escherichia coli bacteria in water and its comparative evaluation with bare P25 TiO<sub...journal article 2020
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Benz, D. (author), Bui, Hao Van (author), Hintzen, H.T.J.M. (author), Kreutzer, M.T. (author), van Ommen, J.R. (author)Photocatalysts for water purification typically lack efficiency for practical applications. Here we present a multi-component (Pt:SiO<sub>2</sub>:TiO<sub>2</sub> (P25)) material that was designed using knowledge of reaction mechanisms of mono-modified catalysts (SiO<sub>2</sub>:TiO<sub>2</sub>, and Pt:TiO<sub>2</sub> ) combined with the...journal article 2020
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Prodanovic, V. (author)For decades, photomultiplier tubes (PMTs) have been the most common choice in single photon detection, covering the spectral range from deep-ultraviolet to nearinfrared. PMT is a vacuum tube with three crucial components: photocathode, chain of dynodes and anode. At the photocathode, photons are converted to electrons in a photoelectric effect,...doctoral thesis 2019
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Pandey, Saksham (author)Hydrogenated Indium Oxide (IOH) has been recognized as a high performance transparent conductive oxide (TCO) due to its excellent mobility (>100 cm2/Vs) and high transparency (>90%) in the visible and near infrared region of the spectrum. Plasma enhanced spatial atomic layer deposition (PESALD), a new type of deposition process developed...master thesis 2019
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Zhang, Di (author), La Zara, D. (author), Quayle, Michael J. (author), Petersson, Gunilla (author), van Ommen, J.R. (author), Folestad, Staffan (author)The morphology, size, and surface properties of pharmaceutical particles form an essential role in the therapeutic performance of active pharmaceutical ingredients (APIs) and excipients as constituents in various drug delivery systems and clinical applications. Recent advances in methods for surface modification, however, rely heavily on...journal article 2019
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Moyo, Welldone (author), Motsa, Machawe M. (author), Chaukura, Nhamo (author), Msagati, Titus A.M. (author), Mamba, Bhekie B. (author), Heijman, Sebastiaan (author), Nkambule, Thabo T.I. (author)This work reports on the fundamental factors influencing inter-foulant and foulant-membrane interactions during simulated dissolved organic matter removal using ceramic nanofiltration. Fouling tests were performed using sodium alginate (SAL), humic acid (HA) and bovine serum albumin (BSA) as model foulants. Fouling potentials of each foulant and...journal article 2019
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Szmyt, Wojciech (author), Calame, Michel (author), Padeste, Celestino (author), Dransfeld, C.A. (author)We aim to enhance the carbon fibre (CF)-matrix interface by synthesizing carbon nanotubes (CNTs) on the surface of the CF, creating a hierarchical composite. A 12 nm thick aluminium oxide film applied by atomic layer deposition (ALD) provides protection of the CF from deterioration during CNT growth in a chemical vapour deposition (CVD)...conference paper 2019
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Feng, Liying (author)Natural Organic Matter (NOM) is always present in the drinking water sources such as rivers, lakes and reservoirs. It causes several problems, including the unfavourable colour and odour of water, formation of disinfectant by-products and harmful microbial growth. In drinking water treatment, anion exchange (anion-IEX) is used for NOM removal....master thesis 2018
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