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Sousanis, Andreas (author), Biskos, G. (author)In this review paper, we provide an overview of state-of-the-art Pd-based materials for optical H2 sensors. The first part of the manuscript introduces the operating principles, providing background information on the thermodynamics and the primary mechanisms of optical detection. Optical H2 sensors using thin films (i.e., films without any...review 2021
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Mohammadi, Mohsen Doust (author), Abdullah, Hewa Y. (author), Biskos, G. (author), Bhowmick, Somnath (author)There is a compelling reason to design cost-effective sensors to detect and measure harmful molecules such as dichlorosilane (H<sub>2</sub>SiCl<sub>2</sub>) in the air. In this work, density functional theory (DFT) has been used to study the nature of the intermolecular interactions between the H<sub>2</sub>SiCl<sub>2</sub> gas molecule with...journal article 2021
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Mohammadi, Mohsen Doust (author), Abdullah, Hewa Y. (author), Bhowmick, Somnath (author), Biskos, G. (author)The feasibility of detecting diazomethane (CH<sub>2</sub>N<sub>2</sub>) in the gas phase by adsorption onto the exterior surface of inorganic-based X<sub>12</sub>O<sub>12</sub> (where X can be Be, Mg, or Ca) nanocages is investigated here using DFT. All the structures, including those of the pristine CH<sub>2</sub>N<sub>2</sub> and of the...journal article 2021
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Loizidis, C. (author), Costi, M. (author), Lekaki, N. (author), Bezantakos, S. (author), Biskos, G. (author)The Differential Mobility Analyzer (DMA) is currently the most effective instrument for sizing sub-micrometer aerosol particles. An important requirement to ensure good performance in terms of sizing accuracy and resolution is that the flow field remains laminar and undisturbed along its classification zone. To achieve that, a flow straightener ...journal article 2020
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Salmatonidis, A. (author), Viana, M. (author), Biskos, G. (author), Bezantakos, S. (author)We report measurements of the size, concentration, and hygroscopicity of ultrafine particles (UFPs) emitted during thermal spraying of ceramic coatings in an industrial setting. High concentrations (i.e., higher than 10<sup>6</sup> cm<sup>−3</sup>) of fractal-like UFPs were measured inside the spraying booths of the facility. The emitted UFPs...journal article 2020
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Mamali, D. (author), Mikkilä, J. (author), Henzing, B (author), Spoor, R. (author), Ehn, M. (author), Petäjä, T. (author), Russchenberg, H.W.J. (author), Biskos, G. (author)Long-term measurements of PM<sub>2.5</sub> mass concentrations and aerosol particle size distributions from 2008 to 2015, as well as hygroscopicity measurements conducted over one year (2008–2009) at Cabauw, The Netherlands, are compiled here in order to provide a comprehensive dataset for understanding the trends and annual variabilities of...journal article 2018
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Mamali, D. (author), Marinou, Eleni (author), Sciare, Jean (author), Pikridas, Michael (author), Kokkalis, Panagiotis (author), Kottas, Michael (author), Binietoglou, Ioannis (author), Tsekeri, Alexandra (author), Keleshis, Christos (author), Engelmann, Ronny (author), Baars, Holger (author), Ansmann, Albert (author), Amiridis, Vassilis (author), Russchenberg, H.W.J. (author), Biskos, G. (author)In situ measurements using unmanned aerial vehicles (UAVs) and remote sensing observations can independently provide dense vertically resolved measurements of atmospheric aerosols, information which is strongly required in climate models. In both cases, inverting the recorded signals to useful information requires assumptions and constraints,...journal article 2018
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Kourmouli, A. (author), Valenti, M. (author), van Rijn, E. (author), Beaumont, H.J.E. (author), Kalantzi, Olga Ioanna (author), Schmidt-Ott, A. (author), Biskos, G. (author)The use of disc diffusion susceptibility tests to determine the antibacterial activity of engineered nanoparticles (ENPs) is questionable because their low diffusivity practically prevents them from penetrating through the culture media. In this study, we investigate the ability of such a test, namely the Kirby-Bauer disc diffusion test, to...journal article 2018
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Giamarelou, M (author), Smith, M. (author), Papapanagiotou, E. (author), Martin, S. T. (author), Biskos, G. (author)The hygroscopic properties of KBr, KCl, and KI nanoparticles having diameters from 8 to 60 nm were measured using a tandem Differential Mobility Analyzer. In all cases, the deliquescence and efflorescence relative humidity values increased with decreasing particle diameter. The associated growth factors also decreased with decreasing particle...journal article 2018
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Bezantakos, Spyros (author), Schmidt-Ott, F.F.A. (author), Biskos, G. (author)Air quality monitoring using airborne platforms is rapidly gaining ground as unmanned aerial vehicles (UAVs) are becoming easier, less expensive, and safer to operate on a routine basis. To facilitate measurements of key atmospheric properties, however, efforts are still required in developing/testing miniaturized instruments for use onboard...journal article 2017
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Valenti, M. (author), Venugopal, A. (author), Tordera, Daniel (author), Jonsson, P.M. (author), Biskos, G. (author), Schmidt-Ott, A. (author), Smith, W.A. (author)The conversion of light to electrical and chemical energy has the potential to provide meaningful advances to many aspects of daily life, including the production of energy, water purification, and optical sensing. Recently, plasmonic nanoparticles (PNPs) have been increasingly used in artificial photosynthesis (e.g., water splitting) devices...journal article 2017
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Surawski, N. C. (author), Bezantakos, S (author), Barmpounis, K. (author), Dallaston, M. C. (author), Schmidt-Ott, A. (author), Biskos, G. (author)Recent advanced in the fields of nanotechnology and atmospheric sciences underline the increasing need for sizing sub-10-nm aerosol particles in a simple yet efficient way. In this article, we develop, experimentally test and model the performance of a High-Pass Electrical Mobility Filter (HP-EMF) that can be used for sizing nanoparticles...journal article 2017
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Bezantakos, S. (author), Giamarelou, M. (author), Huang, L. (author), Olfert, J. (author), Biskos, G. (author)Differential mobility analyzers (DMAs) are widely used to determine the size of aerosol particles, and to probe their size-dependent physicochemical properties when two are employed in tandem. A limitation of tandem DMA (TDMA) systems is their long measuring cycle when the properties of more than one monodisperse population of particles need...journal article 2016
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Feng, J. (author), Guo, Xiaoai (author), Ramlawi, N. (author), Pfeiffer, T.V. (author), Geutjens, R. (author), Basak, S. (author), Nirschl, Hermann (author), Biskos, G. (author), Zandbergen, H.W. (author), Schmidt-Ott, A. (author)High-yield and continuous synthesis of ultrapure inorganic nanoparticles (NPs) of well-defined size and composition has invariably been one of the major challenges in nanotechnology. Employing green techniques that avoid the use of poisonous and expensive chemicals has been realized as a necessity for manufacturing NPs on an industrial scale. In...journal article 2016
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Feng, J. (author), Hontañón, Esther (author), Blanes, Maria (author), Meyer, Jörg (author), Guo, Xiaoai (author), Santos, Laura (author), Paltrinieri, L. (author), Ramlawi, N. (author), de Smet, L.C.P.M. (author), Nirschl, Hermann (author), Kruis, Frank Einar (author), Schmidt-Ott, A. (author), Biskos, G. (author)A major challenge in nanotechnology is that of determining how to introduce green and sustainable principles when assembling individual nanoscale elements to create working devices. For instance, textile nanofinishing is restricted by the many constraints of traditional pad-dry-cure processes, such as the use of costly chemical precursors to...journal article 2016
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Bougiatioti, Aikaterini (author), Bezantakos, Spiros (author), Stavroulas, Iasonas (author), Kalivitis, Nikos (author), Kokkalis, Panagiotis (author), Biskos, G. (author), Mihalopoulos, Nikolaos (author), Papayannis, Alexandros (author), Nenes, Athanasios (author)This study investigates the concentration, cloud condensation nuclei (CCN) activity and hygroscopic properties of particles influenced by biomass burning in the eastern Mediterranean and their impacts on cloud droplet formation. Air masses sampled were subject to a range of atmospheric processing (several hours up to 3 days). Values of the...journal article 2016
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Giamarelou, Maria (author), Eleftheriadis, Konstantinos (author), Nyeki, Stephan (author), Tunved, Peter (author), Torseth, Kjetil (author), Biskos, G. (author)Previous long-term observations have shown that nanoparticle formation events are common in the summer-time high Arctic and linked to local photochemical activity. However, current knowledge is limited with respect to the chemical precursors of resulting nanoparticles and the compounds involved in their subsequent growth. Here we report case...journal article 2016
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Valenti, M. (author), Jonsson, M.P. (author), Biskos, G. (author), Schmidt-Ott, A. (author), Smith, W.A. (author)Photoelectrochemical (PEC) water splitting is a promising technology that uses light absorbing semiconductors to convert solar energy directly into a chemical fuel (i.e., hydrogen). PEC water splitting has the potential to become a key technology in achieving a sustainable society, if high solar to fuel energy conversion efficiencies are...journal article 2016
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Feng, J. (author), Biskos, G. (author), Schmidt-Ott, A. (author)Continuous gas-phase synthesis of nanoparticles is associated with rapid agglomeration, which can be a limiting factor for numerous applications. In this report, we challenge this paradigm by providing experimental evidence to support that gas-phase methods can be used to produce ultrapure nonagglomerated “singlet” nanoparticles having tunable...journal article 2015
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Kumar, A. (author), Kumar, P. (author), Anandan, A. (author), Fernandes, T.F. (author), Ayoko, G.A. (author), Biskos, G. (author)The aim of this study is to identify current knowledge gaps in fate, exposure, and toxicity of engineered nanomaterials (ENMs), highlight research gaps, and suggest future research directions. Humans and other living organisms are exposed to ENMs during production or use of products containing them. To assess the hazards of ENMs, it is important...journal article 2014