- by Lyes Benterrouche, Djakaou Iya-Sou, Nofel Merbahi and Salah SahliThe generation of discharges from a DC voltage source for treating large polluted areas, such as soil, air, and water, has been investigated using an innovative approach. In this study, the deviceās effectiveness was assessed using deionized water as a target by analyzing geometric, electrical, and physicochemical parameters, as well as the production of hydrogen peroxide, nitrite, and nitrate. Electrical characterization of the discharge indicates that under the tested conditions, the discharge remains stable throughout treatment, resulting in constant production […]
- by Roman Pedan, Ivan Kruhlov, Pavlo Makushko, Oleksandr Dubikovskyi, Oleksandr Kosulya, Andrii Burmak, Andrii Orlov, Andrii Bodnaruk, Vladimir Golub, JĆ¼rgen Fassbender, Denys Makarov and Igor VladymyrskyiCoāPt thin films gained particular interest for applications in magnetic data storage and spintronics. Here, we report on the modification of structural and magnetic properties of Pt/Co bilayer stacks after 110 keV Kr+ irradiation with ion fluence varied from 1 Ć 1014 ions cmā2 to 1 Ć 1015 ions cmā2 followed by post-irradiation annealing at 550 Ā°C for 30 min. Structural characterization revealed that ion irradiation alone induces layers intermixing, leading to the formation of an equiatomic and Pt-rich CoāPt […]
- by David Rettke, Zahra Nasri, Nadia Mora-Barrantes, Antje Quade and Laura BarillasPolymer thin films have proven to be particularly suitable for the interfacing of bioreceptors and signal transducers in biosensors, with the capability of additionally equipping these thin films with nanomaterials that enable enhancement of the respective signal. In this study, a simple and cost-effective process for the production of gold nanoparticle (AuNP)-polymer composite thin films within a few seconds, based on plasma polymerization at atmospheric pressure, is presented. Plasma-polymerized films (pp-films) were studied for their chemical composition, morphology, and signal […]
- by Theeradech Sutheebanjerd, Natchanon Prechatavanich, Ming-June Wu, Chee-Keong Yee, Yi-Tzu Tseng, Zhi-An Lin, Yi-Hong Chen, Kuan-Heng Lin and Chao-Hsin WuResonant cavity light-emitting diodes (RCLEDs) are a promising candidate for micro light-emitting diode (micro-LED) displays due to their enhanced spectral purity and directional emission. However, the blueshift of the cavity mode at large angles leads to a significant angular color shift, which poses a challenge. This study investigates the optical properties of AlGaInP-based red RCLEDs using technology computer-aided design simulations, focusing on angular color shift. The results show that increasing the top distributed Bragg reflector (DBR) reflectance enhances spectral purity […]
- by Hoseong Yoo, Byung Hee Son, Jangsun Kim and Yeong Hwan AhnIn this study, we improved the spatial resolution of Terahertz (THz) time-of-flight (ToF) imaging by incorporating the in-situ surface-tracking method and reflective optics with a short focal length. We introduced an off-axis parabolic mirror with a focal length of 25.4 mm as a scan lens, which dramatically improved spatial resolution; with the full-width Rayleigh resolution reaching 0.46 mm. To overcome the limitations imposed by the narrow depth of focus in practical applications with large sample height variations, we have incorporated […]
- by Vaishnavi S M, Soumya Bandyopadhyay, Sabarigresan Murugan, Saswata Bhattacharyya and Ranjith RamaduraiThe morphotropic composition of the x(Ba0.7Ca0.3)TiO3ā(1āx)Ba(Zr0.2Ti0.8)O3 (BCZT) solid solutionāa lead-free ferroelectric materialāexhibits excellent piezoelectric properties at room temperature, making it a promising candidate for environmentally friendly device applications. Tuning the substrate-induced misfit strain offers a powerful approach to tailor the electromechanical response of ferroelectric thin films. In this study, an epitaxial thin film with the morphotropic phase composition was grown under compressive misfit strain on orthorhombic DyScO3 (001) substrates. Structural and piezoelectric characterizations revealed partial out-of-plane relaxation, with in-plane properties […]
- by Xinyu Xu, Cheng Zhang, Xia Gong, Jintao Zhang, Chenhua Ren, Wenyu Li, Bangdou Huang and Tao ShaoNanosecond surface dielectric barrier discharge (ns-SDBD) actuators have broad applications in flow control, where the discharge characteristics are significantly influenced by the pulse repetition frequency (PRF) through its modulation of surface ionization wave (SIW) dynamics. This study investigates the effects of PRFs and nanosecond-pulse number on energy accumulation mechanisms, discharge mode transitions, and SIW propagation in SDBDs. Experimental results show distinct discharge characteristics in the case of two dielectric barriers, epoxy glass cloth (FR-4) and polytetrafluoroethylene (PTFE), respectively. In the […]
- by Edilio Steven Cely Iza, Cristian David Tibambre Heredia and Carlos Arturo Ćvila BernalX-ray phase contrast imaging (XPCI) shows promising potential for analyzing blood vessels affected by a cardiovascular disease and may become a valuable diagnostic tool in angiography. Identifying the most suitable XPCI method for providing optimal visibility at clinically acceptable doses is critical. This study presents a two-dimensional computational simulation in Geant4 to quantitatively compare two XPCI techniquesāInline XPCI and Edge Illumination Single Mask (EISM)āin visualizing atherosclerotic plaques within the projected thickness image of the lumen. The angiographic specimen analyzed was […]
- by E R Cardozo de Oliveira, C Xiang, C BorrazĆ”s, S Sandeep, J E GĆ³mez, M Vasquez Mansilla, N Findling, L Largeau, N D Lanzillotti-Kimura and M GranadaSuperlattices (SLs) with spatially modulated elastic properties-particularly those based on IIIāV semiconductors-have emerged as key platforms for reaching the ultrahigh-frequency (GHzāTHz) regime in nanoacoustic devices. The exploration of alternative materials with multifunctional properties remains a rich and promising area of research. In this work, we investigate the structural, magnetic, and acoustic properties of nanometric Co/Pt SLs. X-ray reflectometry reveals a well-defined periodicity, while scanning transmission electron microscopy combined with local compositional analysis shows that the SLs exhibit a compositional modulation […]
- by Romana MikÅ”ovĆ”, Giovanni Ceccio, Josef NovĆ”k, Daniela PopelkovĆ”, Martin Å tāastnĆ½, Sebastiano Vasi, Sebastiano Trusso, Jan Luxa and Anna MackovĆ”Two-dimensional graphene-like materials such as molybdenum disulfide (MoS2) possess excellent physicochemical properties for photocatalysis and environmental sensing. This study reports on the fabrication of heterostructures combining MoS2 with ion-track-etched polyethylene terephthalate (PET) supports. The PET membranes were irradiated with 170 MeV Xe+ ions at a fluence of 1 Ć 106 cmā2 and subsequently etched in 9 M NaOH, yielding pore diameters of 0.38 Ā± 0.09 Ī¼m and 0.75 Ā± 0.11 Ī¼m. MoS2 films were deposited by pulsed laser deposition and […]
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