Results 51 to 60 of about 1,130 (256)
Numerical investigation of acoustic solitons; pp. 304–310 [PDF]
Proceedings of the Estonian Academy of Sciences, 2015 Acoustic solitons can be obtained by considering the propagation of large amplitude sound waves across a set of Helmholtz resonators. The model proposed by Sugimoto and his coauthors has been validated experimentally in previous works.
Bruno Lombard +2 more
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Advanced Materials, EarlyView.Ionic cocrystal‐programmed ionic organization establishes a general strategy for electrostatic programming in polymeric photocatalysts. ABSTRACT Controlling the spatial organization of ions in polymeric photocatalysts remains a fundamental challenge for optimizing charge transport and catalytic selectivity in solar‐driven hydrogen peroxide (H2O2 ...
Anna Lo Presti +6 more
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Descriptor‐Informed Screening of Interface‐Active Molecules for Efficient Magnesium Metal Anodes
Advanced Materials, EarlyView.A descriptor‐informed molecular screening strategy identifies 4‐bromo‐N, N‐dimethylaniline (BrNNA) as an interface‐active electrolyte component that enables fast Mg stripping/plating in Mg(TFSI)2‐based electrolytes. By simultaneously regulating Mg2+ solvation and interphase formation, the BrNNA‐containing electrolyte delivers activation‐free Mg ...
Hao Xu +16 more
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Numerical study of acoustic characteristics of sound-absorbing structures of various configurations
Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроениеThe acoustic characteristics of Helmholtz resonators with various configurations in the frequency range of 500…3000 Hz were simulated. The influence of the resonator shape, perforation diameter, volume and position of the resonator neck on the natural ...
P. V. Pisarev +2 more
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Broadband acoustic double-zero-index cloaking with coupled Helmholtz resonators
New Journal of Physics, 2022 Acoustic double-zero-index metamaterials (DZIM) characterized by extremely large phase velocity along with no phase changes of the wave propagation inside the materials have received tremendous attention due to the fascinating physics and potential ...
WenQin Wang +4 more
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Influence of the neck shape for Helmholtz resonators [PDF]
The Journal of the Acoustical Society of America, 2017 The resonance of a Helmholtz resonator is studied with a focus on the influence of the neck shape. This is done using a homogenization approach developed for an array of resonators, and the resonance of an array is discussed when compared to that of a single resonator.
Mercier, Jean-François +2 more
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Advanced Materials, EarlyView.ReCl47‐bpy is developed as a solar‐rechargeable, Re‐functionalized two‐dimensional metal–organic framework (MOF) for light‐driven charge storage and dark utilization. Re–bipyridine sites stabilize photoinduced electrons, enabling two complementary configurations: a MOF suspension for long‐lived charge retention and dark H2 evolution, and a spin‐coated ...
Shufan Wu +8 more
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Helmholtz resonators with large aperture
, 1998 The lowest resonant frequency of a cavity resonator is usually approximated by the classical Helmholtz formula. However, if the opening is rather large and the front wall is narrow this formula is no longer valid. Here we present a correction which is of third order in the ratio of the diameters of aperture and cavity.
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Millifluidic Synthesis of Core–Shell Resonators For Tunable Sonic BandGaps in Acoustic Metamaterials
Advanced Materials Interfaces, EarlyView.Millimeter‐scale core–shell acoustic resonators are fabricated by a gravity‐assisted dripping approach and incorporated into epoxy composites at controlled volume fractions. The resulting alumina–core resonator composites show tunable low‐frequency acoustic attenuation, demonstrating a scalable route for integrating locally resonant metamaterial units ...
Colton Steiner +5 more
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Gate‐Induced Critical Current Modulation in W–C Nanowires: The Role of Fabrication
Advanced Materials Technologies, EarlyView.Focused ion beam induced deposition (FIBID) enables precise control of superconducting W–C nanowire devices. Introducing a Ga+ focused ion beam (FIB) cleaning step reduces substrate damage and suppresses leakage currents, shifting gating thresholds to higher voltages.
Alba Arroyo‐Fructuoso +2 more
wiley +1 more source