Herein we experimentally study magnetic multilayer metamaterials with broken translational symmetry. Epitaxially-grown iron-gold (Fe-Au) multilayers modulated using Fibonacci sequence-referred to as magnetic inverse Fibonacci-modulated multilayers (IFMs)-are prepared using ultra-high-vacuum vapor deposition. Experimental results of in-situ reflection high-energy electron diffraction, magnetization curves, and ferromagnetic resonance demonstrate that the epitaxially-grown Fe-Au IFMs have quasi-isotropic magnetization, in contrast to the in-plane magnetization easy axis in the periodic multilayers.
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http://dx.doi.org/10.3390/ma10101209 | DOI Listing |
Nat Food
January 2025
Department of Electrical and Computer Engineering, Princeton University, Princeton, NJ, USA.
Fruits and vegetables account for around a third of all food loss and waste. Post-harvest, retail and consumer losses and waste could be reduced with better ripeness assessment methods. Here we develop a sub-terahertz metamaterial sticker (called Meta-Sticker) that can be attached to a fruit to provide insights into the edible mesocarp's ripeness without cutting into the produce.
View Article and Find Full Text PDFSci Rep
December 2024
Department of Materials and Metallurgical Engineering, Amirkabir University of Technology, Tehran, 15875-4413, Iran.
This study explores the impact of metallic shells by electroforming method on the mechanical behavior of thermoplastic polyurethane (TPU)-based lattice structures. First, the TPU lattice structures were printed by additive manufacturing technique. Then layers of Ni and Cu as a thin shell were dressed on the TPU lattice structures in the electroforming baths of Ni and Cu solutions.
View Article and Find Full Text PDFNanoscale
December 2024
National Key Laboratory of Advanced Micro and Nano Fabrication Technology, Shanghai Jiao Tong University, Shanghai, 200240, China.
Broadband metamaterial absorbers in the long wavelength infrared region are promising in applications including thermal imaging, cloaking, radiative cooling and IR signature suppression. Although high absorption over the long wavelength infrared region has been extensively achieved, the challenge is to shrink both the thickness and lateral footprint of unit absorbing structures. Here, a compact broadband long wavelength infrared metamaterial absorber consisting of multilayered Ge/Ti/Ge/SiO hybrid cylindrical structures, whose period and thickness are only ∼1.
View Article and Find Full Text PDFSci Adv
December 2024
Howard Hughes Medical Institute, Cornell University, Ithaca, NY 14853, USA.
The angular optical trap (AOT) is a powerful technique for measuring the DNA topology and rotational mechanics of fundamental biological processes. Realizing the full potential of the AOT requires rapid torsional control of these processes. However, existing AOT quartz cylinders are limited in their ability to meet the high rotation rate requirement while minimizing laser-induced photodamage.
View Article and Find Full Text PDFNanophotonics
March 2024
Taizhou Hospital, Zhejiang University, Taizhou, China.
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