Results 61 to 70 of about 72,244 (304)

Cool Kitchen: Processing Starch and Eggshell Powder into Sustainable Coatings for Passive Daytime Cooling

Advanced Functional Materials, EarlyView.
A food‐grade cooling composite made from starch and recycled eggshell powder offers a scalable, ultra‐low‐cost solution for passive daytime radiative cooling. Easily prepared using basic kitchen tools, this material empowers communities, even in areas with limited infrastructure, to stay cooler during worsening summer heat waves.
Qimeng Song, Evelyn Kubacki, Alexander Berger, Markus Retsch   +3 more
wiley   +1 more source

Multifrequency broadband polarized horn antenna [PDF]

, 1981
A corrugated conical horn antenna is simultaneously fed a multiplicity of signals, two for each of five frequencies, with each of a pair of signals fed in each of two orthogonal planes for excitation of a desired spherical hybrid mode.
Green, K. A.
core   +1 more source

Hybrid Plasmonic Waveguide Fed Broadband Nano-antenna for Nanophotonic Applications

, 2014
In this paper, we propose a novel hybrid plasmonic waveguide fed broadband optical patch nano-antenna for nanophotonic applications. Through full wave electromagnetic simulation, we demonstrated our proposed antenna to radiate and receive signal at all ...
Chowdhury, Arshad M., Khalil, Md Ibrahim, Rahman, Atiqur, Saad-Bin-Alam, Md   +3 more
core   +1 more source

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

A high-gain terahertz MIMO antenna design based on broadband near-zero refractive index metamaterials

Materials Research Express
In this research, we introduce a design of broadband zero-index metamaterials (ZIM). The proposed broadband ZIM comprises two identical layers of octagonal gold exhibiting four-fold rotational symmetry, with a dielectric layer situated in between ...
Zhanyun Lai, Fei Liu, Haochong Xu, Yuanyuan Zhang, Bingke Li, Ailing Zhang   +5 more
doaj   +1 more source

Compact Broadband Dual ZOR Antenna for Multiband Smart Mobile Phone Applications

International Journal of Antennas and Propagation, 2017
A compact broadband dual zeroth-order resonator (ZOR) antenna is proposed for multiband smart mobile phone applications. The theory of broadband zeroth-order mode and multimode technique is used to design the proposed antenna covering GSM850 (824–894 MHz)
Jeong Keun Ji
doaj   +1 more source

Performance enhancement of dual‐polarised dipole antenna using parasitic elements

IET Microwaves, Antennas & Propagation, 2022
In this paper, a differentially fed broadband dual‐polarised dipole antenna with parasitic elements is proposed. The presented antenna comprises a pair of strip dipoles as driven elements, four square patches as internal parasitic elements, four ...
Lei Wang, Rui Zhang, Yunfei En, Zhangming Zhu   +3 more
doaj   +1 more source

Circular‐Polarization‐Sensitive Organic Photodetectors with a Chiral Nanopatterned Electrode Inverse‐Designed by Genetic Algorithm

Advanced Functional Materials, EarlyView.
A chiral photodetector capable of selectively distinguishing left‐ and right‐handed circularly polarized light is experimentally demonstrated. The device, which features a nanopatterned electrode inverse‐designed by a genetic algorithm within a metal–dielectric–metal nanocavity that incorporates a vacuum‐deposited small‐molecule multilayer, exhibits ...
Kyung Ryoul Park, Jewoong Lee, In‐Suk Choi, Changsoon Kim   +3 more
wiley   +1 more source

Atomic‐Scale Light Coupling Control in Ultrathin Photonic Membranes

Advanced Functional Materials, EarlyView.
Ultrathin photonic nanomembranes provide atomic‐scale control over the coupling between incident light and high‐Q photonic modes, enabling angstrom‐level resonance tuning and strong field confinement. When integrated with TMD monolayers, they further yield enhanced light–matter interactions, offering a versatile platform for advancing quantum photonics,
Chih‐Zong Deng, Chun‐Hao Chiang, Sunhao Shi, Jui‐Han Fu, Yen‐Ju Wu, Kuniaki Konishi, Vincent Tung, Chun‐Wei Chen, Ya‐Lun Ho   +8 more
wiley   +1 more source

Analysis and Design of a Novel Compact Multiband Printed Monopole Antenna

International Journal of Antennas and Propagation, 2013
A compact multiband printed monopole antenna is presented. The proposed antenna, composed of a modified broadband T-shaped monopole antenna integrating some band-notch structures in the metallic patch, is excited by means of a microstrip line.
Junjun Wang, Xudong He
doaj   +1 more source