Results 151 to 160 of about 19,023 (293)

Pyridine‐Isomerism‐Driven Spin Engineering at a COP‐Fe3O4 Interface for High‐Performance Oxygen Reduction Electrocatalysis

Advanced Energy Materials, EarlyView.
Strategically adjusting the pyridine nitrogen position in the polymer matrix (pyridine isomerism) intensifies its interaction with embedded Fe3O4 nanocrystals. This enhanced interaction induces a spin‐state transition in Fe from low‐spin to intermediate‐spin, accompanied by refined d‐orbital properties.
Ruiqi Cheng, Xiaodong Lin, Qi Li, Yueying Chu, Xia Li, Huihuang Fang, Lin Zeng, Xinlin Hong, Alexandru Vlad, Guangchao Li, Feng Deng, Kwok‐yin Wong   +11 more
wiley   +1 more source

Multi-band and polarization insensitive metamaterial absorber

, 2011
—The design and realization of a multi-band and polariza-tion insensitive metamaterial absorber is presented. The structure with thickness 1.1mm consists of six close rings which distribute in two metallic layers separated by FR4 fiber glass PCB ...
H. Chen, L. Huang
core  

Toward Intelligent Multimodal Holography for Real‐Time Chemical Imaging of Dynamic Ion Separation

Advanced Intelligent Discovery, EarlyView.
Intelligent multimodal holography integrates digital off‐axis holography, spectroscopic imaging, and AI‐driven reconstruction to visualize ion transport and chemical dynamics in real time. In this perspective paper, we outline how this approach enables label‐free, chemically specific monitoring of complex environments and discuss its potential to ...
Giovanna Ricchiuti, Sarah I. Allec, Maxim Ziatdinov, Venkateshkumar Prabhakaran   +3 more
wiley   +1 more source

Direct generation of massive vector-mode entanglement from a polarization-insensitive optical amplifier. [PDF]

Sci Adv
Wang X, Wei Y, Zhang K, Pan X, Jing J.
europepmc   +1 more source

Patient‐Mounted Neuro Optical Coherence Tomography for Targeted Minimally Invasive Micro‐Resolution Volumetric Imaging in Brain In Vivo

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Herein, a patient‐mounted neuro optical coherence tomography system that integrates a 5 degrees‐of‐freedom skull‐mounted robot (Skullbot) with a 0.6 mm neuroendoscope for targeted, minimally invasive deep brain imaging, is developed. The system offers high‐resolution imaging with precise deployment, demonstrated through successful tumor imaging in a ...
Chao Xu, Zhiwei Fang, Huxin Gao, Tinghua Zhang, Tao Zhang, Peng Liu, Hongliang Ren, Wu Yuan   +7 more
wiley   +1 more source

Broadband Polarization-Insensitive Tunable Terahertz Metamaterial Absorber Based on an Asymmetric Graphene Structure. [PDF]

Nanomaterials (Basel)
Ali A, Al-Sowayan S, Shihzad W, Barkathulla A, Shamsan ZA, Alkanhal MAS, Aladadi YT.   +6 more
europepmc   +1 more source

Polarization-insensitive Archimedes'-spiral-shaped ultrathin metamaterial absorbers for microwave sensing application. [PDF]

Sci Rep, 2023
Lateef OS, Al-Badri M, Al-Badri KSL, Mohammed SA.   +3 more
europepmc   +1 more source

An ultra-compact polarization insensitive directional coupler

, 2008
We investigate the lag-effect in the dry etching process. In one etch step, asymmetric waveguides with a shallow groove in between can be fabricated.
He, Sailing,, Shi, Yaocheng,, Anand, Srinivasan,   +2 more
core  

Asymmetric α‐Alkylation With Activated and Unactivated Electrophiles by a Highly Productive and Recyclable Lewis Acid/Imidazolium Catalyst

Angewandte Chemie International Edition, EarlyView.
An air‐stable, easily prepared, bifunctional Cu(II)/imidazolium complex enables highly enantioselective α‐alkylation of 1,3‐dicarbonyls with outstanding productivity (TON up to 1740). Highlights include broad electrophile scope spanning π‐activated and nonactivated reagents, stereo‐retentive allylation, simple catalyst synthesis, and efficient catalyst
Johanna Haußmann, Alexander Beck, Dominik Hornung, Michael Mistele, Alexander Allgaier, Wolfgang Frey, Joris van Slageren, Johannes Kästner, René Peters   +8 more
wiley   +1 more source

Highly Efficient Polarization-Insensitive Wide-Angle Orthogonal Dipole Metasurface for Ambient Energy Harvesting. [PDF]

Micromachines (Basel)
Wei Y, Gao Z, Li H, Li Z.
europepmc   +1 more source