Results 91 to 100 of about 29,052 (301)

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

Advanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies, Marcos Eduardo G. Carmo, Gonçalves J. Marrenjo, Stephan Reuther, Patrick Ganswindt, Antonio Otavio T. Patrocinio, Thomas Bein, Osmando F. Lopes, Jenny Schneider   +8 more
wiley   +1 more source

Enhanced Quadrature Hybrid Coupler Design for 5G N1 Band Using Defected Ground Structures

Jurnal Nasional Teknik Elektro
This study addresses the performance limitations of conventional hybrid couplers used in sub-6 GHz 5G infrastructure, targeting the N1 band (1.92–2.17 GHz), and integrates Defected Ground Structure (DGS) technology. The objective is to enhance bandwidth,
Rudy Fernandez, Amirul Luthfi, Syukri Yunus, Tiara Feryndita Astuti   +3 more
doaj   +1 more source

Complete Characterization of Novel MHMICs for V-Band Communication Systems

Journal of Electrical and Computer Engineering, 2013
This paper presents the characterization results of several new passive millimeter wave circuits integrated on very thin ceramic substrate. The work is focused on the design and characterization of a novel rounded Wilkinson power divider, a 90° hybrid ...
C. Hannachi, D. Hammou, T. Djerafi, Z. Ouardirhi, S. O. Tatu   +4 more
doaj   +1 more source

Mutual Coupling Reduction Techniques in Electronic Steering Antennas in X Band [PDF]

, 2011
This work provides the development of an antenna for satellite communications onboard systems based on the recommendations ITU-R S.580-6 [1] and ITU-R S.465-5 [2].
Exposito Dominguez, Gonzalo, Fernández González, José Manuel, Padilla de La Torre, Pablo, Sierra Castañer, Manuel   +3 more
core   +1 more source

Several experimental realizations of symmetric phase-covariant quantum cloner of single-photon qubits

, 2007
We compare several optical implementations of phase-covariant cloning machines. The experiments are based on copying of the polarization state of a single photon in bulk optics by special unbalanced beam splitter or by balanced beam splitter accompanied ...
Antonín Černoch, D. Dieks, Jan Soubusta, Jaromír Fiurášek, Lucie Bartůšková, Miloslav Dušek, N. J. Cerf   +6 more
core   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Design of an Ultra Compact 180-Degree Ring Coupler With Harmonic Suppression Using Composite Lines for Modern RF Systems

IEEE Access
This paper presents lumped reactive capacitors and inductors to create a compact filtering hybrid ring coupler (HRC) with a broad suppression band. The traditional 180-degree ring coupler has six long $\lambda $ /4 branches. In the proposed coupler, six
Saeed Roshani, Farid Zubir, Mohsen Karimi, Muhammad Akmal Chaudhary, Maher Assaad, Fawwaz Hazzazi, Noorlindawaty Md Jizat, Sobhan Roshani   +7 more
doaj   +1 more source

Demonstration of an All‐Optical AND Gate Mediated by Photochromic Molecules

Advanced Functional Materials, EarlyView.
A logic AND gate that runs on photons is demonstrated. It relies on two spatially separated photochromic molecules that work in tandem. Abstract The realization of a photonic logic AND gate, i.e. a logic AND gate that runs on photons rather than electrons, and where all steps are controlled by light, is demonstrated. In a proof‐of‐principle experiment,
Heyou Zhang, Max Gießübel, Pankaj Dharpure, Andrea Albert, Vira Niestierkina, Paul Mulvaney, Mukundan Thelakkat, Jürgen Köhler   +7 more
wiley   +1 more source

Selective Benzene Capture by Metal‐Organic Frameworks

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) hold significant potential for capturing benzene from air emissions and hydrocarbon mixtures in liquid phases. This capability stems from their precisely engineered structures, versatile chemistries, and diverse binding interactions.
Zongsu Han, Ankit Mondal, Jiatong Huo, Yihao Yang, Hong‐Cai Zhou   +4 more
wiley   +1 more source