Results 141 to 150 of about 2,123,471 (302)

Multi‐Dimensional Physical‐Layer Security via Digitally Mediated Space–Time Modulation

Advanced Science, EarlyView.
Digitally mediated space–time modulation moves radiation control beyond hardware‐bound switching. Multiple information‐bearing and masking waveforms are jointly synthesized at baseband and coherently coupled to simple periodic time modulation, enabling programmable, independently directed multi‐beam radiation without increasing switching‐state ...
Kejin Chen, Heng Mao, Feng Yang, Gengbo Wu, Lei Zhang, Yikai Chen, Shi‐Wei Qu, Jun Hu, Shiwen Yang   +8 more
wiley   +1 more source

High‐Current‐Density Acidic CO2 Electroreduction to Formic Acid Enabled by Multiscale Microenvironment Regulation Over Defect‐Rich Sn/SnOx

Advanced Science, EarlyView.
Acidic CO2 electroreduction to formic acid is enabled by integrating mixed Sn/SnOx nanoclusters, K+‐regulated interfacial solvation, and Janus wettability. Coordinated control of active sites, interfacial water, and gas‐liquid transport suppresses hydrogen evolution and delivers approximately 85% HCOOH Faradaic efficiency at 400 mA cm−2.
Qiaoqi Guo, Bowen Jiang, Le Huang, Kunyu Jiang, Rongrong Tang, Qinong Zhu, Huajun Feng, Mengyang Fan, Yijing Xia   +8 more
wiley   +1 more source

Microwave-Absorbing Foams with Adjustable Absorption Frequency and Structural Coloration

Microwave-absorbing materials with regulatable absorption frequency and optical camouflage hold great significance in intelligent electronic devices and advanced stealth technology.
Xiao Liu (65413), Jianlin Li (1722952), Rui Liu (54031), Pengpeng Mou (10194735), Guizhen Wang (1800793), Lihong Wu (1666963), Jianguo Wen (228274), Haiming Lv (2065333), Jun Liu (42548), Jinchuan Zhao (8396310)   +9 more
core   +1 more source

High‐Temperature Magnetic Field Mapping Using a Single‐Crystal Diamond MEMS Resonator Array

Advanced Science, EarlyView.
A single‐crystal diamond MEMS resonator array enables magnetic‐field reconstruction with millisecond response, nanotesla level magnetic noise, and stable operation up to 573 K. Two‐ and three‐dimensional magnetic field mapping are demonstrated using ΔEeffect sensing, highlighting the potential of diamond MEMS technology for hightemperature magnetic ...
Zilong Zhang, Keyun Gu, Satoshi Koizumi, Masaya Toda, Meiyong Liao   +4 more
wiley   +1 more source

Multimodal Imaging of Hypoxia, Metabolism and pH in Feline Sarcoma Using Hyperpolarized 13C MRI and PET

Advanced Science, EarlyView.
This work presents a clinically deployable simultaneous PET/MRI workflow which integrates hyperpolarized 13C imaging of metabolism and extracellular pH with [18F]FMISO PET to characterize hypoxia, acidosis, and metabolic reprogramming in feline sarcoma.
Martin Grashei, Tanja Groll, Stephanie Kahl, Silke Baer, Elisabeth Bliemsrieder, Frits H. A. van Heijster, Andre Wendlinger, Pascal Wodtke, Jorge Cabello, Susan Notohamiprodjo, Christian Lohrmann, Markus Schwaiger, Wolfgang A. Weber, Katja Steiger, Andrea Meyer‐Lindenberg, Johannes Hirschberger, Christine Baumgartner, Franz Schilling   +17 more
wiley   +1 more source

Tailoring Electronic Structure of NbB2 Nanorods Through Selenium Incorporation for Synergistically Enhanced Hydrogen Evolution and Triboelectric Energy Harvesting

Advanced Science, EarlyView.
Selenium incorporation modulates the electronic structure of niobium diboride (Se‐NbB2) nanorods, enhancing the active site density and resulting in superior hydrogen evolution performance for sustainable energy applications. ABSTRACT The sluggish hydrogen evolution reaction (HER) kinetics of non‐noble‐metal catalysts remain a major challenge for ...
Shalmali R Burse, Vikram Mahamiya, Ali Mohammadi, Swapnil R Patil, Harshitha B Tyagaraj, Gagankumar S K, Amal AlGhafri, Ebrahim Al Hajri, Nilesh R. Chodankar, Yun Suk Huh, Young‐Kyu Han   +10 more
wiley   +1 more source

Reliability aspects of GaN microwave devices

, 2003
Rf drain-current (ID) collapse is the major factor limiting the output-power density at microwave frequencies in GaN-based FET's [1]. Its detrimental consequences on device performance have been put into evidence by using different experimental ...
R. PIEROBON, F. RAMPAZZO, ZANONI, ENRICO, PIEROBON, ROBERTO, G. Verzellesi, E. ZANONI, MENEGHESSO, GAUDENZIO, RAMPAZZO, FABIANA, G. MENEGHESSO, VERZELLESI, Giovanni, CHINI, ALESSANDRO   +10 more
core  

Customized Itinerant Frequency Combs by Cascaded Nonlinear Effects

Advanced Science, EarlyView.
A cascaded third‐order nonlinear system generates an itinerant frequency comb with the comb center frequency decoupled from the cavity resonance. This enables arbitrary spectral scaling, flexible spacing adjustments, and real‐time central‐frequency engineering, allowing comb splicing and subdivision. The resulting versatility and reconfigurability open
Yi Wang, Yulong Liu, Zeji Li, Wenyan Wang, Sihan Wang, Cheng Wang, Jingwei Zhou, Jie‐Qiao Liao, Tiefu Li   +8 more
wiley   +1 more source

3D-printed Chalk Powder for Microwave Devices: Experimental Results for a NRD-guide in Ku-Band

, 2017
Chalk powder for 3D printing by binder jetting as a novel material for microwave devices is proposed. The electromagnetic and mechanical properties of the chalk powder exhibit an interesting potential for microwave and mm-wave applications, with ...
P. F. Espin-Lopez, M. Pasian, E. Massoni, F. Auricchio, L. Perregrini, M. Bozzi, G. Alaimo, S. Marconi   +7 more
core  

Functional MXene Inks for Printed Electronics: Chemistry, Rheology, and Devices

Advanced Science, EarlyView.
Functional MXene inks are emerging as building blocks for MXetronics, connecting MXene synthesis, surface functionalization, ink formulation, and advanced printing with device‐level applications. This review maps how composition, stability, rheology, and processability govern printed structures and enable high‐performance sensors, energy‐storage ...
Shahzaib Ali, Faisal Shahzad, Hamza Hussain, Muhammad Abbas, Dae‐Hyun Cho, Doyoung Byun, Hassan A. Arafat   +6 more
wiley   +1 more source