Results 111 to 120 of about 8,850 (277)

Ultra-low frequency photocurrent self-oscillation in strained InxGa1-xAs quantum well diodes

Ultra-low frequency photocurrent (PC) self-oscillation has been investigated in aIn0.15Ga0.85As/Al0.15Ga0.85As quantum-well (QW) diode in details as a function of temperature,excitation power and wavelength.
藤原, 賢三, Sano, N, Tanigawa, K, Fujiwara, Kenzo, フジワラ, ケンゾウ   +4 more
core  

Ti3C2Tx MXene/Silver Composite Foams For Lightweight, High‐Performance Electromagnetic Interference Shielding and Joule Heating

Advanced Materials Interfaces, EarlyView.
Ultrathin MXene/EMF composite foams achieve a specific shielding efficiency of 749.6 dB.dB·cm3$\mathrm{dB}\cdot {\mathrm{cm}}^{3}$/g, while the silver‐enhanced MXene/Ag/EMF reaches 81.4 dB shielding effectiveness at just 1.0 mm thickness. Both composites exhibit rapid Joule heating, retain stability up to 250∘C$^\circ{\rm C}$, and withstand 1000 ...
Abdullah A. Mahmood, Mingxuan Li, Vahid Rad, Mehdi Zarei, Chen‐Yu Yeh, Masoud Soroush, Guangyong Li, Paul W. Leu   +7 more
wiley   +1 more source

Minimally Invasive Delivery of Optical Nanosensors Using Injectable Hydrogels

Advanced Materials Interfaces, EarlyView.
Injectable peptide hydrogels offer a minimally invasive delivery platform for single‐walled carbon nanotube (SWCNT)‐based near‐infrared fluorescent sensors, enabling real‐time measurement of drug concentrations. Encapsulated SWCNTs show a dose‐dependent fluorescence response across physiologically relevant concentrations and retain their fluorescence ...
Shirel Kleiner, Gili Bisker
wiley   +1 more source

Development of Nanoflare Nanosensors for Monitoring Cellular Insulin mRNA in Beta Cells and Islets

Advanced Materials Technologies, EarlyView.
This study presents the design and application of In2‐NF probes for detecting insulin mRNA in beta cells and islets. Using spherical nucleic acid‐coated gold nanoparticles, the probes offer strong fluorescent signals upon hybridization. Their performance is validated across 2D and 3D cultures and rat islets, demonstrating sensitive, real‐time mRNA ...
Yana Hu, Qizheng Zhang, Tianli Hu, Juewen Liu, Hongxing Fu, Xin Zhao, Zijiang Yang, Chenjie Xu   +7 more
wiley   +1 more source

Synthesis of Electronic Frequency Tuning Units for Narrowband Ultra-Low Noise Oscillators with Surface Acoustic Waves Resonators

Известия высших учебных заведений России: Радиоэлектроника
Introduction. Modern radio engineering systems impose strict requirements on the stability of the frequency of microwave oscillation sources (microwave generators) included in their composition. However, microwave oscillators (on dielectric resonators or
V. A. Loiko, A. R. Safin, A. A. Boburkov
doaj   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

A Low-Power Top-Tail Inductive Filtered LC-VCO With Wide Tuning and Ultra-Low Phase Noise for Ku-Band Applications

IEEE Access
Accurate and stable local oscillation is essential in high-speed RF communication systems, imposing strict performance requirements on LC-voltage-controlled oscillators (LC-VCOs).
Dereddy Anuradha, Abdul Majeed Kottampara Kuppalath, Vasudeva Reddy Kuppireddy   +2 more
doaj   +1 more source

Characterization of Droplet Formation in Ultrasonic Spray Coating: Influence of Ink Formulation Using Phase Doppler Anemometry and Machine Learning

Advanced Materials Technologies, EarlyView.
This study explores how machine learning models, trained on small experimental datasets obtained via Phase Doppler Anemometry (PDA), can accurately predict droplet size (D32) in ultrasonic spray coating (USSC). By capturing the influence of ink complexity (solvent, polymer, nanoparticles), power, and flow rate, the model enables precise droplet control
Pieter Verding, Danny E. P. Vanpoucke, Yunus T. Aksoy, Tobias Corthouts, Maria R. Vetrano, Wim Deferme   +5 more
wiley   +1 more source

Optoelectronic Oscillators: Progress from Classical Designs to Integrated Systems

Photonics
Optoelectronic oscillators (OEOs) have emerged as indispensable tools for generating low-phase-noise microwave and millimeter-wave signals, which are critical for a variety of high-performance applications.
Qidi Liu, Jiuchang Peng, Juanjuan Yan
doaj   +1 more source

Ultra-Low Power Cross-Band Backscatter Networks

In wireless communication systems, the ability to switch frequencies is crucial, but it poses challenges in backscatter systems due to the limitations in generating adjustable high-frequency signals on a backscatter tag without exceeding power budget ...
Jing, Nan, Guo, Xiuzhen, Liu, Boya
core   +1 more source