Results 121 to 130 of about 64,276 (298)

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Ultra-Wideband Low-Noise Amplifier

, 2012
Ultra-Wideband (UWB) Low-Noise Amplifier (LNA) is an essential part of the digital TV and UWB signal processor, but what makes it hard to design is the comprehensive consideration of bandwidth, noise and gain control performance.
Yang, Haibo, Cui, Quanshun, Su, Jiao, Lei, Kaizhuo, Shang, Jintao   +4 more
core   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Ultralow-Noise Chopper Amplifier for Seafloor E-Field Measurement

Sensors
The seafloor E-field signal is extremely weak and difficult to measured, even with a high signal-to-noise ratio. The preamplifier for electrodes is a key technology for ocean-bottom electromagnetic receivers.
Sixuan Song, Kai Chen
doaj   +1 more source

Design of a Differential Low-Noise Amplifier Using the JFET IF3602 to Improve TEM Receiver. [PDF]

Micromachines (Basel), 2022
Wang S, Zhao Y, Sun Y, Wang W, Chen J, Zhang Y.   +5 more
europepmc   +1 more source

Low Noise Amplifier

, 2021
This MQP report describes the implementation of a low noise amplifier (LNA) as a preamplifier for a 7T Magnetic Resonance Imaging (MRI) machine. The background explores the need for LNAs and the general noise, gain, and applications of LNAs.
Miller Minkel, Daniel H, Sanchez Martinez, Luis David   +1 more
core  

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

A 0.6 V low-power 3.5 GHz CMOS low noise amplifier for WiMAX applications

, 2013
[[abstract]]In this letter, a low-voltage and low-power 3.5-GHz low noise ampli?er (LNA) is designed and fabricated using TSMC 0.18-lm MS/RF complementary metal-oxide-semiconductor ?eld effect transistor (CMOS) technology.
Jeng-Han Tsai;Yi-Jhang Lin;Hao-Chun Yu
core  

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

Advanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau, Christian N. Saggau, Stefan Baunack, Thomas Gemming, Yara Abdelaal, Robert Weser, Oliver G. Schmidt, Hagen Schmidt, Andreas Winkler, Mariana Medina‐Sánchez   +9 more
wiley   +1 more source

An Experimental Investigation of the Degradation of CMOS Low-Noise Amplifier Specifications at Different Temperatures. [PDF]

Micromachines (Basel), 2022
Zhou S, Wang J.
europepmc   +1 more source