Results 81 to 90 of about 2,706,632 (222)

Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes

Advanced Functional Materials, EarlyView.
We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar, Fumikazu Murakami, Xing He, Konnor Koons, Xinyan Li, Bumseop Kim, Shihan Qin, Varun Harbola, Jochen Mannhart, Yimo Han, Ruijuan Xu, Shengxi Huang, Andrew M. Rappe, Hanyu Zhu   +13 more
wiley   +1 more source

Two-stage Charge Sensitive Amplifier with Self-biased MOS Transistor as Continuous Reset System

, 2013
A two-stage charge sensitive amplifier architecture suitable for semiconductor radiation detector with large capacitance is proposed. The integration capacitor of the first stage can be made large to reduce gain sensibility to detector capacitance ...
Chen Xiaolu, Lu Wengao, Chen Zhongjian, Zhang Yacong   +3 more
core   +1 more source

Monolithic Oxidation Enables Ultrathin Vertically Graded Tantalum Oxide for Low‐Voltage, Low‐Variability Memristive Switching

Advanced Functional Materials, EarlyView.
Monolithic UV‐ozone oxidation of Ta forms an ultrathin Ta2O5/TaOx bilayer enabling resistive switching with a vertical defect gradient. A stoichiometric surface layer over an oxygen‐deficient sublayer promotes localized filament nucleation near the top interface, enabling low‐voltage operation, and reduced cycle‐to‐cycle variability.
Seunghoon Yang, Dong Hyun Lee, Conan Weiland, Won‐Il Lee, Kim Kisslinger, Mingzhao Liu, Aswin kumar Anbalagan, Xiao Tong, Soumyajit Mandal, Nikhil Tiwale, Houk Jang, Chang‐Yong Nam   +11 more
wiley   +1 more source

Design of Fission Chamber Pulse Pre-amplifier

Journal of Isotopes
Fission chambers are installed in the measurement channels within the reactor and the signals are transmitted via inorganic and organic cables. They can be used for monitoring the neutron flux of the reactor from startup to full power operation.
Xinyi HUANG, Fangdong YANG, Yang LIU, Jiangbin ZHAO, Haifeng LIU, Chenyang TANG, Jiayu SUN, Zhan LIU, Gaokui HE   +8 more
doaj   +1 more source

Characterization of the semiconductor optical amplifier for amplification and photonic switching employing the segmentation model [PDF]

, 2008
This paper characterizes the gain and the carrier density responses of a semiconductor optical amplifier (SOA). In order to achieve the switching functions in SOA-based optical switches, such as Symmetric Mach-Zehnder (SMZ), the effect of the input ...
Ghassemlooy, Zabih, Ng, Wai Pang, R. Ngah, Z. Ghassemlooy, Moustafa H. Aly, Aly, Moustafa, M. F. Chiang, Chiang, Ming-Feng, Ngah, Razali, Abd El Aziz, W. P. Ng, Abd El Aziz, Ahmad   +11 more
core   +1 more source

Catalytically Enhanced Near Room‐Temperature Hydrogen Sensing Using Pd‐ZnO Colloidal Crystals

Advanced Functional Materials, EarlyView.
Pd‐decorated ZnO colloidal crystal monolayers demonstrate excellent performance across a wide hydrogen concentration range at 33°C, with high selectivity and reproducible device fabrication. The sensors show strong responses even at low‐ppm H2 concentrations and an ultra‐low detection limit of 82 ppb, indicating their suitability for diverse hydrogen ...
Hamidah Alluhaybi, Samuel J. Ippolito, Chung Kim Nguyen, Durairaj Mahendiran, Michelle J. S. Spencer, Edwin L. H. Mayes, Billy James Murdoch, Jason Choi, Shamali De Silva, James Tardio, Adrian Trinchi, Ahmad E. Kandjani, Mohammad Al Kobaisi, Ylias Sabri   +13 more
wiley   +1 more source

Low Noise Charge Sensitive Amplifier with Low Input Impedance [PDF]

IEEE Transactions on Nuclear Science, 1981
This amplifier was designed for use in a large array of proportional wire chambers with charge division readout and for cathode readout of proportional chambers. The single stage high gain (104) amplifier with FET input has low component count, low cost, and a high packing density of 32 channels per double-sided P. C. board.
openaire   +1 more source

A CMOS Charge Sensitive Amplifier with sub-electron equivalent noise charge

, 2014
We present a CMOS Charge Sensitive Amplifier (CSA) specifically designed for low capacitance pixel or silicon drift detectors for high resolution X-ray spectrometry. The intrinsic noise of the CSA has been measured at different operating temperatures
AHANGARIANABHARI, MAHDI, Giuseppe Bertuccio, Claudio Graziani, MACERA, DANIELE, Mahdi Ahangarianabhari, Graziani, Claudio, BERTUCCIO, GIUSEPPE, Daniele Macera   +7 more
core   +1 more source

Operando Tracking of Oxygen‐Vacancy Dynamics and Negative Capacitance in Ca‐Doped BiFeO3

Advanced Functional Materials, EarlyView.
Operando electrochemical impedance spectroscopy, combined with electrocoloration, enables a direct correlation between real‐space ionic redistribution and the corresponding frequency‐domain electrical response. In lateral Ca‐doped BiFeO3 devices, time‐resolved impedance snapshots capture the evolution from bulk‐dominated mixed conduction to an ...
Jeonghun Suh, Heung‐Sik Park, Jong‐Sook Lee, Chan‐Ho Yang   +3 more
wiley   +1 more source

Phase sensitive amplification in a highly nonlinear lead-silicate fibre

We experimentally demonstrate phase-sensitive amplification in a highly nonlinear lead-silicate W-type fibre. A phase-sensitive gain swing of 6dB was observed in a 1.56m sample of the fibre for a total launched power of ...
Shi, J.D., Petropoulos, P., Richardson, D.J., Poletti, F., Kakande, J., Loh, W.H., Ettabib, M.A., Petrovich, M.N., Ponzo, G.M., Jones, L., Slavík, R., Parmigiani, F., Feng, X.   +12 more
core   +1 more source