Results 131 to 140 of about 27,983,919 (299)

Helix Alignment, Chevrons, and Edge Dislocations in Twist‐Bend Ferroelectric Nematics

Advanced Science, EarlyView.
The recently discovered twist‐bend ferroelectric nematic (NTBF) is the new member of the multiferroic family, representing a fluid with an oblique helicoidal (heliconical) periodic structure of spontaneous electric polarization. The work presents a thorough exploration of the material properties of this phase, how the periodic modulation of ...
Bijaya Basnet, Priyanka Kumari, Sathyanarayana Paladugu, Damian Pociecha, Jakub Karcz, Przemysław Kula, Nataša Vaupotič, Ewa Górecka, Oleg D Lavrentovich   +8 more
wiley   +1 more source

Thermal Force Imaging of Hot Electrons in Operando Nanodevices

Nature Communications
The relentless pursuit of smaller, faster nanoelectronics concentrates intense heat at nanometer scales, threatening performance and reliability. Yet directly mapping this heat from nonequilibrium hot electrons has remained elusive. Here we introduce the
Weikang Lu, Ziyi Xu, Hewan Zhang, Svend Age Biehs, Achim Kittel, Ludi Qin, Xue Gong, Huanyi Xue, Yanru Song, Zhengyang Zhong, Shiyou Chen, Kun Ding, Wei Lu, Zhenghua An   +13 more
doaj   +1 more source

Infrared Thermography for Non-Destructive Testing of Cooling Hole Integrity and Flow Evaluation in Specimens Made with Innovative Technologies

Engineering Proceedings
This study developed a non-destructive testing (NDT) method using infrared thermography to inspect tubes with holes and slots made by electro-erosion and additive manufacturing.
Ester D’Accardi, Luca Ammannato, Alessandra Giannasi, Marco Pieri, Giuseppe Masciopinto, Francesco Ancona, Giovanni Santonicola, Davide Palumbo, Umberto Galietti   +8 more
doaj   +1 more source

Widely Electro Thermal Tunable Bulk-Micromachined MEMS-VCSEL Operating Around 850nm

, 2011
We present the highest reported continues tuning range of 37 nm and fastest electro thermal tuning speed of 700 Hz achieved with tunable vertical-cavity surface-emitting lasers (VCSEL) and semiconductor DBRs at 850 nm wavelength ...
Kögel, Benjamin,, Gierl, Christian,, Westbergh, Petter,, Meissner, Peter,, Larsson, Anders,, Zogal, Karolina,, Amann, M. C.,, Grasse, Christian,, Jatta, Sandro,, Gründl, Tobias,, Böhm, Gerhard,, Davani, Hooman A.,   +11 more
core  

ELDO-COMSOL based 3D electro-thermal simulations of power semiconductor devices2014 Semiconductor Thermal Measurement and Management Symposium (SEMI-THERM)

, 2014
In this work we present a novel simulation environment for analysis of electro-thermal interaction in power semiconductor devices. The developed solution is based on the joint use of ELDO-COMSOL simulators in an iterative scheme between an electrical 2D ...
RICCIO, MICHELE, ROMANO, GIANPAOLO, G. De Falco, DE FALCO, GIUSEPPE, IRACE, ANDREA, G. Breglio, MARESCA, LUCA, L. Maresca, A. Irace, BREGLIO, GIOVANNI, M. Riccio, G. Romano   +11 more
core   +1 more source

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Three-dimensional electro-thermal coupling analysis of ultra-high-voltage autotransformer based on MPI-PETSc parallel computing framework

Sustainable Energy Research
Ultra-high-voltage (UHV) autotransformers are widely employed in long-distance power transmission systems. Their operation involves complex energy conversion and coupling mechanisms, including high-intensity magnetic induction energy and strong induced ...
E. Tianlong, Kai Qin, Zhao Liu, Yanwen Xu, Linke Huang   +4 more
doaj   +1 more source

A Review on Catalytic Nanostructured Electrodes for Wearable and Implantable Abiotic Glucose Fuel Cells

Advanced Science, EarlyView.
This review identifies current and future directions in abiotic nanostructured catalysts to develop reliable and sustainable glucose fuel cells to power the next generation of bioelectronic devices. ABSTRACT The global rise in incidence of chronic diseases has led to the demand for innovative solutions that help patients manage their conditions with ...
Asghar Niyazi, Hannah S. Leese, Benjamin Metcalfe, Mirella Di Lorenzo   +3 more
wiley   +1 more source

Interlayer‐Sliding‐Enabled Multiferroicity and Giant Switchable Anomalous Hall Conductivity in RuO2Zn2F2 Bilayer

Advanced Science, EarlyView.
Interlayer sliding in the RuO2Zn2F2 bilayer induces ferroelectricity and enables reversible valley polarization switching. The electric dipole and valley‐resolved band edges are intimately coupled, revealing sliding ferroelectricity as a powerful mechanism for electrical control of valley degrees of freedom in 2D materials.
Djamel Bezzerga, Imran Khan, Ganie Suhail Ahmad, Jisang Hong   +3 more
wiley   +1 more source

Multidimensional and Multifunctional Laser‐Induced Graphene (LIG) for Point‐of‐Care and Wearable Biosensing, Theranostics, and Bioactive Interfaces Toward Personalized Healthcare and Regenerative Medicine

Advanced Science, EarlyView.
Multidimensional laser‐induced graphene (LIG) spanning from 0D to 3D architectures is comprehensively reviewed for multifunctional biomedical platforms, including biosensing, theranostics, and bioactive interface applications, which highlights its potentials for point‐of‐care diagnostics, wearable health monitoring, smart drug delivery, and tissue ...
Li Zhang, Yurou Yuan, Xiaohong Ding, Wing Cheung Mak   +3 more
wiley   +1 more source