Results 211 to 220 of about 23,600 (270)

Pulse Generation by On‐Chip Dispersion Compensation at 8 µm Wavelength

Laser &Photonics Reviews, EarlyView.
This work demonstrates on‐chip pulse generation at 8 μm$\mathrm{\mu}\mathrm{m}$ using chirped Bragg gratings in SiGe graded‐index photonic circuits to compensate the quadratic phase of quantum cascade laser frequency combs. With this approach pulses as short as 1.39 ps were produced, close to the transform limit, representing a key step toward compact,
Annabelle Bricout, Mathieu Bertrand, Philipp Täschler, Barbara Schneider, Victor Turpaud, Stefano Calcaterra, Davide Impelluso, Marco Faverzani, David Bouville, Jean‐René Coudevylle, Samson Edmond, Etienne Herth, Carlos Alonso‐Ramos, Laurent Vivien, Jacopo Frigerio, Giovanni Isella, Jérôme Faist, Delphine Marris‐Morini   +17 more
wiley   +1 more source

One‐Step Solvothermal Synthesis of VS4@PC/rGO for High‐Performance Symmetric Supercapacitors

MetalMat, EarlyView.
VS4@PC/rGO ternary composites featuring a 3D skewer‐like structure have been synthesized via a facile one‐step in situ solvothermal approach. The assembled SSC device has a 1.4 V voltage window, achieves 46.1 Wh·kg−1 energy density at 374.8 W·kg−1, and demonstrates excellent long‐cycle stability.
Zhou Yu, Qiancheng Hao, Shuai Yan, Lingyan Huang, Yonglin Ye, Jijun Tang, Zhenguang Liu, Xuecheng Chen, Shiyun Li   +8 more
wiley   +1 more source

Ultrafast Microwave Nano-manufacturing of Fullerene-Like Metal Chalcogenides. [PDF]

Sci Rep, 2016
Liu Z, Zhang L, Wang R, Poyraz S, Cook J, Bozack MJ, Das S, Zhang X, Hu L.   +8 more
europepmc   +1 more source

Zinc Oxide‐Based Nanocomposite Photoelectrodes for Photoelectrochemical Water Splitting: A Review on Structural Modifications and Performance Optimization

Nano Select, EarlyView.
Zinc oxide (ZnO) is highlighted as a highly potential photoanode material owing to its unique properties and multifunctionality. Thorough investigations are conducted for the enhancement of ZnO photoelectrodes, including doping, semiconductor coupling, defect engineering, and the inclusion of metallic nanoparticles.
Akanksha S. Chougale, Snehal S. Wagh, Deepak R. Patil, Dhanaji B. Malavekar, Sandesh R. Jadkar, Dnyaneshwar R. Shinde, Shashikant P. Patole, Habib M. Pathan   +7 more
wiley   +1 more source

Recent Advances in Metal Chalcogenides (MX; X = S, Se) Nanostructures for Electrochemical Supercapacitor Applications: A Brief Review. [PDF]

Nanomaterials (Basel), 2018
Theerthagiri J, Karuppasamy K, Durai G, Rana AUHS, Arunachalam P, Sangeetha K, Kuppusami P, Kim HS.   +7 more
europepmc   +1 more source

Numerical Analysis of AgInSe2‐Based Thin‐Film Solar Cells Towards High Efficiency

Nano Select, EarlyView.
In this work, SCAPS‐1D is used to numerically explore AgInSe2‐based thin‐film solar cells. Using CuS, WSe2, and AlSb as back surface field (BSF) layers with a CdS window improves carrier separation and built‐in potential. AgInSe2's promise for high‐performance, stable, and environmentally friendly solar applications is demonstrated by the optimised CdS/
Aysha Siddika, Rafiqul Islam Sheikh
wiley   +1 more source

DFT Modeling and Impedance Spectroscopy Analysis of a High Performance Zirconia‐Based Solar Cell

Nano Select, EarlyView.
p‐SnS/n‐CdS heterojunction solar cells with Al‐ZnO/i‐ZnO window layers simulated using SCAPS‐1D and impedance spectroscopy enabled tracking of solar cell parameters. The optimal performance (η = 22.76%, Voc = 0.77 V) was achieved with a 5 µm SnS absorber at Rs = 1Ω.cm−2 and Rsh = 10 kΩ.cm−2.
George G. Njema, Rkia Zari, Elmostafa Elmesbahi, Abderrahmane Elmelouky, Abdelkhalek El Rharib, Abdelaziz Amine, Joshua K. Kibet, Mimoun Zazoui   +7 more
wiley   +1 more source

Epitaxy and Phase Stability of 2D Hexagonal Gallium Telluride on Silicon

physica status solidi (RRL) – Rapid Research Letters, EarlyView.
Two‐stage amorphization as a function of annealing temperature of continuous, strain‐free, high‐crystalline‐quality 2D hexagonal gallium telluride on silicon obtained by van der Waals epitaxy. Controlling crystal quality during epitaxial growth is essential for the advancement of novel materials with industrial relevance.
Andrea Pianetti, Stefano Cecchi, Michael Hanke, Jonathan J. Finley, Fabrizio Arciprete, Raffaella Calarco, Eugenio Zallo   +6 more
wiley   +1 more source

Substitutional Sulfur and Its Vibrational Fingerprints in Sb2Se3

physica status solidi (RRL) – Rapid Research Letters, EarlyView.
The microscopic configurations of sulfur incorporated into the Sb2$_2$Se3$_3$ lattice are studied by combining infrared absorption spectroscopy with density functional theory. Substitutional SSe$_{\mathrm{Se}}$ defects are identified as the origin of four distinct sulfur‐related local vibrational modes at 249, 273, 283, and 312 cm−1$^{-1}$.
Frank Herklotz, Eduard V. Lavrov, Vladlen V. Melnikov, Andreas Herklotz, Thomas P. Shalvey, Jon D. Major, Ken Durose   +6 more
wiley   +1 more source

Uncovering Exotic Topological Quantum States in Pure and Magnetically‐Doped Pyrite OsS2

Advanced Quantum Technologies, EarlyView.
Pyrite‐structured OsS2 is identified as a fragile topological insulator with an unprecedented 602 meV bandgap, featuring helical surface states and van Hove singularities amenable to ARPES verification. Magnetic doping with Pd, Fe, Ni, or Co induces phase transitions to strong topological insulators, semimetals, 3D quantum anomalous Hall insulators ...
Ali Sufyan, Hasan M. Abdullah, Gustav Johansson, Alexander C. Tyner, Hafiz Adil Qayyum, Ghulam Abbas Gilani, Rovi Angelo B. Villaos, Zhi‐Quan Huang, Feng‐Chuan Chuang, J. Andreas Larsson   +9 more
wiley   +1 more source