Results 221 to 230 of about 34,297 (264)

Broadband Parametric Amplification in AlGaAs‐on‐Insulator Nanowaveguides

Laser &Photonics Reviews, EarlyView.
Harnessing the exceptional nonlinearity of AlGaAs‐on‐insulator nanowaveguides, four‐wave‐mixing parametric amplification achieves a record net on‐chip gain of 56 dB and a gain bandwidth exceeding 415 nm at telecom wavelengths. These results establish AlGaAsOI as a powerful platform for compact, high‐performance integrated nonlinear optical ...
Yanjing Zhao, Chanju Kim, Yi Zheng, Chaochao Ye, Yueguang Zhou, Kresten Yvind, Minhao Pu   +6 more
wiley   +1 more source

Truncated Octahedral PtCu Alloy Nanoparticles for Efficient Methanol Electrooxidation

MetalMat, EarlyView.
Platinum–copper nano‐truncated octahedra are developed as efficient electrocatalysts for methanol oxidation in alkaline media, exhibiting notably enhanced activity compared to commercial Pt/C. Experimental and theoretical analysis reveals that alloying with copper modifies the electronic structure of platinum, facilitating the key reaction step and ...
Mengfei Liu, Haoran Chen, Jiahao Zheng, Yingying Wang, Yanyun Ma, Yiqun Zheng   +5 more
wiley   +1 more source

Optical coherence tomography-guided Brillouin microscopy highlights regional tissue stiffness differences during anterior neural tube closure in the Mthfd1l murine mutant.

Development
Ambekar YS, Caiaffa CD, Wlodarczyk BJ, Singh M, Schill AW, Steele JW, Zhang J, Aglyamov SR, Scarcelli G, Finnell RH, Larin KV.   +10 more
europepmc   +1 more source

Interface Phonon Transmission Behaviors and Their Resultant Influence on Thermal Transport in Cu/Diamond Composites

Materials Genome Engineering Advances, EarlyView.
Cu/diamond heat spreaders are limited by low thermal boundary conductance. Using DFT + DMM, we identify the phonon‐transport factors governing TBC and show that optical–phonon contributions and branch conversion are essential. High‐k $k$ carbides (B4C, WC) and residual B and Cr improve interfacial heat transfer, enabling robust performance versus ...
Qinghe Zheng, William Yi Wang, Leandro Bolzoni, Fei Yang   +3 more
wiley   +1 more source

Effect of Metal–Metal Distance on the Performance of Dual‐Atom Catalysts for the Oxygen Reduction Reaction: A Density Functional Theory and Micro‐kinetics Study

Small, EarlyView.
Density functional theory calculations and microkinetic modeling were carried out on 108 dual‐atom catalysts with varied metalmetal distances ranging from 2.2 to 3.5 Å. The results reveal that moderate spacing of around 3.0 Å promotes bridging oxygen adsorption and dissociative reduction pathways, weakens the hydroxylhydroperoxyl scaling relationship ...
Yu Mao, Yongfang Zhou, Mengjiao Li, Ziyun Wang, Run Shi, Lu Shang, Tierui Zhang, Geoffrey I. N. Waterhouse   +7 more
wiley   +1 more source

Laser‐Induced‐Structural Transformation in Ti3CNTx MXene Monitored by Raman Spectroscopy with DFT Insight

Small, EarlyView.
A multi‐wavelength Raman study of microwave‐assisted hydrothermal Ti3CNTx MXene, supported by theoretical calculations, identifies laser‐power thresholds and evaluates its ambient‐condition stability. ABSTRACT MXenes are emerging 2D nanomaterials that have attracted growing attention for their highly tunable atomic structure, composition, and surface ...
Subrata Ghosh, Narayan N. Som, Muhammad Abiyyu Kenichi Purbayanto, Dorota Moszczyńska, Anna Wójcik, Carlo S. Casari, Agnieszka Maria Jastrzębska, Madhurya Chandel   +7 more
wiley   +1 more source

Covalent Functionalization of NiFe Layered Double Hydroxides using Tris(Hydroxymethyl)Aminomethane

Small, EarlyView.
Covalent functionalization of NiFe layered double hydroxides with tris(hydroxymethyl)aminomethane enables controlled growth, enhanced structural order, and improved processability. Temporary TRIS anchoring promotes stable water‐based inks and binder‐free electrode fabrication, leading to enhanced oxygen evolution activity and long‐term stability under ...
Alvaro Seijas Da Silva, Federico Juarez‐Dominguez, Víctor Oestreicher, Martín Mizrahi, Diego Hunt, Bruno J. C. Vieira, Joao C. Waerenborgh, Valeria Ferrari, Gonzalo Abellán   +8 more
wiley   +1 more source

Single Cu Atom Sites on Co3O4 Activate Interfacial Oxygen for Enhanced Reactivity and Selective Gas Sensing at Low Temperature

Small, EarlyView.
Atomically dispersed Cu sites on Co3O4 nanoparticles establish well‐defined Cu–O–Co interfacial linkages that promote lattice oxygen activation at markedly reduced temperatures. This structural and electronic modulation yields over twenty‐fold higher low‐temperature formaldehyde sensing responses than CuO nanoparticle analogues, enabling selective and ...
Hamin Shin, Matteo D'Andria, Meng Yin, Jaehyun Ko, Ken Suzuki, Dong‐Ha Kim, Frank Krumeich, Andreas T. Güntner   +7 more
wiley   +1 more source

Selective Solar CO2 Conversion into Ethanol Using Atomic‐Scale Copper Clusters Anchored π‐extended Poly(heptazine imide)

Small, EarlyView.
Atomic‐scale copper clusters anchored on π‐extended poly(heptazine imide) enable selective, sacrificial‐agent‐free solar conversion of carbon dioxide (CO2) to ethanol. The catalyst promotes interfacial charge separation and stabilizes key carbon‐carbon coupling intermediates, providing a molecularly defined platform for direct C2 fuel synthesis under ...
Muhammad Zaeem Azam Khan, Shanmugasundaram Kamalakannan, Ramesh Poonchi Sivasankaran, Amol Uttam Pawar, Sanjeev Gupta, Sung‐hoon Oh, Young Seok Son, Minseong Kim, Sachin G. Ghugal, Kyoung Mo Park, Hongxian Han, Majdi Hochlaf, Young Soo Kang   +12 more
wiley   +1 more source

Ferromagnetic Cobalt Oxide With Structural Distortion and Oxidation State Changes for Hydrogen Sulfide Gas Detection

Small, EarlyView.
High H2S gas sensitivity was improved by electrochemically engineering Co3O4/CoO heterostructures with oxygen vacancies and aligning nanosized particles via magnetic‐field‐assisted deposition. This alignment enhanced gas diffusion and electron transport, reducing base resistance. The resulting sensor exhibited high selectivity and a strong response (Rg/
Shin Joon Kang, Chang Yoon Kim, Min Chan Kim, Sunhyeong Kwon, Joon‐Shik Park, Hyung Mo Jeong   +5 more
wiley   +1 more source