Results 81 to 90 of about 60,171 (287)

Covalent bonding and the nature of band gaps in some half-Heusler compounds

, 2005
Half-Heusler compounds \textit{XYZ}, also called semi-Heusler compounds, crystallize in the MgAgAs structure, in the space group $F\bar43m$. We report a systematic examination of band gaps and the nature (covalent or ionic) of bonding in semiconducting 8-
Brewer L, Claudia Felser, Hem Chandra Kandpal, Jepsen O Andersen O K, Nanda B R K, Ram Seshadri, Stoner E C, Villars P, Zintl E   +8 more
core   +1 more source

Anomalous Pressure‐Temperature Ultrahigh Sensitivities in Atomically Engineered Carbonitride MXenes for Multifunctional Wearable Human–Machine Interfaces: Joint Computational–Experimental Elucidations

Advanced Functional Materials, EarlyView.
Atomically engineered layered 2D Ti3CNTz carbonitride MXene exhibits ultrahigh heat and pressure sensitivity, enabling dual‐mode sensors with 300%–400% performance enhancement and durability for real‐time health‐monitoring interface devices. Precise nitrogen incorporation (e.g., Ti3C1.8N0.2Tz) boosts conductivity, enhancing temperature response, while ...
Debananda Mohapatra, Ju‐Hyoung Han, Hyun Jin Kang, Jeong Eun Byun, Seonghun Lee, Sanghyuk Lee, Yeseul Son, Jaeeun Park, Tae Joo Shin, Youngho Kang, Jung Woo Lee, Soon‐Yong Kwon, Soo‐Hyun Kim   +12 more
wiley   +1 more source

Fabrication of Pyridinic Nitrogen‐Functionalized Carbon Cloth for High‐Performance Iron‐Chromium Flow Batteries

Advanced Functional Materials, EarlyView.
The carbon cloth electrode with targeted pyridinic nitrogen doping, achieved via urea pyrolysis, effectively modulates the adsorption of Cr(II) species and enhances electron transfer, leading to significantly improved kinetics of the Cr(II)/Cr(III) reaction. The material demonstrates a high discharge capacity of 689.3 mAh and an energy efficiency of 72.
Jinfeng Yi, Senwei Zeng, Runfa Zhao, Guangfu Wu, Zhi Liu, Tianhang Zhou, Chunming Xu, Jia Guo, Quan Xu, Yingchun Niu   +9 more
wiley   +1 more source

How do chemical properties of the atoms change under pressure

, 2015
Abundant evidence has shown the emergence of dramatic new chemical phenomena under pressure, including the formation of unexpected crystal structures and completely new counterintuitive compounds.
Dong, Xiao, Oganov, Artem R., Qian, Guangrui, Wang, Hui-Tian, Zhou, Xiang-Feng, Zhu, Qiang   +5 more
core  

Trifluoromethoxylated Electron Acceptor Enabling Ternary Organic Solar Cells with over 20% Power Conversion Efficiency

Advanced Functional Materials, EarlyView.
ABSTRACT In this work, we introduce a trifluoromethoxy (OCF3) group as a pseudo‐halogen terminal group design for non‐fullerene acceptors, which combines strong inductive electron‐withdrawing ability with moderate resonance donation. The as‐synthesized BTP‐OCF3, when benchmarked against its methoxy analogue BTP‐OCH3, demonstrates narrowed bandgap ...
Chunliang Li, Anhai Liang, Shuwei Qiu, Gavin Ho Ming Ng, Aleksandr Sergeev, Joshua Yuk Lin Lai, Bosen Zou, Xianghao Zeng, Jicheng Yi, Hongxiang Li, Junpo Guo, Wei Liu, Jia Yao, Kam Sing Wong, Zhipeng Kan, Sai Ho Pun, He Yan   +16 more
wiley   +1 more source

Electronegativity determination of individual surface atoms by atomic force microscopy

Nature Communications, 2017
Electronegativity is a fundamental concept in chemistry; however it is an elusive quantity to evaluate experimentally. Here, the authors estimate the Pauling electronegativity of individual atoms on a surface via atomic force microscopy using a variety ...
Jo Onoda, Martin Ondráček, Pavel Jelínek, Yoshiaki Sugimoto   +3 more
doaj   +1 more source

Enhanced Li‐Ion Battery Performance with Hybrid MXene/GnR Electrodes: Heterojunctions and Engineered Architectures Supported by DFT Mechanistic Studies for Improved Rate Performance, Stability & Capacity

Advanced Functional Materials, EarlyView.
Lithium‐ion batteries (LIBs) remain central to energy storage but suffer from slow ion transport and degradation. Here, we present a binder‐free Ti3C2Tx MXene/GnR hybrid electrode with a porous 3D architecture formed via freeze casting. The structure enhances conductivity, ion transport, and stability, delivering 401 mAh/g, ∼97% efficiency, and 92 ...
Sara Mohseni Taromsari, Meysam Salari, Dipali Nayak, Saeed Habibpour, Ling Wei Hwang, Cristopher Carreiro, Carlos M. Da Silva, Aiping Yu, Chul B. Park, Cristina H. Amon, Hani E. Naguib   +10 more
wiley   +1 more source

Dysfunctional high-density lipoprotein: an updated review

Frontiers in Cardiovascular Medicine
High-density lipoprotein (HDL) has earned its reputation as “good” cholesterol in cardiovascular health, primarily because of its strong inverse association with cardiovascular disease. A potential mechanism for this association is its ability to promote
Frances W. Ouyang, Huan-Hsing Chiang, Wen-Li Hsu, Ming-Hsien Tsai, Chun-Yao Huang, Alan T. Remaley, Omer Akyol, Chu-Huang Chen   +7 more
doaj   +1 more source

Balancing the anionic framework polarity for enhanced thermoelectric performance in YbMg2Sb2 Zintl compounds

Journal of Materiomics, 2019
1-2-2-type Zintl phase compound has aroused great interest for potential thermoelectric applications. However, YbMg2Sb2 is seldom studied due to the very low electrical conductivity resulting from the large difference in the electronegativity between Mg ...
Zongwei Zhang, Xinyu Wang, Yijie Liu, Chen Chen, Honghao Yao, Li Yin, Xiaofang Li, Shan Li, Fan Zhang, Fengxian Bai, Jiehe Sui, Bo Yu, Feng Cao, Xingjun Liu, Jun Mao, Guoqiang Xie, Qian Zhang   +16 more
doaj   +1 more source

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

Advanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai, Xiaoyu Huo, Xin Long, Enkang Fu, Xusong Gong, Lei Wei, Liang An   +6 more
wiley   +1 more source