Results 81 to 90 of about 54,913 (297)

Halide‐Exchange Arrest Enables Reabsorption‐Free CsPbCl3/CsPbI3 Perovskite Core/Shell Nanocrystals

Advanced Science, EarlyView.
Achieving large Stokes shifts in perovskite nanocrystals is challenging due to halide mobility that disrupts stable core–shell structures. Using CdCl2 passivation, this work stabilizes CsPbCl3/CsPbI3 heterostructures, yielding a ≈1.2 eV Stokes shift, high quantum yield, and fast exciton transfer, enabling reabsorption‐free emitters for advanced ...
Hiba H. Karakkal, Saptarshi Chakraborty, Matteo L. Zaffalon, Jordi Llusar, Shehla Gul, Andrea Fratelli, Leonardo Poletti, Laura Lazzarini, Daniela Erminia Manno, Francesco Meinardi, Francesco Carulli, Francesca Rossi, Ivan Infante, Sergio Brovelli   +13 more
wiley   +1 more source

Proposed method for laser spectroscopy of pionic helium atoms to determine the charged-pion mass

, 2014
Metastable pionic helium ($\pi{\rm He}^+$) is a three-body atom composed of a helium nucleus, an electron occupying the $1s$ ground state, and a negatively charged pion $\pi^-$ in a Rydberg state with principal- and orbital angular momentum quantum ...
Hori, Masaki, Korobov, Vladimir I., Sótér, Anna   +2 more
core   +1 more source

Photocatalytic Asymmetric C‐C Coupling for CO2 Reduction on Cu‐Zn Bimetallic Catalysts with Dipole‐Limiting Effects

Advanced Science, EarlyView.
Asymmetric Cu–Zn dual sites on EDTA‐grafted Ti‐MOF amplify the dipole‐limiting domain field (DLDF), facilitating C–C coupling. This strategy yields an exceptional C2H4 production rate of 308.72 µmol g−1 h−1 with 98.4% electron selectivity in photocatalytic CO2 reduction, highlighting the potential of asymmetric site engineering and local field ...
Peidong Ma, Ying Yu, Fan Wen, Hongyan Guo, Boyu Li, GuoZhi Deng, Xianyang Shi, Daochuan Jiang, Ruting Huang   +8 more
wiley   +1 more source

Combining ToF‐SIMS and Multivariate Analysis to Resolve Active Sites on Ni‐Based HER Catalysts

Angewandte Chemie, EarlyView.
Time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS), combined with principal component analysis (PCA) and multivariate curve resolution (MCR), disentangles ultrathin mixtures of Ni, NiO, and Ni(OH)2 on model Ni electrodes. By revealing a hydroxide‐specific ion marker linked to hydrogen evolution reaction (HER) activity, the method offers a new ...
Matjaž Finšgar, Katja Andrina Varda, Dzevad K. Kozlica, Matej Huš, Milena Martins, Dušan Strmčnik   +5 more
wiley   +2 more sources

Tribological Behaviour of Bonded Solid Lubricant Film in Air and in Vacuum

Communications, 2000
The friction tests of inorganic bonded composite solid lubricant films (WS2, graphite, BN) were performed in laboratory air and in 10-4 Pa vacuum. The wear traces and transfer films were characterized by scanning electron microscopy (SEM), and Auger ...
Changsheng Li, Yoshinori Takeichi, Shinya Shimizu, Masao Uemura, Marian Dzimko, Yuko Tsuya   +5 more
doaj   +1 more source

Compositional analysis of silicon [PDF]

The use of surface analysis methods in the detection and evaluation of elemental and impurity species in Si is presented. Examples are provided from polycrystalline Si and high-efficiency MINP cells.
Kazmerski, L. L.
core   +1 more source

Site-specific Forest-assembly of Single-Wall Carbon Nanotubes on Electron-beam Patterned SiOx/Si Substrates

, 2011
Based on electron-beam direct writing on the SiOx/Si substrates, favorable absorption sites for ferric cations (Fe3+ ions) were created on the surface oxide layer.
Ago, Bachtold, Bahr, Baughman, Bockrath, Bonnell, Brown, Bryan D. Huey, Cai, Chattopadhyay, Chattopadhyay, Chattopadhyay, Chattopadhyay, Collins, Diao, Dresselhaus, Fotios Papadimitrakopoulos, Galeska, Gardner Catherine, Geyer, Haoyan Wei, Harnett, Harris L. Marcus, Huang, Iwasaki, Jeong, Kern, Kong, Lee, Lefebvre, Li, Li, Liu, Liu, Liu, Mazen, Nan, O'Connor, Odom, Oh, Okorn-Schmidt, Pantarotto, Pantarotto, Rao, Sang Nyon Kim, Sejong Kim, Smith, Sugie, Tans, Wager, Wang, Wei, Wei, Wei, Wildoer, Wu, Yao, Yu, Yu, Zhuravlev   +59 more
core   +1 more source

In Situ Synthesis of a Tumor Microenvironment‐Activated Radiosensitizing Cu2‐xS/LDH Probe for Photoacoustic Imaging‐Guided Radiotherapy

Advanced Science, EarlyView.
We reported a new kind of organic‐inorganic composite nanomaterial with excellent PA imaging performance after the in situ activation by hydrogen sulfide in colorectal cancer tissues, which was used for precise radiotherapy of colorectal cancer. It shows a great application potential for early diagnosis and treatment of tumor.
Kang Zhu, Qiaoqiao Wei, Ying Wu, Qingqing Li, Luntao Liu, Chunxiang Mo, Chuqiao Liu, Lichao Su, Jibin Song   +8 more
wiley   +1 more source

M–O–C Catalysts: Copper Single Atoms Supported on Oxocarbon Covalent Networks as Electrocatalysts for Glycerol Oxidation to Formic Acid

Angewandte Chemie, EarlyView.
We introduce a new class of single‐atom electrocatalysts based on oxygen‐coordinated metal sites embedded in oxocarbon networks (M–O–C), alternative to traditional M–N–C materials. A Cu–O–C catalyst derived from oxocarbon precursors exhibits highly dispersed Cu single atoms and delivers faster glycerol oxidation kinetics and higher formate selectivity ...
Xinyue Zheng, Teodor Jianu, Yizhou Dai, Anastaios Orestis Grammennos, Nadezda V. Tarakina, Fernando Igoa Saldaña, Jiatu Liu, Zhihong Tian, Markus Antonietti, Mateusz Odziomek   +9 more
wiley   +2 more sources

Electrochemical Nitrate Reduction Reaction to Ammonia at Industrial‐Level Current Densities

Advanced Science, EarlyView.
This review starts from the mechanism and theoretical basis of electrochemical nitrate reduction reaction (NO3−RR), and systematically summarizes and discusses the design strategies of industrial‐level current density catalysts. In addition, the progress of industrial‐level NO3−RR‐based electrolyzers, including flow reactor and membrane electrode ...
Zhijie Cui, Honghai Wang, Chunli Li, Wenchao Peng, Jiapeng Liu   +4 more
wiley   +1 more source