Results 61 to 70 of about 484 (218)

X-ray source improvements for EXAFS measurement on SGIII prototype facility

AIP Advances, 2020
A proper x-ray source is crucial to extended x-ray absorption fine structure (EXAFS) measurement as parameter diagnosis for compressed materials on large laser facilities.
Yun Hu, Shaoen Jiang, Jiyan Zhang, Quanxi Xue, Zhebin Wang, Qing Ye   +5 more
doaj   +1 more source

Stage‐Adaptive Janus Microneedle System for Redox‐Immune Regulation and Mitochondrial Protection in Infected Diabetic Wound Healing

Advanced Science, EarlyView.
ABSTRACT Infected diabetic wounds are sustained by a vicious cycle of hyperglycemia‐driven bacterial infection, persistent oxidative stress, and excessive inflammation, which collectively disrupt the ordered progression of tissue repair. Here, we engineered a stage‐adaptive Janus microneedle patch (MN‐FeSAC‐PPE) to enable a staged therapeutic process ...
Mengting Yin, Yu Zhang, Xinyu Qu, Jiayi Liu, Zhongyi Sun, Haibo Liu, Ziyan Chen, Jing Ru, Jingwen Han, Bingqiang Lu, Yan Lu, Yan Wang, Xinyu Zhao, Feng Chen   +13 more
wiley   +1 more source

Trace Ru‐Doped PtCuRu@PtRu Core‐Shell Electrocatalyst for CO‐Resilient Methanol Oxidation

Advanced Science, EarlyView.
We engineered a trace Ru‐doped PtCuRu@PtRu core‐shell nanostructure. This design exploits lattice mismatch‐induced compressive strain between the PtCuRu ternary core and trace Ru‐doped Pt‐rich shell, systematically downshifting the Pt d‐band center to weaken *CO adsorption energetics.
Tianrui Xue, Shiyue Xing, Zhongliang Liu, Yiting Song, Jianyi Zhang, Miaomiao Liu, Huihui Li, Chunzhong Li   +7 more
wiley   +1 more source

An EXAFS spectroscopic study of Europium (III) complexation with dafone

Materials Research Express, 2020
An extended x-ray absorption fine structure (EXAFS) for L _III Eu crystal edge at 6977 eV energy was studied on an original complex based on europium. The ligand was coordinated entirely with respect to europium atom for [Eu(dafone) _2 Cl _2 .(H _2 O) _2
Abdolhamed Shahedi, Javad Rahighi, Mohammad Agha Bolorizadeh   +2 more
doaj   +1 more source

Oxygen Vacancy‐Enriched Platinum Single‐Atom Nanozyme Wrapped in Nanoislands: Unlocking Catalytic Activity and Reprogramming Redox Microenvironment for Osteonecrosis Repair

Advanced Science, EarlyView.
CeO2‐x/Pt single‐atom nano‐island is constructed via low‐temperature reduction, featuring abundant oxygen vacancies and an island–sea structure. It delivers outstanding multi‐enzyme‐mimetic activity and ROS‐scavenging efficiency. Density functional theory reveals optimized electronic structures and reaction pathways.
Yang Zhu, Zehui Lv, Xuejie Cai, Penghui Wei, Dengliang Wang, Zhao Wang, Ruoying Wang, Yingjie Wang, Xingdong Yang, Yixin Bian, Jiawei Xu, Xisheng Weng, Liangfeng Wei   +12 more
wiley   +1 more source

EXAFS Structural Determination of the Pt2(P2O5H2)44– Anion in Solution

CHIMIA, 2008
We present the first structural determination of the Pt2(P2O5H2)44– anion in solution by analyzing the extended X-ray absorption fine structure (EXAFS) spectrum of the Pt LIII edge. The data could be fit with a simple model involving single and
Renske M. van der Veen, Christopher J. Milne, Van-Thai Pham, Amal El Nahhas, Julia A. Weinstein, Jonathan Best, Camelia N. Borca, Christian Bressler, Majed Chergui   +8 more
doaj   +1 more source

Tailored D‐π Conjugation Boosts Piezocatalytic CO2 Reduction in a Platinum(II)‐Acetylide Framework

Advanced Science, EarlyView.
The highly conjugated metalII‐acetylide framework demonstrates efficient ultrasound‐driven conversion of CO2 to CO. The piezoelectric field generated by ultrasound facilitates electron transfer from the tetraphenylene π‐column to the MII‐bis(acetylide) moiety, enabling CO2 activation. Compared to PdII‐ and NiII‐based analogues, the stronger d–π orbital
Mude Zhu, Yingtang Zhou, Kai Wang, Xiaoyun Fan, Yang Ding, Wai‐Yeung Wong, Linli Xu   +6 more
wiley   +1 more source

Biogenic non-crystalline U(IV) revealed as major component in uranium ore deposits

Nature Communications, 2017
Crystalline uraninite is believed to be the dominant form in uranium deposits. Here, the authors find that non-crystalline U(IV) generated through biologically mediated U(VI) reduction is the predominant U(IV)species in ore deposits, implying that ...
Amrita Bhattacharyya, Kate M. Campbell, Shelly D. Kelly, Yvonne Roebbert, Stefan Weyer, Rizlan Bernier-Latmani, Thomas Borch   +6 more
doaj   +1 more source

Laboratory EXAFS in a dispersive mode

Journal of Applied Crystallography, 1988
A laboratory dispersive mode spectrometer, capable of operating in either the analysing crystal transmission mode or a reflection mode, is described. Extended X-ray absorption fine structure (EXAFS) spectra of Re and ReO2, obtained in the transmission mode, compare favourably with those from a scanning spectrometer at a synchrotron source.
BUSCHERT R, GIARDINA MD, MERLINI A, BALERNA A, MOBILIO, Settimio   +4 more
openaire   +3 more sources

Rare‐Earth Mediated Engineering in ZnSe@ZnS:Eu3+ to Simultaneously Achieve Structural Modulation and Atomic Eu Doping Sites for X‐Ray Imaging

Advanced Science, EarlyView.
A dual hard‐base anchoring strategy was developed to synthesize ZnSe@ZnS:Eu3+ quantum dots, leveraging fluoride‐oleylamine interactions to create surface atomic Eu doping sites. By precisely tuning temperature, Eu3+ concentration, and fluoride levels, we obtain morphologies ranging from tip growth to coupled flower‐like structures.
Jicun Ma, Chenhao Yang, Jiada Fan, Haorong Jiao, Jiawang Liu, Jialiang Xu, Hui Cai, Yinghui Wang, Boyuan Shen, Jiabin Cui   +9 more
wiley   +1 more source