Journal of Synchrotron Radiation最新文献_第8页

A miniature X-ray diffraction setup on ID20 at the European Synchrotron Radiation Facility. 欧洲同步辐射设施 ID20 上的微型 X 射线衍射装置。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-11-01 Epub Date: 2024-10-25 DOI: 10.1107/S1600577524009147

Christoph J Sahle, Marta Majkut, Kari O Ruotsalainen, Florent Gerbon, Noora Suomalainen, Marie Claire Lagier, Blanka Detlefs, Laurent Claustre, Alessandro Mirone, Alessandro Longo

引用次数: 0

VMXm - A sub-micron focus macromolecular crystallography beamline at Diamond Light Source. VMXm - 钻石光源的亚微米聚焦大分子晶体学光束线。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-11-01 Epub Date: 2024-10-30 DOI: 10.1107/S1600577524009160

Anna J Warren, Jose Trincao, Adam D Crawshaw, Emma V Beale, Graham Duller, Andrew Stallwood, Mark Lunnon, Richard Littlewood, Adam Prescott, Andrew Foster, Neil Smith, Guenther Rehm, Sandira Gayadeen, Christopher Bloomer, Lucia Alianelli, David Laundy, John Sutter, Leo Cahill, Gwyndaf Evans

{"title":"VMXm - A sub-micron focus macromolecular crystallography beamline at Diamond Light Source.","authors":"Anna J Warren, Jose Trincao, Adam D Crawshaw, Emma V Beale, Graham Duller, Andrew Stallwood, Mark Lunnon, Richard Littlewood, Adam Prescott, Andrew Foster, Neil Smith, Guenther Rehm, Sandira Gayadeen, Christopher Bloomer, Lucia Alianelli, David Laundy, John Sutter, Leo Cahill, Gwyndaf Evans","doi":"10.1107/S1600577524009160","DOIUrl":"10.1107/S1600577524009160","url":null,"abstract":"VMXm joins the suite of operational macromolecular crystallography beamlines at Diamond Light Source. It has been designed to optimize rotation data collections from protein crystals less than 10 µm and down to below 1 µm in size. The beamline has a fully focused beam of 0.3 × 2.3 µm (vertical × horizontal) with a tuneable energy range (6-28 keV) and high flux (1.6 × 1012 photons s-1 at 12.5 keV). The crystals are housed within a vacuum chamber to minimize background scatter from air. Crystals are plunge-cooled on cryo-electron microscopy grids, allowing much of the liquid surrounding the crystals to be removed. These factors improve the signal-to-noise during data collection and the lifetime of the microcrystals can be prolonged by exploiting photoelectron escape. A novel in vacuo sample environment has been designed which also houses a scanning electron microscope to aid with sample visualization. This combination of features at VMXm allows measurements at the physical limits of X-ray crystallography on biomacromolecules to be explored and exploited.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"1593-1608"},"PeriodicalIF":2.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11542661/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142548457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upgraded front ends for SLS 2.0 with next-generation high-power diaphragms and slits. 用于 SLS 2.0 的升级版前端，配备新一代大功率隔膜和狭缝。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-11-01 Epub Date: 2024-10-22 DOI: 10.1107/S160057752400907X

David Marco Just, Marcel Brüstle, Simon Guntli, Johannes Mück, Claude Pradervand

引用次数: 0

Coprecipitation of Ce(III) oxide with UO₂. 氧化铈（III）与二氧化铀的共沉淀。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-11-01 Epub Date: 2024-09-30 DOI: 10.1107/S1600577524008336

M Saleh, M Hedberg, P L Tam, K Spahiu, I Persson, C Ekberg

{"title":"Coprecipitation of Ce(III) oxide with UO2.","authors":"M Saleh, M Hedberg, P L Tam, K Spahiu, I Persson, C Ekberg","doi":"10.1107/S1600577524008336","DOIUrl":"10.1107/S1600577524008336","url":null,"abstract":"The neutralization of acidic solutions containing U (IV) and Ce (III) at room temperature in glove box atmosphere and in the presence of dithionite results in coprecipitation of these elements as amorphous solid solutions CexU1-xO2±y. The solubilities of the precipitates with different mole fractions (x) of Ce(OH)3 (x = 0.01 or 0.1) were determined in 1 M NaClO4 solutions between pH 2.2 and 12.8 under reducing conditions. The solids were investigated by a variety of methods (chemical analysis, SEM-EDX, XRD, XPS, XAS) to determine the nature of the solid solutions formed, their composition and the valence state of Ce and U. X-ray photoelectron spectroscopy confirmed the oxidation states of the solids both before and after the equilibration as Ce (III) and U (IV). The amorphous coprecipitates reached equilibrium relatively fast (∼1 week). The release of Ce from the coprecipitates was totally dominated by the release of uranium over the whole pH range. The Ce concentrations decrease slightly with the decrease of Ce content in the solid, suggesting that CexU1-xO2±y solids behave thermodynamically as solid solutions. The concentrations of U in equilibrium with the coprecipitate were in excellent agreement with the solubility of UO2(s) under reducing conditions reported in the literature. The conditional solubility product of Ce(OH)3 from the coprecipitate was several orders of magnitude (∼4 in the near neutral pH range and ∼18 in the acidic range) lower than that of pure Ce(OH)3(s). The activities and activity coefficients of Ce(OH)3(s) in the coprecipitate were also estimated. Activity coefficients are much less than 1, indicating that the mixing of Ce(OH)3 with UO2 is highly favorable.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"1489-1504"},"PeriodicalIF":2.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11542660/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142356516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of hard X-ray photoelectron spectroscopy in liquid cells using optimized microfabricated silicon nitride membranes. 利用优化的微加工氮化硅膜在液体电池中开发硬 X 射线光电子能谱。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-11-01 Epub Date: 2024-10-15 DOI: 10.1107/S1600577524008865

F Capone, O Muntada, J C Ramírez, M J Esplandiu, R Dedryvère, A Grimaud, B Lassalle-Kaiser, D Céolin, F Pérez-Murano, J P Rueff, Jordi Fraxedas

{"title":"Development of hard X-ray photoelectron spectroscopy in liquid cells using optimized microfabricated silicon nitride membranes.","authors":"F Capone, O Muntada, J C Ramírez, M J Esplandiu, R Dedryvère, A Grimaud, B Lassalle-Kaiser, D Céolin, F Pérez-Murano, J P Rueff, Jordi Fraxedas","doi":"10.1107/S1600577524008865","DOIUrl":"10.1107/S1600577524008865","url":null,"abstract":"We present first hard X-ray photoelectron spectroscopy (HAXPES) results of aqueous salt solutions and dispersions of gold nanoparticles in liquid cells equipped with specially designed microfabricated thin silicon nitride membranes, with thickness in the 15-25 nm range, mounted in a high-vacuum-compatible environment. The experiments have been performed at the HAXPES endstation of the GALAXIES beamline at the SOLEIL synchrotron radiation facility. The low-stress membranes are fabricated from 100 mm silicon wafers using standard lithography techniques. Platinum alignment marks are added to the chips hosting the membranes to facilitate the positioning of the X-ray beam on the membrane by detecting the corresponding photoemission lines. Two types of liquid cells have been used, a static one built on an Omicron-type sample holder with the liquid confined in the cell container, and a circulating liquid cell, in which the liquid can flow in order to mitigate the effects due to beam damage. We demonstrate that the membranes are mechanically robust and able to withstand 1 bar pressure difference between the liquid inside the cell and vacuum, and the intense synchrotron radiation beam during data acquisition. This opens up new opportunities for spectroscopic studies of liquids.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"1505-1513"},"PeriodicalIF":2.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11542648/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142478288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Foreword to the special virtual issue on X-ray spectroscopy to understand functional materials: instrumentation, applications, data analysis. X 射线光谱了解功能材料：仪器、应用和数据分析》虚拟特刊前言。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-11-01 Epub Date: 2024-10-21 DOI: 10.1107/S1600577524008695

Elisa Borfecchia, Kirill A Lomachenko, Kristina Kvashnina

引用次数: 0

StreamSAXS: a Python-based workflow platform for processing streaming SAXS/WAXS data. StreamSAXS：基于 Python 的工作流平台，用于处理流 SAXS/WAXS 数据。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-09-01 Epub Date: 2024-07-15 DOI: 10.1107/S1600577524005149

Jiayi Wang, Zheng Dong, Yi Zhang, Wenqiang Hua, Zudeng Wang, Huilong Guo, Yiming Yang, Xiaoxue Bi

引用次数: 0

Spexwavepy: an open-source Python package for X-ray wavefront sensing using speckle-based techniques. Spexwavepy：使用基于斑点的技术进行 X 射线波前传感的开源 Python 软件包。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-09-01 Epub Date: 2024-07-30 DOI: 10.1107/S1600577524005861

Lingfei Hu, Hongchang Wang, Kawal Sawhney

引用次数: 0

Effectiveness of ab initio molecular dynamics in simulating EXAFS spectra from layered systems. 模拟层状系统 EXAFS 光谱的 ab initio 分子动力学的有效性。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-09-01 Epub Date: 2024-07-23 DOI: 10.1107/S1600577524005484

F d'Acapito, M A Rehman

引用次数: 0

In situ photodeposition of ultra-small palladium particles on TiO₂. 在二氧化钛上原位光沉积超小型钯粒子。

IF 2.5 3区物理与天体物理

Journal of Synchrotron Radiation Pub Date : 2024-09-01 Epub Date: 2024-07-15 DOI: 10.1107/S1600577524004788

Elizaveta Kozyr, Sara Martí-Sánchez, Alina Skorynina, Jordi Arbiol, Carlos Escudero, Lorenzo Mino, Aram Bugaev

{"title":"In situ photodeposition of ultra-small palladium particles on TiO2.","authors":"Elizaveta Kozyr, Sara Martí-Sánchez, Alina Skorynina, Jordi Arbiol, Carlos Escudero, Lorenzo Mino, Aram Bugaev","doi":"10.1107/S1600577524004788","DOIUrl":"10.1107/S1600577524004788","url":null,"abstract":"In situ and operando investigation of photocatalysts plays a fundamental role in understanding the processes of active phase formation and the mechanisms of catalytic reactions, which is crucial for the rational design of more efficient materials. Using a custom-made operando photocatalytic cell, an in situ procedure to follow the formation steps of Pd/TiO2 photocatalyst by synchrotron-based X-ray absorption spectroscopy (XAS) is proposed. The procedure resulted in the formation of ∼1 nm Pd particles with a much narrower size distribution and homogeneous spreading over TiO2 support compared with the samples generated in a conventional batch reactor. The combination of in situ XAS spectroscopy with high-angle annular dark-field scanning transmission electron microscopy demonstrated the formation of single-atom Pd(0) sites on TiO2 as the initial step of the photodeposition process. Palladium hydride particles were observed for all investigated samples upon exposure to formic acid solutions.","PeriodicalId":48729,"journal":{"name":"Journal of Synchrotron Radiation","volume":" ","pages":"1071-1077"},"PeriodicalIF":2.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11371036/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141617450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0