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1,908 results on '"Zou, Xiaodong"'

3. Tautomerism unveils a self-inhibition mechanism of crystallization

Author

Tang, Weiwei, Yang, Taimin, Morales-Rivera, Cristian A, Geng, Xi, Srirambhatla, Vijay K, Kang, Xiang, Chauhan, Vraj P, Hong, Sungil, Tu, Qing, Florence, Alastair J, Mo, Huaping, Calderon, Hector A, Kisielowski, Christian, Hernandez, Francisco C Robles, Zou, Xiaodong, Mpourmpakis, Giannis, and Rimer, Jeffrey D

Subjects
Biochemistry and Cell Biology, Chemical Sciences, Biological Sciences
Abstract

Modifiers are commonly used in natural, biological, and synthetic crystallization to tailor the growth of diverse materials. Here, we identify tautomers as a new class of modifiers where the dynamic interconversion between solute and its corresponding tautomer(s) produces native crystal growth inhibitors. The macroscopic and microscopic effects imposed by inhibitor-crystal interactions reveal dual mechanisms of inhibition where tautomer occlusion within crystals that leads to natural bending, tunes elastic modulus, and selectively alters the rate of crystal dissolution. Our study focuses on ammonium urate crystallization and shows that the keto-enol form of urate, which exists as a minor tautomer, is a potent inhibitor that nearly suppresses crystal growth at select solution alkalinity and supersaturation. The generalizability of this phenomenon is demonstrated for two additional tautomers with relevance to biological systems and pharmaceuticals. These findings offer potential routes in crystal engineering to strategically control the mechanical or physicochemical properties of tautomeric materials.

Published
2023

7. Advanced materials provide solutions towards a sustainable world

Author

Hultman, Lars, Mazur, Sara, Ankarcrona, Caroline, Palmqvist, Anders, Abrahamsson, Maria, Antti, Marta-Lena, Baltzar, Malin, Bergström, Lennart, de Laval, Pontus, Edman, Ludvig, Erhart, Paul, Kloo, Lars, Lundberg, Mats W., Mikkelsen, Anders, Moons, Ellen, Persson, Cecilia, Rensmo, Håkan, Rosén, Johanna, Rudén, Christina, Selleby, Malin, Sundgren, Jan-Eric, Dick Thelander, Kimberly, Tybrandt, Klas, Weihed, Pär, Zou, Xiaodong, Åstrand, Maria, Björkman, Charlotte Platzer, Schneider, Jochen M., Eriksson, Olle, and Berggren, Magnus

Published
2024
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9. Improving data quality for 3D electron diffraction (3D ED) by Gatan Image Filter and a new crystal tracking method

Author

Yang, Taimin, Xu, Hongyi, and Zou, Xiaodong

Subjects
Physics - Chemical Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

3D ED is an effective technique to determine the structures of submicron- or nano-sized crystals. In this paper, we implemented energy-filtered 3D ED using a Gatan Energy Filter (GIF) in both selected area electron diffraction mode and micro/nanoprobe mode. We explained the setup in detail, which improves the accessibility of energy-filtered 3D ED experiments as more electron microscopes are equipped with a GIF than an in-column filter. We also proposed a crystal tracking method in STEM mode using live HAADF image stream. This method enables us to collect energy-filtered 3D ED datasets in STEM mode with a larger tilt range without foregoing any frames. In order to compare the differences between energy-filtered 3D ED and normal 3D ED data, three crystalline samples have been studied in detail. We observed that the final R1 will improve 20% to 30% for energy-filtered datasets compared with unfiltered datasets and the structure became more reasonable. We also discussed the possible reasons that lead to the improvement.

Published
2021
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15. InsteaDMatic: Towards cross-platform automated continuous rotation electron diffraction

Author

Roslova, Maria, Smeets, Stef, Wang, Bin, Thersleff, Thomas, Xu, Hongyi, and Zou, Xiaodong

Subjects
Condensed Matter - Materials Science
Abstract

A DigitalMicrograph script InsteaDMatic has been developed to facilitate rapid automated continuous rotation electron diffraction (cRED) data acquisition. The script coordinates microscope functions, such as stage rotation, camera functions relevant for data collection, and stores the experiment metadata. The script is compatible with any microscope that can be controlled by DigitalMicrograph and has been tested on both JEOL and Thermo Fisher Scientific microscopes. A proof-of-concept has been performed through employing InsteaDMatic for data collection and structure determination of a ZSM-5 zeolite. The influence of illumination settings and electron dose rate on the quality of diffraction data, unit cell determination and structure solution has been investigated in order to optimize the data acquisition procedure.

Published
2019

32. Understanding Element Transfer Behaviors of CaF2–TiO2 Flux-Cored Wires Under High Heat Input Electro-Gas Welding.

Author

Xie, Xu, Zou, Xiaodong, Zhong, Ming, Basu, Somnath, and Wang, Cong

Subjects
WELDING, SHIPBUILDING, STEEL, WIRE
Abstract

CaF2–TiO2 fluxes are designed and applied into flux-cored wires suitable for high heat input electro-gas welding of EH36 shipbuilding steel. It has been demonstrated that decomposing CO2 and TiO2 caused by arc synergistically contributes O and Ti gains in the weld pool, while more SiO2 and MnO formation at the slag-metal interface induces the loss of Si (from − 0.012 to − 0.046 wt pct) and Mn (from − 0.138 to − 0.404 wt pct) with increasing TiO2 addition. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Introduction: How Can Unearthed Documents Push Forward the Study of Early Chinese Philosophy?

Author

Zou, Xiaodong

Subjects
CONDUCT of life, PLACE (Philosophy), CARDINAL virtues
Abstract

The article discusses the significance of unearthed documents in advancing the study of early Chinese philosophy. These documents, which were previously unknown or thought to be lost, supplement our understanding of the evolution of Chinese philosophy and allow us to rewrite its history. The interpretation of these documents is crucial in reshaping our knowledge and confirming or contradicting existing beliefs. The article also highlights specific examples of unearthed texts and their philosophical content, such as the role of yi in early Daoist thought and the influence of Huang-Lao thought on governance. Additionally, it explores the physical characteristics of these documents and how they affect writing styles. The article concludes by emphasizing the need for further research on the incorporation of unearthed documents into the broader understanding of early Chinese thought. [Extracted from the article]

Published
2024
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40. Finned zeolite catalysts

Author

Dai, Heng, Shen, Yufeng, Yang, Taimin, Lee, Choongsze, Fu, Donglong, Agarwal, Ankur, Le, Thuy Thanh, Tsapatsis, Michael, Palmer, Jeremy C., Weckhuysen, Bert M., Dauenhauer, Paul J., Zou, Xiaodong, and Rimer, Jeffrey D.

Published
2020
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