S
Simon A. T. Redfern
Researcher at Nanyang Technological University
Publications - 294
Citations - 13956
Simon A. T. Redfern is an academic researcher from Nanyang Technological University. The author has contributed to research in topics: Phase transition & Neutron diffraction. The author has an hindex of 57, co-authored 287 publications receiving 12054 citations. Previous affiliations of Simon A. T. Redfern include University of Manchester & University of Oxford.
Papers
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Journal ArticleDOI
Unit Cell Refinement from Powder Diffraction Data: The Use of Regression Diagnostics
Tim Holland,Simon A. T. Redfern +1 more
TL;DR: The use of regression diagnostics combined with nonlinear least-squares to refine cell parameters from powder diffraction data, presenting a method which minimizes residuals in the experimentallydetermined quantity.
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β phase and γ-β metal-insulator transition in multiferroic BiFeO3
Ratnakar Palai,Ram S. Katiyar,Hans Schmid,Paul Tissot,Stewart J. Clark,John Robertson,Simon A. T. Redfern,Gustau Catalan,James F. Scott +8 more
TL;DR: In this paper, the authors report on extensive experimental studies on thin film, single crystal, and ceramics of multiferroic bismuth ferrite BiFeO3 using differential thermal analysis, high-temperature polarized light microscopy, hightemperature x-ray diffraction, dc conductivity, optical absorption and reflectivity, and domain imaging.
Journal ArticleDOI
βphase andγ−βmetal-insulator transition in multiferroicBiFeO3
Ratnakar Palai,R. S. Katiyar,Hans Schmid,Paul Tissot,Stewart J. Clark,John Robertson,Simon A. T. Redfern,Gustau Catalan,James F. Scott +8 more
TL;DR: In this article, the authors report on extensive experimental studies on thin film, single crystal, and ceramics of multiferroic bismuth ferrite and show that epitaxial (001) thin films of these materials are clearly monoclinic at room temperature, in agreement with recent synchrotron studies.
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Carbon-Quantum-Dots-Loaded Ruthenium Nanoparticles as an Efficient Electrocatalyst for Hydrogen Production in Alkaline Media
Weidong Li,Yuan Liu,Min Wu,Xiaolei Feng,Simon A. T. Redfern,Yuan Shang,Xue Yong,Tanglue Feng,Kaifeng Wu,Zhongyi Liu,Baojun Li,Zhimin Chen,John S. Tse,Siyu Lu,Siyu Lu,Bai Yang +15 more
TL;DR: Electrochemical tests reveal that the as-formed Ru@CQDs exhibits excellent catalytic behavior with an onset overpotential of 0 mV, a Tafel slope of 47 mV decade-1, and good durability, which is superior to the current commercial Pt/C and most noble metals, non-noble metals, and nonmetallic catalysts under basic conditions.
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Polymer-Passivated Inorganic Cesium Lead Mixed-Halide Perovskites for Stable and Efficient Solar Cells with High Open-Circuit Voltage over 1.3 V.
Qingsen Zeng,Xiaoyu Zhang,Xiaolei Feng,Siyu Lu,Zhaolai Chen,Xue Yong,Simon A. T. Redfern,Haotong Wei,Hai-Yu Wang,Huaizhong Shen,Wei Zhang,Weitao Zheng,Hao Zhang,John S. Tse,Bai Yang +14 more
TL;DR: It is demonstrated that polythiophene, deposited on the top of CsPbI2 Br, can significantly reduce electron-hole recombination within the perovskite, which is due to the electronic passivation of surface defect states, and the interfacial properties are improved by a simple annealing process.