J
Judy S. Kim
Researcher at University of Oxford
Publications - 55
Citations - 1832
Judy S. Kim is an academic researcher from University of Oxford. The author has contributed to research in topics: Transmission electron microscopy & High-resolution transmission electron microscopy. The author has an hindex of 17, co-authored 50 publications receiving 1480 citations. Previous affiliations of Judy S. Kim include University of California & University of California, Davis.
Papers
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Journal ArticleDOI
Imaging of Transient Structures Using Nanosecond in Situ TEM
Judy S. Kim,Judy S. Kim,Thomas LaGrange,Bryan W. Reed,Mitra L. Taheri,Michael R. Armstrong,Wayne E. King,Nigel D. Browning,Nigel D. Browning,Geoffrey H. Campbell +9 more
TL;DR: Time-resolved images and diffraction show a transient cellular morphology in a dynamically mixing, self-propagating reaction front, revealing brief phase separation during cooling, and thus provide insights into the mechanisms driving the self- Propagating high-temperature synthesis.
Journal ArticleDOI
Dynamics of single Fe atoms in graphene vacancies.
Alex W. Robertson,B. Montanari,Kuang He,Judy S. Kim,Christopher S. Allen,Yimin A. Wu,Jaco Olivier,J.H. Neethling,Nicholas M. Harrison,Angus I. Kirkland,Jamie H. Warner +10 more
TL;DR: It is found that the incorporation of a dopant atom results in pronounced displacements of the surrounding carbon atoms of up to 0.5 Å, which is in good agreement with density functional theory calculations.
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Atomic-scale microstructure of metal halide perovskite.
Mathias Uller Rothmann,Judy S. Kim,Judy S. Kim,Juliane Borchert,Kilian Lohmann,Colum M. O'Leary,Alex Sheader,Laura Clark,Henry J. Snaith,Michael B. Johnston,Peter D. Nellist,Laura M. Herz +11 more
TL;DR: An atomic crystallographic structure of formamidinium lead triiodide (FAPbI3) polycrystalline thin films obtained by low-electron-dose scanning transmission electron microscopy with advanced image processing is presented and explains why the perovskite structure can sustain significant deviations from stoichiometry and recovers remarkably well from damage.
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Single-shot dynamic transmission electron microscopy
Thomas LaGrange,Michael R. Armstrong,K. Boyden,Curtis G. Brown,Geoffrey H. Campbell,Jeffrey D. Colvin,W.J. DeHope,Alan M. Frank,David Gibson,Fred Hartemann,Judy S. Kim,Wayne E. King,B. J. Pyke,Bryan W. Reed,M. D. Shirk,R. M. Shuttlesworth,Brent C. Stuart,Ben Torralva,Nigel D. Browning,Nigel D. Browning +19 more
TL;DR: The DTEM as mentioned in this paper is a single-shot in situ transmission electron microscope (TEM) modified to drive material processes with a nanosecond laser, "pump" pulse and measure it shortly afterward with a 30-ns-long probe pulse of ∼107 electrons.
Journal ArticleDOI
Influence of Shell Thickness and Surface Passivation on PbS/CdS Core/Shell Colloidal Quantum Dot Solar Cells
Darren C. J. Neo,Cheng Cheng,Samuel D. Stranks,Simon M. Fairclough,Judy S. Kim,Angus I. Kirkland,Jason M. Smith,Henry J. Snaith,Hazel E. Assender,Andrew A. R. Watt +9 more
TL;DR: In this paper, the authors showed that core/shell colloidal quantum dots can replace their unshelled counterparts with a similar band gap as the active layer in a solar cell device, leading to an improvement in open circuit voltage from 0.42 to 0.66 V.