Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Andrew Ulvestad"'
Autor:
Ke Yuan, Sang Soo Lee, Wonsuk Cha, Andrew Ulvestad, Hyunjung Kim, Bektur Abdilla, Neil C. Sturchio, Paul Fenter
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019)
Oxidation of magnetite has broad implications in geochemistry and environmental science, but its reaction mechanisms are not fully understood yet. Here the authors use Bragg coherent diffractive imaging to show oxidative dissolution of magnetite indu
Externí odkaz:
https://doaj.org/article/ecf9dbe06a64452a8205d4a7abf9bc72
Autor:
Jiecheng Diao, Mathew Cherukara, Ross Harder, Xiaojing Huang, Fucai Zhang, Bo Chen, Andrew Ulvestad, Sanghoon Song, Diling Zhu, David Keen, Ian Robinson
Publikováno v:
Crystals, Vol 10, Iss 5, p 365 (2020)
Coherent X-ray diffraction patterns were recorded by using an X-ray free-electron laser to illuminate barium titanate nanocrystals as a function of time delay after laser excitation. Rather than seeing any significant thermal expansion effects, the d
Externí odkaz:
https://doaj.org/article/4c631e118c1e4261985b2db34efb1108
Autor:
Ross Harder, Wonsuk Cha, Hyunjung Kim, Sungwook Choi, Hoydoo You, Tomoya Kawaguchi, Yihua Liu, Myungwoo Chung, Mee Kyung Song, Dongjin Kim, Andrew Ulvestad, Kyuseok Yun, Sung-Won Kim
Publikováno v:
Nano Letters. 20:8541-8548
Fundamental understanding of structural changes during catalytic reactions is crucial to understanding the underlying mechanisms and optimizing efficiencies. Surface energy and related catalytic mechanisms are widely studied. However, the catalyst la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d6f86ec1575f8b0dccdad5cf8158726
https://doi.org/10.1021/acs.nanolett.0c03005
https://doi.org/10.1021/acs.nanolett.0c03005
Autor:
Yong S. Chu, Irene Calvo-Almazán, Hanfei Yan, Eric Colegrove, Xiaojing Huang, Michael Stuckelberger, Andrew Ulvestad, Martin V. Holt, Lincoln J. Lauhon, Mariana I. Bertoni, Siddharth Maddali, Stephan O. Hruszkewycz, Evgeny Nazaretski, Megan O. Hill, Tursun Ablekim
Publikováno v:
IEEE journal of photovoltaics 9(6), 1790-1799 (2019). doi:10.1109/JPHOTOV.2019.2942487
IEEE journal of photovoltaics 9(6), 1790-1799 (2019). doi:10.1109/JPHOTOV.2019.2942487
Strain within grains and at grain boundaries (GBs) in polycrystalline thin-film absorber layers limits the overall performance because of higher defect concen
Strain within grains and at grain boundaries (GBs) in polycrystalline thin-film absorber layers limits the overall performance because of higher defect concen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f00de49ef28177960e9567f29064df38
https://doi.org/10.1109/jphotov.2019.2942487
https://doi.org/10.1109/jphotov.2019.2942487
Autor:
Paul Fenter, Bektur Abdilla, Sang Soo Lee, Neil C. Sturchio, Wonsuk Cha, Hyunjung Kim, Ke Yuan, Andrew Ulvestad
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019)
Nature Communications
Nature Communications
Oxidation of magnetite (Fe3O4) has broad implications in geochemistry, environmental science and materials science. Spatially resolving strain fields and defect evolution during oxidation of magnetite provides further insight into its reaction mechan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d36af06431a500f4eb48ff236915800a
https://doaj.org/article/ecf9dbe06a64452a8205d4a7abf9bc72
https://doaj.org/article/ecf9dbe06a64452a8205d4a7abf9bc72
Autor:
Mathew J. Cherukara, Ross Harder, Sanghoon Song, Bo Chen, Xiaojing Huang, Andrew Ulvestad, David Keen, Fucai Zhang, Jiecheng Diao, Diling Zhu, Ian K. Robinson
Publikováno v:
Crystals
Volume 10
Issue 5
Crystals, Vol 10, Iss 365, p 365 (2020)
Volume 10
Issue 5
Crystals, Vol 10, Iss 365, p 365 (2020)
Coherent X-ray diffraction patterns were recorded by using an X-ray free-electron laser to illuminate barium titanate nanocrystals as a function of time delay after laser excitation. Rather than seeing any significant thermal expansion effects, the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bfc61e69f2fdd06c2904fa4a814e985a
Autor:
Francisco Javier Quintero Cortes, Michael Xu, Matthew G. Boebinger, Matthew T. McDowell, Andrew Ulvestad
Publikováno v:
ACS Energy Letters. 3:349-355
Alloying anode materials offer high capacity for next-generation batteries, but the performance of these materials often decays rapidly with cycling because of volume changes and associated mechanical degradation or fracture. The direct measurement o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63be3974afe3b332c779ee01d3884bbd
https://doi.org/10.1021/acsenergylett.7b01185
https://doi.org/10.1021/acsenergylett.7b01185
Publikováno v:
ACS Nano. 11:10945-10954
Defects such as dislocations and grain boundaries often control the properties of polycrystalline materials. In nanocrystalline materials, investigating this structure-function relationship while preserving the sample remains challenging because of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3f397747b1c578d1874f56f90af5844
https://doi.org/10.1021/acsnano.7b04735
https://doi.org/10.1021/acsnano.7b04735
Publikováno v:
Science. 356:739-742
Watching defects in heated thin films The response of materials to external conditions depends on small-scale features such as defects and grain boundaries. Yau et al. heated gold thin films and used coherent x-ray diffractive imaging to track how th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0cbef22e0ed58bf57a0ba0b61554cea
https://doi.org/10.1126/science.aam6168
https://doi.org/10.1126/science.aam6168
Autor:
Yuzi Liu, G. B. Stephenson, Nenad M. Markovic, Ross Harder, J. Maser, Stephan O. Hruszkewycz, Evan Maxey, Hoydoo You, P. P. Lopes, Wonsuk Cha, Matthew J. Highland, Andrew Ulvestad
Publikováno v:
Nano Letters. 17:1595-1601
Dissolution is critical to nanomaterial stability, especially for partially dealloyed nanoparticle catalysts. Unfortunately, highly active catalysts are often not stable in their reactive environments, preventing widespread application. Thus, focusin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ff53be95a9980854f627574c8f9e4ec
https://doi.org/10.1021/acs.nanolett.6b04760
https://doi.org/10.1021/acs.nanolett.6b04760