Time-resolved Brownian tomography of single nanocrystals in liquid during oxidative etching

Sungsu Kang, Joodeok Kim, Sungin Kim, Hoje Chun, Junyoung Heo, Cyril F. Reboul, Rubén Meana-Pañeda, Cong T. S. Van, Hyesung Choi, Yunseo Lee, Jinho Rhee, Minyoung Lee, Dohun Kang, Byung Hyo Kim, Taeghwan Hyeon, Byungchan Han (), Peter Ercius (), Won Chul Lee (), Hans Elmlund () and Jungwon Park ()
Additional contact information
Sungsu Kang: Seoul National University
Joodeok Kim: Seoul National University
Sungin Kim: Seoul National University
Hoje Chun: Yonsei University
Junyoung Heo: Seoul National University
Cyril F. Reboul: National Institutes of Health (NIH)
Rubén Meana-Pañeda: National Institutes of Health (NIH)
Cong T. S. Van: National Institutes of Health (NIH)
Hyesung Choi: Seoul National University
Yunseo Lee: Seoul National University
Jinho Rhee: Seoul National University
Minyoung Lee: Seoul National University
Dohun Kang: Seoul National University
Byung Hyo Kim: Soongsil University
Taeghwan Hyeon: Seoul National University
Byungchan Han: Yonsei University
Peter Ercius: Lawrence Berkeley National Laboratory
Won Chul Lee: Hanyang University
Hans Elmlund: National Institutes of Health (NIH)
Jungwon Park: Seoul National University

Nature Communications, 2025, vol. 16, issue 1, 1-13

Abstract: Abstract Colloidal nanocrystals inherently undergo structural changes during chemical reactions. The robust structure-property relationships, originating from their nanoscale dimensions, underscore the significance of comprehending the dynamic structural behavior of nanocrystals in reactive chemical media. Moreover, the complexity and heterogeneity inherent in their atomic structures require tracking of structural transitions in individual nanocrystals at three-dimensional (3D) atomic resolution. In this study, we introduce the method of time-resolved Brownian tomography to investigate the temporal evolution of the 3D atomic structures of individual nanocrystals in solution. The methodology is applied to examine the atomic-level structural transformations of Pt nanocrystals during oxidative etching. The time-resolved 3D atomic maps reveal the structural evolution of dissolving Pt nanocrystals, transitioning from a crystalline to a disordered structure. Our study demonstrates the emergence of a phase at the nanometer length scale that has received less attention in bulk thermodynamics.

Date: 2025
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DOI: 10.1038/s41467-025-56476-8

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