Morphological evolution of an Au crystalline domain in a nano-particle investigated by Bragg coherent diffraction imaging
Abstract
Understanding the dynamic structural evolution of metallic nanoparticles is crucial for tailoring their functional properties. In this study, we utilized three-dimensional coherent X-ray diffraction to investigate the morphological transformation of Au nanocrystalline domains in a multi-domain nanoparticle during in-situ annealing. By combining Bragg coherent diffraction imaging with autocorrelation function analysis, we observed a transformation from an anisotropic multi-domain configuration toward a single crystalline equilibrium morphology. Above 600 degrees Celsius, a small subsidiary domain merged into the primary domain, which was continuously coarsened at 625 degrees Celsius, resulting in a more isotropic morphology. Finally, at 635 degrees Celsius, the low-energy {111} and {100} facets emerged, and the crystal shape converged toward an equilibrium truncated octahedral geometry. This work demonstrates a framework for interpreting complex domain dynamics, offering fundamental insights into domain growth and equilibrium shape formation.
Related
- Particle chemomechanics revealed by complementary operando microLaue diffraction and optical microscopy: the case of Nb 14 W 3 O 44 anode
- Liquid crystalline order and its impact on shape evolution of fluid lipid membranes
- Field evolution of the multi-k magnetic states in NdB4 revealed by neutron diffraction
- Substrate-dependent thermally driven morphological evolution of Pt0.9Ni0.1 thin films on sapphire and langasite
- Nonlocal Magic Spreading in Many-body Quantum Dynamics: From Chaotic Evolution to Quasi-particle Picture in Integrable Models
BibTeX
@misc{han2026morphological,
title = {{Morphological evolution of an Au crystalline domain in a nano-particle investigated by Bragg coherent diffraction imaging}},
author = {Seonghyun Han and Saehyun Kang and Ouyoung Kwon and Wonsuk Cha and Hyon Chol Kang and Chan Kim and Do Young Noh},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.28346},
eprint = {2609.28346},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.28346},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Morphological evolution of an Au crystalline domain in a nano-particle investigated by Bragg coherent diffraction imaging
AU - Seonghyun Han
AU - Saehyun Kang
AU - Ouyoung Kwon
AU - Wonsuk Cha
AU - Hyon Chol Kang
AU - Chan Kim
AU - Do Young Noh
PY - 2026
DA - 2026/09/23
PB - arXiv
DO - 10.48550/arxiv.2609.28346
UR - https://arxiv.org/abs/2609.28346
AB - Understanding the dynamic structural evolution of metallic nanoparticles is crucial for tailoring their functional properties. In this study, we utilized three-dimensional coherent X-ray diffraction to investigate the morphological transformation of Au nanocrystalline domains in a multi-domain nanoparticle during in-situ annealing. By combining Bragg coherent diffraction imaging with autocorrelation function analysis, we observed a transformation from an anisotropic multi-domain configuration toward a single crystalline equilibrium morphology. Above 600 degrees Celsius, a small subsidiary domain merged into the primary domain, which was continuously coarsened at 625 degrees Celsius, resulting in a more isotropic morphology. Finally, at 635 degrees Celsius, the low-energy {111} and {100} facets emerged, and the crystal shape converged toward an equilibrium truncated octahedral geometry. This work demonstrates a framework for interpreting complex domain dynamics, offering fundamental insights into domain growth and equilibrium shape formation.
ER -