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Updated: Aug 11, 2025

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography
Published on: October 21, 2018
Subsurface reconstruction and saturation of surface bonds
Linhan Liu1, Yonghao Sun1, Zhiying Cheng1
1National Center for Electron Microscopy in Beijing, School of Aterials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
Insulator surfaces are challenging. This study reveals spinel (111) surface stabilization via subsurface reconstruction, not surface changes, offering new insights into complex oxide stability.
Area of Science:
- Materials Science
- Surface Science
- Solid-State Physics
Background:
- Surface reconstruction and stabilization are critical challenges for insulating materials.
- Understanding these phenomena is crucial for predicting and controlling material properties.
Purpose of the Study:
- To determine the atomic structure of the spinel (111) surface.
- To elucidate the unconventional stabilization mechanism of this surface.
Main Methods:
- Accurate determination of the atomic structure of the spinel (111) surface.
- Analysis of surface and subsurface atomic arrangements and chemical bonding.
Main Results:
- The spinel (111) surface is stabilized by a unique mechanism involving subsurface rearrangement.
- The topmost atomic layer remains intact, while subsurface atoms rearrange to compensate for surface polarity.
- This reconstruction leads to fully saturated surface bonds and significantly reduced surface energy.
Conclusions:
- The spinel (111) surface exhibits an unconventional stabilization mechanism.
- Subsurface reconstruction, rather than surface reconstruction, is key to its stability.
- This finding offers novel insights into the surface behavior of complex oxides and insulators.
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