Preserving high-pressure solids via freestanding thin-film engineering

Tao Liang, Zhidan Zeng (), Ziyin Yang, Fujun Lan, Hongbo Lou, Chendi Yang, Di Peng, Yuxin Liu, Tao Luo, Zhenfang Xing, Qing Wang, Haibo Ke, Yong Yang (), Renchao Che (), Hongwei Sheng, Ho-kwang Mao and Qiaoshi Zeng ()
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Tao Liang: Center for High Pressure Science and Technology Advanced Research
Zhidan Zeng: Center for High Pressure Science and Technology Advanced Research
Ziyin Yang: City University of Hong Kong
Fujun Lan: Center for High Pressure Science and Technology Advanced Research
Hongbo Lou: Center for High Pressure Science and Technology Advanced Research
Chendi Yang: Fudan University
Di Peng: Shanghai Advanced Research in Physical Sciences (SHARPS)
Yuxin Liu: Center for High Pressure Science and Technology Advanced Research
Tao Luo: Center for High Pressure Science and Technology Advanced Research
Zhenfang Xing: Center for High Pressure Science and Technology Advanced Research
Qing Wang: Shanghai University
Haibo Ke: Songshan Lake Materials Laboratory
Yong Yang: City University of Hong Kong
Renchao Che: Fudan University
Hongwei Sheng: George Mason University
Ho-kwang Mao: Center for High Pressure Science and Technology Advanced Research
Qiaoshi Zeng: Center for High Pressure Science and Technology Advanced Research

Nature Communications, 2025, vol. 16, issue 1, 1-6

Abstract: Abstract High pressure can significantly alter atomic and electronic structures of materials, resulting in unique properties. However, pressure-induced changes are often reversible, limiting their fundamental research and practical applications under ambient conditions. Here, we introduce a general method to preserve high-pressure solids under ambient conditions. By using freestanding carbon-gold-nanoparticle-carbon sandwiched thin films as precursors, we synthesize nanostructured diamond capsules that encapsulate high-pressure gold via an amorphous carbon-to-diamond transition. The preserved pressure is demonstrated to be tunable, ranging from 15.6 to 26.2 GPa, as the synthesis pressure increases from 32.0 to 56.0 GPa. This study establishes a scalable method to preserve high-pressure solids with controllable particle size and distribution through thin film engineering. Moreover, it enables in situ characterization of high-pressure solids with high spatial resolution at the atomic scale using electron beams, as well as other general diagnostic probes, and provides a viable route for large-scale applications of high-pressure solids.

Date: 2025
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DOI: 10.1038/s41467-025-61260-9

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