Unusual hydrogen implanted gold with lattice contraction at increased hydrogen content

Khac Thuan Nguyen, Vuong Van, The Nghia Nguyen, Trong Tinh Nguyen, Tomoyuki Yamamoto and Nam Nhat Hoang ()
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Khac Thuan Nguyen: VNU-University of Engineering and Technology
Vuong Van: VNU-Hanoi University of Science
The Nghia Nguyen: VNU-Hanoi University of Science
Trong Tinh Nguyen: Vietnam Academy of Science and Technology
Tomoyuki Yamamoto: Waseda University
Nam Nhat Hoang: VNU-University of Engineering and Technology

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract The experimental evidence for the contraction of volume of gold implanted with hydrogen at low doses is presented. The contraction of lattice upon the addition of other elements is very rare and extraordinary in the solid-state, not only for gold but also for many other solids. To explain the underlying physics, the pure kinetic theory of absorption is not adequate and the detailed interaction of hydrogen in the lattice needs to be clarified. Our analysis points to the importance of the formation of hydride bonds in a dynamic manner and explains why these bonds become weak at higher doses, leading to the inverse process of volume expansion frequently seen in metallic hydrogen containers.

Date: 2021
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DOI: 10.1038/s41467-021-21842-9

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