Unusual hydrogen implanted gold with lattice contraction at increased hydrogen content.

Autor: Nguyen, Khac Thuan, Hiep Vuong, Van, Nguyen, The Nghia, Nguyen, Trong Tinh, Yamamoto, Tomoyuki, Hoang, Nam Nhat
Předmět:
Zdroj: Nature Communications; 3/10/2021, Vol. 12 Issue 1, p1-9, 9p
Abstrakt: 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. Hydrogen can be absorbed into various metals, but generally causes the metals to expand. Here the authors show that when hydrogen is dynamically bound to the lattice, as in dilute Au:H solutions, the gold contracts accordingly. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz: