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Title: Reversible phase transformations between Pb nanocrystals and a viscous liquid-like phase

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]
  1. North University of China (China)
  2. Beijing Computational Science Research Center (China); Beijing Normal University, Beijing (China)
  3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  4. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry
  5. University of Chinese Academy of Sciences, Beijing (China)
  6. Univ. of California, Berkeley, CA (United States)
  7. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)

Phase transformations have been a prominent topic of study for both fundamental and applied science. Solid-liquid reaction–induced phase transformations can be hard to characterize, and the transformation mechanisms are often not fully understood. Here, we report reversible phase transformations between a metal (Pb) nanocrystal and a viscous liquid-like phase unveiled by in situ liquid cell transmission electron microscopy. The reversible phase transformations are obtained by modulating the electron current density (between 1000 and 3000 electrons Å–2 s–1). The metal-organic viscous liquid-like phase exhibits short-range ordering with a preferred Pb-Pb distance of 0.5 nm. Assisted by density functional theory and molecular dynamics calculations, we show that the viscous liquid-like phase results from the reactions of Pb with the CH3O fragments from the triethylene glycol solution under electron beam irradiation. Such reversible phase transformations may find broad implementations.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2396885
Journal Information:
Science Advances, Journal Name: Science Advances Journal Issue: 25 Vol. 10; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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