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Title: Single-particle mapping of nonequilibrium nanocrystal transformations

Journal Article · · Science
 [1];  [1];  [1];  [2];  [1];  [3];  [4];  [5];  [1];  [4];  [6];  [7];  [1];  [8]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry
  2. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry and Miller Inst. for Basic Research in Science
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
  4. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  5. Univ. of California, Berkeley, CA (United States). Biophysics Graduate Group
  6. Univ. of California, Berkeley, CA (United States). Dept. of Physics and Kavli Energy NanoScience Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  7. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Tel Aviv Univ., Ramat Aviv (Israel). Raymond and Beverly Sackler Center for Computational Molecular and Materials Science
  8. Univ. of California, Berkeley, CA (United States). Dept. of Chemistry, Dept. of Materials Science and Engineering and Kavli Energy NanoScience Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division

Chemists have developed mechanistic insight into numerous chemical reactions by thoroughly characterizing nonequilibrium species. Although methods to probe these processes are well established for molecules, analogous techniques for understanding intermediate structures in nanomaterials have been lacking. For this study, we monitor the shape evolution of individual anisotropic gold nanostructures as they are oxidatively etched in a graphene liquid cell with a controlled redox environment. Short-lived, nonequilibrium nanocrystals are observed, structurally analyzed, and rationalized through Monte Carlo simulations. Understanding these reaction trajectories provides important fundamental insight connecting high-energy nanocrystal morphologies to the development of kinetically stabilized surface features and demonstrates the importance of developing tools capable of probing short-lived nanoscale species at the single-particle level.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; King Abdulaziz City for Science and Technology (KACST), Riyadh (Saudi Arabia); Defense Threat Reduction Agency (DTRA); National Science Foundation (NSF); Binational Science Foundation (BSF); Univ. of California, Berkeley, CA (United States); Arnold and Mabel Beckman Foundation
Grant/Contract Number:
AC02-05CH11231; HDTRA1-13-1-0035; CHE-1416161; 2013/604
OSTI ID:
1347829
Alternate ID(s):
OSTI ID: 1436605
Journal Information:
Science, Journal Name: Science Vol. 354 Journal Issue: 6314; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 182 works
Citation information provided by
Web of Science

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