Single-particle mapping of nonequilibrium nanocrystal transformations
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 la...
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Published in | Science (American Association for the Advancement of Science) Vol. 354; no. 6314; pp. 874 - 877 |
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Main Authors | , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Association for the Advancement of Science
18.11.2016
The American Association for the Advancement of Science AAAS |
Subjects | |
Online Access | Get full text |
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Summary: | 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. 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. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Binational Science Foundation (BSF) USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division Defense Threat Reduction Agency (DTRA) Univ. of California, Berkeley, CA (United States) AC02-05CH11231; HDTRA1-13-1-0035; CHE-1416161; 2013/604 National Science Foundation (NSF) King Abdulaziz City for Science and Technology (KACST), Riyadh (Saudi Arabia) Arnold and Mabel Beckman Foundation |
ISSN: | 0036-8075 1095-9203 |
DOI: | 10.1126/science.aah4434 |