4.8 Article

High-Resolution EM of Colloidal Nanocrystal Growth Using Graphene Liquid Cells

Journal

SCIENCE
Volume 336, Issue 6077, Pages 61-64

Publisher

AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1217654

Keywords

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Funding

  1. Physical Chemistry of Inorganic Nanoscrystals Program [KC3105]
  2. Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy (DOE) [DE-AC02-05CH11231]
  3. DOE [DE-AC02-05CH11231]
  4. National Research Foundation of Korea
  5. Ministry of Education, Science and Technology [2010-0029714]
  6. Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the DOE [DE-AC02-05CH11231]
  7. Office of Naval Research [N00014-09-1-1066]
  8. NSF [EEC-0832819]
  9. National Research Foundation of Korea [2009-0094038] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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We introduce a new type of liquid cell for in situ transmission electron microscopy (TEM) based on entrapment of a liquid film between layers of graphene. The graphene liquid cell facilitates atomic-level resolution imaging while sustaining the most realistic liquid conditions achievable under electron-beam radiation. We employ this cell to explore the mechanism of colloidal platinum nanocrystal growth. Direct atomic-resolution imaging allows us to visualize critical steps in the process, including site-selective coalescence, structural reshaping after coalescence, and surface faceting.

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