Drop-casted self-assembling graphene oxide membranes for scanning electron microscopy on wet and dense gaseous samples

Mark Krueger, Shannon Berg, Darcy Stone, Evgheni Strelcov, Dmitriy A. Dikin, Jaemyung Kim, Laura J. Cote, Jiaxing Huang, Andrei Kolmakov*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

Graphene oxide sheets dispersed in water and many other solvents can spontaneously assemble into a surface film covering an evaporating droplet due to their amphiphilicity. Thus, graphene oxide membranes with controllable thickness suspended over an orifice have been directly fabricated using a simple drop-cast approach. Mechanical properties and electron transparency tests of these membranes show their use as electron transparent, but molecularly impenetrable, windows for environmental electron microscopy in liquids and dense gaseous media. The foreseeable, broader application of this drop-cast window methodology is the creation of access spots for electron probes to study isolated microsamples in their natural, undisrupted state within the interior of prefabricated devices (such as microfluidic chips or sealed containers of biological, chemically reactive, toxic, or forensic materials).

Original languageEnglish (US)
Pages (from-to)10047-10054
Number of pages8
JournalACS nano
Volume5
Issue number12
DOIs
StatePublished - Dec 27 2011

Keywords

  • drop-casting
  • graphene oxide
  • in situ electron microscopy
  • self-assembled membrane

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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