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Title: Graphene Microcapsule Arrays for Combinatorial Electron Microscopy and Spectroscopy in Liquids

Journal Article · · ACS Applied Materials and Interfaces
 [1];  [2];  [3];  [4]; ORCiD logo [5]; ORCiD logo [4]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Nanoscale Science and Technology; Univ. of Maryland, College Park, MD (United States). Dept. of Materials Science and Engineering; Univ. of Maryland, College Park, MD (United States). Maryland NanoCenter
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Nanoscale Science and Technology; Univ. of Maryland, College Park, MD (United States). Maryland NanoCenter
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Nanoscale Science and Technology; Univ. of Maryland, College Park, MD (United States). Maryland NanoCenter
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Nanoscale Science and Technology
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Atomic-scale thickness, molecular impermeability, low atomic number, and mechanical strength make graphene an ideal electron-transparent membrane for material characterization in liquids and gases with scanning electron microscopy and spectroscopy. Here in this paper, we present a novel sample platform made of an array of thousands of identical isolated graphene-capped microchannels with high aspect ratio. A combination of a global wide field of view with high resolution local imaging of the array allows for high throughput in situ studies as well as for combinatorial screening of solutions, liquid interfaces, and immersed samples. We demonstrate the capabilities of this platform by studying a pure water sample in comparison with alkali halide solutions, a model electrochemical plating process, and beam-induced crystal growth in liquid electrolyte. Spectroscopic characterization of liquid interfaces and immersed objects with Auger and X-ray fluorescence analysis through the graphene membrane are also demonstrated.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1399453
Journal Information:
ACS Applied Materials and Interfaces, Vol. 9, Issue 31; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (2)

Studies of surface of metal nanoparticles in a flowing liquid with XPS journal January 2018
State-of-the-Art and Future Prospects for Atomically Thin Membranes from 2D Materials journal August 2018