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Graphene microcapsule arrays for combinatorial electron microscopy and spectroscopy in liquids

Published

Author(s)

Alexander Yulaev, Hongxuan Guo, Evgheni Strelcov, Lei Chen, Ivan Vlasssiouk, Andrei A. Kolmakov

Abstract

An atomic-scale thickness, molecular impermeability, low atomic number, and mechanical strength make graphene an ideal electron transparent membrane for scanning electron microscopy and spectroscopy in liquids. Here, we present a novel sample platform made of an array of thousands of identical isolated graphene-capped micro-channels with high aspect ratio. A combination of the global wide field of view with local imaging of a microchannel array allows for high throughput screening of liquid samples. We demonstrate the capabilities of this platform studying a pure water, a model electrochemical plating process and a beam induced crystal growth in liquid electrolyte solutions. The spectroscopic capabilities such as Auger and X-ray fluorescence analysis of liquids and immersed objects through the graphene membrane have been demonstrated
Citation
ACS Applied Materials and Interfaces
Volume
9
Issue
31

Keywords

graphene, ambient pressure electron microscopy, liquid cell, electrochemistry

Citation

Yulaev, A. , Guo, H. , Strelcov, E. , Chen, L. , Vlasssiouk, I. and Kolmakov, A. (2017), Graphene microcapsule arrays for combinatorial electron microscopy and spectroscopy in liquids, ACS Applied Materials and Interfaces, [online], https://doi.org/10.1021/acsami.7b02824 (Accessed July 31, 2021)
Created April 27, 2017, Updated November 10, 2018