Collins, SM orcid.org/0000-0002-5151-6360, Kepaptsoglou, DM, Hou, J et al. (5 more authors) (2020) Functional Group Mapping by Electron Beam Vibrational Spectroscopy from Nanoscale Volumes. Nano Letters, 20 (2). pp. 1272-1279. ISSN 1530-6984
Abstract
Vibrational spectroscopies directly record details of bonding in materials, but spatially resolved methods have been limited to surface techniques for mapping functional groups at the nanoscale. Electron energy loss spectroscopy (EELS) in the scanning transmission electron microscope presents a route to functional group analysis from nanoscale volumes using transmitted subnanometer electron probes. Here, we now use vibrational EELS to map distinct carboxylate and imidazolate linkers in a metal–organic framework (MOF) crystal–glass composite material. Domains <100 nm in size are observed using vibrational EELS, with recorded spatial resolution <15 nm at interfaces in the composite. This nanoscale functional group mapping is confirmed by correlated EELS at core ionization edges as well as X-ray energy dispersive spectroscopy for elemental mapping of the metal centers of the two constituent MOFs. These results present a complete nanoscale analysis of the building blocks of the MOF composite and establish spatially resolved functional group analysis using electron beam spectroscopy for crystalline and amorphous organic and metal–organic solids.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © American Chemical Society. This is an author produced version of a journal article published in Nano Letters. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Vibrational spectroscopy; electron energy loss spectroscopy; metal−organic frameworks; electron microscopy |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Jan 2020 11:10 |
Last Modified: | 16 Jan 2021 01:39 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acs.nanolett.9b04732 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155739 |