In Situ Monitoring of the Seeding
and Growth of Silver Metal–Organic Nanotubes by Liquid-Cell
Transmission Electron Microscopy
Posted on 2020-06-24 - 10:17
Metal–organic
nanotubes (MONTs) are highly ordered one-dimensional
crystalline porous frameworks. Despite being nanomaterials, virtually
all studies of MONTs rely on characterization of the bulk crystalline
material (micron-sized) by single-crystal X-ray diffraction. For MONTs
to achieve their raison d’être as tunable one-dimensional
nanomaterials, individual tubes or small finite bundles of tubes must
be synthesized and characterized. Therefore, to directly observe their
formation under a variety of reaction conditions in solution, we employ
liquid-cell transmission electron microscopy (LCTEM), which allows
the early stages of MONT assembly to be monitored in real time. Notably,
changing the metal-to-ligand ratio alters the local concentrations
of reactant monomers, resulting in multiple nucleation and growth
pathways and diverse morphologies at the nanoscale. These various
initial seeds grow to form the same nanocrystalline needle phase.
This approach of employing LCTEM to study these nanomaterials is analogous
to monitoring typical homogeneous solution phase reactions by NMR
for controlled nanomaterial formation.
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Gnanasekaran, Karthikeyan; Vailonis, Kristina M.; Jenkins, David M.; Gianneschi, Nathan C. (2020). In Situ Monitoring of the Seeding
and Growth of Silver Metal–Organic Nanotubes by Liquid-Cell
Transmission Electron Microscopy. ACS Publications. Collection. https://doi.org/10.1021/acsnano.0c03209
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AUTHORS (4)
KG
Karthikeyan Gnanasekaran
KV
Kristina M. Vailonis
DJ
David M. Jenkins
NG
Nathan C. Gianneschi