cMOF Evidence Base
Microscopy Morphology — Particle size dependence of proton conduction in a cationic lanthanum phosphonate MOF

Measurement evidence

Microscopy Morphology

Particle size dependence of proton conduction in a cationic lanthanum phosphonate MOF · Levenson D.A., Zhang J., Gelfand B.S. et al. · Dalton Transactions · 2020 · 4022-4029

2 measurement groups · 4 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

FRITSCH analysette22 Nanotec/Microtec convergent laser particle-size analysis

as-synthesised PCMOF21-AcO bulk powder · Powder

Approximately 0.5 g PCMOF21-AcO powder ultrasonicated in isopropanol and transferred to liquid dispersion unit.

Atmosphere
isopropanol dispersion
Geometry
laser particle analyser
Context
pristine powder
Measurement source
p002 / journal page 4023 · Particle size analysis · Figure 7
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
particle-size distribution shapebimodal distribution with a small-particle mode around 5-10 um and a large-particle mode around 150-200 um by visual reading——Figure Axis
Approximate		p006 / journal page 4027 · Particle-size discussion · Figure 7
laser particle-size analysis caveatparticle analyser can overestimate the amount of large particles because it assumes spherical particles whereas sieves sort by edge length——Text
Qualitative		p006 / journal page 4027 · Particle-size discussion · Figure 7

scanning electron microscopy

Scanning electron microscopy

as-synthesised PCMOF21-AcO bulk powder · Powder

Zeiss SIGMA VP; samples spread on carbon tape on Al pins, vacuum overnight; 2 keV accelerating voltage; thermal field emission source; 1 x 10-7 bar chamber pressure.

Atmosphere
vacuum, 1 x 10-7 bar
Geometry
SEM on carbon tape
Context
pristine powder and post-impedance fractions
Measurement source
p002 / journal page 4023 · Scanning electron microscopy (SEM) measurements · Figure 6; Figure S2
PropertyReported valueNormalised valueUncertaintyOrigin and qualitySource
post-impedance morphology retentionno significant change to morphology for <38 um and >=210 um particles; 125-180 um particles appear to have smaller particles likely from crushing——Text
Qualitative		p006 / journal page 4027 · Particle-size discussion · Figure S2
particle morphologyparticles are clearly rod shaped instead of spherical——Text
Qualitative		p006 / journal page 4027 · Particle-size discussion · Figure 6; Figure S2