Type

Journal Article

Authors

John Francis Donegan
Aliaksandra Rakovich
Mustafa Lotya
Jonathan Nesbit Coleman

Subjects

Physics

Topics
standard radius particle size distribution exfoliated nanosheets exfoliation light scattering graphene size

Measuring the lateral size of liquid-exfoliated nanosheets with dynamic light scattering (2013)

Abstract We have developed an in-situ method to estimate the lateral size of exfoliated nanosheets dispersed in a liquid. Using standard liquid exfoliation and size-selection techniques, we prepared a range of dispersions of graphene, MoS2 and WS2 nanosheets with different mean lateral sizes. The mean nanosheet length was measured using transmission electron microscopy (TEM) to vary from ~40 nm to ~1 ?m. These dispersions were characterised using a standard dynamic light scattering (DLS) instrument. We found a well-defined correlation between the peak of the particle size distribution as outputted by the DLS instrument and the nanosheet length as measured by TEM. This correlation is consistent with the DLS instrument outputting the radius of the sphere with volume equal to the mean nanosheet volume. This correlation allows the mean nanosheet length to be extracted from DLS data.
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Full list of authors on original publication

John Francis Donegan, Aliaksandra Rakovich, Mustafa Lotya, Jonathan Nesbit Coleman

Experts in our system

1
John Francis Donegan
Trinity College Dublin
Total Publications: 166
 
2
Mustafa Lotya
Trinity College Dublin
Total Publications: 19
 
3
Jonathan Coleman
Trinity College Dublin
Total Publications: 217