2011
DOI: 10.1016/j.apt.2011.03.009
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Systematic study of bimodal suspensions of latex nanoparticles using dynamic light scattering

Abstract: Determining the size of nanoparticles accurately, quickly and easily is becoming more and more important as the use of such particles increases. One of the common techniques for measuring the size of particles in suspension is dynamic light scattering (DLS). In principle, DLS is able to estimate the average particle size and its distribution. However, the measured correlation function or power spectrum must be inverted to obtain this size distribution. The inversion is an ill-conditioned mathematical problem, … Show more

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Cited by 23 publications
(13 citation statements)
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“…As expected from PDI, intensity‐based median sizes are about the same as average (mean) values. Due to DLS “blindness” for small particles, secondary nucleation was checked with TEM. Images in Figure reveal that there were not a significant number of secondary particles present at 10 mol% HEMA (Figure c).…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…As expected from PDI, intensity‐based median sizes are about the same as average (mean) values. Due to DLS “blindness” for small particles, secondary nucleation was checked with TEM. Images in Figure reveal that there were not a significant number of secondary particles present at 10 mol% HEMA (Figure c).…”
Section: Resultsmentioning
confidence: 99%
“…Average particle size is probably the most important parameter in emulsion polymerizations. Even though several direct and indirect methods are known, discrepancies are often observed, especially at highly polydisperse or bi‐/multi‐modal distributions . Comparison of average sizes of two indirect methods is made in Table .…”
Section: Discussionmentioning
confidence: 99%
“…Dynamic light scattering (DLS), as a representative of spectroscopic methods, is sufficiently accurate when particle size distribution (PSD) and average particle size of narrow monomodal dispersion is obtained . However, it is not possible for DLS to reproducibly detect a nascent bi‐/multi‐ modal distribution …”
Section: Introductionmentioning
confidence: 99%
“…Having applied an alternative model defining the auto-correlation function as a weighted distribution of decay rates, they succeeded in resolving the PSD of a mixture of 80 and 100 nm particles [7]. Indeed, analysis of bi-modal nanoparticle suspensions is still a great challenge, particularly when the difference between fractions' PSD is minor.…”
Section: Introductionmentioning
confidence: 99%
“…Up to now, a few studies have been dedicated to the topic of analyzing multi-modal nanoparticle suspensions [6][7][8]. And yet, there has been little effort to define a set of complementary analysis techniques, being capable of resolving the PSD in bimodal suspensions.…”
Section: Introductionmentioning
confidence: 99%