Nanoscale interparticle distance within dimers in solution measured by light scattering

R.W.L. van Vliembergen, L.J. van Ijzendoorn, M.W.J. Prins

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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We demonstrate a novel approach to quantify the interparticle distance in colloidal dimers using Mie scattering. The interparticle distance is varied in a controlled way by changing the ionic strength of the solution and the magnetic attraction between the particles. The measured scaling behavior is interpreted using an energy-distance model that includes the repulsive electrostatic and attractive magnetic interactions. The center-to-center distances of particles with a 525 nm radius can be determined with a root-mean-square accuracy of 12 nm. The data show that the center-to-center distance is larger by 83 nm compared to perfect spheres. The underlying distance offset can be attributed to repulsion by charged protrusions caused by particle surface roughness. The measurement method accurately quantifies interparticle distances that can be used to study cluster formation and colloid aggregation in complex systems, e.g., in biosensing applications.

Originele taal-2Engels
Pagina's (van-tot)179-186
Aantal pagina's8
TijdschriftLangmuir
Volume34
Nummer van het tijdschrift1
DOI's
StatusGepubliceerd - 9 jan 2018

Vingerafdruk

Colloids
Ionic strength
Dimers
Light scattering
Large scale systems
Electrostatics
light scattering
Agglomeration
Surface roughness
dimers
Scattering
Mie scattering
complex systems
attraction
colloids
surface roughness
electrostatics
scaling
radii

Citeer dit

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Nanoscale interparticle distance within dimers in solution measured by light scattering. / van Vliembergen, R.W.L.; van Ijzendoorn, L.J.; Prins, M.W.J.

In: Langmuir, Vol. 34, Nr. 1, 09.01.2018, blz. 179-186.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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