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Open Access Highly Accessed Nano Review

Characterization of magnetic nanoparticle by dynamic light scattering

JitKang Lim12*, Swee Pin Yeap1, Hui Xin Che1 and Siew Chun Low1

Author Affiliations

1 School of Chemical Engineering, Universiti Sains Malaysia, Nibong Tebal, Penang, 14300, Malaysia

2 Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213, USA

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Nanoscale Research Letters 2013, 8:381  doi:10.1186/1556-276X-8-381

Published: 8 September 2013

Abstract

Here we provide a complete review on the use of dynamic light scattering (DLS) to study the size distribution and colloidal stability of magnetic nanoparticles (MNPs). The mathematical analysis involved in obtaining size information from the correlation function and the calculation of Z-average are introduced. Contributions from various variables, such as surface coating, size differences, and concentration of particles, are elaborated within the context of measurement data. Comparison with other sizing techniques, such as transmission electron microscopy and dark-field microscopy, revealed both the advantages and disadvantages of DLS in measuring the size of magnetic nanoparticles. The self-assembly process of MNP with anisotropic structure can also be monitored effectively by DLS.

Keywords:
Dynamic light scattering; Magnetic nanoparticles; Colloidal stability; Surface functionalization; Review