Magnetomotive nanoparticle transducers for optical rheology of viscoelastic materials.
Publication/Presentation Date
12-7-2009
Abstract
The availability of a real-time non-destructive modality to interrogate the mechanical properties of viscoelastic materials would facilitate many new investigations. We introduce a new optical method for measuring elastic properties of samples which employs magnetite nanoparticles as perturbative agents. Magnetic nanoparticles distributed in silicone-based samples are displaced upon probing with a small external magnetic field gradient and depth-resolved optical coherence phase shifts allow for the tracking of scatterers in the sample with nanometer-scale sensitivity. The scatterers undergo underdamped oscillations when the magnetic field is applied step-wise, allowing for the measurement of the natural frequencies of oscillation of the samples. Validation of the measurements is accomplished using a commercial indentation apparatus to determine the elastic moduli of the samples. This real-time non-destructive technique constitutes a novel way of probing the natural frequencies of viscoelastic materials in which magnetic nanoparticles can be introduced.
Volume
17
Issue
25
First Page
23114
Last Page
23122
ISSN
1094-4087
Published In/Presented At
Crecea, V., Oldenburg, A. L., Liang, X., Ralston, T. S., & Boppart, S. A. (2009). Magnetomotive nanoparticle transducers for optical rheology of viscoelastic materials. Optics express, 17(25), 23114–23122. https://doi.org/10.1364/OE.17.023114
Disciplines
Medicine and Health Sciences | Oncology
PubMedID
20052238
Department(s)
Department of Radiation Oncology
Document Type
Article