Time dependence of light transmission in nanoparticle ferrofluids

In this work, the time dependence of light transmission ( T) through magnetic fluid is measured for a period of 600 s at different applied magnetic fields and at different fluid concentrations. The magnetic fluid consists of Fe 3O 4 nanoparticles with an average diameter of 36 nm. The data show that...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2010-05, Vol.322 (9), p.1669-1672
Main Authors: Sakhnini, Lama, El-Hilo, M.
Format: Article
Language:English
Subjects:
Chaining
Clusters
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Light transmission
Magnetic fluid
Magnetic fluids
Merging
Nanocomposites
Nanomaterials
Nanoparticle
Nanostructure
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of bulk materials and thin films
Physics
Relaxation process
Time dependence
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, the time dependence of light transmission ( T) through magnetic fluid is measured for a period of 600 s at different applied magnetic fields and at different fluid concentrations. The magnetic fluid consists of Fe 3O 4 nanoparticles with an average diameter of 36 nm. The data show that after the field is switched on, the light transmission increases monotonically with time for the first 10 s. After that the light transmission is observed to decrease with time. The time variation of light transmission in this system is explained in the frame of two relaxation regimes, first involves clusters formation which is responsible for the increase in T with time, and second involves clusters merging which is responsible for the decrease in T with time.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2009.04.070