Jump to main content
Jump to site search

Issue 43, 2018
Previous Article Next Article

Vibrational response of clusters of Fe3O4 nanoparticles patterned on glass surfaces investigated with magnetic sample modulation AFM

Author affiliations

Abstract

The vibration of Fe3O4 nanoparticles in response to an alternating magnetic field can be sensitively detected using contact mode atomic force microscopy (AFM) combined with selective modulation of magnetic domains. While imaging patterned samples of magnetic nanoparticles with contact mode AFM, a magnetic field was applied to drive sample vibration. The field altered in polarity and strength according to parameters of an AC current applied to a solenoid located under the sample. The vibration of Fe3O4 nanoparticles was detected by a nonmagnetic AFM tip to map the changes in frequency and amplitude of the vibrating sample at the level of individual Fe3O4 nanoparticles and clusters. Colloidal lithography, was used to prepare patterns of Fe3O4 nanoparticles on a glass surface using the basic steps of mixing, drying and removing the surface template of latex spheres. Monodisperse latex spheres were used to guide the deposition of magnetic nanoparticles in the spaces between the close-packed spheres of the latex film. With a mixture approach of “two-particle” lithography, 2D arrays of patterned aggregates of metal nanoparticles were generated which formed a periodic, well-defined arrangement that was suitable for subsequent characterizations with magnetic sample modulation (MSM).

Graphical abstract: Vibrational response of clusters of Fe3O4 nanoparticles patterned on glass surfaces investigated with magnetic sample modulation AFM

Back to tab navigation

Article information


Submitted
31 Jul 2018
Accepted
23 Oct 2018
First published
23 Oct 2018

Nanoscale, 2018,10, 20426-20434
Article type
Paper
Author version available

Vibrational response of clusters of Fe3O4 nanoparticles patterned on glass surfaces investigated with magnetic sample modulation AFM

S. A. Kulkarni, A. G. Kolhatkar, T. R. Lee and J. C. Garno, Nanoscale, 2018, 10, 20426
DOI: 10.1039/C8NR06174B

Social activity

Search articles by author

Spotlight

Advertisements