Next Article in Journal
Endoplasmic Reticulum Stress Cooperates in Zearalenone-Induced Cell Death of RAW 264.7 Macrophages
Next Article in Special Issue
Exploiting Size-Dependent Drag and Magnetic Forces for Size-Specific Separation of Magnetic Nanoparticles
Previous Article in Journal / Special Issue
Polymer/Iron Oxide Nanoparticle Composites—A Straight Forward and Scalable Synthesis Approach
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Int. J. Mol. Sci. 2015, 16(8), 19769-19779; doi:10.3390/ijms160819769

Magnetic Nanoparticle Arrays Self-Assembled on Perpendicular Magnetic Recording Media

Smart State Center for Experimental Nanoscale Physics, Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, USA
MagAssemble, Irmo, SC 29063, USA
Author to whom correspondence should be addressed.
Academic Editor: O. Thompson Mefford
Received: 29 June 2015 / Revised: 29 July 2015 / Accepted: 12 August 2015 / Published: 20 August 2015
(This article belongs to the Special Issue Magnetic Nanoparticles 2015)
View Full-Text   |   Download PDF [842 KB, uploaded 20 August 2015]   |  


We study magnetic-field directed self-assembly of magnetic nanoparticles onto templates recorded on perpendicular magnetic recording media, and quantify feature width and height as a function of assembly time. Feature widths are determined from Scanning Electron Microscope (SEM) images, while heights are obtained with Atomic Force Microscopy (AFM). For short assembly times, widths were ~150 nm, while heights were ~14 nm, a single nanoparticle on average with a 10:1 aspect ratio. For long assembly times, widths approach 550 nm, while the average height grows to 3 nanoparticles, ~35 nm; a 16:1 aspect ratio. We perform magnetometry on these self-assembled structures and observe the slope of the magnetic moment vs. field curve increases with time. This increase suggests magnetic nanoparticle interactions evolve from nanoparticle–nanoparticle interactions to cluster–cluster interactions as opposed to feature–feature interactions. We suggest the aspect ratio increase occurs because the magnetic field gradients are strongest near the transitions between recorded regions in perpendicular media. If these gradients can be optimized for assembly, strong potential exists for using perpendicular recording templates to assemble complex heterogeneous materials. View Full-Text
Keywords: nanomanufacturing; self-assembly; magnetic nanoparticle; magnetophoresis; perpendicular magnetic recording; pattern transfer nanomanufacturing; self-assembly; magnetic nanoparticle; magnetophoresis; perpendicular magnetic recording; pattern transfer

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Mohtasebzadeh, A.R.; Ye, L.; Crawford, T.M. Magnetic Nanoparticle Arrays Self-Assembled on Perpendicular Magnetic Recording Media. Int. J. Mol. Sci. 2015, 16, 19769-19779.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top