Enhanced magnetism in highly ordered magnetite nanoparticle-filled nanohole arrays

Binh Duong, Hafsa Khurshid, Palash Gangopadhyay, Jagannath Devkota, Kristen Stojak, Hariharan Srikanth, Laurene Tetard, Robert A Norwood, Nasser N Peyghambarian, Manh Huong Phan, Jayan Thomas

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A new approach to develop highly ordered magnetite (Fe3O 4) nanoparticle-patterned nanohole arrays with desirable magnetic properties for a variety of technological applications is presented. In this work, the sub-100 nm nanohole arrays are successfully fabricated from a pre-ceramic polymer mold using spin-on nanoprinting (SNAP). These nanoholes a then filled with monodispersed, spherical Fe3O4 nanoparticles of about 10 nm diameter using a novel magnetic drag and drop procedure. The nanohole arrays filled with magnetic nanoparticles a imaged using magnetic force microscopy (MFM). Magnetometry and MFM measurements reveal room temperature ferromagnetism in the Fe3O4-filled nanohole arrays, while the as-synthesized Fe3O4 nanoparticles exhibit superparamagnetic behavior. As revealed by MFM measurements, the enhanced magnetism in the Fe3O4-filled nanohole arrays originates mainly from the enhanced magnetic dipole interactions of Fe 3O4 nanoparticles within the nanoholes and between adjacent nanoholes. Nanoparticle filled nanohole arrays can be highly beneficial in magnetic data storage and other applications such as microwave devices and biosensor arrays that require tunable and anisotropic magnetic properties.

Original languageEnglish (US)
Pages (from-to)2840-2848
Number of pages9
JournalSmall
Volume10
Issue number14
DOIs
StatePublished - Jul 23 2014

Fingerprint

Magnetite Nanoparticles
Magnetite nanoparticles
Magnetism
Nanoparticles
Magnetic force microscopy
Atomic Force Microscopy
Magnetic properties
Magnetometry
Magnetic storage
Ferrosoferric Oxide
Microwave devices
Information Storage and Retrieval
Ferromagnetism
Ceramics
Biosensing Techniques
Magnetite
Microwaves
Biosensors
Drag
Polymers

Keywords

  • magnetic force microscopy
  • magnetometry
  • nanohole arrays
  • nanoimprinting
  • SNAP

ASJC Scopus subject areas

  • Biomaterials
  • Engineering (miscellaneous)
  • Biotechnology

Cite this

Duong, B., Khurshid, H., Gangopadhyay, P., Devkota, J., Stojak, K., Srikanth, H., ... Thomas, J. (2014). Enhanced magnetism in highly ordered magnetite nanoparticle-filled nanohole arrays. Small, 10(14), 2840-2848. https://doi.org/10.1002/smll.201303809

Enhanced magnetism in highly ordered magnetite nanoparticle-filled nanohole arrays. / Duong, Binh; Khurshid, Hafsa; Gangopadhyay, Palash; Devkota, Jagannath; Stojak, Kristen; Srikanth, Hariharan; Tetard, Laurene; Norwood, Robert A; Peyghambarian, Nasser N; Phan, Manh Huong; Thomas, Jayan.

In: Small, Vol. 10, No. 14, 23.07.2014, p. 2840-2848.

Research output: Contribution to journalArticle

Duong, B, Khurshid, H, Gangopadhyay, P, Devkota, J, Stojak, K, Srikanth, H, Tetard, L, Norwood, RA, Peyghambarian, NN, Phan, MH & Thomas, J 2014, 'Enhanced magnetism in highly ordered magnetite nanoparticle-filled nanohole arrays', Small, vol. 10, no. 14, pp. 2840-2848. https://doi.org/10.1002/smll.201303809
Duong B, Khurshid H, Gangopadhyay P, Devkota J, Stojak K, Srikanth H et al. Enhanced magnetism in highly ordered magnetite nanoparticle-filled nanohole arrays. Small. 2014 Jul 23;10(14):2840-2848. https://doi.org/10.1002/smll.201303809
Duong, Binh ; Khurshid, Hafsa ; Gangopadhyay, Palash ; Devkota, Jagannath ; Stojak, Kristen ; Srikanth, Hariharan ; Tetard, Laurene ; Norwood, Robert A ; Peyghambarian, Nasser N ; Phan, Manh Huong ; Thomas, Jayan. / Enhanced magnetism in highly ordered magnetite nanoparticle-filled nanohole arrays. In: Small. 2014 ; Vol. 10, No. 14. pp. 2840-2848.
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