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Chemical Solution Deposition of Ordered 2D Arrays of Room-Temperature Ferrimagnetic Cobalt Ferrite Nanodots
- Source :
- Polymers, Vol 11, Iss 10, p 1598 (2019), Polymers, 11(10):1598. MDPI AG, Polymers, Volume 11, Issue 10, 'Polymers ', vol: 11, pages: 1598-1-1598-17 (2019)
- Publication Year :
- 2019
- Publisher :
- MDPI AG, 2019.
-
Abstract
- Over the past decades, the development of nano-scale electronic devices and high-density memory storage media has raised the demand for low-cost fabrication methods of two-dimensional (2D) arrays of magnetic nanostructures. Here, we present a chemical solution deposition methodology to produce 2D arrays of cobalt ferrite (CFO) nanodots on Si substrates. Using thin films of four different self-assembled block copolymers as templates, ordered arrays of nanodots with four different characteristic dimensions were fabricated. The dot sizes and their long-range arrangement were studied with scanning electron microscopy (SEM) and grazing incident small-angle X-ray scattering (GISAXS). The structural evolution during UV/ozone treatment and the following thermal annealing was investigated through monitoring the atomic arrangement with X-ray absorption fine structure spectroscopy (EXAFS) and checking the morphology at each preparation step. The preparation method presented here obtains array types that exhibit thicknesses less than 10 nm and blocking temperatures above room temperature (e.g., 312 K for 20 nm diameter dots). Control over the average dot size allows observing an increase of the blocking temperature with increasing dot diameter. The nanodots present promising properties for room temperature data storage, especially if a better control over their size distribution will be achieved in the future.
- Subjects :
- Nanostructure
Materials science
ADSORPTION
Polymers and Plastics
Scanning electron microscope
FABRICATION
block copolymer
02 engineering and technology
XPS SPECTRA
01 natural sciences
Article
lcsh:QD241-441
cobalt ferrite
lcsh:Organic chemistry
0103 physical sciences
Thin film
010302 applied physics
ANISOTROPY
MAGNETIC NANOPARTICLES
ferrimagnetic
Extended X-ray absorption fine structure
business.industry
IRON
OXIDE
MAGNETOSTRICTION
General Chemistry
nanodot
021001 nanoscience & nanotechnology
chemical solution deposition
2d arrays
BLOCK-COPOLYMERS
NANOCRYSTALS
Nanocrystal
Optoelectronics
Grazing-incidence small-angle scattering
Magnetic nanoparticles
Nanodot
0210 nano-technology
business
Subjects
Details
- Language :
- English
- ISSN :
- 20734360
- Volume :
- 11
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....fed4476290f222451b096a4c4d9e54a8