Carbon nanotubes loaded with magnetic particles.
We describe a simple and versatile technique to produce magnetic tubes by filling carbon nanotubes (CNTs) with paramagnetic iron oxide particles ( approximately 10 nm diameter). Commercial ferrofluids were used to fill CNTs with an average outer diameter of 300 nm made via chemical vapor deposition into alumina membranes. Transmission electron microscopy study shows a high density of particles inside the CNT. Experiments using external magnetic fields demonstrate that almost 100% of the nanotubes become magnetic and can be easily manipulated in magnetic field. These one-dimensional magnetic nanostructures can find numerous applications in nanotechnology, memory devices, optical transducers for wearable electronics, and in medicine.
Korneva
Guzeliya
G
Chemistry Department, A. J. Drexel Nanotechnology Institute, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, USA.
Ye
Haihui
H
Gogotsi
Yury
Y
Halverson
Derek
D
Friedman
Gary
G
Bradley
Jean-Claude
JC
Kornev
Konstantin G
KG
D003102:Colloids / Q000737:chemistry*; D004574:Electromagnetic Fields; D008280:Magnetics; D044085:Microfluidics / Q000379:methods*; D008846:Micromanipulation / Q000379:methods*; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size
D003102:Colloids; D037742:Nanotubes, Carbon