Back to Search Start Over

Multifunctional magnetic rotator for micro and nanorheological studies.

Authors :
Tokarev A
Aprelev A
Zakharov MN
Korneva G
Gogotsi Y
Kornev KG
Source :
The Review of scientific instruments [Rev Sci Instrum] 2012 Jun; Vol. 83 (6), pp. 065110.
Publication Year :
2012

Abstract

We report on the development of a multifunctional magnetic rotator that has been built and used during the last five years by two groups from Clemson and Drexel Universities studying the rheological properties of microdroplets. This magnetic rotator allows one to generate rotating magnetic fields in a broad frequency band, from hertz to tens kilohertz. We illustrate its flexibility and robustness by conducting the rheological studies of simple and polymeric fluids at the nano and microscale. First we reproduce a temperature-dependent viscosity of a synthetic oil used as a viscosity standard. Magnetic rotational spectroscopy with suspended nickel nanorods was used in these studies. As a second example, we converted the magnetic rotator into a pump with precise controlled flow modulation. Using multiwalled carbon nanotubes, we were able to estimate the shear modulus of sickle hemoglobin polymer. We believe that this multifunctional magnetic system will be useful not only for micro and nanorheological studies, but it will find much broader applications requiring remote controlled manipulation of micro and nanoobjects.

Details

Language :
English
ISSN :
1089-7623
Volume :
83
Issue :
6
Database :
MEDLINE
Journal :
The Review of scientific instruments
Publication Type :
Academic Journal
Accession number :
22755665
Full Text :
https://doi.org/10.1063/1.4729795