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Desk-top magnetic susceptometer for rapid room temperature measurements
Type
Specific technique

Host organisation
Department of Materials Science and Engineering (School of Industrial Engineering and Management)
Brinellvägen 23, Materials Science and Engineering, KTH | 100 44 Stockholm
Tel: +46-8-790 83 91

Our patented desk top suscepotometer is a rapid yet highly sensitive instrument for measuring the magnetic properties of nanoparticles, and is especially useful in biodiagnostics. Ability to carry out quick (in a time scale seconds) measurement of room temperature magnetic susceptibility components, i.e. change in the real and imaginary part of the magnetization at low external fields and as a function of frequency, is of importance for many applications.

Facility website: www.mse.kth.se/
Interest in collaboration with industry: Yes

Description

Two long standing demands for applications of magnetic nanoparticles in medical applications have been a challenge: 

  1. Routinely reproducible reliable batch of nanomagnetic particles with a narrow size distribution
  1. ability to measure and determine the characteristics of even very low concentrations, in the ppm regime, of the magnetic content in suspensions. 
Our team has recently established capabilities for determining both of them. 
We are looking for active research groups who may wish to exploit our capabilities to produce magnetic particles and also characterize them for various biological applications: therapy as well as diagnostics. We would even be interested in designing new instrumentation for specific applications in interdisciplinary projects with people from bioscientific research groups.

 

Infrastructure/methods

The main applications of the susceptometer are:

  • magnetic characterization of liquid samples or particles in suspensions in a few seconds.
  • frequency dependence determination to study the consequences of encapsulated particles.
  • magnetic field strength dependence determination. 
The desktop susceptometer is simple and quick; a measurement only takes a few seconds. It has very high sensitivity and yields both in- and out-of-phase susceptibility. It covers a wide frequency range, from a few Hz to tens of kHz and does not require low temperature or cryogen. The access to the measuring zone is easy, which is a simple 6mm diameter bore. 
An instrument for measuring the surface spreading of magnetic particles is also under development.

 

Practical information

We are looking for researchers interested in exploiting our capabilities to produce magnetic particles and also to characterize them for various biological applications. 
We are also interested in designing new instrumentation for specific applications in interdisciplinary projects.
For more information, please download the pdf below, or contact us.


Keywords
magnetism, nano, biotechnology, magnetic nanoparticles, sensors, clinical, industryinterest
Categories
Present in the following regions
Stockholm
Contact
Researcher
Professor K Venkat Rao
Phone: +46 8 790 77 71
Email: Contact me


Researcher
Research Associate Valter Ström
Phone: +46 8 790 73 08
Email: Contact me



Last updated: 2011-05-30