September 30, 2014
In this work, a novel
magnetic nanocomposite has been implemented as artificial hair (also called
cilia) on a giant magnetoimpedance (GMI) sensor for biomimetic flow sensing. Bending
of the nanocomposite cilia due to a fluid flow causes a change in the magnetic
field at the GMI sensor and a corresponding change in impedance. The permanent
magnetic nanowires and the high elasticity of the cilia result in a
high-performance flow sensor with unprecedented low power consumption and
potential for wireless operation.
previous artificial cilia sensors, no additional magnetic field is required to
magnetize the nanocomposite or bias the sensor, which simplifies
miniaturization and integration in microsystems. There are also no limitations
with respect to the fluid; gases as well as liquids can be measured without
Lab on a Chip is
a peer reviewed journal reporting breakthrough work related to micro- and
nano-scale devices across a variety of disciplines including: chemistry,
biology, bioengineering, physics, electronics, clinical/medical science,
chemical engineering and materials science.
Ahmed Alfadhel is
currently a PhD candidate in Electrical Engineering at the Sensing, Magnetism
and Microsystems (SMM) research group in KAUST under the supervision of Prof.
Jürgen Kosel. He received his B.S. degree in Electrical Engineering from
Rochester Institute of Technology, US in 2010 and his M.S. degree in Electrical
Engineering from King Abdullah University of Science and Technology (KAUST),
Saudi Arabia in 2012. His
research interests are in the development of magnetic micro- and nano-systems
and sensors. He has filed a provisional patent and authored 7 journal papers
and international conference presentations (including 1 invited talk).
This project has
been enabled by the multidisciplinary laboratory environment provided at KAUST,
enabling nanofabrication and characterization of nanowires, microfabrication of
artificial cilia and GMI sensors, fluidic system fabrication for testing, RF
measurement of the GMI sensor and finite element modeling for the design. We
would like to acknowledge the members of the SMM lab, the thin film core lab
and the nanofabrication and characterization core lab, who helped realizing
Concept of the
magnetic nanocomposite artificial cilia sensor together with fabricated devices
and flow measurement results*.
A. Alfadhel, B. Li, A. Zaher, O. Yassine, and J. Kosel, Lab Chip,
Reproduced by permission of The
Royal Society of Chemistry.