Title :
Magnetic polymer nanocomposites for sensing applications
Author :
Alfadhel, A. ; Li, B. ; Kosel, J.
Author_Institution :
Electr. & Math. Sci. & Eng. Div. (CEMSE), King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia
Abstract :
We report the fabrication and characterization of magnetic polymer nanocomposites for a wide range of sensing applications. The composites are made of magnetic nanowires (NWs) incorporated into polymers such as polydimethylsiloxane (PDMS) or UV sensitive SU-8. The developed composites utilize the permanent magnetic behavior of the NWs, allowing remote operation without an additional magnetic field to magnetize the NWs, which simplifies miniaturization and integration in microsystems. In addition, the nanocomposite benefits from the easy patterning of the polymer leading to a corrosion resistant, highly elastic, and permanent magnetic material that can be used to develop highly sensitive systems. Nanocomposite pillars are realized and integrated on magnetic sensor elements to achieve highly sensitive and power efficient flow and tactile sensors. The developed flow sensor can detect air and water flow at a power consumption as little as 80 nW and a resolution up to 15 μm/s with easily modifiable performance. A tactile sensor element prototype is realized using the same concept, where a pressure range of 0-169 kPa is detected with a resolution of up to 1.3 kPa.
Keywords :
flow sensors; magnetic sensors; nanocomposites; nanofabrication; nanomagnetics; nanosensors; nanowires; permanent magnets; polymers; tactile sensors; UV sensitive SU-8; air flow; corrosion resistant material; easily modifiable performance; easy polymer patterning; flow sensor; highly elastic material; highly sensitive systems; magnetic nanowires; magnetic polymer nanocomposites; magnetic sensor elements; microsystems; nanocomposite pillars; permanent magnetic behavior; polydimethylsiloxane; power 80 nW; power consumption; pressure 6 kPa to 169 kPa; remote operation; sensing applications; tactile sensor element prototype; water flow; Iron; Magnetoelasticity; Robot sensing systems; Silicon; Substrates; Cilia; Flow sensor; Magnetic; Microfabrication; Nanocomposite; Nanowires; Polymer; Tactile sensor;
Conference_Titel :
SENSORS, 2014 IEEE
Conference_Location :
Valencia
DOI :
10.1109/ICSENS.2014.6985442