Next Article in Journal
Improved Reconstruction of Radio Holographic Signal for Forward Scatter Radar Imaging
Next Article in Special Issue
A Novel Attitude Estimation Algorithm Based on the Non-Orthogonal Magnetic Sensors
Previous Article in Journal
Frequency Optimization for Enhancement of Surface Defect Classification Using the Eddy Current Technique
Previous Article in Special Issue
Ultra-Compact 100 × 100 μm2 Footprint Hybrid Device with Spin-Valve Nanosensors
Open AccessArticle

A Magnetoresistive Tactile Sensor for Harsh Environment Applications

1
Computer, Electrical and Mathematical Sciences and Engineering Division (CEMSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
2
INESC-Microsystems and Nanotechnologies (INESC-MN), Rua Alves Redol, 9, Lisbon 1000-029, Portugal
3
Instituto Superior Técnico IST, Physics Department, Universidade de Lisboa, Lisbon 1049-001, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Andreas Hütten
Sensors 2016, 16(5), 650; https://doi.org/10.3390/s16050650
Received: 4 April 2016 / Revised: 30 April 2016 / Accepted: 3 May 2016 / Published: 7 May 2016
(This article belongs to the Special Issue Magnetoresistive Sensors under Extreme Conditions)
A magnetoresistive tactile sensor is reported, which is capable of working in high temperatures up to 140 °C. Hair-like bioinspired structures, known as cilia, made out of permanent magnetic nanocomposite material on top of spin-valve giant magnetoresistive (GMR) sensors are used for tactile sensing at high temperatures. The magnetic nanocomposite, consisting of iron nanowires incorporated into the polymer polydimethylsiloxane (PDMS), is very flexible, biocompatible, has high remanence, and is also resilient to antagonistic sensing ambient. When the cilia come in contact with a surface, they deflect in compliance with the surface topology. This yields a change of the GMR sensor signal, enabling the detection of extremely fine features. The spin-valve is covered with a passivation layer, which enables adequate performance in spite of harsh environmental conditions, as demonstrated in this paper for high temperature. View Full-Text
Keywords: magnetic nanocomposite; giant magnetoresistance; high temperature; harsh environment; nanowires; cilia; tactile sensor; spin-valve magnetic nanocomposite; giant magnetoresistance; high temperature; harsh environment; nanowires; cilia; tactile sensor; spin-valve
Show Figures

Graphical abstract

MDPI and ACS Style

Alfadhel, A.; Khan, M.A.; Cardoso, S.; Leitao, D.; Kosel, J. A Magnetoresistive Tactile Sensor for Harsh Environment Applications. Sensors 2016, 16, 650.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop