A magnetoresistive tactile sensor for harsh environment applications

07/05/2016

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.

Autores da comunidade :

• 

  S

  Susana Isabel Pinheiro Cardoso de Freitas

  ist14366

  Afiliações e fontes

  IST > INESC-MN

  Instituto de Engenharia de Sistemas e Computadores - Microssistemas e Nanotecnologias

  IST > DF

  Departamento de Física

  De: orcid

  ID: 24088232

VoR - Versão publicada

MDPI AG

https://www.mdpi.com/1424-8220/16/5/650

Sensors

650

16

5

1424-8220

10.3390/s16050650

physical-sciences - Física

Palavras-chave

• Electrical and Electronic Engineering
• Biochemistry
• Instrumentation
• Atomic and Molecular Physics, and Optics
• Analytical Chemistry

eng - Inglês