A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer

A flexible, anisotropic and portable stress sensor (logarithmic reversible response between 40-350 kPa) was fabricated, in which i) the sensing material, ii) the electrical contacts and iii) the encapsulating material, were based on polydimethylsiloxane (PDMS) composites. The sensing material is a s...

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Autores principales:	Mietta, J.L., Jorge, G., Martín Negri, R.
Formato:	JOUR
Materias:	electrically conductive composite flexible stress sensor piezoresistivity structured magnetoelastomer composites Anisotropy Electric conductivity Electric contacts Metals Microchannels Needles Sensors Silicones Stress measurement Electrically conductive composites Magnetoresistance effects Magnetorheological elastomers Piezoresistivity Polydimethylsiloxane PDMS Stress sensor Superparamagnetic nanoparticles Uniform magnetic fields Silver
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_09641726_v23_n8_p_Mietta
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_09641726_v23_n8_p_Mietta
record_format	dspace
spelling	todo:paper_09641726_v23_n8_p_Mietta2023-10-03T15:54:47Z A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer Mietta, J.L. Jorge, G. Martín Negri, R. electrically conductive composite flexible stress sensor piezoresistivity structured magnetoelastomer composites Anisotropy Electric conductivity Electric contacts Metals Microchannels Needles Sensors Silicones Stress measurement Electrically conductive composites Magnetoresistance effects Magnetorheological elastomers Piezoresistivity Polydimethylsiloxane PDMS Stress sensor Superparamagnetic nanoparticles Uniform magnetic fields Silver A flexible, anisotropic and portable stress sensor (logarithmic reversible response between 40-350 kPa) was fabricated, in which i) the sensing material, ii) the electrical contacts and iii) the encapsulating material, were based on polydimethylsiloxane (PDMS) composites. The sensing material is a slide of an anisotropic magnetorheological elastomer (MRE), formed by dispersing silver-covered magnetite particles (Fe 3 O 4 @Ag) in PDMS and by curing in the presence of a uniform magnetic field. Thus, the MRE is a structure of electrically conducting pseudo-chains (needles) aligned in a specific direction, in which electrical conductivity increases when stress is exclusively applied in the direction of the needles. Electrical conductivity appears only between contact points that face each other at both sides of the MRE slide. An array of electrical contacts was implemented based on PDMS-silver paint metallic composites. The array was encapsulated with PDMS. Using Fe 3 O 4 superparamagnetic nanoparticles also opens up possibilities for a magnetic field sensor, due to the magnetoresistance effects. © 2014 IOP Publishing Ltd. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09641726_v23_n8_p_Mietta
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	electrically conductive composite flexible stress sensor piezoresistivity structured magnetoelastomer composites Anisotropy Electric conductivity Electric contacts Metals Microchannels Needles Sensors Silicones Stress measurement Electrically conductive composites Magnetoresistance effects Magnetorheological elastomers Piezoresistivity Polydimethylsiloxane PDMS Stress sensor Superparamagnetic nanoparticles Uniform magnetic fields Silver
spellingShingle	electrically conductive composite flexible stress sensor piezoresistivity structured magnetoelastomer composites Anisotropy Electric conductivity Electric contacts Metals Microchannels Needles Sensors Silicones Stress measurement Electrically conductive composites Magnetoresistance effects Magnetorheological elastomers Piezoresistivity Polydimethylsiloxane PDMS Stress sensor Superparamagnetic nanoparticles Uniform magnetic fields Silver Mietta, J.L. Jorge, G. Martín Negri, R. A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer
topic_facet	electrically conductive composite flexible stress sensor piezoresistivity structured magnetoelastomer composites Anisotropy Electric conductivity Electric contacts Metals Microchannels Needles Sensors Silicones Stress measurement Electrically conductive composites Magnetoresistance effects Magnetorheological elastomers Piezoresistivity Polydimethylsiloxane PDMS Stress sensor Superparamagnetic nanoparticles Uniform magnetic fields Silver
description	A flexible, anisotropic and portable stress sensor (logarithmic reversible response between 40-350 kPa) was fabricated, in which i) the sensing material, ii) the electrical contacts and iii) the encapsulating material, were based on polydimethylsiloxane (PDMS) composites. The sensing material is a slide of an anisotropic magnetorheological elastomer (MRE), formed by dispersing silver-covered magnetite particles (Fe 3 O 4 @Ag) in PDMS and by curing in the presence of a uniform magnetic field. Thus, the MRE is a structure of electrically conducting pseudo-chains (needles) aligned in a specific direction, in which electrical conductivity increases when stress is exclusively applied in the direction of the needles. Electrical conductivity appears only between contact points that face each other at both sides of the MRE slide. An array of electrical contacts was implemented based on PDMS-silver paint metallic composites. The array was encapsulated with PDMS. Using Fe 3 O 4 superparamagnetic nanoparticles also opens up possibilities for a magnetic field sensor, due to the magnetoresistance effects. © 2014 IOP Publishing Ltd.
format	JOUR
author	Mietta, J.L. Jorge, G. Martín Negri, R.
author_facet	Mietta, J.L. Jorge, G. Martín Negri, R.
author_sort	Mietta, J.L.
title	A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer
title_short	A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer
title_full	A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer
title_fullStr	A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer
title_full_unstemmed	A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer
title_sort	flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer
url	http://hdl.handle.net/20.500.12110/paper_09641726_v23_n8_p_Mietta
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_version_	1807322711312039936

A flexible strain gauge exhibiting reversible piezoresistivity based on an anisotropic magnetorheological polymer

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