A stretchable strain sensor based on a metal nanoparticle thin film for human motion detection.

Wearable strain sensors for human motion detection are being highlighted in various fields such as medical, entertainment and sports industry. In this paper, we propose a new type of stretchable strain sensor that can detect both tensile and compressive strains and can be fabricated by a very simple process. A silver nanoparticle (Ag NP) thin film patterned on the polydimethylsiloxane (PDMS) stamp by a single-step direct transfer process is used as the strain sensing material. The working principle is the change in the electrical resistance caused by the opening/closure of micro-cracks under mechanical deformation. The fabricated stretchable strain sensor shows highly sensitive and durable sensing performances in various tensile/compressive strains, long-term cyclic loading and relaxation tests. We demonstrate the applications of our stretchable strain sensors such as flexible pressure sensors and wearable human motion detection devices with high sensitivity, response speed and mechanical robustness.

[1]  D. Koss,et al.  Porosity and crack initiation during low cycle fatigue , 1990 .

[2]  Ray W. Ogden,et al.  A constitutive model for the Mullins effect with permanent set in particle-reinforced rubber , 2004 .

[3]  Christopher S. Chen,et al.  High‐Conductivity Elastomeric Electronics , 2004 .

[4]  Hiroyuki Kudo,et al.  A flexible and wearable glucose sensor based on functional polymers with soft-MEMS techniques. , 2006, Biosensors & bioelectronics.

[5]  Sigurd Wagner,et al.  Mechanisms of reversible stretchability of thin metal films on elastomeric substrates , 2006 .

[6]  Elastomeric carbon nanotube circuits for local strain sensing , 2006, cond-mat/0606463.

[7]  G. Tröster,et al.  Sensor for Measuring Strain in Textile , 2008, Sensors.

[8]  Hiroyuki Kudo,et al.  Flexible humidity sensor in a sandwich configuration with a hydrophilic porous membrane , 2009 .

[9]  Jin-Woo Choi,et al.  Patterning conductive PDMS nanocomposite in an elastomer using microcontact printing , 2009 .

[10]  Stéphanie P. Lacour,et al.  Extended cyclic uniaxial loading of stretchable gold thin-films on elastomeric substrates , 2009 .

[11]  Lori Shutter,et al.  Dual-mode operation of flexible piezoelectric polymer diaphragm for intracranial pressure measurement , 2010 .

[12]  Damian Farrow,et al.  Can interactive textiles influence a novice’s throwing technique? , 2010 .

[13]  Brian L. Wardle,et al.  Nanocomposite Flexible Pressure Sensor for Biomedical Applications , 2011 .

[14]  Brian L. Wardle,et al.  Flexible sensor for blood pressure measurement , 2011, 2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[15]  Benjamin C. K. Tee,et al.  Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes. , 2011, Nature nanotechnology.

[16]  Young-Ju Kim,et al.  Preparation of piezoresistive nano smart hybrid material based on graphene , 2011 .

[17]  K. Hata,et al.  A stretchable carbon nanotube strain sensor for human-motion detection. , 2011, Nature nanotechnology.

[18]  Damian Farrow,et al.  A pilot evaluation of an electronic textile for lower limb monitoring and interactive biofeedback , 2011 .

[19]  Jun Zhou,et al.  High‐Strain Sensors Based on ZnO Nanowire/Polystyrene Hybridized Flexible Films , 2011, Advanced materials.

[20]  Silvana Quaglini,et al.  Estimation of human trunk movements by wearable strain sensors and improvement of sensor’s placement on intelligent biomedical clothes , 2012, Biomedical engineering online.

[21]  T. Itoh,et al.  Fabric pressure sensor array fabricated with die-coating and weaving techniques , 2012 .

[22]  Dermot Diamond,et al.  Real-time sweat pH monitoring based on a wearable chemical barcode micro-fluidic platform incorporating ionic liquids , 2012 .

[23]  S. Wagner,et al.  Size-Dependent Rupture Strain of Elastically Stretchable Metal Conductors. , 2012, Scripta materialia.

[24]  Keon Jae Lee,et al.  Bendable inorganic thin-film battery for fully flexible electronic systems. , 2012, Nano letters.

[25]  I. Park,et al.  Direct micro/nano metal patterning based on two-step transfer printing of ionic metal nano-ink , 2012, Nanotechnology.

[26]  P. Irazoqui,et al.  Polymer-based miniature flexible capacitive pressure sensor for intraocular pressure (IOP) monitoring inside a mouse eye , 2011, Biomedical Microdevices.

[27]  Yonggang Huang,et al.  Silicon nanomembranes for fingertip electronics , 2012, Nanotechnology.

[28]  Yong Zhu,et al.  Wavy Ribbons of Carbon Nanotubes for Stretchable Conductors , 2012 .

[29]  A Flexible Underwater Pressure Sensor Array Using a Conductive Elastomer Strain Gauge , 2012, Journal of Microelectromechanical Systems.

[30]  Kinam Kim,et al.  Highly stretchable electric circuits from a composite material of silver nanoparticles and elastomeric fibres. , 2012, Nature nanotechnology.

[31]  I. Park,et al.  Tensile characteristics of metal nanoparticle films on flexible polymer substrates for printed electronics applications , 2013, Nanotechnology.

[32]  A. Drozdov,et al.  Multi-cycle deformation of silicone elastomer: observations and constitutive modeling with finite strains , 2013 .