Patterning piezoelectric thin film PVDF–TrFE based pressure sensor for catheter application

Sharma, Tushar; Je, Sang Soo; Gill, Brijesh S.; Zhang, John X. J.

doi:10.1016/j.sna.2011.08.019

Cited by 273 publications

(199 citation statements)

References 11 publications

Supporting

Mentioning

178

Contrasting

Unclassified

Order By: Relevance

“…An electric charge proportional to the applied pressure is generated when a piezoelectric material is stressed when coupled to an appropriate pressuresumming device. Piezoelectric materials normally used for pressure sensors include PbTiO 3 , [ 49,106 ] BaTiO 3 , [ 107 ] PZT, [ 7 ] ZnO, [ 50,93 ] polypropylene (PP), [ 108 ] PVDF, [ 50 ] and P(VDFTrFE) [ 46,47,49,77,91,106,107,109,110 ] etc. For the development of a fl exible piezoelectric pressure sensor, P(VDF-TrFE) is a candidate material in terms of its fl exibility and the ease of the fabrication process.…”

Section: Piezoelectric Pressure Sensorsmentioning

confidence: 99%

Flexible and Stretchable Physical Sensor Integrated Platforms for Wearable Human‐Activity Monitoringand Personal Healthcare

2016

View full text Add to dashboard Cite

Flexible and stretchable physical sensors that can measure and quantify electrical signals generated by human activities are attracting a great deal of attention as they have unique characteristics, such as ultrathinness, low modulus, light weight, high flexibility, and stretchability. These flexible and stretchable physical sensors conformally attached on the surface of organs or skin can provide a new opportunity for human-activity monitoring and personal healthcare. Consequently, in recent years there has been considerable research effort devoted to the development of flexible and stretchable physical sensors to fulfill the requirements of future technology, and much progress has been achieved. Here, the most recent developments of flexible and stretchable physical sensors are described, including temperature, pressure, and strain sensors, and flexible and stretchable sensor-integrated platforms. The latest successful examples of flexible and stretchable physical sensors for the detection of temperature, pressure, and strain, as well as their novel structures, technological innovations, and challenges, are reviewed first. In the next section, recent progress regarding sensor-integrated wearable platforms is overviewed in detail. Some of the latest achievements regarding self-powered sensor-integrated wearable platform technologies are also reviewed. Further research direction and challenges are also proposed to develop a fully sensor-integrated wearable platform for monitoring human activity and personal healthcare in the near future.

show abstract

Section: Piezoelectric Pressure Sensorsmentioning

confidence: 99%

Flexible and Stretchable Physical Sensor Integrated Platforms for Wearable Human‐Activity Monitoringand Personal Healthcare

2016

View full text Add to dashboard Cite

show abstract

“…Their carbon-fluorine chemistry renders them highly resistant to solvents, acids and bases. A disadvantage is that achieving good performance (BkPa sensitivity) requires electrical poling to create maximum polarization in the direction orthogonal to the film plane 20,21 . This process constrains engineering design options and, at the same time, requires multiple preparatory steps.…”

mentioning

confidence: 99%

High performance piezoelectric devices based on aligned arrays of nanofibers of poly(vinylidenefluoride-co-trifluoroethylene)

et al. 2013

View full text Add to dashboard Cite

Multifunctional capability, flexible design, rugged lightweight construction and self-powered operation are desired attributes for electronics that directly interface with the human body or with advanced robotic systems. For these applications, piezoelectric materials, in forms that offer the ability to bend and stretch, are attractive for pressure/force sensors and mechanical energy harvesters. Here, we introduce a large area, flexible piezoelectric material that consists of sheets of electrospun fibres of the polymer poly(vinylidenefluoride-co-trifluoroethylene). The flow and mechanical conditions associated with the spinning process yield free-standing, three-dimensional architectures of aligned arrangements of such fibres, in which the polymer chains adopt strongly preferential orientations. The resulting material offers exceptional piezoelectric characteristics, to enable ultra-high sensitivity for measuring pressure, even at exceptionally small values (0.1 Pa). Quantitative analysis provides detailed insights into the pressure sensing mechanisms, and establishes engineering design rules. Potential applications range from self-powered micro-mechanical elements, to self-balancing robots and sensitive impact detectors.

show abstract

“…The key to gel deposited PVDF is to have it solidify into the β phase, which is the most piezoelectric and ferroelectric form of the other five known crystalline phases α, β, γ, δ, and ɛ [3], [130]. Usually well-funded researchers will purchase a co-polymer like P(VDFTrFE) to mix with solvents [130], which almost always forms β-phase PVDF due to the highly polarizablility nature of VDF with a small amount of TrFe mixed in [70].…”

Section: E Pvdf Fabrication Routinesmentioning

confidence: 99%

“…Usually well-funded researchers will purchase a co-polymer like P(VDFTrFE) to mix with solvents [130], which almost always forms β-phase PVDF due to the highly polarizablility nature of VDF with a small amount of TrFe mixed in [70]. These copolymers ($80/gram) usually cost a lot of money [27] so it was believed to be beneficial to investigate the possibility of applying homo-polymer ($5/gram) gels which are very inexpensive to make.…”

Section: E Pvdf Fabrication Routinesmentioning

confidence: 99%

See 1 more Smart Citation

Bi-stable buckled energy harvesters actuated via torque arms.

Porter¹

View full text Add to dashboard Cite

ACKNOWLEDGMENTSMuch thanks to my advisor, Dr. Berfield, for giving me direction and an opportunity to achieve something I never thought I could have in this life. The gift of confidence, knowledge, and teamwork will serve me well. I wish him the best.I would like to thank my mother, father, sister, and brother for their love and support throughout this long endeavor. Knowing I have a loving family who encouraged me to grasp the best life has to offer keeps my resolve strong and my potential limitless.Thanks to my friends, Kyle Hord, Trung Hoang, Russel Prater, Andrew Work, and Tim Broering who kept me sane during long and rigorous work hours, they are of great importance and may never know how greatly needed they were and are.Lastly I would like to thank the Mechanical Engineering Department which through the long years has granted me the know-how to solve problems in the field of mechanical engineering. Problem solving is a feat no one should live without.Most men and women struggle all their lives for fame or money… mine was and always will be knowledge. This dissertation investigates a novel method of actuating the primary buckled energy harvesting structure using torque arms as a force amplification mechanism.Buckled structures can exhibit snap-through and has the potential to broaden the operating frequency for the VEH. Macro and MEMS size prototypes are fabricated and evaluated via a custom made shaker table. The effect of compliance arms, which pin the center beam with piezoelectric strips, are also evaluated along with damping ratios. ANSYS models evaluating generated power are created for use in future optimization studies. Lastly, high energy orbitals (HEO) are observed in the devices.Results show that buckling lowers and broadens the output power of the new devices. Reverse sweeps drastically increase the operating frequency during snap-through.Rectangular compliance arms made of poly-lactic acid (PLA) generated the most power of all compliance arms tested. HEO performance can be induced by perturbing the system while maintaining the same input force which increases power output.

show abstract

Patterning piezoelectric thin film PVDF–TrFE based pressure sensor for catheter application

Cited by 273 publications

References 11 publications

Flexible and Stretchable Physical Sensor Integrated Platforms for Wearable Human‐Activity Monitoringand Personal Healthcare

Flexible and Stretchable Physical Sensor Integrated Platforms for Wearable Human‐Activity Monitoringand Personal Healthcare

High performance piezoelectric devices based on aligned arrays of nanofibers of poly(vinylidenefluoride-co-trifluoroethylene)

Bi-stable buckled energy harvesters actuated via torque arms.

Contact Info

Product

Resources

About