Vibrational and acoustic studies of bending mode piezoelectricity in millimeter-size polyvinylidene fluoride cantilevers

Mukherjee, Niloy; Shukla, Amit; Dwivedi, Arpit; Roseman, R.D.; Thompson, David F.

doi:10.1117/12.484443

Cited by 3 publications

(6 citation statements)

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“…The first goal of this research was the production of ceramic/polymer composite fibers to increase the material piezoelectricity. Ceramic/polymer composites can increase the piezoelectric coefficients of transducers [10][11][12]. Moreover, nanostructured materials, such as aligned ultrafine fibers, can modulate neural cell activity by promoting cell/interface contact and therefore increasing the device performance [34].…”

Section: Production Morphology and Topography Of Btnp/pvdf Fibersmentioning

confidence: 99%

“…Piezoelectric materials have recently been explored in diverse fields, including biomedicine and energy harvesting [8,9]. The development of novel CIs evolving towards the utilization of piezoelectric materials was firstly suggested by Mukherjee et al at the beginning of this century [10][11][12]. Unlike conventional CIs, piezoelectric CIs are not ferromagnetic and exploit the cochlear constitutive mechanical tonotopy (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Design, fabrication and characterization of composite piezoelectric ultrafine fibers for cochlear stimulation

et al. 2017

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Section: Production Morphology and Topography Of Btnp/pvdf Fibersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design, fabrication and characterization of composite piezoelectric ultrafine fibers for cochlear stimulation

et al. 2017

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“…A voltage response of more than 1 mV is estimated from all cantilevers operating under the average intra-cochlear pressure conditions. Polyvinylidene fluoride (PVF2) offers the highest sensitivity of piezoelectric bendin amongst other organic piezoelectric polymers [59]. Mukherjee et al have developed PVF cantilevers with nickel (Ni) and copper (Cu) as the electrodes [59].…”

Section: Organic Piezoelectricmentioning

confidence: 99%

“…Inaoka et al adopted PVDF and P(VDF-TrFE) membranes to mimic the function o Polyvinylidene fluoride (PVF 2 ) offers the highest sensitivity of piezoelectric bending amongst other organic piezoelectric polymers [59]. Mukherjee et al have developed PVF 2 cantilevers with nickel (Ni) and copper (Cu) as the electrodes [59]. PVF 2 is stretched 300% to attain its piezoelectric β phase characteristics.…”

Section: Organic Piezoelectricmentioning

confidence: 99%

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Mechanical Energy Sensing and Harvesting in Micromachined Polymer-Based Piezoelectric Transducers for Fully Implanted Hearing Systems: A Review

et al. 2021

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The paper presents a comprehensive review of mechanical energy harvesters and microphone sensors for totally implanted hearing systems. The studies on hearing mechanisms, hearing losses and hearing solutions are first introduced to bring to light the necessity of creating and integrating the in vivo energy harvester and implantable microphone into a single chip. The in vivo energy harvester can continuously harness energy from the biomechanical motion of the internal organs. The implantable microphone executes mechanoelectrical transduction, and an array of such structures can filter sound frequency directly without an analogue-to-digital converter. The revision of the available transduction mechanisms, device configuration structures and piezoelectric material characteristics reveals the advantage of adopting the polymer-based piezoelectric transducers. A dual function of sensing the sound signal and simultaneously harvesting vibration energy to power up its system can be attained from a single transducer. Advanced process technology incorporates polymers into piezoelectric materials, initiating the invention of a self-powered and flexible transducer that is compatible with the human body, magnetic resonance imaging system (MRI) and the standard complementary metal-oxide-semiconductor (CMOS) processes. The polymer-based piezoelectric is a promising material that satisfies many of the requirements for obtaining high performance implantable microphones and in vivo piezoelectric energy harvesters.

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Developing an active artificial hair cell using nonlinear feedback control

Joyce

Tarazaga

2015

Smart Mater. Struct.

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The hair cells in the mammalian cochlea convert sound-induced vibrations into electrical signals. These cells have inspired a variety of artificial hair cells (AHCs) to serve as biologically inspired sound, fluid flow, and acceleration sensors and could one day replace damaged hair cells in humans. Most of these AHCs rely on passive transduction of stimulus while it is known that the biological cochlea employs active processes to amplify sound-induced vibrations and improve sound detection. In this work, an active AHC mimics the active, nonlinear behavior of the cochlea. The AHC consists of a piezoelectric bimorph beam subjected to a base excitation. A feedback control law is used to reduce the linear damping of the beam and introduce a cubic damping term which gives the AHC the desired nonlinear behavior. Model and experimental results show the AHC amplifies the response due to small base accelerations, has a higher frequency sensitivity than the passive system, and exhibits a compressive nonlinearity like that of the mammalian cochlea. This bio-inspired accelerometer could lead to new sensors with lower thresholds of detection, improved frequency sensitivities, and wider dynamic ranges.

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Vibrational and acoustic studies of bending mode piezoelectricity in millimeter-size polyvinylidene fluoride cantilevers

Cited by 3 publications

References 0 publications

Design, fabrication and characterization of composite piezoelectric ultrafine fibers for cochlear stimulation

Design, fabrication and characterization of composite piezoelectric ultrafine fibers for cochlear stimulation

Mechanical Energy Sensing and Harvesting in Micromachined Polymer-Based Piezoelectric Transducers for Fully Implanted Hearing Systems: A Review

Developing an active artificial hair cell using nonlinear feedback control

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