Bio-inspired piezoelectric artificial hair cell sensor fabricated by powder injection molding

Han, Ji-Sheng; Oh, Keun Ha; Moon, Won; Kim, Kyungseop; Joh, Cheeyoung; Seo, Hee Seon; Bollina, Ravi; Park, Seong Jin

doi:10.1088/0964-1726/24/12/125025

Cited by 16 publications

(5 citation statements)

References 23 publications

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“…This renders mechanosensitive hairs as a potentially excellent candidate for vibration sensors. One strategy using the degree of deflection in hairs is the electrical responses of resistive materials, such as carbon nanotube (CNT) hairs, piezoelectric wires, polymer nanoarrays, silicon wires, and magnetic microwires . Mechanical stiffness is controlled by dimensions, allowing tunable sensing ranges and sensitivity .…”

Section: Auditory Sensory System‐inspired Electronicsmentioning

confidence: 99%

Bioinspired Electronics for Artificial Sensory Systems

et al. 2018

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Humans have a myriad of sensory receptors in different sense organs that form the five traditionally recognized senses of sight, hearing, smell, taste, and touch. These receptors detect diverse stimuli originating from the world and turn them into brain‐interpretable electrical impulses for sensory cognitive processing, enabling us to communicate and socialize. Developments in biologically inspired electronics have led to the demonstration of a wide range of electronic sensors in all five traditional categories, with the potential to impact a broad spectrum of applications. Here, recent advances in bioinspired electronics that can function as potential artificial sensory systems, including prosthesis and humanoid robots are reviewed. The mechanisms and demonstrations in mimicking biological sensory systems are individually discussed and the remaining future challenges that must be solved for their versatile use are analyzed. Recent progress in bioinspired electronic sensors shows that the five traditional senses are successfully mimicked using novel electronic components and the performance regarding sensitivity, selectivity, and accuracy have improved to levels that outperform human sensory organs. Finally, neural interfacing techniques for connecting artificial sensors to the brain are discussed.

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Section: Auditory Sensory System‐inspired Electronicsmentioning

confidence: 99%

Bioinspired Electronics for Artificial Sensory Systems

et al. 2018

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“…For a solvent debinding process, specimens were immersed in 45 °C n-hexane for 12 h. After solvent debinding, specimens were heated to thermal debinding temperature. Under optimized conditions in our previous works for debinding optimization [9], PP and PE were completely removed. Last step is the sintering of PZT ceramics.…”

Section: Pim Process For Micro Pzt Rod Arraymentioning

confidence: 99%

“…Innovative applications which was impossible to fabricate in previous manufacturing technology can be fabricated. Three-dimensional curved structure can be commercialized under convergence of production and acoustic design [9].…”

Section: Introductionmentioning

confidence: 99%

Powder injection molding process for fabrication of piezoelectric 2D array ultrasound transducer

Han

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Park

et al. 2018

Smart Mater. Struct.

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Powder injection molding process has been developed for a cost-effective fabrication of micro PZT array in diagnostic 2D array ultrasound transducer. The developed process consists six main steps; mold insert fabrication, mixing of powder and binder, injection molding, demolding of sacrificial mold insert, solvent and thermal debinding, densification of PZT ceramics. 1–3 type PZT/polymer composite fabricated by developed process shows 0.67 of electromechanical coupling property in plain mode and 0.56 in rod array mode which are 99% and 96% of reference property. Based on high productivity and shape complexity of ceramic injection molding, micro-manufacturing process for micro-scale PZT transducer has been demonstrated with according piezoelectric performance characterization.

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“…Also, complex structures can be manufactured with the benefits from fast developed micro-nano machining technology. Hence, advanced piezoelectric materials combined with advanced design methodology can ensure broad potential applications of hairlike sensors in acoustic [17,18], tactile [11] and flow [31][32][33][34][35][36][37] detection. For low-frequency acoustic and fluidic signals, the sensitivity of polyester (vinylidene fluoride) nanofiber webs can reach up to 266 mV Pa −1 [14].…”

Section: Introductionmentioning

confidence: 99%

Configuration optimization of bionic piezoelectric hair sensor for acoustic/tactile detection

et al. 2020

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Specialized sensory hairs are important biological sensors for arthropods to detect and recognize environmental conditions including acoustic, pressure and airflow signals. However, the present design methodology of such biomimic micro devices are mainly depending on shape mimicking, which greatly restricts their performance. In this paper, a novel genetic algorithm based optimization model for design of piezoelectric functional hair is developed for improving its acoustic pressure or tactile sensitivity. Furthermore, the sensing mechanism of axially polarized piezoelectric hair is explored and the main influencing factors on sensitivity including hair configuration and axial strain distribution are determined. Then, a series of optimized hair configurations are obtained in a specific frequency band from 1 Hz to 500 Hz, whose average sensitivity of 2.21 × 10 −3 V Pa −1 is 10 times greater than that of the straight hair of 2.15 × 10 −4 V Pa −1 with the same size. For tactile load detection, the output voltage of the optimized hair is about 1.5 times as much as that of the straight hair. The obtained hairs are similar with the spider's trichobothria and tactile hair, which presents an explanation of biological hairs sensitive to dynamic and static loads.

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Bio-inspired piezoelectric artificial hair cell sensor fabricated by powder injection molding

Cited by 16 publications

References 23 publications

Bioinspired Electronics for Artificial Sensory Systems

Bioinspired Electronics for Artificial Sensory Systems

Powder injection molding process for fabrication of piezoelectric 2D array ultrasound transducer

Configuration optimization of bionic piezoelectric hair sensor for acoustic/tactile detection

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