A flexible tactile sensor using seedless hydrothermal growth of ZnO nanorods on fabrics

Hong, Gwang-Wook; Kim, Jihyun; Lee, Jun-Soo; Shin, Kyeongho; Jung, Dongsoo; Kim, Do Kyung

doi:10.1088/2399-6528/ab82b6

Cited by 10 publications

(5 citation statements)

References 30 publications

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“…In the field of tactile sensing, various chemical and physical methods are employed for their preparation 100–103 . However, hydrothermal growth is the most advantageous method among these processing technologies, because it is suitable for growth on different substrates and can also construct complex hierarchical structures, which creates conditions for further performance optimization 104,105 . Currently, semiconductor materials based on hydrothermal growth are involved in all four types of tactile sensors, among which piezocapacitive and piezoelectric are the most typical.…”

Section: Structural Materialsmentioning

confidence: 99%

Advances in advanced solution‐synthesis‐based structural materials for tactile sensors and their intelligent applications

Niu,

Li,

Kim

et al. 2023

InfoMat

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Intelligent applications, with tactile sensors at their core, represent significant advancement in the field of artificial intelligence. However, achieving perception abilities in tactile sensors that match or exceed human skin remains a formidable challenge. Consequently, the design and implementation of hierarchical structural materials are considered the optimal solution to this challenge. In contrast to conventional methods, such as complicated lithography and three‐dimensional printing, the cost‐effective and scalable nature of advanced solution‐synthesis methods makes them ideal for preparing diverse tactile sensors with hierarchical structural materials. However, the process and applicability of advanced solution synthesis methods have yet to form a seamless system. Accordingly, the development and intellectualization of tactile sensors based on advanced solution synthesis methods are still in their early stages, and require a comprehensive and systematic review to usher in progress. This study delves into the advantages and disadvantages of various advanced solution synthesis methods, providing detailed insights. Furthermore, the positive effects of hierarchical structural materials constructed using these methods in tactile sensors and their intelligent applications are also discussed in depth. Finally, the challenges and future opportunities faced by this emerging field are summarized.image

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Section: Structural Materialsmentioning

confidence: 99%

Advances in advanced solution‐synthesis‐based structural materials for tactile sensors and their intelligent applications

Niu,

Li,

Kim

et al. 2023

InfoMat

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“…Except for the micro/nanofiber fabricating techniques introduced above, many other techniques, such as lithography, spin-coating, hydrothermal, and PVD/CVD, were also commonly used for fabricating wearable sensors, as reported in previous works [102,104,[131][132][133]. However, these techniques are usually not compatible with micro/nanofiber fabrication for different reasons.…”

Section: Other Techniquesmentioning

confidence: 99%

Micro/nanofiber fabrication technologies for wearable sensors: a review

Ma¹,

Wang²,

Zhu³

et al. 2022

J. Micromech. Microeng.

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The demand for wearable sensors is vastly growing as it provides people the ability to monitor their daily activities, surrounding environment, and health conditions conveniently. The development of these sophisticated wearable sensors with specific- or multiple-function capacity largely depends on the innovation pace of fabrication technologies. This review focuses on the most recent development of micro/nanofiber fabrication technologies for fabricating wearable sensors, including drawing, spinning, coating, and printing. The basic working mechanisms are introduced, followed by some representative applications. Lastly, the perspectives of these advanced methods on the development of future wearable sensors are discussed.

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“…Piezoelectricity is an electromechanical process in which an electric dipole is generated due to the deformation of the piezoelectric material by applying a mechanical force or pressure. There are various piezoelectric materials such as quartz [6], aluminum nitride [7], lead zirconate titanate (PZT) [8], and wurtzite zinc oxide (ZnO) [9][10][11], that play an important and key role in the functions of tactile sensors and energy harvesters. Among these piezoelectric materials, ZnO has shown great potential due to its biocompatibility and easy synthesis in nano-structural forms and combined with properties like wide and direct bandgap 3.4 eV and large exciton binding energy of 60 meV, it can be utilized in many other applications [12].…”

Section: Introductionmentioning

confidence: 99%

Simulation study of ZnO nanorod geometry for the development of high-performance tactile sensors and energy harvesting devices

Ahmed,

Kumar

2024

Phys. Scr.

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ZnO exhibits an excellent piezoelectric response and can transduce mechanical energy into electrical signals by applying pressure. In particular, vertically aligned ZnO nanorods were thought to be of great importance because of their higher value of piezoelectric coefficient along the z-direction. In this study, various geometries of ZnO nanorods are explored and their effect on the strength of piezoelectric output potential is simulated using COMSOL Multiphysics software. The simulation results show that out of many geometries and inclinations of ZnO nanorods, the highest piezoelectric output is demonstrated by the inclined ZnO nanorods due to the application of higher torque force or shear stress in similar applied force. The high torque force or shear stress at 60⁰ orientation and optimized contributions from all the piezoelectric coefficients resulted in a high piezoelectric output potential close to 215 mV which is much higher than the vertically aligned ZnO nanorod which is approximately 25 mV.

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A flexible tactile sensor using seedless hydrothermal growth of ZnO nanorods on fabrics

Cited by 10 publications

References 30 publications

Advances in advanced solution‐synthesis‐based structural materials for tactile sensors and their intelligent applications

Advances in advanced solution‐synthesis‐based structural materials for tactile sensors and their intelligent applications

Micro/nanofiber fabrication technologies for wearable sensors: a review

Simulation study of ZnO nanorod geometry for the development of high-performance tactile sensors and energy harvesting devices

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