Zinc oxide nanostructure-based textile pressure sensor for wearable applications

Shirley, J. Abanah; Florence, S. Esther; Sreeja, B. S.; Padmalaya, G.; Radha, S.

doi:10.1007/s10854-020-04206-9

Cited by 24 publications

(14 citation statements)

References 49 publications

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“…The fact that considerable sharp absorption of ZnO implies that the nanoparticle dispersion is monodispersed [7]. The bandgap energy of the synthesized samples was computed by using the absorption edge relationship equation (8) [24][25][26][27].…”

Section: Resultsmentioning

confidence: 99%

“…This clearly shows that even without the application of a binder, the nanoparticles are strongly attached to the cloth surface. A binder, on the other hand, can be employed when a higher degree of wash fastness is necessary [14,16,[24][25][26][27]. As shown in Table 3, the UV protection parameter (UPF) and percent transmittances (%T) were determined using equations ( 9) and (10), respectively.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of Zinc Oxide Nanoparticles by Hydrothermal Methods and Spectroscopic Investigation of Ultraviolet Radiation Protective Properties

Bekele¹,

Jule²,

Degefa³

et al. 2021

Journal of Nanomaterials

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Ultraviolet radiation causes damages to the human body, such as skin ageing, skin cancer, and allergies throughout the world. Applying zinc oxide nanoparticles (ZnO NPs) in sunscreen products (like cloths or textiles) to protect human skin by absorbing the ultraviolet radiations that emerged from the sun. The main aim of this study is to investigate both absorbance and transmittance characteristics of the untreated and treated cotton textiles. For ZnO NPs using hydrothermal methods, they were made from Zn(NO3)2·6H2O and NaOH at a constant annealing temperature of 300°C. Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-vis spectroscopy were used to analyze the produced ZnO NPs. From the FT-IR result, ZnO NPs were observed in the region of 400-600 cm-1. Wurtzite hexagonal structure of ZnO NPs with the average crystal size 32 ± 49 nm was observed from XRD results. Flowers in the shape of synthesized ZnO NPs were observed from SEM images. The UV-vis penetration peaks were identified at 264 nm and 376 nm, with energy band gaps of 4.68 and 3.536 eV, respectively. When compared to bulk ZnO, the energy band gap of ZnO NPs was blue-shifted due to the impact of quantum confinement. The peaks in UV-vis absorption were caused by an electronic transition from the valiancy to the conduction bands. The high energy band shows high absorbance of the synthesis sample in the case of 264 nm. The ZnO NPs were manufactured and applied to 100% of raw cotton to impart sunscreen action to both untreated and treated cotton fabrics. The performance of treatment has been evaluated utilizing UV-vis spectroscopy through quantifying ultraviolet protective factors (UPF) and percentage of transmitted (%T) radiations. The treated cotton textiles have 61.50% UPF while 2.65% ultraviolet radiations were transmitted. In other words, untreated cotton textiles have 1.63% UPF while 74.56% ultraviolet radiation was transmitted. Therefore, the treated cotton textiles have excellent protection categories when compared to untreated cotton textiles.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synthesis of Zinc Oxide Nanoparticles by Hydrothermal Methods and Spectroscopic Investigation of Ultraviolet Radiation Protective Properties

Bekele¹,

Jule²,

Degefa³

et al. 2021

Journal of Nanomaterials

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“…fabricated ZnO nanostructure‐based textile‐based pressure sensor via hydrothermal route and attained a sensitivity value of 0.08 mV kPa –1 . [ 58 ] Liu et al. fabricated a flexible graphene‐silk fabric sensor by employing the dip‐coating technique and obtained a sensitivity value of 0.4 kPa –1 for applied 0–140 kPa pressure range.…”

Section: Resultsmentioning

confidence: 99%

MXene/TMD Nanohybrid for the Development of Smart Electronic Textiles Based on Physical Electromechanical Sensors

Adepu

Kamath

Siddhartha

et al. 2021

Adv Materials Inter

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Wearable technologies are becoming gradually prevalent as a personal health system, facilitating unceasing real‐time monitoring of human health on a regular basis and outside the clinical environments. In this perspective, an urgent requirement for extensively sensitive and wearable sensors has increased to examine health during life activities. The fabrication of Ti3C2Tx/SnSe2 nanohybrid E‐textile based multifunctional physical sensors (pressure, strain) on the cotton substrate to monitor an individual's health during daily activities is demonstrated here. The fabricated nanohybrid E‐textile based physical sensors display an extraordinary sensitivity of 14.959 kPa–1 in the applied pressure range of 1.477–3.456 kPa and a gauge factor of 14.108 for 5–25% of applied strain. In addition, these physical sensors show exceptional stability of ≈2500 cycles for a pressure sensor and ≈3000 cycles for a strain sensor which signifies the sturdiness of the sensor. Detailed underlying physics and transduction mechanism are explained by Schottky barrier and tunneling resistance mechanism. Further, an android/iOS/web‐based app is developed to validate wireless integration of the fabricated multifunctional physical sensors for demonstration toward smart shoe and crepe bandage applications.

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“…The performance evaluation of SnS/Ti 3 C 2 T x based nanohybrid-based electromechanical sensors with other reported physical sensors is tabulated in Table below. Shirley et al fabricated ZnO on the textile substrate by employing a hydrothermal route and later used it as a pressure sensor with a sensitivity value of 0.08 mV kPa –1 . Liu et al fabricated a flexible graphene-silk fabric sensor by utilizing the dip-coating method and acquired a sensitivity value of 0.4 kPa –1 .…”

Section: Demonstration Of Applicationsmentioning

confidence: 99%

SnS/Ti₃C₂T_x (MXene) Nanohybrid-Based Wearable Electromechanical Sensors for Sign-to-Text Translation and Sitting Posture Analysis

Adepu

Kunchur

Tathacharya

et al. 2022

ACS Appl. Electron. Mater.

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The challenges involved in realizing next-generation applications, like robotics, artificial electronic skin, noninvasive healthcare monitoring, motion detection, and so forth, enabled with wireless human-machine interfaces, present a growing need for high-performance flexible and wearable multifunctional electromechanical sensors. In this regard, emerging classes of two-dimensional nanomaterials and their hybrids show excellent promise as active sensing materials, given their high flexibility and remarkable sensitivity to external pressure and strain. This report is the first demonstration of SnS/Ti3C2T x nanohybrid-based electromechanical sensors for use in applications like sign-to-text translation and sitting posture analysis. The as-fabricated piezoresistive sensor exhibits a high gauge factor and sensitivity value, that is, 7.41 and 7.49 kPa–1, respectively. Furthermore, the nanohybrid-based sensor displayed a negligible change in performance over ∼3500 and ∼2500 cycles for both pressure and strain characterizations, indicating high robustness and exceptional stability. The underlying intrinsic piezoresistive mechanism in layered nanomaterials and the Ohmic contact formed at the SnS/Ti3C2T x heterojunction are explained in detail with the help of energy band diagrams wherein the work function and the E homo values are extracted experimentally by ultraviolet photoelectron spectroscopy for both SnS and Ti3C2T x . The successful demonstration of sign-to-text translation and e-cushion applications using SnS/Ti3C2T x nanohybrid-based piezoresistive sensors will further expand the scope of flexible and wearable electronics research.

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Zinc oxide nanostructure-based textile pressure sensor for wearable applications

Cited by 24 publications

References 49 publications

Synthesis of Zinc Oxide Nanoparticles by Hydrothermal Methods and Spectroscopic Investigation of Ultraviolet Radiation Protective Properties

Synthesis of Zinc Oxide Nanoparticles by Hydrothermal Methods and Spectroscopic Investigation of Ultraviolet Radiation Protective Properties

MXene/TMD Nanohybrid for the Development of Smart Electronic Textiles Based on Physical Electromechanical Sensors

SnS/Ti₃C₂T_x (MXene) Nanohybrid-Based Wearable Electromechanical Sensors for Sign-to-Text Translation and Sitting Posture Analysis

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Zinc oxide nanostructure-based textile pressure sensor for wearable applications

Cited by 24 publications

References 49 publications

Synthesis of Zinc Oxide Nanoparticles by Hydrothermal Methods and Spectroscopic Investigation of Ultraviolet Radiation Protective Properties

Synthesis of Zinc Oxide Nanoparticles by Hydrothermal Methods and Spectroscopic Investigation of Ultraviolet Radiation Protective Properties

MXene/TMD Nanohybrid for the Development of Smart Electronic Textiles Based on Physical Electromechanical Sensors

SnS/Ti3C2Tx (MXene) Nanohybrid-Based Wearable Electromechanical Sensors for Sign-to-Text Translation and Sitting Posture Analysis

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Product

Resources

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SnS/Ti₃C₂T_x (MXene) Nanohybrid-Based Wearable Electromechanical Sensors for Sign-to-Text Translation and Sitting Posture Analysis