A multifunctional skin-like wearable optical sensor based on an optical micro-/nanofibre

Pan, Jie; Zhang, Zhang; Jiang, Chengpeng; Zhang, Lei; Tong, Limin

doi:10.1039/d0nr03446k

Cited by 88 publications

(74 citation statements)

References 59 publications

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“…The wave structure flattened out and the transmittance increased due to the decrease of the microbend loss. [ 12 ] So, the strain sensitivity of the optical sensor is dependent on the length and curvature of the wave structure and the waist diameter of the optical microfiber to a large extent. The optical gauge factor, G , [ 11 ] is employed to characterize the strain‐sensing performance of the stretchable optical sensor:

\begin{matrix} G = (normalΔ T normal/ T) / ε = (normalΔ P normal/ P) / ε \end{matrix}

where ∆ T / T and ∆ P / P are the relative transmittance change and relative output power change, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…And the sensitivity in unit length (= G / L , where L is the length of the wave structure) is 85.7 mm −1 , which is better than the stretchable strain sensor based on the prebent optical microfiber. [ 12 ] With great sensitivity, the minimum strain that can be detected is 9 × 10 −5 considering the noise level of the system. The reversibility of the optical sensor was further investigated by automatically stretching and releasing the sensor about 100 cycles using a computer‐controlled translation stage.…”

Section: Resultsmentioning

confidence: 99%

“…proposed a multifunctional skin‐like wearable optical sensor that realized the detection of respiration and body temperature. [ 12 ] With the advantages of the electromagnetic immunity, high sensitivity, and fast response time, wearable optical sensors can be one of the best options to obtain high signal‐to‐noise ratio physiological signals. Besides, sensors based on optical fiber can easily construct networks.…”

Section: Introductionmentioning

confidence: 99%

“…prebent the optical micro‐/nano‐fiber, realizing the sensor stretchable. [ 12 ] However, patterning methods that are suitable for large‐scale production still need to be discovered for stretchable optical devices. Besides, optical sensors should become thinner to have a faster response and increase the comfort level when people wear them.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we report a stretchable and ultrathin optical sensor based on a wavy microfiber. The approach inspired by the “bottom–up” strategy for forming wavy geometries self‐assembly in microfibers is controllable and suitable for mass production, which is different from the patterning methods of the microfiber in previous articles [ 3,12 ] and paves the way for the design of the stretchable optical devices based on the microfiber. Embedding the wavy microfiber in an ultrathin polydimethylsiloxane (PDMS) film, a flexible sensor is realized for human health monitoring.…”

Section: Introductionmentioning

confidence: 99%

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Self‐Assembled Wavy Optical Microfiber for Stretchable Wearable Sensor

Zhu

Zhan

Dai

et al. 2021

Advanced Optical Materials

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Smart wearable devices have made remarkable success in medical‐grade human vital signal monitoring and have promoted the realization of precision medicine and telemedicine. The flexibility and stretchability are significant for wearable devices, which determine the adhesion to the skin and influence the signal accuracy. Here, a stretchable and ultrathin optical sensor based on a self‐assembled wavy microfiber is proposed. Thanks to the “bottom–up” strategy, the wave structure of the microfiber can be adjusted artificially, paving the way for the design of stretchable optical devices. Due to the microbend loss of the microfiber, the optical sensor has a sensitivity of ≈257 per unit strain and a good repetition (the standard deviation is 1.7% over 100 cycles). With the great sensor performance, the wrist pulse with a high signal‐to‐noise ratio is detected and the blood pressure is monitored successfully via the pulse arrival time, showing a potential application for human health monitoring.

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\begin{matrix} G = (normalΔ T normal/ T) / ε = (normalΔ P normal/ P) / ε \end{matrix}

where ∆ T / T and ∆ P / P are the relative transmittance change and relative output power change, respectively.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Self‐Assembled Wavy Optical Microfiber for Stretchable Wearable Sensor

Zhu

Zhan

Dai

et al. 2021

Advanced Optical Materials

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Age of Flexible Electronics: Emerging Trends in Soft Multifunctional Sensors

Lee,

Cho,

Kim

2024

Advanced Materials

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With the commercialization of first‐generation flexible mobiles and displays in the late 2010s, humanity has stepped into the age of flexible electronics. Inevitably, soft multifunctional sensors, as essential components of next‐generation flexible electronics, have attracted tremendous research interest like never before. This review is dedicated to offering an overview of the latest emerging trends in soft multifunctional sensors and their accordant future research and development (R & D) directions for the coming decade. First, key characteristics and the predominant target stimuli for soft multifunctional sensors are highlighted. Second, important selection criteria for soft multifunctional sensors are introduced. Next, emerging materials/structures and trends for soft multifunctional sensors are identified. Specifically, the future R & D directions of these sensors are envisaged based on their emerging trends, namely (i) decoupling of multiple stimuli, (ii) data processing, (iii) skin conformability, and (iv) energy sources. Finally, the challenges and potential opportunities for these sensors in future are discussed, offering new insights into prospects in the fast‐emerging technology.This article is protected by copyright. All rights reserved

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Pressure‐Temperature Dual‐Parameter Flexible Sensors Based on Conformal Printing of Conducting Polymer PEDOT:PSS on Microstructured Substrate

Meng

Han

et al. 2022

Adv Materials Inter

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Flexible sensors play an important role in collecting stimuli information and sending them to a central processing unit or cloud for analysis and decision‐making. As much information is needed to be collected, the fabrication of multiparameter flexible sensors is becoming increasingly urgent. To this end, conducting polymer‐based composites have been proven as promising materials for developing pressure‐temperature dual‐parameter sensors. However, fabrication of ideal dual‐parameter sensors with fully decoupled pressure‐temperature readings, good sensitivity, and a simple preparation process remain challenges. Here, a strategy of fabricating a pressure‐temperature dual‐parameter sensor based on conformal printing of conducting polymer poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on the surface of microstructured polydimethylsiloxane (PDMS) substrate is demonstrated. It is found that secondary doped PEDOT:PSS provides temperature‐independent conductivity. Combined with the sea‐island microstructured PDMS substrate, a screen‐printed flexible sensor demonstrates fully decoupled pressure‐temperature reading ability, competitive sensitivity, and good stability. The excellent sensing properties of the devices, with a maximum pressure sensitivity of 134.25 kPa−1 and linear response region over 300 kPa as well as highly sensitive temperature sensing for finger touch, together with their unique advantages of low‐cost and large‐area fabrication, make the printed flexible dual‐parameter sensors promising applications in electric‐skin (e‐skin), human‐machine interaction, and robotics.

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A multifunctional skin-like wearable optical sensor based on an optical micro-/nanofibre

Abstract: Multifunctional skin-like sensors play an important role in next-generation healthcare, robotics, and bioelectronics. Here, we report a skin-like wearable optical sensor (SLWOS) enabled by a stretchable, flexible, and attachable patch...

Cited by 88 publications

References 59 publications

Self‐Assembled Wavy Optical Microfiber for Stretchable Wearable Sensor

Self‐Assembled Wavy Optical Microfiber for Stretchable Wearable Sensor

Age of Flexible Electronics: Emerging Trends in Soft Multifunctional Sensors

Pressure‐Temperature Dual‐Parameter Flexible Sensors Based on Conformal Printing of Conducting Polymer PEDOT:PSS on Microstructured Substrate

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