Ultraviolet Photodetectors Based on Polymer Microwire Arrays toward Wearable Medical Devices

Zhang, Zhen; Geng, Yan; Cao, Shougen; Chen, Zheng; Gao, Hanfei; Zhu, Xuanbo; Wu, Yuchen

doi:10.1021/acsami.2c04169

Cited by 19 publications

(12 citation statements)

References 37 publications

(49 reference statements)

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“…Quartz glass has excellent optical properties and shows excellent transmittance in the continuous UV to infrared wavelength range. With these superior optical properties, quartz devices play an essential role in the optical systems of space telescopes, medical devices, and 5G communications. − Therefore, the reusability and recovery of quartz can affect their production costs, and for this purpose, quartz substrates were used for this study. First, ESO-11-Coum was spin-coated from acetone on the cleaned quartz slide with an area of 200 mm 2 and the substrate dried at 40 °C under vacuum to remove any traces of acetone.…”

Section: Resultsmentioning

confidence: 99%

Eco-Friendly Photoreversible Adhesives Derived from Coumarin-Functionalized Epoxy Soybean Oil

Boga

Patti

Warner

et al. 2023

ACS Appl. Polym. Mater.

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The increasing demand for high-performance thermosetting adhesive materials is causing the continuous depletion of fossil reserves and has led to environmental pollution by accumulating recalcitrant plastic waste as thermosetting polymer networks are hard to recycle or reuse. This is particularly true in the case of their use as adhesives, where not only can a crosslinked adhesive not be recovered but multi-material components and devices can be difficult to readily separate, making reuse and recycling complex. Bio-based feedstocks and reusable polymeric materials can start to address these issues and reduce their environmental impact. In this work, we developed sustainable green adhesives which are reversible in architecture (changing from thermoset to non-crosslinked material) by combining bio-renewable epoxidized soybean oil (ESO) and non-toxic coumarins, which can readily undergo reversible [2 + 2] cycloaddition reaction under the appropriate wavelength of UV light. A series of coumarin-modified ESO materials were synthesized and chemically characterized by 1H NMR, 13C NMR, Fourier-transform infrared (FTIR) spectroscopy, and gel permeation chromatography. The extent and kinetics of the polymerization of all systems were monitored and calculated using UV–visible spectroscopy. The photoreversibility of these synthesized polymer networks was also chemically investigated and quantified with UV–visible spectroscopy and FTIR techniques. The physical properties of the materials were tested as well as their ability to heal defects such as scratches on the surface when stimulated by the appropriate UV light. Systems with a more flexible coumarin arm showed a superior adhesion strength with a measurable lap shear strength of 3.1 MPa with a minimum of 0.045 J cm–2 dose of 365 nm UV irradiation and with an excellent reuse efficiency of 94%.

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Section: Resultsmentioning

confidence: 99%

Eco-Friendly Photoreversible Adhesives Derived from Coumarin-Functionalized Epoxy Soybean Oil

Boga

Patti

Warner

et al. 2023

ACS Appl. Polym. Mater.

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“…(H) Schematic of the demonstration of the flexible array as a wearable electronics in monitoring UV photodetection signals. Reproduced with permission 212 . Copyright 2022, American Chemical Society.…”

Section: Polymer Materials Enabled Non‐contact E‐skinsmentioning

confidence: 99%

“…Due to the pyroelectric effect of the P(VDF‐TrFE) copolymer film, the transistor device could be switched on by a 40 on–off ratio when an infrared laser with a modulation frequency of 0.01 Hz is applied on the top electrode of the pyroelectric sensor. Zhang et al assembled the polymer microwire arrays via an efficient solution‐processing method combined with the strictly regulated dewetting of liquid, and then proposed a high‐performance ultraviolet (UV) photodetector with a high on/off ratio of 137 and responsivity of 19.1 mA W −1 212 . To demonstrate the application in image sensing, an array composed of 14 × 18 polymer array‐based photodetectors was fabricated.…”

Section: Polymer Materials Enabled Non‐contact E‐skinsmentioning

confidence: 99%

“…Zhang et al assembled the polymer microwire arrays via an efficient solution-processing method combined with the strictly regulated dewetting of liquid, and then proposed a highperformance ultraviolet (UV) photodetector with a high on/off ratio of 137 and responsivity of 19.1 mA W À1 . 212 To demonstrate the application in image sensing, an array composed of 14 Â 18 polymer array-based photodetectors was fabricated. Figure 10F presents the imagesensing system that involves a 365-nm UV irradiation, a shadow photomask with the pattern of Arabic numerals, a photodetectors array, and a quartz substrate.…”

Section: Polymer Materials Enabled Non-contact E-skinsmentioning

confidence: 99%

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Advanced polymer materials‐based electronic skins for tactile and non‐contact sensing applications

Yin

Niu

Kim

et al. 2023

InfoMat

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Recently, polymer materials have been at the forefront of other materials in building high-performance flexible electronic skin (e-skin) devices due to conspicuous advantages including excellent mechanical flexibility, good compatibility, and high plasticity. However, most research works just paid considerable attention and effort to the design, construction, and possible application of e-skins that reproduce the tactile perception of the human skin sensory system.Compared with tactile sensing devices, e-skins that aim to imitate the noncontact sensing features in the sensory system of human skin tend to avoid undesired issues such as bacteria spreading and mechanical wear. To further promote the development of e-skins to the human skin sensory system where tactile perception and non-contact sensing complement each other, significant progress and advances have been achieved in the field of polymer materials enabled e-skins for both tactile perception and non-contact sensing applications.In this review, the latest progress in polymer material-based e-skins with regard to tactile, non-contact sensing capabilities and their practical applications are introduced. The fabrication strategies of polymer materials and their role in building high-performance e-skins for tactile and non-contact sensing are highlighted. Furthermore, we also review the research works that integrated the polymer-based tactile and non-contact e-skins into robots and prostheses, smart gloves, and VR/AR devices and addressed some representative problems to demonstrate their suitability in practical applications in human-machine interactions. Finally, the current challenges in the construction of high-performance tactile and non-contact e-skins are highlighted and promising properties in this direction, by taking advantage of the polymer materials, are outlined.

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“…recognition and imaging arrays [5,6] and health in which the UV radiation is responsible for different types of diseases including cataracts and skin cancer. [7,8] In this context, the fabrication of efficient UV-Vis self-powered PDs is necessary. [9] Recently, the pyro-phototronic effect, has attracted much attention as a promising route/pathway for increasing the PD parameters such as responsivity and detectivity.…”

Section: Introductionmentioning

confidence: 99%

Disentangling the Role of the SnO Layer on the Pyro‐Phototronic Effect in ZnO‐Based Self‐Powered Photodetectors

Vieira

Silva

Gwóźdź

et al. 2023

Small

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Self‐powered photodetectors (PDs) have been recognized as one of the developing trends of next‐generation optoelectronic devices. Herein, it is shown that by introducing a thin layer of SnO film between the Si substrate and the ZnO film, the self‐powered photodetector Al/Si/SnO/ZnO/ITO exhibits a stable and uniform violet sensing ability with high photoresponsivity and fast response. The SnO layer introduces a built‐in electrostatic field to highly enhance the photocurrent by over 1000%. By analyzing energy diagrams of the p‐n junction, the underlying physical mechanism of the self‐powered violet PDs is carefully illustrated. A high photo‐responsivity (R) of 93 mA W−1 accompanied by a detectivity (D*) of 3.1 × 1010 Jones are observed under self‐driven conditions, when the device is exposed to 405 nm excitation laser wavelength, with a laser power density of 36 mW cm−2 and at a chopper frequency of 400 Hz. The Si/SnO/ZnO/ITO device shows an enhancement of 3067% in responsivity when compared to the Al/Si/ZnO/ITO. The photodetector holds an ultra‐fast response of ≈ 2 µs, which is among the best self‐powered photodetectors reported in the literature based on ZnO.

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Ultraviolet Photodetectors Based on Polymer Microwire Arrays toward Wearable Medical Devices

Cited by 19 publications

References 37 publications

Eco-Friendly Photoreversible Adhesives Derived from Coumarin-Functionalized Epoxy Soybean Oil

Eco-Friendly Photoreversible Adhesives Derived from Coumarin-Functionalized Epoxy Soybean Oil

Advanced polymer materials‐based electronic skins for tactile and non‐contact sensing applications

Disentangling the Role of the SnO Layer on the Pyro‐Phototronic Effect in ZnO‐Based Self‐Powered Photodetectors

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