Lancet-free and label-free diagnostics of glucose in sweat using Zinc Oxide based flexible bioelectronics

Munje, Rujuta D.; Muthukumar, Sriram; Prasad, Shalini

doi:10.1016/j.snb.2016.07.088

Cited by 154 publications

(107 citation statements)

References 33 publications

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“…The sizes were chosen according to the human pupil in the iris eye to avoid any obstructing vision. PDMS was used for encapsulation, as it is a highly biocompatible, flexible, and transparent material that is now widely used in the fabrication of contact lenses and embedded medical equipment . To encapsulate the antenna with PDMS and give the contact lens shape, a 3D‐printed mould was formed.…”

Section: Fabrication Moulding and Encapsulationmentioning

confidence: 99%

Electronic Contact Lens: A Platform for Wireless Health Monitoring Applications

Yuan

Das

Ghannam

et al. 2020

Advanced Intelligent Systems

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Electronic contact lenses are used for noninvasively monitoring vital human signs and medical parameters. However, maintaining a secure communications connection and a self‐sustainable power source are still looming challenges. Herein, a proof‐of‐concept electronic contact lens is demonstrated that includes a spiral antenna with its wireless circuit unit for data telemetry, a rectifier circuit for power conditioning, and a micro‐light‐emitting diode (μLED) as a load. The spiral antenna with its rectifying circuit is designed considering operation in the industrial, scientific, and medical (ISM) band of 2.4 GHz. The spiral coil with an inner diameter of 10 mm, an outer diameter of 12 mm, and a wire width of 0.2 mm is fabricated on a donut‐shaped flexible polyimide substrate. For biocompatibility purposes, polyimide is used as the contact lens substrate and polydimethylsiloxane (PDMS) is used for encapsulation. A 3D‐printed eye model is developed for accurately shaping the curvature of the PDMS‐encapsulated contact lens. The reflection coefficient (S11) of the fabricated antenna is tested in different conditions and on an eye model to mimic the liquid condition of the human eye. In a wide range of conditions, a minimum of −20 dB reflection coefficient (S11) is obtained.

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Section: Fabrication Moulding and Encapsulationmentioning

confidence: 99%

Electronic Contact Lens: A Platform for Wireless Health Monitoring Applications

Yuan

Das

Ghannam

et al. 2020

Advanced Intelligent Systems

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Section: Recent Developments In Poc Diagnosticsmentioning

confidence: 99%

“…For instance, a wearable electrochemical biosensor was developed able to detect glucose from sweat 120 . The device used metal/metal-oxide thin films contained within porous polyamide substrates to detect glucose via impedance changes 120 . The device was also able to simultaneously measure cortisol levels, which have been known to correlate physiologically to changes in glucose levels 120 .…”

Section: Recent Developments In Poc Diagnosticsmentioning

confidence: 99%

Point-of-Care Diagnostics: Recent Developments in a Connected Age

et al. 2016

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“…Based on these advancements, AOSs have been utilized in promising flexible electronic components such as fast switching and highly sensitive absorbing devices as well as efficient peripheral circuits for various applications. For example, large‐area display devices, chemical and photosensor devices, and human‐oriented bioelectronics have been demonstrated by using a variety of AOS building blocks …”

Section: Introductionmentioning

confidence: 99%

A Site‐Specific Charge Carrier Control in Monolithic Integrated Amorphous Oxide Semiconductors and Circuits with Locally Induced Optical‐Doping Process

Kim

Jeon

Lee

et al. 2019

Adv Funct Materials

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Amorphous oxide semiconductor (AOS) thin film transistors (TFTs) have found cutting-edge applications in sensor technologies. To reduce manufacturing costs, sensors, analog front end, and digital signal processing circuits need to be integrated on the identical substrate. Unlike traditional silicon-based devices, optimizations for locally controllable electrical parameters of the AOSs have rarely been investigated. Here, photoactivated combustion reduction is utilized as doping motivation for solution-processed amorphous indium-gallium-zinc oxide (a-IGZO) to tune their electrical performance. By controlling parameters of a-IGZO TFTs, which can be partly doped with covering the desired area of the identical substrate, it is possible to match the particular threshold voltage for various circuits. For circuit optimization, automatic integrated circuit modeling spice is carried out to find the best match of the complementary metal-oxide semiconductor circuits. Finally, the site-specific performance of switching TFTs, amplifiers, and ring oscillators implemented with low-temperature solution-processed a-IGZO and p-type single-walled carbon nanotube TFTs is demonstrated. The optical-doped a-IGZO TFTs exhibiting a saturation mobility of >9.15 cm 2 V −1 s −1 with a locally tunable threshold voltage of −5 -1.5 V are realized, enabling monolithic integration of functional devices. The resultant circuits demonstrate excellent amplification of 24 dB and an oscillation frequency of 12 kHz for 7-stage ring oscillators.

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Lancet-free and label-free diagnostics of glucose in sweat using Zinc Oxide based flexible bioelectronics

Cited by 154 publications

References 33 publications

Electronic Contact Lens: A Platform for Wireless Health Monitoring Applications

Electronic Contact Lens: A Platform for Wireless Health Monitoring Applications

Point-of-Care Diagnostics: Recent Developments in a Connected Age

A Site‐Specific Charge Carrier Control in Monolithic Integrated Amorphous Oxide Semiconductors and Circuits with Locally Induced Optical‐Doping Process

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