301
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Ahn Y, Lee H, Lee D, Lee Y. Highly conductive and flexible silver nanowire-based microelectrodes on biocompatible hydrogel. ACS APPLIED MATERIALS & INTERFACES 2014; 6:18401-18407. [PMID: 25347028 DOI: 10.1021/am504462f] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We successfully fabricated silver nanowire (AgNW)-based microelectrodes on various substrates such as a glass and polydimethylsiloxane by using a photolithographic process for the first time. The AgNW-based microelectrodes exhibited excellent electrical conductivity and mechanical flexibility. We also demonstrated the direct transfer process of AgNW-based microelectrodes from a glass to a biocompatible polyacrylamide-based hydrogel. The AgNW-based microelectrodes on the biocompatible hydrogel showed excellent electrical performance. Furthermore, they showed great mechanical flexibility as well as superior stability under wet conditions. We anticipate that the AgNW-based microelectrodes on biocompatible hydrogel substrates can be a promising platform for realization of practical bioelectronics devices.
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Affiliation(s)
- Yumi Ahn
- Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST) , 50-1 Sang-Ri, Hyeonpung-Myeon, Dalseong-Gun, Daegu 711-873, Korea
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302
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Lee KT, Muller DA, Coffey JW, Robinson KJ, McCarthy JS, Kendall MAF, Corrie SR. Capture of the Circulating Plasmodium falciparum Biomarker HRP2 in a Multiplexed Format, via a Wearable Skin Patch. Anal Chem 2014; 86:10474-83. [DOI: 10.1021/ac5031682] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Khai Tuck Lee
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - David A. Muller
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Jacob W. Coffey
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Kye J. Robinson
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - James S. McCarthy
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia
| | - Mark A. F. Kendall
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- The University of Queensland, Faculty of Health
Sciences, St. Lucia, Queensland 4072, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Simon R. Corrie
- The University of Queensland, Australian Institute
for Bioengineering and Nanotechnology, Delivery of Drugs and Genes
Group (D2G2), St. Lucia, Queensland 4072, Australia
- Australian Infectious Diseases Research Centre, St. Lucia, Queensland 4067, Australia
- ARC
Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
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303
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Kim J, Valdés-Ramírez G, Bandodkar AJ, Jia W, Martinez AG, Ramírez J, Mercier P, Wang J. Non-invasive mouthguard biosensor for continuous salivary monitoring of metabolites. Analyst 2014; 139:1632-6. [PMID: 24496180 DOI: 10.1039/c3an02359a] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The present work describes the first example of a wearable salivary metabolite biosensor based on the integration of a printable enzymatic electrode on a mouthguard. The new mouthguard enzymatic biosensor, based on an immobilized lactate oxidase and a low potential detection of the peroxide product, exhibits high sensitivity, selectivity and stability using whole human saliva samples. Such non-invasive mouthguard metabolite biosensors could tender useful real-time information regarding a wearer's health, performance and stress level, and thus hold considerable promise for diverse biomedical and fitness applications.
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Affiliation(s)
- Jayoung Kim
- Department of NanoEngineering, University of California, 9500 Gilman Drive, La Jolla, San Diego, CA 92093-0448, USA.
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304
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Zeng W, Shu L, Li Q, Chen S, Wang F, Tao XM. Fiber-based wearable electronics: a review of materials, fabrication, devices, and applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:5310-36. [PMID: 24943999 DOI: 10.1002/adma.201400633] [Citation(s) in RCA: 667] [Impact Index Per Article: 66.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 03/29/2014] [Indexed: 04/14/2023]
Abstract
Fiber-based structures are highly desirable for wearable electronics that are expected to be light-weight, long-lasting, flexible, and conformable. Many fibrous structures have been manufactured by well-established lost-effective textile processing technologies, normally at ambient conditions. The advancement of nanotechnology has made it feasible to build electronic devices directly on the surface or inside of single fibers, which have typical thickness of several to tens microns. However, imparting electronic functions to porous, highly deformable and three-dimensional fiber assemblies and maintaining them during wear represent great challenges from both views of fundamental understanding and practical implementation. This article attempts to critically review the current state-of-arts with respect to materials, fabrication techniques, and structural design of devices as well as applications of the fiber-based wearable electronic products. In addition, this review elaborates the performance requirements of the fiber-based wearable electronic products, especially regarding the correlation among materials, fiber/textile structures and electronic as well as mechanical functionalities of fiber-based electronic devices. Finally, discussions will be presented regarding to limitations of current materials, fabrication techniques, devices concerning manufacturability and performance as well as scientific understanding that must be improved prior to their wide adoption.
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Affiliation(s)
- Wei Zeng
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hong Kong
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305
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Huang X, Liu Y, Chen K, Shin WJ, Lu CJ, Kong GW, Patnaik D, Lee SH, Cortes JF, Rogers JA. Stretchable, wireless sensors and functional substrates for epidermal characterization of sweat. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:3083-90. [PMID: 24706477 DOI: 10.1002/smll.201400483] [Citation(s) in RCA: 145] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 03/13/2014] [Indexed: 05/24/2023]
Abstract
This paper introduces materials and architectures for ultrathin, stretchable wireless sensors that mount on functional elastomeric substrates for epidermal analysis of biofluids. Measurement of the volume and chemical properties of sweat via dielectric detection and colorimetry demonstrates some capabilities. Here, inductively coupled sensors consisting of LC resonators with capacitive electrodes show systematic responses to sweat collected in microporous substrates. Interrogation occurs through external coils placed in physical proximity to the devices. The substrates allow spontaneous sweat collection through capillary forces, without the need for complex microfluidic handling systems. Furthermore, colorimetric measurement modes are possible in the same system by introducing indicator compounds into the depths of the substrates, for sensing specific components (OH(-) , H(+) , Cu(+) , and Fe(2+) ) in the sweat. The complete devices offer Young's moduli that are similar to skin, thus allowing highly effective and reliable skin integration without external fixtures. Experimental results demonstrate volumetric measurement of sweat with an accuracy of 0.06 μL/mm(2) with good stability and low drift. Colorimetric responses to pH and concentrations of various ions provide capabilities relevant to analysis of sweat. Similar materials and device designs can be used in monitoring other body fluids.
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Affiliation(s)
- Xian Huang
- University of Illinois at Urbana-Champaign, Frederick Seitz Materials Research Laboratory, 104 S. Goodwin Ave, Urbana, IL, 61801, USA
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306
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Kato K, Nakamura H, Yamauchi Y, Nakanishi K, Tomita M. Preparation of mesoporous silica thin films by photocalcination method and their adsorption abilities for various proteins. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 40:42-8. [DOI: 10.1016/j.msec.2014.03.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 02/25/2014] [Accepted: 03/18/2014] [Indexed: 11/17/2022]
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307
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Non-invasive wearable electrochemical sensors: a review. Trends Biotechnol 2014; 32:363-71. [DOI: 10.1016/j.tibtech.2014.04.005] [Citation(s) in RCA: 778] [Impact Index Per Article: 77.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 04/03/2014] [Accepted: 04/04/2014] [Indexed: 12/14/2022]
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308
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Guler E, Soyleyici HC, Demirkol DO, Ak M, Timur S. A novel functional conducting polymer as an immobilization platform. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 40:148-56. [DOI: 10.1016/j.msec.2014.03.063] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 02/18/2014] [Accepted: 03/22/2014] [Indexed: 11/24/2022]
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309
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Zhao F, Li X, Xu W, Zhang W, Ying X. An Electrochemical Sensor for L-Tryptophan Using a Molecularly Imprinted Polymer Film Produced by Copolymerization of o-Phenylenediamine and Hydroquinone. ANAL LETT 2014. [DOI: 10.1080/00032719.2014.880172] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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310
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Miller PR, Xiao X, Brener I, Burckel DB, Narayan R, Polsky R. Microneedle-based transdermal sensor for on-chip potentiometric determination of K(+). Adv Healthc Mater 2014; 3:876-81. [PMID: 24376147 DOI: 10.1002/adhm.201300541] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Revised: 10/30/2013] [Indexed: 11/07/2022]
Abstract
The determination of electrolytes is invaluable for point of care diagnostic applications. An ion selective transdermal microneedle sensor is demonstrated for potassium by integrating a hollow microneedle with a microfluidic chip to extract fluid through a channel towards a downstream solid-state ion-selective-electrode (ISE). 3D porous carbon and 3D porous graphene electrodes, made via interference lithography, are compared as solid-state transducers for ISE's and evaluated for electrochemical performance, stability, and selectivity. The porous carbon K(+) ISE's show better performance than the porous graphene K(+) ISE's, capable of measuring potassium across normal physiological concentrations in the presence of interfering ions with greater stability. This new microfluidic/microneedle platform shows promise for medical applications.
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Affiliation(s)
- Philip R. Miller
- Sandia National Laboratories; Albuquerque New Mexico 87185 USA
- Joint Department of Biomedical Engineering; University of North Carolina and North Carolina State University; Raleigh NC 27695-7115 USA
| | - Xiaoyin Xiao
- Sandia National Laboratories; Albuquerque New Mexico 87185 USA
| | - Igal Brener
- Sandia National Laboratories; Albuquerque New Mexico 87185 USA
| | | | - Roger Narayan
- Joint Department of Biomedical Engineering; University of North Carolina and North Carolina State University; Raleigh NC 27695-7115 USA
| | - Ronen Polsky
- Sandia National Laboratories; Albuquerque New Mexico 87185 USA
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311
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Tominaga M, Togami M, Tsushida M, Kawai D. Effect of N-Doping of Single-Walled Carbon Nanotubes on Bioelectrocatalysis of Laccase. Anal Chem 2014; 86:5053-60. [DOI: 10.1021/ac500700h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Masato Tominaga
- Graduate
School of Science and Technology, Kumamoto University, 2-39-1 Kurokami
Chuo-ku, Kumamoto 860-8555, Japan
- Kumamoto
Institute for Photo-Electro Organics (Phoenics), 3-11-38 Higashi-machi, Kumamoto 862-0901, Japan
| | - Makoto Togami
- Graduate
School of Science and Technology, Kumamoto University, 2-39-1 Kurokami
Chuo-ku, Kumamoto 860-8555, Japan
| | - Masayuki Tsushida
- Faculty
of Engineering, Kumamoto University, 2-40-1 Kurokami Chuo-ku, Kumamoto 860-8555, Japan
| | - Daisuke Kawai
- Solution
Technology Group, Technical Research Institute, Toho Gas Co., Ltd, 507-2 Shinpou-machi, Aichi 476-8501, Japan
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312
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Malon RSP, Chua KY, Wicaksono DHB, Córcoles EP. Cotton fabric-based electrochemical device for lactate measurement in saliva. Analyst 2014; 139:3009-16. [PMID: 24776756 DOI: 10.1039/c4an00201f] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lactate measurement is vital in clinical diagnostics especially among trauma and sepsis patients. In recent years, it has been shown that saliva samples are an excellent applicable alternative for non-invasive measurement of lactate. In this study, we describe a method for the determination of lactate concentration in saliva samples by using a simple and low-cost cotton fabric-based electrochemical device (FED). The device was fabricated using template method for patterning the electrodes and wax-patterning technique for creating the sample placement/reaction zone. Lactate oxidase (LOx) enzyme was immobilised at the reaction zone using a simple entrapment method. The LOx enzymatic reaction product, hydrogen peroxide (H2O2) was measured using chronoamperometric measurements at the optimal detection potential (-0.2 V vs. Ag/AgCl), in which the device exhibited a linear working range between 0.1 to 5 mM, sensitivity (slope) of 0.3169 μA mM(-1) and detection limit of 0.3 mM. The low detection limit and wide linear range were suitable to measure salivary lactate (SL) concentration, thus saliva samples obtained under fasting conditions and after meals were evaluated using the FED. The measured SL varied among subjects and increased after meals randomly. The proposed device provides a suitable analytical alternative for rapid and non-invasive determination of lactate in saliva samples. The device can also be adapted to a variety of other assays that requires simplicity, low-cost, portability and flexibility.
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Affiliation(s)
- Radha S P Malon
- Faculty of Biosciences and Medical Engineering (FBME), Universiti Teknologi Malaysia (UTM), 81310 Skudai, Johor, Malaysia.
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313
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Guinovart T, Valdés-Ramírez G, Windmiller JR, Andrade FJ, Wang J. Bandage-Based Wearable Potentiometric Sensor for Monitoring Wound pH. ELECTROANAL 2014. [DOI: 10.1002/elan.201300558] [Citation(s) in RCA: 191] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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314
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315
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Bandodkar AJ, Molinnus D, Mirza O, Guinovart T, Windmiller JR, Valdés-Ramírez G, Andrade FJ, Schöning MJ, Wang J. Epidermal tattoo potentiometric sodium sensors with wireless signal transduction for continuous non-invasive sweat monitoring. Biosens Bioelectron 2013; 54:603-9. [PMID: 24333582 DOI: 10.1016/j.bios.2013.11.039] [Citation(s) in RCA: 243] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 11/10/2013] [Accepted: 11/12/2013] [Indexed: 11/16/2022]
Abstract
This article describes the fabrication, characterization and application of an epidermal temporary-transfer tattoo-based potentiometric sensor, coupled with a miniaturized wearable wireless transceiver, for real-time monitoring of sodium in the human perspiration. Sodium excreted during perspiration is an excellent marker for electrolyte imbalance and provides valuable information regarding an individual's physical and mental wellbeing. The realization of the new skin-worn non-invasive tattoo-like sensing device has been realized by amalgamating several state-of-the-art thick film, laser printing, solid-state potentiometry, fluidics and wireless technologies. The resulting tattoo-based potentiometric sodium sensor displays a rapid near-Nernstian response with negligible carryover effects, and good resiliency against various mechanical deformations experienced by the human epidermis. On-body testing of the tattoo sensor coupled to a wireless transceiver during exercise activity demonstrated its ability to continuously monitor sweat sodium dynamics. The real-time sweat sodium concentration was transmitted wirelessly via a body-worn transceiver from the sodium tattoo sensor to a notebook while the subjects perspired on a stationary cycle. The favorable analytical performance along with the wearable nature of the wireless transceiver makes the new epidermal potentiometric sensing system attractive for continuous monitoring the sodium dynamics in human perspiration during diverse activities relevant to the healthcare, fitness, military, healthcare and skin-care domains.
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Affiliation(s)
- Amay J Bandodkar
- Department of NanoEngineering, University of California, San Diego La Jolla, CA 92093, USA
| | - Denise Molinnus
- Department of NanoEngineering, University of California, San Diego La Jolla, CA 92093, USA; Institute of Nano- and Biotechnologies, Aachen University of Applied Sciences, D-52428 Jülich, Germany
| | - Omar Mirza
- Department of NanoEngineering, University of California, San Diego La Jolla, CA 92093, USA
| | - Tomás Guinovart
- Department of NanoEngineering, University of California, San Diego La Jolla, CA 92093, USA; Departamento de Química Analítica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Joshua R Windmiller
- Department of NanoEngineering, University of California, San Diego La Jolla, CA 92093, USA; Electrozyme LLC, Executive Square (Suite 485), San Diego, CA 92037, USA
| | | | - Francisco J Andrade
- Departamento de Química Analítica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Michael J Schöning
- Institute of Nano- and Biotechnologies, Aachen University of Applied Sciences, D-52428 Jülich, Germany
| | - Joseph Wang
- Department of NanoEngineering, University of California, San Diego La Jolla, CA 92093, USA.
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316
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Ding L, Bond AM, Zhai J, Zhang J. Utilization of nanoparticle labels for signal amplification in ultrasensitive electrochemical affinity biosensors: A review. Anal Chim Acta 2013; 797:1-12. [DOI: 10.1016/j.aca.2013.07.035] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 07/08/2013] [Accepted: 07/14/2013] [Indexed: 12/11/2022]
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317
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Foster CW, Metters JP, Banks CE. Ultra Flexible Paper Based Electrochemical Sensors: Effect of Mechanical Contortion upon Electrochemical Performance. ELECTROANAL 2013. [DOI: 10.1002/elan.201300274] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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318
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Guinovart T, Parrilla M, Crespo GA, Rius FX, Andrade FJ. Potentiometric sensors using cotton yarns, carbon nanotubes and polymeric membranes. Analyst 2013; 138:5208-15. [PMID: 23775189 DOI: 10.1039/c3an00710c] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and generalized approach to build electrochemical sensors for wearable devices is presented. Commercial cotton yarns are first turned into electrical conductors through a simple dyeing process using a carbon nanotube ink. These conductive yarns are then partially coated with a suitable polymeric membrane to build ion-selective electrodes. Potentiometric measurements using these yarn-potentiometric sensors are demonstrated. Examples of yarns that can sense pH, K(+) and NH4(+) are presented. In all cases, these sensing yarns show limits of detection and linear ranges that are similar to those obtained with lab-made solid-state ion-selective electrodes. Through the immobilization of these sensors in a band-aid, it is shown that this approach could be easily implemented in a wearable device. Factors affecting the performance of the sensors and future potential applications are discussed.
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Affiliation(s)
- Tomàs Guinovart
- Departamento de Química Orgánica y Química Analítica, Universitat Rovira i Virgili, Carrer Marcel-li Domingo s/n, 43007 Tarragona, Spain
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319
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Jia W, Valdés-Ramírez G, Bandodkar AJ, Windmiller JR, Wang J. Epidermal Biofuel Cells: Energy Harvesting from Human Perspiration. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302922] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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320
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Jia W, Valdés-Ramírez G, Bandodkar AJ, Windmiller JR, Wang J. Epidermal biofuel cells: energy harvesting from human perspiration. Angew Chem Int Ed Engl 2013; 52:7233-6. [PMID: 23729381 DOI: 10.1002/anie.201302922] [Citation(s) in RCA: 144] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Wenzhao Jia
- Department of Nanoengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
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321
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Castorena-Gonzalez JA, Foote C, MacVittie K, Halámek J, Halámková L, Martinez-Lemus LA, Katz E. Biofuel Cell Operating in Vivo in Rat. ELECTROANAL 2013. [DOI: 10.1002/elan.201300136] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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322
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Novell M, Guinovart T, Steinberg IM, Steinberg M, Rius FX, Andrade FJ. A novel miniaturized radiofrequency potentiometer tag using ion-selective electrodes for wireless ion sensing. Analyst 2013; 138:5250-7. [DOI: 10.1039/c3an00727h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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323
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Bandodkar AJ, O'Mahony AM, Ramírez J, Samek IA, Anderson SM, Windmiller JR, Wang J. Solid-state Forensic Finger sensor for integrated sampling and detection of gunshot residue and explosives: towards ‘Lab-on-a-finger’. Analyst 2013; 138:5288-95. [DOI: 10.1039/c3an01179h] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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324
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Bandodkar AJ, Hung VWS, Jia W, Valdés-Ramírez G, Windmiller JR, Martinez AG, Ramírez J, Chan G, Kerman K, Wang J. Tattoo-based potentiometric ion-selective sensors for epidermal pH monitoring. Analyst 2012; 138:123-8. [PMID: 23113321 DOI: 10.1039/c2an36422k] [Citation(s) in RCA: 179] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article presents the fabrication and characterization of novel tattoo-based solid-contact ion-selective electrodes (ISEs) for non-invasive potentiometric monitoring of epidermal pH levels. The new fabrication approach combines commercially available temporary transfer tattoo paper with conventional screen printing and solid-contact polymer ISE methodologies. The resulting tattoo-based potentiometric sensors exhibit rapid and sensitive response to a wide range of pH changes with no carry-over effects. Furthermore, the tattoo ISE sensors endure repetitive mechanical deformation, which is a key requirement of wearable and epidermal sensors. The flexible and conformal nature of the tattoo sensors enable them to be mounted on nearly any exposed skin surface for real-time pH monitoring of the human perspiration, as illustrated from the response during a strenuous physical activity. The resulting tattoo-based ISE sensors offer considerable promise as wearable potentiometric sensors suitable for diverse applications.
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Affiliation(s)
- Amay J Bandodkar
- Department of Nanoengineering, University of California San Diego, La Jolla, CA 92093-0448, USA
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