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dc.contributor.authorLei, Yongjiu
dc.contributor.authorAlshareef, Aya H.
dc.contributor.authorZhao, Wenli
dc.contributor.authorInal, Sahika
dc.date.accessioned2020-02-04T12:50:24Z
dc.date.available2020-02-04T12:50:24Z
dc.date.issued2020-01-22
dc.date.submitted2019-09-18
dc.identifier.citationLei, Y., Alshareef, A. H., Zhao, W., & Inal, S. (2020). Laser-Scribed Graphene Electrodes Derived from Lignin for Biochemical Sensing. ACS Applied Nano Materials. doi:10.1021/acsanm.9b01795
dc.identifier.doi10.1021/acsanm.9b01795
dc.identifier.urihttp://hdl.handle.net/10754/661376
dc.description.abstractLaser scribing of porous graphene electrodes on flexible substrates is of great interest for developing disposable electrochemical biosensors. In this work, we present a new patterning process for highly conductive nitrogen-doped graphene derived from a lignin-based precursor. A CO2 laser scribing process was performed under ambient conditions to produce the porous graphene electrodes from lignin. The obtained nitrogen-doped laser-scribed graphene (N-LSG) is binder-free, hierarchical, and conductive. The interconnected carbon network displayed enhanced electrochemical activity with improved heterogeneous electron transfer rate. These features can be attributed to the high conductivity of porous N-LSG (down to 2.8 Ω per square) and its enriched active edge-plane sites. Furthermore, the N-LSG electrodes were decorated with MXene/Prussian blue (Ti3C2Tx/PB) composite via a simple spray-coating process, designed for sensitive detection of analytes. The Ti3C2Tx/PB-modified N-LSG electrodes were functionalized with catalytic enzymes for detecting glucose, lactate, and alcohol. The enzyme/Ti3C2Tx/PB/N-LSG electrodes exhibited remarkably enhanced electrochemical activity toward the detection of these biomarkers with a performance on par with previously reported on-chip carbon-based biosensors. Therefore, these materials have high potential for applications in personalized healthcare.
dc.description.sponsorshipResearch reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acsanm.9b01795
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsanm.9b01795.
dc.titleLaser-Scribed Graphene Electrodes Derived from Lignin for Biochemical Sensing
dc.typeArticle
dc.contributor.departmentMaterials Science and Engineering Program
dc.contributor.departmentMaterials Science and Engineering, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentBioscience Program
dc.identifier.journalACS Applied Nano Materials
dc.eprint.versionPre-print
kaust.personLei, Yongjiu
kaust.personAlshareef, Aya H.
kaust.personZhao, Wenli
kaust.personInal, Sahika
dc.date.accepted2019-12-26
refterms.dateFOA2020-02-05T05:33:39Z


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