Stamped multilayer graphene laminates for disposable in-field electrodes: application to electrochemical sensing of hydrogen peroxide and glucose

التفاصيل البيبلوغرافية
العنوان: Stamped multilayer graphene laminates for disposable in-field electrodes: application to electrochemical sensing of hydrogen peroxide and glucose
المؤلفون: Deyny Mendivelso-Perez, Jonathan C. Claussen, Iris V. Rivero, Emily A. Smith, Carmen L. Gomes, Delaney Sanborn, John A. Hondred, Srikanthan Ramesh, Loreen R. Stromberg, Josh Kogot
المصدر: Mikrochimica acta. 186(8)
سنة النشر: 2019
مصطلحات موضوعية: Materials science, chemistry.chemical_element, Metal Nanoparticles, 02 engineering and technology, Biosensing Techniques, Platinum nanoparticles, 01 natural sciences, Analytical Chemistry, law.invention, Glucose Oxidase, law, Limit of Detection, Glucose oxidase, Graphite, Composite material, Electrodes, Platinum, Detection limit, biology, Graphene, 010401 analytical chemistry, Electrochemical Techniques, Hydrogen Peroxide, 021001 nanoscience & nanotechnology, Enzymes, Immobilized, 0104 chemical sciences, Glucose, chemistry, Electrode, Printing, Three-Dimensional, biology.protein, 0210 nano-technology, Biosensor
الوصف: A multi-step approach is described for the fabrication of multi-layer graphene-based electrodes without the need for ink binders or post-print annealing. Graphite and nanoplatelet graphene were chemically exfoliated using a modified Hummers’ method and the dried material was thermally expanded. Expanded materials were used in a 3D printed mold and stamp to create laminate electrodes on various substrates. The laminates were examined for potential sensing applications using model systems of peroxide (H2O2) and enzymatic glucose detection. Within the context of these two assay systems, platinum nanoparticle electrodeposition and oxygen plasma treatment were examined as methods for improving sensitivity. Electrodes made from both materials displayed excellent H2O2 sensing capability compared to screen-printed carbon electrodes. Laminates made from expanded graphite and treated with platinum, detected H2O2 at a working potential of 0.3 V (vs. Ag/AgCl [0.1 M KCl]) with a 1.91 μM detection limit and sensitivity of 64 nA·μM−1·cm−2. Electrodes made from platinum treated nanoplatelet graphene had a H2O2 detection limit of 1.98 μM (at 0.3 V), and a sensitivity of 16.5 nA·μM−1·cm−2. Both types of laminate electrodes were also tested as glucose sensors via immobilization of the enzyme glucose oxidase. The expanded nanographene material exhibited a wide analytical range for glucose (3.7 μM to 9.9 mM) and a detection limit of 1.2 μM. The sensing range of laminates made from expanded graphite was slightly reduced (9.8 μM to 9.9 mM) and the detection limit for glucose was higher (18.5 μM). When tested on flexible substrates, the expanded graphite laminates demonstrated excellent adhesion and durability during testing. These properties make the electrodes adaptable to a variety of tests for field-based or wearable sensing applications.
تدمد: 1436-5073
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c42a3a2d46424d9211e4874886d0e315
https://pubmed.ncbi.nlm.nih.gov/31309292
Rights: OPEN
رقم الانضمام: edsair.doi.dedup.....c42a3a2d46424d9211e4874886d0e315
قاعدة البيانات: OpenAIRE