Graphene Defects in Saccharide Carbon Dots Govern Electrochemical Sensitivity |
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| Authors: | Charles C. Chusuei Christopher J. Clark Raja Ram Pandey Ethan T. Williams Carissa Shuxteau Elif S. Seven Roger M. Leblanc |
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| Affiliation: | 1. Department of Chemistry, Middle Tennessee State University, 440 Friendship Street, Murfreesboro, TN 37132 USA;2. Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, FL 33146 USA |
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| Abstract: | Galactose (Gal), lactose (Lac), and glucose (Glu) derived carbon dots (CDs) were evaluated for their utility as electrochemical sensing composites using acetaminophen (APAP) as a probe molecule. The goal of this work is to ascertain the role of graphene defects on electrochemical activity. Higher sp2-to-sp3 hybridized carbon ratios (in parentheses) in the CDs correlated with higher sensitivity in the order according to measured Raman IG/ID intensities: GluCDs (6.53)−3 APAP range at pH=7.0 was achieved, suitable for practical APAP toxicity monitoring. Defect density within the GalCDs provided the highest sensitivity. |
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| Keywords: | Raman carbon dots acetaminophen graphene defects |
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