Highly sensitive and reusable Cu +2 /polyaniline/reduced graphene oxide nanocomposite ink-based non-enzymatic glucose se
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Highly sensitive and reusable Cu+2/polyaniline/reduced graphene oxide nanocomposite ink‑based non‑enzymatic glucose sensor Vijay Kumar Anand1 · Archana Bukke2 · Kapil Bhatt3 · Sandeep Kumar4 · Sandeep Sharma3 · Rakesh Goyal1 · G. S. Virdi1 Received: 28 November 2019 / Accepted: 11 May 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The present work focuses on the preparation and characterizations of a highly sensitive, reusable, linear, anti-interferent, and low-cost C u+2/polyaniline (PANI)/reduced graphene oxide (rGO) nanocomposite ink-based non-enzymatic glucose (NEG) sensor. The synergistic properties of C u+2/PANI and rGO result in a large number of electrochemically active and stable sites which catalytically favored the glucose oxidation. The crystal structure and morphology of PANI, C u+2/PANI +2 +2 composite, and Cu /PANI/rGO nanocomposite ink encouraged the usefulness of Cu /PANI/rGO nanocomposite ink as an electrocatalyst in NEG detection. A NEG sensor was prepared by drop coating Cu+2/PANI/rGO nanocomposite ink on a low-cost patterned FR4 electrode. The cyclic voltammetry and chronoamperometry tests were performed to estimate the electrochemical behavior of prepared Cu+2/PANI/rGO/FR4 NEG sensor. The electrooxidation of glucose was achieved at an applied potential of 0.66 V. An anti-interferent Cu+2/PANI/rGO/FR4 NEG sensor demonstrated a linear response in two different glucose concentration regimes 2.8–22.2 µM and 0–4 mM with current sensitivity of 4168.37 μA m M−1 cm−2 and −1 −2 525.4 μA mM cm , respectively. The prepared sensor displayed a limit of detection (LOD) of 4.93 µM with a response time of
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