Flexible modified plastic strips coated polyaniline/graphene composite for electrochemical biosensors

D. N. Sangeetha, H. Pooja, Savisha Bhandary, Yashaswini Shetty, Raghu Subashchandrabose, M. Selvakumar

Research output: Contribution to journalArticlepeer-review


Polyaniline(PANT)/graphene modified flexible, disposable polyester overhead projector (OHP) strips for non-enzymatic detection of ascorbic acid (AA) and uric acid (UA) is demonstrated in the current work. The deposition of PANI on the 3-aminopropyltrimethoxy silane (APTMS) modified OHP have been optimized through electrochemical impedance spectroscopy. Graphene is coated on another end. The PANI/graphene coating is confirmed through scanning electron microscopy. UA and AA detection have been carried out using the standard electrochemical techniques like cyclic voltammetry and chronoamperometry. The study reveals that the composite of PANI/graphene exhibits good sensing towards the detection of UA and AA. During the detection of UA and AA, PANI/graphene has showed enhanced current density with quick response and a linear concentration range of 10 to300 mu M for UA and 30 to 80 mu M for AA. These flexible sensor strips may be of great potential in real-time UA and AA detection.
Original languageEnglish
Pages (from-to)616-624
Number of pages9
JournalIndian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry
Issue number5
Publication statusPublished - 01-05-2020


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