Journal Article

A molecularly imprinted electrochemical biosensor based on hierarchical Ti2Nb10O29 (TNO) for glucose detection

Karaman, Onur, Karaman, Ceren, Yola, Mehmet Lütfi, Atar, Necip

2022

Overview

A novel molecularly imprinted electrochemical biosensor for glucose detection is reported based on a hierarchical N-rich carbon conductive-coated TNO structure (TNO@NC). Firstly, TNO@NC was fabricated by a novel polypyrrole-chemical vapor deposition (PPy-CVD) method with minimal waste generation. Afterward, the electrode modification with TNO@NC was performed by dropping TNO@NC particles on glassy carbon electrode surfaces by infrared heat lamp. Finally, the glucose-imprinted electrochemical biosensor was developed in presence of 75.0 mM pyrrole and 25.0 mM glucose in a potential range from + 0.20 to + 1.20 V versus Ag/AgCl via cyclic voltammetry (CV). The physicochemical and electrochemical characterizations of the fabricated molecularly imprinted biosensor was conducted by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD) method, X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), and CV techniques. The findings demonstrated that selective, sensitive, and stable electrochemical signals were proportional to different glucose concentrations, and the sensitivity of molecularly imprinted electrochemical biosensor for glucose detection was estimated to be 18.93 μA μM −1  cm −2 ( R 2  = 0.99) at + 0.30 V with the limit of detection (LOD) of 1.0 × 10 −6  M. Hence, it can be speculated that the fabricated glucose-imprinted biosensor may be used in a multitude of areas, including public health and food quality. Graphical abstract

• Publisher: Springer Vienna,Springer Nature B.V
• Subject: Analytical Chemistry / Biosensors / Carbon / Characterization and Evaluation of Materials / Chemical vapor deposition / Chemistry / Chemistry and Materials Science / Crystal structure / Electrochemical impedance spectroscopy / Electrochemistry / Electrodes / Electron microscopy / Electrons / Enzymes / Food quality / Fourier transforms / Glassy carbon / Glucose / Microengineering / Microscopy / Nanochemistry / Nanomaterials / Nanoparticles / Nanotechnology / Original Paper / Particle size / Photoelectron spectroscopy / Photoelectrons / Polymerization / Polymers / Polypyrroles / Public health / Scanning electron microscopy / Sensors / Silver chloride / Spectrum analysis / Transmission electron microscopy / Uric acid / X ray photoelectron spectroscopy / X-ray diffraction