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Electrokinetic Carbohydrates Sensor by Streaming Potential with 3MPBA-PtNPs-CNTs Composite Material

2020; Institute of Physics; Volume: 167; Issue: 4 Linguagem: Inglês

10.1149/1945-7111/ab788c

1945-7111

Carolina Silva-Carrillo, Rosa María Felix‐Navarro, Sergio Pérez‐Sicairos, Balter Trujillo-Navarrete, F. Paraguay‐Delgado, Shu Wai Lin-Ho, Edgar Alonso Reynoso‐Soto,

Analytical Chemistry and Sensors

In this work, a sensitive and highly stable non-enzymatic glucose sensor is reported. It is based on self-assembled 3-mercaptophenylboronic acid (3MPBA) self-assembled on small Pt nanoparticles supported on a multi-wall carbon nanotubes (CNTs) surface. The materials characterization was performed by thermal analysis (TGA), scanning transmission electron microscopy (STEM), X-ray diffraction (XRD), cyclic voltammetry (CV), and Z potential measurements. Glucose and fructose evaluation was carried out by hydrodynamic zeta potential measurements using the streaming potential, presenting high selectivity to glucose in the alkaline medium. The 3MPBA-PtNPs-CNTs electrode exhibit a linear response in the glucose concentration range of 0 to 10 mM, high sensitivity to 22.25 mV mM −1 , and ultra-low detection of 4.5 μ M.