Poly(BCB)/Au-nanoparticles hybrid film modified electrode: Preparation, characterization and its application as a non-enzymatic sensor

• Published in: Thin solid films Vol. 518; no. 20; pp. 5832 - 5838
• Main Authors: Kumar, S. Ashok, Wang, Sea-Fue, Chang, Yu-Tsern
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 02.08.2010; Elsevier
• Subjects: Attachment; Chemical sensors; Chemistry; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Electrocatalysis; Electrochemistry; Electrodes; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; General equipment and techniques; Gold; Gold nanoparticles; Hybrid films; Hydrogen peroxide; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Materials science; Modified electrode; Nanoparticles; Nanoscale materials and structures: fabrication and characterization; Other topics in nanoscale materials and structures; Physics; Sensors; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Spectra; Structure and morphology; thickness; Surface chemistry; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology; Thin films; Chemical sensors; Hybrid films; Electrocatalysis; Hydrogen peroxide; Modified electrode; Gold nanoparticles; Scanning electron microscopy; Gold; pH value; Hybrid material; Electrochemical sensors; Carbon electrode; Polymerization; Thin films; Nanoparticles; Cyclic voltammetry; Metallic thin films; Ultraviolet visible spectrum; Vitreous state; Nanostructured materials
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2010.05.076

We report electrochemical preparation and characterization of poly-brilliant cresyl blue (Poly(BCB))/gold nanoparticles (Au-NPs) modified electrode. The Poly(BCB)/Au-NPs modified electrode has been used as an electrochemical sensor for the detection of hydrogen peroxide (H 2O 2) at lower potential (− 0.2 V). The Poly(BCB)/Au-NPs film was characterized by scanning electron microscopy, Uv–visible spectroscopy (Uv–vis) and cyclic voltammetry. We have observed that, Au-NPs attached glassy carbon electrode (Au-NPs/GCE) significantly enhanced the polymerization of BCB compared to bare GCE. The Poly(BCB) film was irreversibly attached onto the Au-NPs modified electrode, the resulting hybrid film modified electrode was electrochemically active in the pH range from 2 to 11. Attachment of Poly(BCB)/Au-NPs hybrid film on the electrode surface was confirmed by Uv–vis spectra. In addition, electrocatalytic properties of the Poly(BCB)/Au-NPs/GCE towards reduction of H 2O 2 have been investigated, and it was found that the sensitivity, reduction potential as well as the corresponding detection limit were improved as compared to the voltammetric response of the Poly(BCB)/GCE and Au-NPs/GCE. Based on this study, a non-enzymatic electrochemical sensor for the determination of H 2O 2 has been reported. Moreover, analysis of commercial H 2O 2 samples was performed using the proposed method and satisfactory results were obtained.