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Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
Published on: April 1, 2013
Polyaniline Nanofibers-Embedded Gold Nanoparticles Obtained by Template-Free Procedure with Immobilization Prospects
Joaquín Rafael Crespo-Rosa1, Alfonso Sierra-Padilla1, Juan José García-Guzmán2
1Department of Analytical Chemistry, Institute of Research on Electron Microscopy and Materials (IMEYMAT), Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río San Pedro S/N, 11510 Puerto Real, Cádiz, Spain.
We developed a fast, green sonochemical method to create nanostructured conducting polymer-gold nanoparticle composites. These composites enable sensitive glucose detection in wine using a novel biosensor.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Developing efficient methods for synthesizing nanostructured conducting polymers (nCPs) embedded with gold nanoparticles (AuNPs) is crucial for advanced applications.
- Existing synthesis procedures are often time-consuming and environmentally taxing.
Purpose of the Study:
- To develop a simple, green, and rapid one-pot sonochemical method for preparing nCPs-AuNPs nanocomposites.
- To explore the application of these nanocomposites as a matrix for enzyme immobilization in biosensors.
Main Methods:
- One-pot sonochemical synthesis of nCPs-AuNPs using aniline, thiophene, or 3,4-ethylenedioxythiophene precursors and KAuCl4.
- Characterization using SEM, TEM, EDS, FTIR, CV, and EIS.
- Fabrication and testing of a glucose biosensor using immobilized glucose oxidase (GOX) on PANI-AuNPs nanofibers.
Main Results:
- Achieved rapid (5-10 min) synthesis of template-free nCPs-AuNPs nanocomposites, including bulk quantities of polyaniline-AuNPs (PANI-AuNPs) nanofibers.
- Demonstrated successful immobilization of glucose oxidase (GOX) on the PANI-AuNPs matrix.
- Developed a GOX-PANI-AuNPs/Sonogel-Carbon biosensor that achieved high glucose recovery (99.54%) in real wine samples.
Conclusions:
- The sonochemical method offers a superior alternative for synthesizing nCPs-AuNPs nanocomposites due to its speed, simplicity, and eco-friendliness.
- The developed PANI-AuNPs nanofibers show significant promise as an immobilization matrix for biosensor applications.
- This research opens avenues for exploring nCPs-AuNPs in fields like (bio)sensors, catalysis, and composite materials.
