Chitosan-poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)-AuNPs composite for acetone detection using...

Area of Science:

• Chemical Sensors
• Nanomaterials
• Analytical Chemistry

Background:

• Acetone detection is crucial for medical and industrial safety.
• Existing methods may lack specificity or sensitivity.
• Development of advanced sensors is needed for accurate acetone monitoring.

Purpose of the Study:

• To develop a novel surface plasmon resonance (SPR) image sensor for acetone detection.
• To utilize a composite material of chitosan, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS), and gold nanoparticles (AuNPs).
• To evaluate the sensor's performance for pure acetone vapor and in the presence of interfering substances.

Main Methods:

• Fabrication of gold nanoparticles using laser ablation.
• Preparation of chitosan-PEDOT:PSS and chitosan-PEDOT: PSS-AuNPs composite sensing layers.
• Deployment of the composite materials on an SPR image sensor for vapor detection.
• Comparative analysis of sensor response to pure acetone, and acetone mixed with methanol and ethanol.

Main Results:

• The SPR image sensor demonstrated successful detection of acetone vapor.
• The sensor exhibited a significantly higher response to pure acetone compared to acetone mixed with methanol or ethanol.
• Minimal sensor response was observed for pure methanol and ethanol, indicating selectivity.

Conclusions:

• The developed SPR image sensor based on chitosan-PEDOT: PSS-AuNPs composite is a promising tool for selective acetone detection.
• The sensor's enhanced response to pure acetone highlights its potential for accurate monitoring in various applications.
• The material composition provides a basis for future sensor development with improved sensitivity and specificity.