Sequential determination of trace 4-aminoazobenzene in multiple textiles based on nanoarrayed functionalized...

Area of Science:

• Analytical Chemistry
• Materials Science
• Spectroscopy

Background:

• Reproducible signals are crucial for enhancing the precision and accuracy of Surface-Enhanced Raman Scattering (SERS).
• Expanding SERS applications requires robust substrates for on-site analysis of complex matrices.

Purpose of the Study:

• To develop a novel substrate for rapid and sequential analysis using SERS.
• To improve the stability and reproducibility of SERS signals for complex samples.

Main Methods:

• Preparation of a gold nanoparticle functionalized polystyrene substrate (Au@PS-OH) using atom transfer radical polymerization and chemical assembly.
• Evaluation of substrate morphology, stability (acid/base, mechanical, chemical), and hydrophobicity.
• Development and application of an Au@PS-OH based SERS method for sequential determination of 4-aminoazobenzene in textiles.

Main Results:

• The Au@PS-OH substrate exhibited regular nanoarray morphology, excellent anti-agglomeration, and stability.
• Hydrophobicity ensured stable droplet shapes, guaranteeing reproducible SERS light paths and signals.
• Successful sequential determination of trace 4-aminoazobenzene in various textiles with good recoveries (76.0-118.9%) and low relative standard deviations (1.6-5.1%).

Conclusions:

• The novel Au@PS-OH substrate demonstrates significant potential for rapid, sequential, and on-site SERS analysis.
• This method offers improved analytical precision and accuracy for complex real-world samples.