Bimetallic nanoparticles: towards selective analysis of phosphorylated compounds by surface-enhanced Raman...

Area of Science:

• Biochemistry
• Materials Science
• Analytical Chemistry

Background:

• Selective detection of phosphorylated molecules is vital but challenging due to weak Raman signals.
• Conventional Surface-Enhanced Raman Spectroscopy (SERS) substrates have limited interaction with these analytes.

Purpose of the Study:

• To develop a novel bimetallic silver/iron oxide (Ag/FeOx) nanocomposite for improved SERS detection of phosphorylated compounds.
• To overcome synthesis challenges for creating stable nanocomposites with dual functionality.

Main Methods:

• A novel synthesis strategy combining alkaline precipitation of iron salts and silver cation reduction was employed.
• The resulting Ag/FeOx nanocomposites were characterized for their structural and SERS properties.

Main Results:

• The Ag/FeOx nanocomposites demonstrated enhanced sensitivity and selectivity for phosphorylated molecules.
• The architecture facilitates direct analyte interaction: iron oxides for capture, silver for plasmonic enhancement.
• The silver/iron oxide interface was identified as critical for SERS sensitivity.

Conclusions:

• This work presents a significant advancement in SERS-based detection strategies for phosphorylated analytes.
• The developed nanocomposites show potential for real-time, flow-based analysis in biochemical and medical applications.