Label-free detection of vitamin B by two-step enhanced Raman technique using dynamic borohydride-reduced silver...

Area of Science:

• Analytical Chemistry
• Nanotechnology
• Biochemistry

Background:

• Accurate detection of B vitamins is crucial for health and nutrition.
• Existing detection methods may lack sensitivity or require complex sample preparation.
• Developing sensitive and rapid assays for trace vitamin analysis is an ongoing challenge.

Purpose of the Study:

• To develop a novel two-step enhancement technique for sensitive B vitamin detection.
• To create a "surface hot spots" platform for synergistic chemical and physical enhancement.
• To apply the technique for detecting B vitamins in biological and other matrices.

Main Methods:

• Dynamic adsorption of B vitamin molecules onto silver nanoparticles using sodium borohydride.
• Local plasmon resonance enhancement in the presence of calcium ions.
• Utilizing deep learning techniques for signal analysis and detection.

Main Results:

• Achieved synergistic chemical and physical enhancement on vitamin molecules.
• Constructed a "surface hot spots" two-step enhancement platform.
• Enhanced Raman signal by nine orders of magnitude.
• Successfully detected B vitamins in body fluids with high accuracy and reproducibility.

Conclusions:

• The developed method offers a sensitive, rapid, and versatile platform for B vitamin detection.
• The technique shows significant promise for intelligent identification of trace B vitamins in various applications.
• The near-vertical orientation of vitamin B2 on silver nanoparticles may contribute to signal enhancement.