A simple and sensitive surface molecularly imprinted polymers based fluorescence sensor for detection of...

Area of Science:

• Nanotechnology
• Materials Science
• Analytical Chemistry

Background:

• Pesticide detection is crucial for environmental and food safety.
• Developing selective and sensitive sensors is an ongoing challenge.
• Molecularly imprinted polymers (MIPs) offer promise for targeted analyte recognition.

Purpose of the Study:

• To synthesize and characterize surface molecularly imprinted YVO4:Eu(3+) nanoparticles (YVO4:Eu(3+)@MIPs).
• To develop a molecularly imprinted optosensor for selective and sensitive detection of lambda-cyhalothrin (LC).
• To evaluate the sensor's performance for detecting LC residues in real samples.

Main Methods:

• Precipitation polymerization using lambda-cyhalothrin as the template molecule.
• Characterization using SEM, TEM, FT-IR, XRD, and TGA.
• Optosensing based on fluorescence quenching of YVO4:Eu(3+) core-shell nanocomposites.

Main Results:

• Successfully synthesized YVO4:Eu(3+)@MIPs core-shell nanostructures.
• Achieved selective and sensitive optosensing of lambda-cyhalothrin.
• Established two linear detection ranges (2.0-10.0 μM and 10.0-90.0 μM) with a limit of detection (LOD) of 1.76 μM.
• Demonstrated suitability for detecting LC residues in real samples.

Conclusions:

• The YVO4:Eu(3+)@MIPs sensor exhibits excellent selectivity and sensitivity for LC detection.
• The developed sensor is effective for analyzing real-world samples, indicating practical applicability.
• This work paves the way for rapid and high-efficiency detection of lambda-cyhalothrin.