Neuron-Inspired Nanofluidic Biosensors for Highly Sensitive and Selective Imidacloprid Detection

Area of Science:

• Environmental Science
• Analytical Chemistry
• Materials Science

Background:

• Pesticide residues, particularly imidacloprid, pose risks to food safety and human health.
• Concerns include cardiovascular, respiratory, and reproductive toxicity from neonicotinoid exposure.
• Need for rapid, selective, and portable detection methods for imidacloprid is critical.

Purpose of the Study:

• To develop a sensitive and reliable method for detecting imidacloprid residues.
• To create a neuron-inspired nanofluidic biosensor for rapid pesticide analysis.
• To establish a new approach for monitoring hazardous pesticide residues in food and environmental samples.

Main Methods:

• Fabrication of a neuron-inspired nanofluidic biosensor using porous anodic aluminum oxide.
• Modification of the nanochannel surface with tyrosine to capture imidacloprid via π-π interactions and hydrogen bonds.
• Testing the biosensor's performance for imidacloprid detection across a wide concentration range.

Main Results:

• The tyrosine-modified artificial nanochannel demonstrated sensitive imidacloprid detection.
• Achieved a wide detection concentration range from 10^-8 to 10^-4 g/mL.
• Established an ultralow detection limit of 6.28 × 10^-9 g/mL, surpassing existing sensors.

Conclusions:

• The developed nanofluidic biosensor offers a highly sensitive and efficient method for imidacloprid detection.
• This technology provides a promising platform for portable, rapid analysis of pesticide residues.
• The findings offer a novel perspective for ensuring food safety and environmental monitoring.