Recent Aptamer-Based Biosensors for Cd²⁺ Detection

Area of Science:

• Environmental Science
• Analytical Chemistry
• Biotechnology

Background:

• Cadmium (Cd2+) is a highly toxic environmental pollutant with significant health implications.
• Traditional monitoring methods for Cd2+ are often expensive and complex.
• There is a need for simple, sensitive, and cost-effective detection approaches.

Purpose of the Study:

• To review aptamer-based biosensor strategies for cadmium ion (Cd2+) detection.
• To explore electrochemical, fluorescent, and colorimetric sensing methods.
• To discuss the practical applications and environmental implications of these biosensors.

Main Methods:

• Selection of Aptamer (SELEX) for generating specific DNA biosensors.
• Development of aptamer-based biosensors utilizing electrochemical, fluorescent, and colorimetric techniques.
• Integration of signal amplification mechanisms like hybridization chain reactions.

Main Results:

• Aptamer-based biosensors demonstrate high affinity and specificity for Cd2+ detection.
• Signal amplification strategies enhance the sensitivity of aptamer biosensors.
• Various aptamer biosensor platforms (electrochemical, fluorescent, colorimetric) have been successfully developed.

Conclusions:

• Aptamer-based biosensors represent a simple, sensitive, and convenient approach for Cd2+ monitoring.
• These biosensors have significant implications for environmental protection and human health surveillance.
• Further development and application of these sensors are warranted for effective cadmium management.