Research on the detection and semi-quantification of iron in water using gold nanoclusters

Description: Fluorescent GSH-AuNCs provide a highly selective platform for Fe³⁺ detection via quenching. Validated within a 0.25–5 ppm range on real water samples, this technology supports portable paper-based sensors for rapid, cost-effective onsite environmental monitoring.

This study focuses on the synthesis of glutathione-stabilized gold nanoclusters (AuNCs) to create a sensitive and efficient method for detecting iron ions (Fe³⁺) in water. The authors utilized the characteristic fluorescence quenching phenomenon when the nanoclusters interact with Fe³⁺ to establish a highly accurate quantitative model. Experimental results on real-world water samples in Vietnam showed that this sensor system has superior selective analysis capabilities compared to testing for other metal ions. In addition to laboratory measurements, the project also developed convenient paper test kits that allow for visual identification of iron contamination through color change under UV light. This is considered a potential technological solution for rapid, low-cost, and effective on-site water quality monitoring, protecting public health. This method goes beyond fluorescence sensing and opens up new avenues for applying nanozyme activity to detect trace metals at extremely low concentrations.

Organisation: Vinschool Imperia

Innovator(s): Pham Phuong Ha, Hoang Tue Minh, Ha Phuong Trang, Vu Hoang Minh, Nguyen Tuan Minh

Category: Chemistry

Country: Vietnam