• LAKSHI SAIKIA

Articles written in Bulletin of Materials Science

• Development of quantum dot complex for selective detection of pyrophosphate anion with fluorescence quenching

A fluorescent probe termed as quantum dot complex (QDC) was synthesized by surface functionalizing Pd(II) complex to ZnS Qdot surface mediated through dangling S$^{2-}$ ions. The optical and morphological properties of QDC have been studied extensively through various characterization techniques. Steady state fluorescence study revealed the ultrasensitive capacity of QDC to selectively detect pyrophosphate (PPi) anion within few seconds of analyte addition. The limit of detection was found to be 39.4 ${\mu}$M. The sensing phenomenon is based on a unique partial quenching behaviour exhibited by QDC emission on analyte addition. The partial quenching effect is governed by the combined effect of photo-induced electron transfer and reabsorption in the complex system comprising of Qdot, Pd(II) complex and PPi anions. The selectivity results were compared with a statistical analysis by performing paired t-test. Significant difference in quenching efficiency of PPi with other ions, on the emission intensity of QDC was observed (95% confidence interval). Thus the sensor can be said to be demonstrating selectivity.

• # Bulletin of Materials Science

Volume 45, 2022
All articles
Continuous Article Publishing mode

• # Dr Shanti Swarup Bhatnagar for Science and Technology

Posted on October 12, 2020

Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020

Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020

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