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Title: Water-stable perovskite quantum dots-based FRET nanosensor for the detection of Rhodamine 6G in water, food, and biological samples
Authors: Chan, Kok Ken
Yap, Stephanie Hui Kit
Giovanni, David
Sum, Tze Chien
Yong, Ken-Tye
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2022
Source: Chan, K. K., Yap, S. H. K., Giovanni, D., Sum, T. C. & Yong, K. (2022). Water-stable perovskite quantum dots-based FRET nanosensor for the detection of Rhodamine 6G in water, food, and biological samples. Microchemical Journal, 180, 107624-.
Project: M4080514 
Journal: Microchemical Journal 
Abstract: The practical application of perovskite quantum dots (QDs) for sensing in the aqueous phase has been restricted by their poor resistance to moisture and oxygen due to their highly ionic characteristic. In this work, we employed silica and phospholipid co-encapsulated water-stable all-inorganic CsPbBr3 QDs as a ratiometric fluorescence resonance energy transfer (FRET)-based fluorescence nanosensor for the detection of Rhodamine 6G (R6G) in food, water, and biological samples. The nanosensor on its own exhibits a strong green emission signal at 518 nm. However, in the presence of R6G, the original fluorescence signal at 518 nm decreases while a new emission peak at 565 nm increases, accordingly, indicating a typical ratiometric fluorescence relationship. The fluorescence intensity ratio (I565/I518) was found to be linearly correlated to the concentration of R6G present. The proposed R6G nanosensor has a linear operating range of 0 – 10 g/mL and a detection limit of 0.01 g/mL. In addition, the proposed nanosensor displayed good selectivity towards R6G when tested with other color additives and was also able to detect R6G in tap water, food, and biological samples that contain complex interfering background species. Overall, this work opens a new avenue for water-stable perovskite quantum dots for aqueous-phase sensing applications.
ISSN: 0026-265X
DOI: 10.1016/j.microc.2022.107624
DOI (Related Dataset): 10.21979/N9/8ZURD3
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Organisations: National University of Singapore
Rights: © 2022 Elsevier B.V. All rights reserved. This paper was published in Microchemical Journal and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20241007
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
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