Synthesis of bright blue fluorescence and water-dispersible cesium lead halide perovskite quantum dots for the selective detection of pendimethalin pesticide
- Authors
- Ghinaiya, Nirav Vajubhai; Park, Tae Jung; Kailasa, Suresh Kumar
- Issue Date
- Oct-2023
- Publisher
- Elsevier B.V.
- Keywords
- Fluorescence; Pendimethalin; PS-CsPbBr<sub>3</sub>@CTAB PQDs; UV–visible spectroscopy; Vegetables
- Citation
- Journal of Photochemistry and Photobiology A: Chemistry, v.444
- Journal Title
- Journal of Photochemistry and Photobiology A: Chemistry
- Volume
- 444
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/67587
- DOI
- 10.1016/j.jphotochem.2023.114980
- ISSN
- 1010-6030
1873-2666
- Abstract
- Perovskite quantum dots (PQDs) have garnered a lot of interest because of their exceptional optoelectronic qualities. Halide perovskites are very water-sensitive due to their ionic composition. It has been observed that encapsulating perovskite QDs with organic or inorganic materials improve their stability; nonetheless, they frequently suffer from large aggregation size, limited water solubility, and difficulty in subsequent surface functionalization. Herein, we have reported polystyrene and cetyltrimethylammonium bromide (CTAB) as a novel ligands for the surface modification of CsPbBr3 PQDs for the rapid fluorescence detection of pendimethalin pesticide in aqueous media. The as-fabricated PS-CsPbBr3@CTAB PQDs give blue fluorescence under UV light at 365 nm and exhibit good stability. When excited at 370 nm, fluorescent PS-CsPbBr3@CTAB PQDs display emission intensity at 436 nm. Upon addition of pendimethalin pesticide, the fluorescence of PS-CsPbBr3@CTAB PQDs was dramatically quenched, which yields to fluorescence turn-off. Noticeably, a linear quenching was achieved with increasing concentration of pendimethalin pesticide (5.0–100 μM) with the detection limit of 30.34 nM. Moreover, the as-synthesized PS-CsPbBr3@CTAB PQDs acted as a sensor for accurate assay of pendimethalin in potato and apple with low relative standard deviation values. © 2023 Elsevier B.V.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/67587)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.