Fluorescence tuning behavior of carbon quantum dots with gold nanoparticles via novel intercalation effect of aldicarb.

Autor: Sajwan RK; Special Centre for Nanoscience, Jawaharlal Nehru University, New Delhi 110067, India., Lakshmi GBVS; Special Centre for Nanoscience, Jawaharlal Nehru University, New Delhi 110067, India., Solanki PR; Special Centre for Nanoscience, Jawaharlal Nehru University, New Delhi 110067, India. Electronic address: Partima@mail.jnu.ac.in.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2021 Mar 15; Vol. 340, pp. 127835. Date of Electronic Publication: 2020 Aug 19.
DOI: 10.1016/j.foodchem.2020.127835
Abstrakt: A simple, sensitive and rapid fluorometric system has been developed for the detection of aldicarb (ALD) based on inner filter effect (IFE) of gold nanoparticles (AuNPs) on fluorescence (FL) intensity of carbon quantum dots (CQDs). Addition of CQDs into AuNPs, gets them aggregated due to electrostatic interaction resulting in quenching the FL intensity of CQDs. With addition of ALD into AuNPs, an intercalated layer was formed between them through Au-N and Au-S bond which reduced IFE of AuNPs. Hence, CQDs FL intensity recovered along with ALD concentration varying between 3.8 and 76 µg L -1 with lower detection limit of 3.02 µg L -1 . The spiked real samples study in fruits, vegetables and soft drinks revealed that this sensing platform was repeatable and effective for real samples. The validation of proposed method indicates that the ALD sensor is promising and adaptable for everyday on spot environment and food safety monitoring.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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