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Cross-Linked Polyamide Chains Enhanced the Fluorescence of Polymer Carbon Dots.

ABSTRACT: Carbon dots (CDs) have attracted tremendous attention for their outstanding advantages in luminescence. Here, ?-amino-substituted lysine derivatives with the determined chemical structure were employed as precursors to obtain bright and highly stable fluorescent CDs through a facile hydrothermal route. The relationships among the chemical structure of precursors, CD fluorescence, and particle size were investigated. The results indicated that increased numbers of functional groups in precursors could promote the degree of cross-linking and lead to a smaller size, better fluorescent properties, and stronger stability of CDs. The C-CDs that were prepared from lysine derivatives with most functional groups showed excitation-dependent dual excitation and dual emission (DE²), high-stability luminescence, strong resistance to photobleaching, and high selectivity to Fe³⁺ and could be used as a sensitive probe for Fe³⁺ detection.

SUBMITTER: Yang S

PROVIDER: S-EPMC7161025 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Cross-Linked Polyamide Chains Enhanced the Fluorescence of Polymer Carbon Dots.

Yang Shouning S Zhang Yanmin Y Xue Yuyan Y Lu Sijia S Yang Huayan H Yang Lin L Ding Chuanfan C Yu Shaoning S

ACS omega 20200401 14

Carbon dots (CDs) have attracted tremendous attention for their outstanding advantages in luminescence. Here, α-amino-substituted lysine derivatives with the determined chemical structure were employed as precursors to obtain bright and highly stable fluorescent CDs through a facile hydrothermal route. The relationships among the chemical structure of precursors, CD fluorescence, and particle size were investigated. The results indicated that increased numbers of functional groups in precursors ...[more]

PMID: 32309732

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Project description:BackgroundNorovirus is a common pathogen that causes foodborne outbreaks every year and the increasing number of deaths caused by it has become a substantial concern in both developed and underdeveloped countries. To date, no vaccines or drugs are able to control the outbreak, highlighting the importance of finding specific, and sensitive detection tools for the viral pathogen. Current diagnostic tests are limited to public health laboratories and/or clinical laboratories and are time-consuming. Hence, a rapid and on-site monitoring strategy for this disease is urgently needed to control, prevent and raise awareness among the general public.ResultsThe present study focuses on a nanohybridization technique to build a higher sensitivity and faster detection response to norovirus-like particles (NLPs). Firstly, the wet chemical-based green synthesis of fluorescent carbon quantum dots and gold nanoparticles (Au NPs) has been reported. Then, a series of characterization studies were conducted on the synthesized carbon dots and Au NPs, for example, high-resolution transmission emission microscopy, fluorescence spectroscopy, fluorescence life-lime measurement, UV-visible spectroscopy, and X-ray diffraction (XRD). The fluorescence emission of the as-synthesized carbon dots and the absorption of Au NPs were located at 440 nm and 590 nm, respectively. Then, the plasmonic properties of Au NPs were utilized to enhance the fluorescence emission of carbon dots in the presence of NLPs in human serum. Here, the enhanced fluorescence response was linearly correlated up to 1 μg mL-1. A limit of detection (LOD) value was calculated to be 80.3 pg mL-1 demonstrating that the sensitivity of the proposed study is 10 times greater than that of the commercial diagnostic kits.ConclusionsThe proposed exciton-plasmon interaction-based NLPs-sensing strategy was highly sensitive, specific, and suitable for controlling upcoming outbreaks. Most importantly, the overall finding in the article will take the technology a step further to applicable point-of-care (POC) devices.

Dataset Information

Cross-Linked Polyamide Chains Enhanced the Fluorescence of Polymer Carbon Dots.

Publications

Cross-Linked Polyamide Chains Enhanced the Fluorescence of Polymer Carbon Dots.

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