Carbon dots-silver nanoparticles fluorescence resonance energy transfer system as a novel turn-on fluorescent probe for selective determination of cysteine

Amjadi, Mohammad; Abolghasemi-Fakhri, Zahra; Hallaj, Tooba

doi:10.1016/j.jphotochem.2015.04.016

Cited by 93 publications

(24 citation statements)

References 45 publications

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“…Quenching of the C-dot fluorescence by various analytes has been widely reported and is generally ascribed to electron and energy transfer between the target molecules and surface residues on the C-dots, inducing non-radiative decay processes of the C-dot excitons. 45 In the case of trypsin, the quenching of the fluorescence signal of the C-dots may be ascribed to π-π interactions between the aromatic ring system of the C-dots and the hydrophobic units of trypsin. 46,47 Notably, the 'free' C-dots prepared in solution exhibited an inferior degree of fluorescence quenching when exposed to trypsin (Supplementary Figure S9, Supporting Information) in comparison with the confined C-dots, underscoring the significance of the PSiO 2 matrix in promoting the adsorption of the target analytes and their subsequent effect on the embedded C-dots.…”

Section: Bimodal Detection Of Trypsin and Atpmentioning

confidence: 99%

Synthesis and characterization of a nanostructured porous silicon/carbon dot-hybrid for orthogonal molecular detection

et al. 2018

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A new hybrid guest-host material consisting of a Fabry-Pérot porous silicon (PSi) thin film, a nanostructured high surface-area matrix, and encapsulated fluorescent carbon quantum dots (C-dots) is described. The hybrid is synthesized by a facile in situ pyrolysis treatment of the carbonaceous precursor incorporated within the nanoscale pores of the inorganic host. The effects of nanoconfinement on the integrity of the C-dots and their optical properties are characterized. We show that the resulting hybrid allows for label-free optical detection of target molecules using two orthogonal modalities, that is, the white-light reflectivity of the PSi matrix and the fluorescence of the confined C-dots, and these two signals can be observed and collected simultaneously. The resulting hybrid system exhibits superior sensing performance in comparison with that of the individual components. Notably, we demonstrate that the confined C-dots exhibit greater sensitivity toward various analytes as well as an improved linear response, thus providing evidence of the impact of the host nanoscale porous scaffold on the optical properties of the C-dots. Moreover, we show that this orthogonal detection scheme increases the dynamic range of the sensor and minimizes falsenegative results.

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Section: Bimodal Detection Of Trypsin and Atpmentioning

confidence: 99%

Synthesis and characterization of a nanostructured porous silicon/carbon dot-hybrid for orthogonal molecular detection

et al. 2018

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“…In recent years several reports on gold NPs for various fluorometric, quantum dots, and UCNP are summarized in Table 2 [88][89][90][91][92][93]. Further, FRET performance improvers for the interaction with fluorophore silver NPs were reported as FRET in recent times [94][95][96]. The studied growth factor-BB identification of the human platelet using the enhanced silver nanoparticular FRET sensor of BHQ-2 quencher strands.…”

Section: Fluorimetric Sensingmentioning

confidence: 99%

Recent Trends in Noble Metal Nanoparticles for Colorimetric Chemical Sensing and Micro-Electronic Packaging Applications

Gautam¹,

Komal

Gautam

et al. 2021

Metals

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Noble metal NPs are highly attractive candidates because of their unique combination of physical, chemical, mechanical, and structural properties. A lot of developments in this area are still fascinating the materials research community, and are broadly categorized in various sectors such as chemical sensors, biosensors, Förster resonance energy transfer (FRET), and microelectronic applications. The related function and properties of the noble metals in these areas can be further tailored by tuning their chemical, optical, and electronic properties that are influenced by their size, shape, and distribution. The most widely used Au and Ag NPs in dispersed phase below 100 nm exhibit strong color change in the visible range which alters upon aggregation of the NPs. The chemical sensing of the analyte is influenced by these NPs aggregates. In this article, we have summarized the uniqueness of noble metal NPs, their synthesis methods, nucleation and growth process, and their important applications in chemical sensing, microelectronic packaging, and Förster resonance energy transfer.

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“…Typically, turn-on CD-based fluorescence sensors require additional integration steps with other ions or molecules [ 100 – 103 ]. Yuan et al [ 104 ] reported a turn-on mercury ion sensor using bis(dithiocarbamato) copper(II) (CuDTC 2 )-functionalized carbon.…”

Section: Sensor Designmentioning

confidence: 99%

“…The LOD was calculated to be 22 nM with a linear range from 0.2 to 600 µM; the sensor was capable of detecting GSH in human whole blood samples. Amjadi et al [ 100 ] designed a FRET-based detection system using CDs as the donor and silver nanoparticles as the acceptor for the selective sensing of Cys. The system presented an LOD of 4 nM with a linear operating range of 6–300 nM.…”

Section: Sensing Applicationsmentioning

confidence: 99%

Biogreen Synthesis of Carbon Dots for Biotechnology and Nanomedicine Applications

2018

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Over the past decade, carbon dots have ignited a burst of interest in many different fields, including nanomedicine, solar energy, optoelectronics, energy storage, and sensing applications, owing to their excellent photoluminescence properties and the easiness to modify their optical properties through doping and functionalization. In this review, the synthesis, structural and optical properties, as well as photoluminescence mechanisms of carbon dots are first reviewed and summarized. Then, we describe a series of designs for carbon dot-based sensors and the different sensing mechanisms associated with them. Thereafter, we elaborate on recent research advances on carbon dot-based sensors for the selective and sensitive detection of a wide range of analytes, including heavy metals, cations, anions, biomolecules, biomarkers, nitroaromatic explosives, pollutants, vitamins, and drugs. Lastly, we provide a concluding perspective on the overall status, challenges, and future directions for the use of carbon dots in real-life sensing.

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Carbon dots-silver nanoparticles fluorescence resonance energy transfer system as a novel turn-on fluorescent probe for selective determination of cysteine

Cited by 93 publications

References 45 publications

Synthesis and characterization of a nanostructured porous silicon/carbon dot-hybrid for orthogonal molecular detection

Synthesis and characterization of a nanostructured porous silicon/carbon dot-hybrid for orthogonal molecular detection

Recent Trends in Noble Metal Nanoparticles for Colorimetric Chemical Sensing and Micro-Electronic Packaging Applications

Biogreen Synthesis of Carbon Dots for Biotechnology and Nanomedicine Applications

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