Scotch-tape-like exfoliation effect of graphene quantum dots for efficient preparation of graphene nanosheets in water

Zhou, Quanzhu; Xia, Guangsen; Du, Min; Lu, Yonghong; Xu, Hongyao

doi:10.1016/j.apsusc.2019.03.290

Cited by 52 publications

(22 citation statements)

References 41 publications

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“…The fluorescence spectra of the GQDs were obtained for different excitation wavelengths ( Figure 1B ). The emission wavelength of the GQDs was dependent on the excitation wavelength, which is consistent with the known characteristics of GQDs (Zhou et al, 2019 ). For example, when the excitation wavelength was increased from 320 to 440 nm, the PL peak is red-shifted (Zhou et al, 2009 ), with the strongest peak appearing at 450 nm upon excitation at 380 nm.…”

Section: Resultssupporting

confidence: 86%

Electrochemiluminescence Detection of Sunset Yellow by Graphene Quantum Dots

et al. 2020

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Use of food additives, such as colorants and preservatives, is highly regulated because of their potential health risks to humans. Therefore, it is important to detect these compounds effectively to ensure conformance with industrial standards and to mitigate risk. In this paper, we describe the preparation and performance of an ultrasensitive electrochemiluminescence (ECL) sensor for detecting a key food additive, sunset yellow. The sensor uses graphene quantum dots (GQDs) as the luminescent agent and potassium persulfate as the co-reactant. Strong and sensitive ECL signals are generated in response to trace amounts of added sunset yellow. A detection limit (signal-to-noise ratio = 3) of 7.6 nM and a wide linear range from 2.5 nM to 25 µM are demonstrated. A further advantage of the method is that the luminescent reagents can be recycled, indicating that the method is sustainable, in addition to being simple and highly sensitive.

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Section: Resultssupporting

confidence: 86%

Electrochemiluminescence Detection of Sunset Yellow by Graphene Quantum Dots

et al. 2020

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“…Liquid Peeling Process Owing to their scalability, liquid peeling (LP) of the 2D materials has a great focusing. Further, LP is the best way to manufacture nanofilms with various advantages such as lowcost processing, ease of use, and reduced environmental effect [64]. Graphite is exfoliated into graphene sheets during this process as a precursor, so the LP process can acquire GQDs with strong crystallinity.…”

Section: Synthetic Routes Of Gqdsmentioning

confidence: 99%

“…Compared to GO nanosheets, GQDs exhibit many attractive properties resulting from their distinct structural characteristics. Firstly, GQDs are extremely stable in water dispersion and have strong film-forming properties, avoiding the insoluble GO problem in the coating [64]. Secondly, due to the tiny sizes of many nanometers, GQDs have a big number of edge structures.…”

Section: N-doping Gqds For Raising Corrosion Preventionmentioning

confidence: 99%

Outstanding Graphene Quantum Dots from Carbon Source for Biomedical and Corrosion Inhibition Applications: A Review

et al. 2021

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Graphene quantum dots (GQD) is an efficient nanomaterial composed of one or more layers of graphene with unique properties that combine both graphene and carbon dots (CDs). It can be synthesized using carbon-rich materials as precursors, such as graphite, macromolecules polysaccharides, and fullerene. This contribution emphasizes the utilization of GQD-based materials in the fields of sensing, bioimaging, energy storage, and corrosion inhibitors. Inspired by these numerous applications, various synthetic approaches have been developed to design and fabricate GQD, particularly bottom-up and top-down processes. In this context, the prime goal of this review is to emphasize possible eco-friendly and sustainable methodologies that have been successfully employed in the fabrication of GQDs. Furthermore, the fundamental and experimental aspects associated with GQDs such as possible mechanisms, the impact of size, surface alteration, and doping with other elements, together with their technological and industrial applications have been envisaged. Till now, understanding simple photo luminance (PL) operations in GQDs is very critical as well as there are various methods derived from the optical properties of manufactured GQDs can differ. Lack of determining exact size and morphology is highly required without loss of their optical features. Finally, GQDs are promising candidates in the after-mentioned application fields.

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“…The prototype monatomic material is graphene [73][74][75]. It is a crystalline allotrope of carbon in the form 2D hexagonal lattice consisting of a single layer of carbon atoms.…”

Section: Freestanding Monatomic Sheetsmentioning

confidence: 99%

“…Such is the case with many materials used to produce monolayers, e.g., graphene, various types of MXenes, etc. Single or multiple layers may be detached from the structure using the "Scotch tape" method, i.e., by literally sticking a piece of adhesive tape to the laminar structure with weak interlayer bonds and simply pulling it off, after which flakes of monatomic/monomolecular nanomaterial remain attached to the tape [75,105]. In other words, this kind of exfoliation is done in a purely mechanical way.…”

Section: Exfoliationmentioning

confidence: 99%

Biomimetic Nanomembranes: An Overview

Jakšić

2020

Biomimetics

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Nanomembranes are the principal building block of basically all living organisms, and without them life as we know it would not be possible. Yet in spite of their ubiquity, for a long time their artificial counterparts have mostly been overlooked in mainstream microsystem and nanosystem technologies, being a niche topic at best, instead of holding their rightful position as one of the basic structures in such systems. Synthetic biomimetic nanomembranes are essential in a vast number of seemingly disparate fields, including separation science and technology, sensing technology, environmental protection, renewable energy, process industry, life sciences and biomedicine. In this study, we review the possibilities for the synthesis of inorganic, organic and hybrid nanomembranes mimicking and in some way surpassing living structures, consider their main properties of interest, give a short overview of possible pathways for their enhancement through multifunctionalization, and summarize some of their numerous applications reported to date, with a focus on recent findings. It is our aim to stress the role of functionalized synthetic biomimetic nanomembranes within the context of modern nanoscience and nanotechnologies. We hope to highlight the importance of the topic, as well as to stress its great applicability potentials in many facets of human life.

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Scotch-tape-like exfoliation effect of graphene quantum dots for efficient preparation of graphene nanosheets in water

Cited by 52 publications

References 41 publications

Electrochemiluminescence Detection of Sunset Yellow by Graphene Quantum Dots

Electrochemiluminescence Detection of Sunset Yellow by Graphene Quantum Dots

Outstanding Graphene Quantum Dots from Carbon Source for Biomedical and Corrosion Inhibition Applications: A Review

Biomimetic Nanomembranes: An Overview

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