New nano-composite based on carbon dots (CDots) decorated magnesium oxide (MgO) nano-particles (CDots@MgO) sensor for high H2S gas sensitivity performance

El-Shamy, Ahmed G.

doi:10.1016/j.snb.2020.129154

Cited by 48 publications

(36 citation statements)

References 70 publications

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“…Recently, several gas sensors involving the use of CDs were reported. For instance, El-Shamy designed a CDs-functionalized magnesium oxide (MgO) nano-particle (CDs@MgO) sensor for sensing hydrogen sulfide (H 2 S) gas [282], Ramos-Ramón et al developed a N-CDs based sensor for CO 2 [283], Wang et al fabricated silica aerosol-modified CDs-based gas sensor for NO 2 monitoring [284], and Carbone prepared a CDs-assembled nickel oxide (NiO)-based sensor for methane gas detection [285]. However, most of the CDs-based gas sensors reported to date were developed for environmental monitoring and safety, it is speculated that CDs-based gas sensors will be a promising research area in the near future for serving biomedical applications as well.…”

Section: Cdsmentioning

confidence: 99%

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

2021

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Carbon dots (CDs) are usually smaller than 10 nm in size, and are meticulously formulated and recently introduced nanomaterials, among the other types of carbon-based nanomaterials. They have gained significant attention and an incredible interest in the field of nanotechnology and biomedical science, which is merely due to their considerable and exclusive attributes; including their enhanced electron transferability, photobleaching and photo-blinking effects, high photoluminescent quantum yield, fluorescence property, resistance to photo-decomposition, increased electrocatalytic activity, good aqueous solubility, excellent biocompatibility, long-term chemical stability, cost-effectiveness, negligible toxicity, and acquaintance of large effective surface area-to-volume ratio. CDs can be readily functionalized owing to the abundant functional groups on their surfaces, and they also exhibit remarkable sensing features such as specific, selective, and multiplex detectability. In addition, the physico-chemical characteristics of CDs can be easily tunable based on their intended usage or application. In this comprehensive review article, we mainly discuss the classification of CDs, their ideal properties, their general synthesis approaches, and primary characterization techniques. More importantly, we update the readers about the recent trends of CDs in health care applications (viz., their substantial and prominent role in the area of electrochemical and optical biosensing, bioimaging, drug/gene delivery, as well as in photodynamic/photothermal therapy).

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Section: Cdsmentioning

confidence: 99%

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

2021

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“…Theoretical as well as experimental work has been carried to study the interaction, charge transfer between dopant on GQD and gas molecule and variation in the binding energy of target gas molecule to GQD and its band gap [101]. Nanoscale engineering of p-p, n-n, and p-n heterojunctions with carbon-based materials (Carbon nanotube, graphene, graphene oxide, CDs) and MOs is an effective method to improve sensor response at room temperature [67,98]. Such a nano heterojunction serves as carrier reservoirs.…”

Section: View Article Onlinementioning

confidence: 99%

“…In p-type materials, adsorption of oxygen on the surface on exposure to atmosphere captures electrons from the sensor, thus decreasing its resistance [4,20,27]. Adsorbed oxygen species are generally molecular ions at low temperature and atomic ions at higher temperature formed by the following reactions [79,98,99,100].…”

Section: P-typementioning

confidence: 99%

Recent development in carbon dot-based gas sensors

Swathilakshmi

Anandhan

2022

Sens. Diagn.

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“…Across the sensor spectrum, one of the most prominently studied gases is hydrogen sulfide [ 126 ], which can occur as a minor component of biogas. El Shamy [ 127 ] presented the design of his C Dots @MgO sensor working on the Schottky junction principle. The hydrothermal approach was used to synthesize MgO, and microwave heating was used to synthesize C Dots .…”

Section: Selected Technical Applications Of Magnesium Oxidementioning

confidence: 99%

Synthesis, Properties, and Selected Technical Applications of Magnesium Oxide Nanoparticles: A Review

Hornak

2021

IJMS

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In the last few decades, there has been a trend involving the use of nanoscale fillers in a variety of applications. Significant improvements have been achieved in the areas of their preparation and further applications (e.g., in industry, agriculture, and medicine). One of these promising materials is magnesium oxide (MgO), the unique properties of which make it a suitable candidate for use in a wide range of applications. Generally, MgO is a white, hygroscopic solid mineral, and its lattice consists of Mg2+ ions and O2− ions. Nanostructured MgO can be prepared through different chemical (bottom-up approach) or physical (top-down approach) routes. The required resultant properties (e.g., bandgap, crystallite size, and shape) can be achieved depending on the reaction conditions, basic starting materials, or their concentrations. In addition to its unique material properties, MgO is also potentially of interest due to its nontoxicity and environmental friendliness, which allow it to be widely used in medicine and biotechnological applications.

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New nano-composite based on carbon dots (CDots) decorated magnesium oxide (MgO) nano-particles (CDots@MgO) sensor for high H2S gas sensitivity performance

Cited by 48 publications

References 70 publications

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

Carbon Dots: Classification, Properties, Synthesis, Characterization, and Applications in Health Care—An Updated Review (2018–2021)

Recent development in carbon dot-based gas sensors

Synthesis, Properties, and Selected Technical Applications of Magnesium Oxide Nanoparticles: A Review

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