Chelation-enhanced fluorescence of phosphorus doped carbon nanodots for multi-ion detection

Omer, Khalid M.; Hassan, Aso Q.

doi:10.1007/s00604-017-2196-1

Cited by 80 publications

(40 citation statements)

References 31 publications

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“…From the XRD analysis, it was obtained that an obvious sharp peak at 2θ = 27.97° (crystalline peak) appears whereas a broad peak (an amorphous peak) lies at 42.63° as shown in Figure 20 . It has been explained that the sharp and broad peaks reflect crystalline phase (ordering structure) and amorphous phase (disordering structure), respectively [ 194 ]. An interesting observation in the spectra is the appearance of a peak at 2θ = 20° in pure PVA which can be attributed to the existence of semicrystalline structure [ 66 ].…”

Section: Carbon-based Nanomaterialsmentioning

confidence: 99%

A Comprehensive Review on Optical Properties of Polymer Electrolytes and Composites

et al. 2020

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Polymer electrolytes and composites have prevailed in the high performance and mobile marketplace during recent years. Polymer-based solid electrolytes possess the benefits of low flammability, excellent flexibility, good thermal stability, as well as higher safety. Several researchers have paid attention to the optical properties of polymer electrolytes and their composites. In the present review paper, first, the characteristics, fundamentals, advantages and principles of various types of polymer electrolytes were discussed. Afterward, the characteristics and performance of various polymer hosts on the basis of specific essential and newly published works were described. New developments in various approaches to investigate the optical properties of polymer electrolytes were emphasized. The last part of the review devoted to the optical band gap study using two methods: Tauc’s model and optical dielectric loss parameter. Based on recently published literature sufficient quantum mechanical backgrounds were provided to support the applicability of the optical dielectric loss parameter for the band gap study. In this review paper, it was demonstrated that both Tauc’s model and optical dielectric loss should be studied to specify the type of electron transition and estimate the optical band gap accurately. Other parameters such as absorption coefficient, refractive index and optical dielectric constant were also explored.

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Section: Carbon-based Nanomaterialsmentioning

confidence: 99%

A Comprehensive Review on Optical Properties of Polymer Electrolytes and Composites

et al. 2020

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“…A lot of research has been done so far to reduce the flame‐retardant behavior of various polymers by forming their composites with organic and inorganic nanoparticles (NPs). Kashiwagi et al and Loautid et al independently reported enhancement in flame‐retardant properties of different polymers with blended NPs . Their synthesized composites showed a decrease in pHRR and an increase in ignition time while the total heat release rate (THRR) was unchanged.…”

Section: Resultsmentioning

confidence: 99%

“…The same effects and changes in the thermal properties of pure PVA and its composites with CNPs were observed in the differential thermal gravimetric (DTGA) graphs. DTGA is a plot of the first derivative of the TGA curve (dw/dT) against temperature . It records minor changes in phase in the form of peaks as shown in Figure b.…”

Section: Resultsmentioning

confidence: 99%

Carbon nanoparticles/polyvinyl alcohol composites with enhanced optical, thermal, mechanical, and flame‐retardant properties

Zahid

Ali

Saleem

et al. 2020

J of Applied Polymer Sci

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In this work, polyvinyl alcohol (PVA) is chemically bonded to carbon nanoparticles (CNPs) by a very simple and versatile solution casting method. Five different kinds of CNPs/PVA composite films were prepared; 0.5, 1.0, 1.5, 2.0, and 3.0 wt% CNPs dispersed in PVA. The as‐prepared samples were characterized using various characterization techniques. The resulting nanocomposites proved to possess homogeneity and better mechanical, thermal, optical, and flame‐retardant properties than pure PVA. Most of the CNPs with average particle size ≤100 nm were homogeneously dispersed in the PVA matrix showing fluorescence in the violet color zone. The crystallinity of the nanocomposites show a decline in the diffraction intensity as compared to pure PVA which results from the dwelling of CNPs inside the gaps of stacked‐layer chains of PVA. The mechanical properties of nanocomposites indicated enhancement in toughness, elastic modulus and tensile strength with an increase in CNPs contents. The assessment for flame‐retardant properties was carried out through cone calorimetry. The results show a decrease in both total heat release rate (THRR) and peak heat release rate (pHRR) of the resulting nanocomposites as compared to pure PVA. The superior properties of the CNPs/PVA composites stemmed from the good interfacial bonding between the CNPs and PVA matrix.

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“…Various approaches have been applied for preparing diverse types of CDs, e.g., laser ablation [65], solvothermal [66], hydrothermal synthesis [67], microwave-assisted [68], arc discharge [69], acidic oxidation [70], and more chemical and physical approaches [71,72]. Additionally, CDs display a desirable prospect for various applications, such as biological imaging [73], chemical and biosensing [74][75][76][77], targeted drug delivery [78], pharmaceutical analysis [79], and catalysis [80,81]. Carbon dots have been extensively reviewed in term of synthesis, physicochemical properties, as well as their potential applications.…”

Section: Carbon Dots As Nanothermometersmentioning

confidence: 99%

Carbon Dots as New Generation Materials for Nanothermometer: Review

Mohammed

Omer

2020

Nanoscale Res Lett

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Highly sensitive non-contact mode temperature sensing is substantial for studying fundamental chemical reactions, biological processes, and applications in medical diagnostics. Nanoscale-based thermometers are guaranteeing non-invasive probes for sensitive and precise temperature sensing with subcellular resolution. Fluorescence-based temperature sensors have shown great capacity since they operate as “non-contact” mode and offer the dual functions of cellular imaging and sensing the temperature at the molecular level. Advancements in nanomaterials and nanotechnology have led to the development of novel sensors, such as nanothermometers (novel temperature-sensing materials with a high spatial resolution at the nanoscale). Such nanothermometers have been developed using different platforms such as fluorescent proteins, organic compounds, metal nanoparticles, rare-earth-doped nanoparticles, and semiconductor quantum dots. Carbon dots (CDs) have attracted interest in many research fields because of outstanding properties such as strong fluorescence, photobleaching resistance, chemical stability, low-cost precursors, low toxicity, and biocompatibility. Recent reports showed the thermal-sensing behavior of some CDs that make them an alternative to other nanomaterials-based thermometers. This kind of luminescent-based thermometer is promising for nanocavity temperature sensing and thermal mapping to grasp a better understanding of biological processes. With CDs still in its early stages as nanoscale-based material for thermal sensing, in this review, we provide a comprehensive understanding of this novel nanothermometer, methods of functionalization to enhance thermal sensitivity and resolution, and mechanism of the thermal sensing behavior.

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Chelation-enhanced fluorescence of phosphorus doped carbon nanodots for multi-ion detection

Cited by 80 publications

References 31 publications

A Comprehensive Review on Optical Properties of Polymer Electrolytes and Composites

A Comprehensive Review on Optical Properties of Polymer Electrolytes and Composites

Carbon nanoparticles/polyvinyl alcohol composites with enhanced optical, thermal, mechanical, and flame‐retardant properties

Carbon Dots as New Generation Materials for Nanothermometer: Review

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