You Don’t Learn That in School: An Updated Practical Guide to Carbon Quantum Dots

Sousa, Helena B. A.; Martins, Catarina S. M.; Prior, João A.V.

doi:10.3390/nano11030611

Cited by 41 publications

(11 citation statements)

References 226 publications

(112 reference statements)

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“…As far as the available studies are concerned, regardless of the preparation methods of CDs, the obtained CDs inevitably contain impurities with varying solubility and sizes, such as unreacted precursors, oligomers, or polymers, amorphous carbon or carbon particles. Attempts to interpret reactions or formation mechanisms using unpurified or inadequately purified CDs lead to misinformation of data or warped data interpretation, [ 25 ] and the function mechanism of CDs cannot be clearly elucidated in some cases due to the inability to exclude the contribution of impurities contained in CDs samples to the applied performance, [ 26 ] or worse, directly impact the potential use of CDs in certain applications. [ 27 ]…”

Section: Problems Existing In Large‐scale Production For Cdsmentioning

confidence: 99%

Facile Access to Fabricate Carbon Dots and Perspective of Large‐Scale Applications

Chen

Wang

Liu

et al. 2022

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Carbon dots (CDs), fluorescent carbon nanoparticles with particle sizes < 10 nm, are constantly being developed for potential large‐scale applications. Recently, methods allow CD synthesis to be carried out on large‐scale preparation in a controlled fashion are potentially important for multiple disciplines, including bottom‐up strategy, top‐down method. In this review, the recent progresses in the research of the methods for large‐scale production of CDs and their functionalization are summarized. Especially, the methods of CD synthesis, such as large‐scale preparation, hydrothermal/solvothermal, microwave‐assisted, magnetic hyperthermia microfluidic and other methods, along with functionalization of CDs, are summarized in detail. By promising applications of CDs, there are three aspects have been already reported, such as enhancing mechanical properties, flame retardancy, and energy storage. Also, future development of CDs is prospected.

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Section: Problems Existing In Large‐scale Production For Cdsmentioning

confidence: 99%

Facile Access to Fabricate Carbon Dots and Perspective of Large‐Scale Applications

Chen

Wang

Liu

et al. 2022

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“…Graphene quantum dots (GQDs) have emerged as a beneficial derivative of graphene that is more suitable for applications such as photovoltaics, transistors, and light-emitting diodes due to its tunable band gap feature as a result of the quantum confinement effect [ 92 , 93 , 94 ]. GQDs have sizes not exceeding 10 nm with thickness ranging from one to five layers of graphene.…”

Section: Graphene Nanostructures Prepared By Plalmentioning

confidence: 99%

Graphene Nanostructures by Pulsed Laser Ablation in Liquids: A Review

Al-Tuwirqi

2022

Materials

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High-quality graphene has demonstrated remarkable mechanical, thermal, electronic, and optical properties. These features have paved the road for the introduction of graphene into numerous applications such as optoelectronics and energy devices, photodegradation, bioimaging, photodetectors, sensors, and biosensors. Due to this, graphene research has accelerated exponentially, with the aim of reaching a sustainable large-scale production process of high-quality graphene that can produce graphene-based technologies at an industrial scale. There exist numerous routes for graphene fabrication; however, pulsed laser ablation in liquids (PLAL) has emerged as a simple, fast, green, and environmentally friendly method as it does not require the use of toxic chemicals. Moreover, it does not involve the use of expensive vacuum chambers or clean rooms. However, the great advantage of PLAL is its ability to control the size, shape, and structure of the produced nanostructures through the choice of laser parameters and liquid used. Consequently, this review will focus on recent research on the synthesis of graphene nanosheets and graphene quantum dots via PLAL and the effect of experimental parameters such as laser wavelength, pulse width, pulse energy, repetition rate, irradiation time, and liquid media on the produced nanostructures. Moreover, it will discuss extended PLAL techniques which incorporate other methods into PLAL. Finally, different applications that utilize nanostructures produced by PLAL will be highlighted. We hope that this review will provide a useful guide for researchers to further develop the PLAL technique and the fabrication of graphene-based materials.

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“…Oligopeptide separations by reversed-phase high-performance liquid chromatography (RP-HPLC) are extremely common ( Ofosu et al, 2021 ; Samtiya et al, 2021 ; Waili et al, 2021 ), and the chromatographic retention of oligopeptides in RP-HPLC is driven by hydrophobic interactions ( Sousa et al, 2021 ). Combining the molecular structure of compounds with the parameters describing the properties of chromatographic mobile and stationary phases, functional relationships could be obtained ( Nie et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous effect of different chromatographic conditions on the chromatographic retention of pentapeptide derivatives (HGRFG and NPNPT)

et al. 2023

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Introduction: Oligopeptides exhibit great prospects for clinical application and its separation is of great importance in new drug development.Methods: To accurately predict the retention of pentapeptides with analogous structures in chromatography, the retention times of 57 pentapeptide derivatives in seven buffers at three temperatures and four mobile phase compositions were measured via reversed-phase high-performance liquid chromatography. The parameters (kHA, kA, and pKa) of the acid–base equilibrium were obtained by fitting the data corresponding to a sigmoidal function. We then studied the dependence of these parameters on the temperature (T), organic modifier composition (φ, methanol volume fraction), and polarity (PmN parameter). Finally, we proposed two six-parameter models with (1) pH and T and (2) pH and φ or PmN as the independent variables. These models were validated for their prediction capacities by linearly fitting the predicted retention factor k-value and the experimental k-value.Results: The results showed that logkHA and logkA exhibited linear relationships with 1/T, φ or PmN for all pentapeptides, especially for the acid pentapeptides. In the model of pH and T, the correlation coefficient (R2) of the acid pentapeptides was 0.8603, suggesting a certain prediction capability of chromatographic retention. Moreover, in the model of pH and φ or PmN, the R2 values of the acid and neutral pentapeptides were greater than 0.93, and the average root mean squared error was approximately 0.3, indicating that the k-values could be effectively predicted.Discussion: In summary, the two six-parameter models were appropriate to characterize the chromatographic retention of amphoteric compounds, especially the acid or neutral pentapeptides, and could predict the chromatographic retention of pentapeptide compounds.

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You Don’t Learn That in School: An Updated Practical Guide to Carbon Quantum Dots

Cited by 41 publications

References 226 publications

Facile Access to Fabricate Carbon Dots and Perspective of Large‐Scale Applications

Facile Access to Fabricate Carbon Dots and Perspective of Large‐Scale Applications

Graphene Nanostructures by Pulsed Laser Ablation in Liquids: A Review

Simultaneous effect of different chromatographic conditions on the chromatographic retention of pentapeptide derivatives (HGRFG and NPNPT)

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