Functional group inhomogeneity in graphene oxide using correlative absorption spectroscopy

Yoo, Jaekak; Lee, Seung Mi; Lee, Kyoungeun; Lim, Seong Chu; Jeong, Mun Seok; Kim, Jaeseok; Lee, Tae Geol

doi:10.1016/j.apsusc.2022.155885

Cited by 10 publications

(5 citation statements)

References 60 publications

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“…Quantum mechanical simulations can facilitate the understanding of various physical properties by modeling the actual situation, rather than relying on empirical methods . Specifically, first-principles calculations using DFT enable the estimation of electronic interactions occurring at the atomic scale. − For example, Fukui functions can be used to identify the electrophilic and nucleophilic sites as well as to visualize the electrostatic potential (ESP) of molecular systems by providing information on charge distribution . In addition, the activation energies for chemical reactions such as protonation can be estimated, which can provide valuable chemical information to the studies of mass spectrometry. , …”

Section: Resultsmentioning

confidence: 99%

Role of Chalcogenides in Sensitive Therapeutic Drug Monitoring Using Laser Desorption and Ionization

Joh,

Yoo,

Lee

et al. 2024

ACS Nano

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Section: Resultsmentioning

confidence: 99%

Role of Chalcogenides in Sensitive Therapeutic Drug Monitoring Using Laser Desorption and Ionization

Joh,

Yoo,

Lee

et al. 2024

ACS Nano

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“…CNMs possess extraordinary optical properties that position them as highly useful fluorescent probes. Ultraviolet–visible-near infrared (UV–vis-NIR) spectroscopy is a powerful tool elucidating the diverse light absorption and fluorescent emission profiles of CDs, , CNTs, , nanohoops, ,, nanoribbons, , fullerenes, and GO . UV–vis-NIR characterization facilitates the acquisition of comprehensive chemical absorption profiles, an invaluable technique to determine quantum yields (Figure A).…”

Section: Carbon Nanomaterials Synthesis and Characterizationmentioning

confidence: 99%

“…Ultraviolet−visible-near infrared (UV−vis-NIR) spectroscopy is a powerful tool elucidating the diverse light absorption and fluorescent emission profiles of CDs, 45,51 CNTs, 25,31 nanohoops, 78,82,88 nanoribbons, 133,135 fullerenes, 176 and GO. 177 UV−vis-NIR characterization facilitates the acquisition of comprehensive chemical absorption profiles, an invaluable technique to determine quantum yields (Figure 6A). Moreover, when paired with emission profiles, it provides insights for the fine-tuning of the fluorescent properties of CNMs, particularly important for those that have undergone selective chemical modifications (Figure 6B).…”

Section: Optical Characterizationmentioning

confidence: 99%

Carbon Nanomaterial Fluorescent Probes and Their Biological Applications

Krasley,

Li,

Galeana

et al. 2024

Chem. Rev.

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Fluorescent carbon nanomaterials have broadly useful chemical and photophysical attributes that are conducive to applications in biology. In this review, we focus on materials whose photophysics allow for the use of these materials in biomedical and environmental applications, with emphasis on imaging, biosensing, and cargo delivery. The review focuses primarily on graphitic carbon nanomaterials including graphene and its derivatives, carbon nanotubes, as well as carbon dots and carbon nanohoops. Recent advances in and future prospects of these fields are discussed at depth, and where appropriate, references to reviews pertaining to older literature are provided.

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“…Among them, PRGO was produced by Tour's improved method [61]. It is well known that graphite oxide (GO) has a hexagonal carbon structure similar to graphene and contains functional groups, such as hydroxyl, alkoxy, carbonyl, and carboxylic acid [62,63]. According to Li et al's study, the analysis of infrared spectroscopy results revealed that the GO structure exhibited a higher concentration of oxygen-containing functional groups compared with the reduced graphene oxide hybrid hydrogel (GA).…”

Section: Introductionmentioning

confidence: 99%

The application of magnesium nitrate hexahydrate/hybrid carbon material phase change composites in solar thermal storage

Shih

Liao

Tsai

et al. 2023

J Chinese Chemical Soc

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BackgroundIn this study, a series of phase change composites were developed. Phase change materials (PCMs) are substances with a high heat of fusion, thereby possessing great potential for solar thermal storage. However, their disadvantages, such as low thermal conductivity, phase separation, and supercooling, limit their further applications.ObjectiveIn this study, magnesium nitrate hexahydrate (MNH) was used as the phase change material, and different proportions of photothermal materials were added to improve the thermally conductive property and solar thermal storage efficiency of MNH.MethodsThis study used magnesium nitrate hexahydrate (MNH) as the substrate. In addition, different proportions of photothermal materials (carbon nanotubes, nano‐graphite, graphene, and partially reduced graphene oxide) were added to promote the efficiency of thermal energy storage. Additionally, a fixed ratio of carboxy methyl cellulose (CMC) was added. The phase change temperature and enthalpy change of the phase change material samples were explored and analyzed by differential scanning calorimeter (DSC). In addition, the thermophysical properties, photothermal storage performance, and thermal reliability analysis of the samples were investigated.ResultsThe results showed that the PCM composites prepared with nano‐graphite have higher latent heat and longer time of phase change. However, the composites prepared with carbon nanotubes (CNTs) have lower latent heat and a shorter time of phase change. Therefore, the partially reduced graphite oxide (PRGO)‐containing composites can retain the latent heat storage capacity of nano‐graphite and decrease the time of phase change, thereby improving the photothermal storage efficiency. The results reveal that the solar thermal storage efficiency of the composite with both CNTs and PRGO could reach up to 0.716.ConclusionsMCGOT‐1 and MCGOT‐2 have high latent heat values, and the phase transition time is short. Therefore, the thermal energy storage efficiency can be as high as 0.716. In addition, compared with related literature, the photothermal storage efficiency of MCGOT‐2 increased by about 2 times. Therefore, the environmentally friendly composites developed in this study have a high potential to be used in solar energy storage and energy‐saving systems.

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Functional group inhomogeneity in graphene oxide using correlative absorption spectroscopy

Cited by 10 publications

References 60 publications

Role of Chalcogenides in Sensitive Therapeutic Drug Monitoring Using Laser Desorption and Ionization

Role of Chalcogenides in Sensitive Therapeutic Drug Monitoring Using Laser Desorption and Ionization

Carbon Nanomaterial Fluorescent Probes and Their Biological Applications

The application of magnesium nitrate hexahydrate/hybrid carbon material phase change composites in solar thermal storage

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