Facile preparation of aqueous-soluble fluorescent polyethylene glycol functionalized carbon dots from palm waste by one-pot hydrothermal carbonization for colon cancer nanotheranostics

Sangjan, Amornrat; Boonsith, Suthida; Sansanaphongpricha, Kanokwan; Thinbanmai, Tapanee; Ratchahat, Sakhon; Laosiripojana, Navadol; Wu, Kevin Chien-Chang; Shin, Hyeon Suk; Sakdaronnarong, Chularat

doi:10.1038/s41598-022-14704-x

Cited by 26 publications

(13 citation statements)

References 73 publications

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“…Specifically, the emission wavelengths range from 460 to 510 nm for samples without and with NaOH, respectively. However, this slight variation in the emission wavelength does not result in a noticeable change in the emitted color of the produced carbon dots under UV light [41, 42, 44, 49, 55].…”

Section: Resultsmentioning

confidence: 99%

“…In this paper, we report the synthesis of photoluminescent carbon dots using a nontoxic biopolymer, polyethylene glycol (PEG) via the one-step hydrothermal method. Common hydrothermal synthesis reported in the literature is usually done at higher temperatures (>200 C) and for a longer time (>12 h) [31,[44][45][46][47]. Here we presented a faster route (6 h) by introducing ultrasonication and alkalinity into the usual hydrothermal synthesis to produce photoluminescent carbon dots using PEG as the lone carbon precursor.…”

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confidence: 99%

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Facile one‐pot synthesis of PEG‐derived carbon dots with enhanced luminescence via L‐cysteine‐assisted S,N‐doping

Juan‐Corpuz

Corpuz

2023

J Chinese Chemical Soc

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Carbon nanodots (C‐dots) are promising photoluminescent nanomaterials for biomedical applications. Among them, PEG‐derived C‐dots demonstrate exceptional photoluminescence and passivation properties, making them particularly attractive for use in the biomedical field. In this article, we present the synthesis of photoluminescent S,N‐doped PEG‐derived carbon dots that are stable at ambient temperature and can be produced using an easy hydrothermal technique. To synthesize the carbon dots, the non‐hazardous polymer polyethylene glycol (PEG) was used as the sole precursor rather than any other potentially hazardous compounds. The absence of L‐cysteine in the reaction mixture resulted in carbon dots with no significant absorbance in the visible region but exhibited photoluminescence properties with a maximum excitation and emission at 343 and 452 nm, respectively. However, the addition of L‐cysteine resulted in a visible absorbance and a red shift in both the maximum excitation and emission, at around 435 and 503 nm, respectively. The Fourier transform infrared spectroscopy (FTIR) analysis provided evidence for the presence of ‐SH, ‐SO2, ‐NH2, and CON‐H bond stretching after the addition of L‐cysteine, suggesting possible S,N‐doping of the carbon dots, which likely caused the observed changes in photoluminescence properties. These findings contribute to the understanding of S,N‐doping in carbon dots and highlight their potential applications in optoelectronics, sensing, and biomedical imaging.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Facile one‐pot synthesis of PEG‐derived carbon dots with enhanced luminescence via L‐cysteine‐assisted S,N‐doping

Juan‐Corpuz

Corpuz

2023

J Chinese Chemical Soc

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“…Such difference in the fluorescence signal can be due to the enhanced stability and better dispersion of C-dots facilitated by the presence of PEG200. PEG is a hydrophilic polymer with excellent solubility in water and other polar solvents and is recognized for its ability to improve the solubility and dispersibility of C-dots in aqueous solutions. , When PEG is added to a C-dot dispersion, it would act as a stabilizing agent and prevents the aggregation or agglomeration of C-dots. PEG molecules form a protective layer around the C-dots, contributing to particle stability due to a steric hindrance.…”

Section: Resultsmentioning

confidence: 99%

Encapsulation of Carbon Dots in a Core–Shell Mesh through Coaxial Direct Ink Writing for Improved Crop Growth

Arel,

Ay,

Wang

et al. 2023

ACS Sustainable Chem. Eng.

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Through coaxial direct ink writing, we fabricated a core−shell mesh system for the controlled release of carbon dots (C-dots). In the core ink, we developed an ink formulation with tuned viscosity using hydroxypropyl cellulose and polyethylene glycol to host C-dots. Polycaprolactone was employed as the main shell material, in combination with sodium alginate, to control the degradation rate of the shell. We investigated the degradation profile of the 3D-printed meshes and tracked the weekly release of C-dots in an aqueous medium by spectrofluorometry. We tested the efficacy of the C-dot release on plants by placing the meshes in transparent soil with Triticum aestivum L. seeds. We observed the in vivo translocation of the C-dots in the plant using confocal microscopy. We measured the root elongation and shoot length to assess the effect of C-dots on plant growth. Our study revealed that the plants exposed to C-dots grew 2.5-fold faster than the control group, indicating that C-dots are promising nanofertilizers for aggrotech and non-toxic fluorescent biolabels for in vivo applications.

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“…However, the use of water as a solvent is not practical, mostly due to the large absorption peaks of water in the infrared region. The FTIR spectra of hydrothermal synthesized CQDs showed the presence of carboxyl, hydroxyl, epoxy and ester functional groups on the surface [92]. Additionally, FTIR spectroscopy allows a complete characterization of the functional groups on the sample surface, leading to a better knowledge of the mechanisms underlying PL in a specific wavelength range [93].…”

Section: The Fourier Transform Infrared (Ftir)mentioning

confidence: 99%

Hydrothermal Synthesis of Carbon Quantum Dots: An Updated Review

Nazibudin

Zainuddin²,

Abdullah³

2023

ARFMTS

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Carbon Quantum Dots (CQDs) have exceptionally solid and tuneable fluorescence properties which empower their application in vast fields. The hydrothermal approach is regarded as direct and efficient, through polymerization and carbonization reactions, and has been widely applied to prepare various materials due to the high reactivity of the reactants, easy control of the solution, little harm to the environment and low energy consumption under hydrothermal condition. The attracting feature of this route is that neither any strong acid nor post-synthetic surface passivation is necessary. As of now, a lot of important progress in the hydrothermal synthesis of carbon quantum dots such as materials use as precursors and influence of hydrothermal synthesis parameters. Hydrothermal synthesis is one of the most commonly used methods for preparation of nanomaterials. It is basically a solution reaction-based approach. In this review, the main focus is to review the hydrothermal route for carbon quantum dots using different source of materials and their fundamental characterizations, followed by the influence of hydrothermal synthesis conditions to carbon quantum dots.

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Facile preparation of aqueous-soluble fluorescent polyethylene glycol functionalized carbon dots from palm waste by one-pot hydrothermal carbonization for colon cancer nanotheranostics

Cited by 26 publications

References 73 publications

Facile one‐pot synthesis of PEG‐derived carbon dots with enhanced luminescence via L‐cysteine‐assisted S,N‐doping

Facile one‐pot synthesis of PEG‐derived carbon dots with enhanced luminescence via L‐cysteine‐assisted S,N‐doping

Encapsulation of Carbon Dots in a Core–Shell Mesh through Coaxial Direct Ink Writing for Improved Crop Growth

Hydrothermal Synthesis of Carbon Quantum Dots: An Updated Review

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