Imaging of Bacterial and Fungal Cells Using Fluorescent Carbon Dots Prepared from Carica papaya Juice

Kasibabu, Betha Saineelima B.; D'souza, Stephanie L.; Jha, Sanjay Kumar; Kailasa, Suresh Kumar

doi:10.1007/s10895-015-1595-0

Cited by 137 publications

(48 citation statements)

References 38 publications

(36 reference statements)

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“…The QY of the orange waste peel CQDs was 11.37% at excitation wavelength 330 nm. This was due to the presence of carboxylic groups, which play a key role in the generation of CDs with high quantum yield . Synthesized CQDs were compared with various natural precursors for fluorescence colour, size, quantum yield, and various applications, summarized in Supporting Information Table S1.…”

Section: Resultsmentioning

confidence: 99%

“…Among various nonlinear optical materials, ‘green' carbon source CDs have shown the maximum nonlinear optical properties. Recent articles have demonstrated CQD synthesis using many natural materials and with an option to re‐use natural waste . Orange waste peels are underused natural resources and it is still challenging to use these leftover residues effectively.…”

Section: Introductionmentioning

confidence: 99%

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Facile preparation of high fluorescent carbon quantum dots from orange waste peels for nonlinear optical applications

et al. 2019

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A facile and eco‐friendly hydrothermal method was used to prepare carbon quantum dots (CQDs) using orange waste peels. The synthesized CQDs were well dispersed and the average diameter was 2.9 ± 0.5 nm. Functional group identification of the CQDs was confirmed by Fourier transform infrared spectrum analysis. Fluorescence properties of the synthesized CQDs exhibited blue emission. The fluorescence quantum yield of the CQDs was around 11.37% at an excitation wavelength of 330 nm. The higher order nonlinear optical properties were examined using a Z‐scan technique and a continuous wave laser that was operated at a wavelength of 532 nm. Results demonstrated that the synthesis of CQDs can be considered as promising for optical switching devices, bio‐scanning, and bio‐imaging for optoelectronic applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facile preparation of high fluorescent carbon quantum dots from orange waste peels for nonlinear optical applications

et al. 2019

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“…HTC is a carbon nanomaterial synthesis technology, which has been widely used in many fields . HTC has been used to prepare novel carbon‐based materials from biomass carbon precursors such as sweet pepper, garlic, husks of nuts, papaya juice, rice husk, and other biomass materials …”

Section: Methods For the Synthesis Of Bcdsmentioning

confidence: 99%

“…In recent years, various biomass has been used as carbon sources to prepare BCDs ( Figure ). The biomass used includes walnut peel, garlic, papaya juice, rice husk, winter melon, lychee seeds, goose feather, silkworm chrysalis, bee pollen, milk, Phyllanthus acidus, and baked lamb . BCDs prepared using biomass have been applied to biological imaging, sensors, drug delivery, and other applications ( Scheme ).…”

Section: Introductionmentioning

confidence: 99%

Biomass‐Derived Carbon Dots and Their Applications

Meng

Bai

Wang

et al. 2019

Energy & Environ Materials

324

172

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Carbon dots (CDs) have received much attention due to their superior properties including water solubility, low toxicity, biocompatibility, small size, fluorescence, and ease of modification. The use of a more environmentally friendly method to prepare high‐quality CDs is still an urgent question waiting for solve. The use of renewable, inexpensive, and green biomass resources not only meets the urgent need for large‐scale synthesis biomass CDs (BCDs), but also promotes the development of sustainable applications. In this article, we summarize the representative methods for synthesizing BCDs in green and simple ways using biomass as a carbon source, including hydrothermal carbonization, and microwave, pyrolysis. The prepared BCDs have a uniform particle size distribution and a relatively high throughput, which provide a method to scale up industrial production. Moreover, the integration of specific optical properties, that is, tunable photoluminescence and up‐photoluminescence, has led to remarkable use in bioimaging, sensing, and drug delivery. But the current review is not particularly comprehensive for BCDs. Therefore, we now provide a review focusing on the synthesis, properties, and recent advances in BCDs in biosensing, bioimaging, optoelectronics, and catalytic applications.

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“…They also exhibit strong two-photon absorption, allowing their application for both, one-photon and two-photon microscopy. Non-specific and targeted imaging has been shown for C-dots, which have been uptaken by multiple kinds of cells, including bacterial and fungal cells [107], HeLa cells [108], fibroblast cells [109], and stem cells [110]. On the other hand, NIR-emitting persistent luminescence nanoparticles have also been applied in cellular imaging.…”

Section: Optical Imaging (Oi)mentioning

confidence: 99%