A review on plant derived carbon quantum dots for bio-imaging

Maurya, Dheeraj Kumar; Saikia, Madhurjya; Navaneethan, R; Angaiah, Subramania

doi:10.1039/d3ma00254c

Cited by 24 publications

(1 citation statement)

References 117 publications

(144 reference statements)

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“…Similar to Ag NPs, CuO NPs are incorporated into biomedical applications for their antimicrobial properties , and can catalyze the decomposition of organic pollutants in wastewater. − They have also found use as gas sensors to detect nitric oxide and hydrogen sulfide and have been explored in agricultural applications since they can serve as nanofertilizers or nanopesticides due to their fungicidal and bactericidal properties. , ZnO NPs are most known for their presence in sunscreens and other cosmetics as they effectively block ultraviolet light waves. − Other common uses of ZnO NPs include the degradation of synthetic dyes in water, removal of heavy metals such as lead and chromium from water, , and incorporation into dye-sensitized solar cells for improved solar cell efficiency. , They have also been effective as nanofertilizers that promote plant growth and mitigate plant stress at low concentrations, although excessive application can lead to toxic effects on the plant and have negative consequences on the surrounding soil microbial communities. , Lastly, inorganic NPs, such as CdSe QDs, are popular in consumer products because of their tunable emission wavelength, high quantum yields, and greater photostability when compared with traditional organic dye molecules. For these reasons, QDs are often present in LED displays, − and they have been utilized for in vivo and in vitro biological imaging. − As another application, Cd-based QDs have been incorporated into biosensors that can detect mutation changes within DNA fragments for lung cancer diagnosis or for the detection of microRNAs that serve as cancer biomarkers for ovarian and prostate cancer . It is evident from the examples above that there is a wide range of applications for these NPs with some intentionally being applied in the environment (agricultural applications), while other NPs can unintentionally enter the environment (washing off textiles, improper disposal, etc.…”

Section: Introductionmentioning

confidence: 99%

Review of Oxidative Dissolution and Sulfidation of Select Nanoparticles in the Environment: Impact on Applications

O’Keefe,

Haynes

2024

ACS Appl. Nano Mater.

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Nanoparticles (NPs) are increasingly being used in medical, electronic, energy, and agricultural applications due to their unique properties that often arise due to the high surface area-to-volume ratio. However, this characteristic along with the high reactivity of NPs make these materials highly dynamic in environmental settings. Thus, several transformations can take place when these materials enter the environment that determines their transport, toxicity, and fate of them in our environment. These transformations, and more specifically oxidative dissolution and sulfidation, are directly impacted by the characteristics that a NP has in addition to the surrounding environmental conditions. Therefore, this review aims to summarize how NP characteristics (size, coatings, etc.) and other important environmentally relevant conditions (oxic/anoxic waters, natural organic matter, etc.) impact the oxidative dissolution and sulfidation of several metal and metal oxide NPs. The impact of these factors is crucial to understanding and predicting the environmental risks of these materials in a wide range of applications.

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Section: Introductionmentioning

confidence: 99%

Review of Oxidative Dissolution and Sulfidation of Select Nanoparticles in the Environment: Impact on Applications

O’Keefe,

Haynes

2024

ACS Appl. Nano Mater.

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Emergence of Quantum Dots as Innovative Tools for Early Diagnosis and Advanced Treatment of Breast Cancer

Díaz‐García,

Díaz‐Sánchez,

Álvarez‐Conde

et al. 2024

ChemMedChem

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Quantum dots (QDs) semiconducting nanomaterials, have garnered attention due to their distinctive properties, including small size, high luminescence, and biocompatibility. In the context of triple‐negative breast cancer (TNBC), notorious for its resistance to conventional treatments, QDs exhibit promising potential for enhancing diagnostic imaging and providing targeted therapies. This review underscores recent advancements in the utilization of QDs in imaging techniques, such as fluorescence tomography and magnetic resonance imaging, aiming at the early and precise detection of tumors. Emphasis is placed on the significance of QD design, synthesis and functionalization processes as well as their use in innovative strategies for targeted drug delivery, capitalizing on their ability to selectively deliver therapeutic agents to cancer cells. As the research in this field advances rapidly, this review covers a classification of QDs according to their composition, the characterization techniques than can be used to determine their properties and, subsequently, emphasizes recent findings in the field of TNBC‐targeting, highlighting the imperative need to address challenges, like potential toxicity or methodologies standardization. Collectively, the findings explored thus far suggest that QDs could pave the way for early diagnosis and effective therapy of TNBC, representing a significant stride toward precise and personalized strategies in treating TNBC.

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Synthesis of flexible magneto‐electric polyvinyl alcohol composites using hybrid filler particles of carbon quantum dots and cobalt nano for electromagnetic interference shielding application

Suresh,

Kandavalli,

Rajendiran

et al. 2024

Vinyl Additive Technology

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The main objective of the study is to synthesis and characterization of flexible magneto‐electric Polyvinyl Alcohol (PVA) composites for Electromagnetic Interference (EMI) shielding applications, by incorporating carbon quantum dots extracted from lychee fruit husks and cobalt nanoparticles sourced from Plectranthus amboinicus. Comprehensive mechanical, dielectrical, magnetic, and shielding tests were conducted to assess the performance of these novel materials. The mechanical characteristics of the composites were assessed to gauge their flexibility and robustness. In this regard, PV4 displayed a substantial tensile strength of 68 MPa, while PV6 exhibited an enhanced shore‐D hardness rating of 47. PV6 demonstrates superior dielectric properties, including a higher dielectric constant and a lower loss tangent, which are crucial for optimizing EMI shielding efficiency. When it comes to magnetic characteristics such as magnetization, retentivity, and coercivity, the PV6 composite designation outperforms the other composites. Additionally, PV6 exhibits higher electromagnetic interference (EMI) shielding effectiveness, measuring at approximately 49.8 dB in the E band and 56.5 dB in the F band. Findings demonstrate that the integration of carbon quantum dots and cobalt nanoparticles into the matrix resulted in flexible composites with enhanced mechanical strength. The incorporation of cobalt contributed to notable magnetic properties, increasing the materials' magnetization and retentivity. The tests on electromagnetic interference (EMI) showed that the shielding effectiveness got improved. The composite materials were able to reduce interference from electromagnetic waves in the tested frequency ranges. These flexible magneto‐electric PVA composites, developed using sustainable sources such as lychee fruit husks and Plectranthus amboinicus, exhibit promising potential for EMI shielding applications in diverse industries, including telecommunications, aerospace, and electronics, where reliable interference control is essential for optimal performance and safety.Highlights Cobalt nanoparticles sourced from Plectranthus amboinicus. Carbon quantum dots are prepared from lychee fruit husks via controlled pyrolysis. High tensile strength PVA composites prepared. Highest dielectric constant of 8.2 achieved for composite PV6. Higher wave shielding up to 56.5 dB achieved in “E” band.

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A review on plant derived carbon quantum dots for bio-imaging

Abstract: Carbon quantum dots (CQDs) have been emerged as a potent competent to classical metal-based semiconductor quantum owing to their fascinating characteristics such as high biocompatible nature, high solubility in water,...

Cited by 24 publications

References 117 publications

Review of Oxidative Dissolution and Sulfidation of Select Nanoparticles in the Environment: Impact on Applications

Review of Oxidative Dissolution and Sulfidation of Select Nanoparticles in the Environment: Impact on Applications

Emergence of Quantum Dots as Innovative Tools for Early Diagnosis and Advanced Treatment of Breast Cancer

Synthesis of flexible magneto‐electric polyvinyl alcohol composites using hybrid filler particles of carbon quantum dots and cobalt nano for electromagnetic interference shielding application

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