Rapid colorimetric sensing of gadolinium by EGCG-derived AgNPs: the development of a nanohybrid bioimaging probe

Singh, Rohit Kumar; Mishra, Sourav; Jena, Satyapriya; Panigrahi, Bijayananda; Das, Bhaskar; Jayabalan, R.; Parhi, Pankaj Kumar; Mandal, Dindyal

doi:10.1039/c8cc01777h

Cited by 25 publications

(12 citation statements)

References 26 publications

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“…The environmental and industrial applications of nanomaterials have been widely investigated for the detection and degradation of organic contaminants and dyes [1,2,3,4]. Nanoparticles (NPs) can offer more efficient dye degradation owing to their specific physicochemical characteristics such as high surface to volume ratio [5].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of iron-based nanoparticles using Chlorophytum comosum leaf extract: methyl orange dye degradation and antimicrobial properties

Ardakani

Alimardani

Tamaddon

et al. 2021

Heliyon

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Nowadays, green synthesis methods have gained growing attention in nanotechnology owning to their versatile features including high efficiency, cost-effectiveness, and eco-friendliness. Here, the aqueous extract of Chlorophytum comosum leaf was applied for the preparation of iron nanoparticles (INPs) to obtain spherical and amorphous INPs with a particle size below 100 nm as confirmed by TEM. The synthesized INPs managed to eliminate methyl orange (MO) from the aqueous solution. The concentration of MO can be easily checked via ultraviolet-visible (UV-Vis) spectroscopy throughout the usage of INPs at the presence of H 2 O 2 . The synthesized INPs exhibited MO degradation efficiency of 77% after 6 h. Furthermore, the synthesized INPs exhibited antibacterial activity against both Gram-negative and Gram-positive bacteria. The prepared INPs have an impressive effect on Staphylococcus aureus at concentrations below 6 μg/ml. Overall, the synthesized INPs could considerably contribute to our combat against organic dyes and bacteria.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of iron-based nanoparticles using Chlorophytum comosum leaf extract: methyl orange dye degradation and antimicrobial properties

Ardakani

Alimardani

Tamaddon

et al. 2021

Heliyon

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“…This gave a false impression that EGCg may have promoted the parasite's growth. These observations might be attributed to an unintentional sedimentation of EGCg, because it can react with Ag + and forms a brown aggregated nanoparticle sediment [23]. The PYG medium already contained traces of minerals and heavy metals, however, whether these minerals and metals contributed to the formation of EGCg precipitates remains to be investigated.…”

Section: Discussionmentioning

confidence: 99%

In Vitro Growth- and Encystation-Inhibitory Efficacies of Matcha Green Tea and Epigallocatechin Gallate Against Acanthameoba Castellanii

et al. 2020

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We examined the inhibitory effect of matcha green tea (Camellia sinensis) and epigallocatechin gallate (EGCg; the most abundant catechin in tea) on the vegetative growth and encystation of Acanthamoeba castellanii T4 genotype. The sulforhodamine B (SRB) stain-based colorimetric assay and hemocytometer counting were used to determine the reduction in A. castellanii trophozoite proliferation and encystation, in response to treatment with C. sinensis or EGCg. Fourier transform infrared (FTIR) microscopy was used to analyze chemical changes in the trophozoites and cysts due to C. sinensis treatment. Hot brewed and cold brewed matcha inhibited the growth of trophozoites by >40% at a 100 % concentration. EGCg at concentrations of 50 to 500 µM significantly inhibited the trophozoite growth compared to control. Hot brewed matcha (100% concentration) also showed an 87% reduction in the rate of encystation compared to untreated control. Although 500 µM of EGCg increased the rate of encystation by 36.3%, 1000 µM reduced it by 27.7%. Both percentages were not significant compared to control. C. sinensis induced more cytotoxicity to Madin Darby canine kidney cells compared to EGCg. FTIR chemical fingerprinting analysis showed that treatment with brewed matcha significantly increased the levels of glycogen and carbohydrate in trophozoites and cysts.

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“…In a few studies, the reducing property of catechin was used for green synthesis and functionalization of NPs. The catechins are used for the synthesis of metal NPs such as AuNPs and AgNPs, because they possess electron-rich hydroxyl groups that can reduce the metal ions and also stabilize the as-synthesized NPs. , Wu et al developed a non-aggregated catechin (Figure - 6a ) synthesized AuNPs-based probe (C-AuNPs) for sensitive and selective determination of Pb(II) in the H 2 O 2 -mediated oxidation of Amplex UltraRed (AUR). As a sensing mechanism, the fluorescence of the H 2 O 2 –AUR–C–AuNPs probes can be enhanced upon the addition of Pb(II), since it affects the catalytic activity of AuNPs for the H 2 O 2 -mediated oxidation of AUR .…”

Section: Optical (Bio)sensing Applications Of Phytochemicalsmentioning

confidence: 99%

“…A drastic decrease in UV–vis absorbance of P-AgNPs was observed upon addition of Gd(III), due to the special coordination between Gd(III) ions and carbonyl oxygen present on the surface of the NPs. In this work, motivated by the extraordinary fluorescence properties of AgNPs-Gd(III), their application as a bioimaging probe was also investigated in HCT116 cells (colon carcinoma) …”

Section: Optical (Bio)sensing Applications Of Phytochemicalsmentioning

confidence: 99%

“…Apart from the phytochemicals discussed in this section, there are also other phytochemicals in Table that due to their dual applications for both fluorescence sensing and bioimaging applications, the details of their fabrication and applications have already been discussed in the previous section (Optical (Bio)sensing Applications of Phytochemicals). ,,,,,,,,,,,,, …”

Section: Bioimaging Applications Of Phytochemicalsmentioning

confidence: 99%

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Phytochemicals toward Green (Bio)sensing

et al. 2020

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Because of numerous inherent and unique characteristics of phytochemicals as bioactive compounds derived from plants, they have been widely used as one of the most interesting nature-based compounds in a myriad of fields. Moreover, a wide variety of phytochemicals offer a plethora of fascinating optical and electrochemical features that pave the way toward their development as optical and electrochemical (bio)sensors for clinical/ health diagnostics, environmental monitoring, food quality control, and bioimaging. In the current review, we highlight how phytochemicals have been tailored and used for a wide variety of optical and electrochemical (bio)sensing and bioimaging applications, after classifying and introducing them according to their chemical structures. Finally, the current challenges and future directions/perspective on the optical and electrochemical (bio)sensing applications of phytochemicals are discussed with the goal of further expanding their potential applications in (bio)sensing technology. Regarding the advantageous features of phytochemicals as highly promising and potential biomaterials, we envisage that many of the existing chemical-based (bio)sensors will be replaced by phytochemical-based ones in the near future.

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Rapid colorimetric sensing of gadolinium by EGCG-derived AgNPs: the development of a nanohybrid bioimaging probe

Cited by 25 publications

References 26 publications

Green synthesis of iron-based nanoparticles using Chlorophytum comosum leaf extract: methyl orange dye degradation and antimicrobial properties

Green synthesis of iron-based nanoparticles using Chlorophytum comosum leaf extract: methyl orange dye degradation and antimicrobial properties

In Vitro Growth- and Encystation-Inhibitory Efficacies of Matcha Green Tea and Epigallocatechin Gallate Against Acanthameoba Castellanii

Phytochemicals toward Green (Bio)sensing

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