Presence of fluoride in water diminishes fast the SPR peak of silver nanocrystals showing large red shift with quick sedimentation – A fast sensing and fast removal case

Debnath, Babli; Das, Ratan

doi:10.1016/j.saa.2020.119306

Cited by 9 publications

(5 citation statements)

References 52 publications

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“…This effect might be further improved by using other formulations without any additives; of note, TP-1 used in this formulation is a fluoride-based TP and AgNPs are known to be highly reactive and capable of interacting with media components. In this case, it is possible that fluoride can interact with the AgNPs [ 61 ]. Nonetheless, the known or common practice of maintaining good oral hygiene is the use of dentifrices for two minutes and rinsing it off [ 62 ].…”

Section: Resultsmentioning

confidence: 99%

Prospects of Using Gum Arabic Silver Nanoparticles in Toothpaste to Prevent Dental Caries

et al. 2023

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There is growing interest in the use of green synthesized silver nanoparticles (AgNPs) to control and prevent dental diseases. The incorporation of green synthesized AgNPs into dentifrices to reduce pathogenic oral microbes is motivated by their presumed biocompatibility and broad-spectrum antimicrobial activity. In the present study, gum arabic AgNPs (GA-AgNPs) were formulated into a toothpaste (TP) using a commercial TP at a non-active concentration, to produce GA-AgNPs_TP. The TP was selected after evaluating the antimicrobial activity of four commercial TPs 1-4 on selected oral microbes using agar disc diffusion and microdilution assays. The less active TP-1 was then used in the formulation of GA-AgNPs_TP-1; thereafter, the antimicrobial activity of GA-AgNPs_0.4g was compared to GA-AgNPs_TP-1. The cytotoxicity of GA-AgNPs_0.4g and GA-AgNPs_TP-1 was also assessed on the buccal mucosa fibroblast (BMF) cells using the MTT assay. The study demonstrated that antimicrobial activity of GA-AgNPs_0.4g was retained after being combined with a sub-lethal or inactive concentration of TP-1. The non-selective antimicrobial activity and cytotoxicity of both GA-AgNPs_0.4g and GA-AgNPs_TP-1 was demonstrated to be time and concentration dependent. These activities were instant, reducing microbial and BMF cell growth in less than one hour of exposure. However, the use of dentifrice commonly takes 2 min and rinsed off thereafter, which could prevent damage to the oral mucosa. Although, GA-AgNPs_TP-1 has a good prospect as a TP or oral healthcare product, more studies are required to further improve the biocompatibility of this formulation.

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Section: Resultsmentioning

confidence: 99%

Prospects of Using Gum Arabic Silver Nanoparticles in Toothpaste to Prevent Dental Caries

et al. 2023

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“…This situation consistent with the effect caused by local morphological changes in Au films with nanostructures. 36,37 In Figure 3b, the sensitivities of each FO-SPR sensor were evaluated in dilutions of glycerin at various refractive indices (1.33−1.38). Intensity-based SPR sensing is more sensitive than the wavelength-based method when limited to small refractive index changes such as biomolecular adsorptions.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Fiber Optic Plasmonic Sensors Based on Nanodome Arrays with Nanogaps

et al. 2022

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In this study, a high-performance fiber optic surface plasmon resonance (FO-SPR) sensor using a dome array with nanogaps (DANG) is proposed for label-free real-time detection of biomolecules. A novel and simple method using polymer beads enables high sensitivity by allowing hotspots with nanometer spacing between the Au dome and the surrounding film. The nanodome structure, which comprises a polymer core and a Au shell, induces a localized surface plasmon, expands the sensing area, and extensively enhances the electromagnetic field. The refractive index sensitivity of the FO-SPR sensor with nanostructures, i.e., with nanogaps and nanodomes, was found to be 7.8 times higher than that of the FO-SPR sensor without nanostructures. The proposed sensor achieved a low detection limit of 38 fg/mL while quantifying thyroglobulin antibody–antigen interactions and exhibited excellent selectivity. In addition, it helped detect serum samples with a 103% recovery rate.

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“…The formation of a reddish-brown color confirmed the synthesis of AgNPs. This gradual color change by a reduction process was evaluated and recorded using a UV-Visible spectrophotometer between 300 and 700 nm [82].…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Macrofungal Mediated Biosynthesis of Silver Nanoparticles and Evaluation of Its Antibacterial and Wound-Healing Efficacy

Vijayakumar,

Kim,

et al. 2024

IJMS

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Recently, the utilization of biological agents in the green synthesis of nanoparticles has been given interest. In this study, silver nanoparticles were synthesized from an aqueous extract of macrofungus (mushroom), namely Phellinus adamantinus, in a dark room using 20 µL of silver nitrate. Biosynthesized silver nanoparticles were confirmed by analyzing them using a UV-Vis (ultraviolet-visible) spectrophotometer. The synthesized silver nanoparticles were optimized at different pH and temperatures with various dosages of AgNO3 (silver nitrate) and fungal extracts. The synthesized AgNPs (silver nanoparticles) were characterized using TEM (transmission electron microscopy) and EDX (energy-dispersive X-ray) analyses, which confirmed the presence of silver nanoparticles. The size of the nanosilver particles was found to be 50 nm with higher stability. The mycosynthesized AgNPs showed effective antibacterial activity against strains of Gram-positive (Staphylococcus aureus and Bacillus subtilis) and Gram-negative (E. coli and Pseudomonas aeruginosa) bacteria. The minimum inhibitory concentration (MIC) was found to be 3.125 μg/mL by MIC assay. The MTT assay (3-[4,5-dimethylthiazol-2-yl] 2,5-diphenyl-2H-tetrazolium bromide) was performed to study cytotoxicity, and reduced cell viability was recorded at 100 μg/mL. Silver-Polygalacturonic acid-Polyvinyl alcohol ((Ag-PGA)-PVA) nanofiber was prepared using the electrospinning method. The in vitro wound scratch assay was demonstrated to study the wound-healing efficacy of the prepared nanofiber. The wound-healing efficacy of the AgNP-incorporated nanofiber was found to be 20% after 24 h. This study will lay a platform to establish a unique route to the development of a novel nanobiomaterial and its application in antibacterial and wound-healing therapy.

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Presence of fluoride in water diminishes fast the SPR peak of silver nanocrystals showing large red shift with quick sedimentation – A fast sensing and fast removal case

Cited by 9 publications

References 52 publications

Prospects of Using Gum Arabic Silver Nanoparticles in Toothpaste to Prevent Dental Caries

Prospects of Using Gum Arabic Silver Nanoparticles in Toothpaste to Prevent Dental Caries

Fiber Optic Plasmonic Sensors Based on Nanodome Arrays with Nanogaps

Macrofungal Mediated Biosynthesis of Silver Nanoparticles and Evaluation of Its Antibacterial and Wound-Healing Efficacy

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