Seed-mediated synthesis of silver nanoparticles: Tunable surface Plasmon and their facile fabrication

Bhattacharjee, Rama Ranjan; Dasgupta, Uddipan

doi:10.1016/j.matpr.2020.09.167

Cited by 8 publications

(4 citation statements)

References 23 publications

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“…This slow change of color indicates the role of PVP as a capping agent. The formation of AgNPs was observed by the Localized Surface Plasmon Resonance (SPR) peak which can be influenced by the size, shape, aggregation, nature of the medium surrounding the nanoparticle and dielectric environment of the prepared nanoparticles [ 41 , 42 ]. Figure 1 A illustrated absorption spectra for colloidal nanosilver synthesized at different concentrations of PVP (5, 15 and 50 mg/mL).…”

Section: Resultsmentioning

confidence: 99%

Influence of Polyvinylpyrrolidone Concentration on Properties and Anti-Bacterial Activity of Green Synthesized Silver Nanoparticles

et al. 2022

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Environmentally green synthesis of stable polyvinyl pyrrolidone (PVP)-capped silver nanoparticles (PVP-AgNPs) was successfully carried out. The present study focused on investigating the influence of adding PVP during the synthesis process on the size, optical properties and antibacterial effect of silver nanoparticles produced. An aqueous extract of Eucalyptus camaldulensis leaves was used as a reducing agent. The effects of different PVP concentrations and reducing time on the synthesis of nanoparticles (NPs) were characterized by UV–Vis spectrophotometry, scanning electron microscopy (SEM), energy dispersive spectrum (EDX), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and nano tracker analysis (NTA). The addition of PVP was studied. The prepared PVP-AgNPs were spherical with an average size of 13 nm. FTIR analysis confirmed that PVP protects AgNPs by a coordination bond between silver nanoparticles and both N and O of PVP. DLS results indicated the good dispersion of silver nanoparticles. PVP-AgNPs were found to be stable for nearly 5 months. Antibacterial studies through the agar well diffusion method confirmed that silver nanoparticles synthesized using PVP had no inhibitor activity toward Gram-positive and Gram-negative bacteria as opposed to silver nanoparticles prepared without adding PVP, which showed a significant antibacterial activity towards some of the tested pathogens.

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Section: Resultsmentioning

confidence: 99%

Influence of Polyvinylpyrrolidone Concentration on Properties and Anti-Bacterial Activity of Green Synthesized Silver Nanoparticles

et al. 2022

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“…The structural entanglement of the interacting elements in the nano-composites uncovers the principle of redox state interactions and exchanges, which is assumed to be of π–π interactions between the organic C 60 molecule and the metallic AgNPs, respectively. It is further assumed that due to the presence and predominance of surface plasmonic electrons [ 30 ] over the metallic AgNPs, there is a tendency of the photonic quantization taking place in the interface interactions between the C60 and the metallic AgNPs, resulting in the formation of stable, quantized nano-composites, making it suitable for a myriad of biocidal, bioimaging, and opto-electrochemical applications [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Exploring the Bioactive Potentials of C60-AgNPs Nano-Composites against Malignancies and Microbial Infections

Biswas

Mishra

Rauta

et al. 2022

IJMS

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At present, the potential role of the AgNPs/endo-fullerene molecule metal nano-composite has been evaluated over the biosystems in-vitro. The intra-atomic configuration of the fullerene molecule (C60) has been studied in-vitro for the anti-proliferative activity of human breast adenocarcinoma (MDA-MB-231) cell lines and antimicrobial activity against a few human pathogens that have been augmented with the pristine surface plasmonic electrons and antibiotic activity of AgNPs. Furthermore, FTIR revealed the basic vibrational signatures at ~3300 cm−1, 1023 cm−1, 1400 cm−1 for O-H, C-O, and C-H groups, respectively, for the carbon and oxygen atoms of the C60 molecule. NMR studies exhibited the different footprints and magnetic moments at ~7.285 ppm, explaining the unique underlying electrochemical attributes of the fullerene molecule. Such unique electronic and physico-chemical properties of the caged carbon structure raise hope for applications into the drug delivery domain. The in-vitro dose-dependent application of C60 elicits a toxic response against both the breast adenocarcinoma cell lines and pathogenic microbes. That enables the use of AgNPs decorated C60 endo fullerene molecules to design an effective anti-cancerous drug delivery and antimicrobial agent in the future, bringing a revolutionary change in the perspective of a treatment regime.

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“…These authors demonstrated SERS sensing of chiral-achiral polymer blends by AuNPs and investigated the SERS and their chiroptical characteristics using surface plasmon resonance effects of gold nanoparticles [201]. Meanwhile, metal nanoparticle films can be fabricated by different methods, such as dip coating [205], and thermal evaporation [184,185]. Lim et al reported that silver nanoparticles were produced by sandwiching a thin silver film between two polyimide (PI) precursor layers and then curing PI /Ag /PI samples at 400 °C for 1 h under vacuum (Figure 11) [184].…”

Section: Synthesis Of Gold and Silver Nanoparticlesmentioning

confidence: 99%

Synthesis Methods and Optical Sensing Applications of Plasmonic Metal Nanoparticles Made from Rhodium, Platinum, Gold, or Silver

et al. 2023

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The purpose of this paper is to provide an in-depth review of plasmonic metal nanoparticles made from rhodium, platinum, gold, or silver. We describe fundamental concepts, synthesis methods, and optical sensing applications of these nanoparticles. Plasmonic metal nanoparticles have received a lot of interest due to various applications, such as optical sensors, single-molecule detection, single-cell detection, pathogen detection, environmental contaminant monitoring, cancer diagnostics, biomedicine, and food and health safety monitoring. They provide a promising platform for highly sensitive detection of various analytes. Due to strongly localized optical fields in the hot-spot region near metal nanoparticles, they have the potential for plasmon-enhanced optical sensing applications, including metal-enhanced fluorescence (MEF), surface-enhanced Raman scattering (SERS), and biomedical imaging. We explain the plasmonic enhancement through electromagnetic theory and confirm it with finite-difference time-domain numerical simulations. Moreover, we examine how the localized surface plasmon resonance effects of gold and silver nanoparticles have been utilized for the detection and biosensing of various analytes. Specifically, we discuss the syntheses and applications of rhodium and platinum nanoparticles for the UV plasmonics such as UV-MEF and UV-SERS. Finally, we provide an overview of chemical, physical, and green methods for synthesizing these nanoparticles. We hope that this paper will promote further interest in the optical sensing applications of plasmonic metal nanoparticles in the UV and visible ranges.

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Seed-mediated synthesis of silver nanoparticles: Tunable surface Plasmon and their facile fabrication

Cited by 8 publications

References 23 publications

Influence of Polyvinylpyrrolidone Concentration on Properties and Anti-Bacterial Activity of Green Synthesized Silver Nanoparticles

Influence of Polyvinylpyrrolidone Concentration on Properties and Anti-Bacterial Activity of Green Synthesized Silver Nanoparticles

Exploring the Bioactive Potentials of C60-AgNPs Nano-Composites against Malignancies and Microbial Infections

Synthesis Methods and Optical Sensing Applications of Plasmonic Metal Nanoparticles Made from Rhodium, Platinum, Gold, or Silver

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