Synthesis of gum acacia-silver nanoparticles based hydrogel composites and their comparative anti-bacterial activity

Virk, Karanpreet; Sharma, Kashma; Kapil, Shikha; Kumar, Vinod; Sharma, Vishal; Pandey, Sadanand; Kumar, Vijay

doi:10.1007/s10965-022-02978-8

Cited by 32 publications

(14 citation statements)

References 70 publications

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“…Moreover, these peptide-based LMWGs not only form interesting nanostructures but also form gel under suitable physico-chemical conditions. Hydrogels are known for their diverse applications in the fields of nanohybrid materials, − templated synthesis of nanoparticles (NPs), , environmental remediation, − catalysis, delivery of biologics, − regenerative medicine, cell culture, and novel antibiotics. − These gelators utilize several non-covalent interactions to self-assemble into bigger supramolecular structures. Using metal ions is an elegant pathway to create non-covalent cross-linking between the peptide gelators to induce gel formation. , Histidine, aspartic acid, glutamic acid, cysteine, and methionine are known to act as ligands utilizing their functional side chains.…”

Section: Introductionmentioning

confidence: 99%

Metallogels from Silver Nanoparticles and Peptide Nanofibers as Antimicrobial Surfaces

Bairagi

Ghosh

Roy

et al. 2023

ACS Appl. Nano Mater.

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Peptide amphiphiles (PAs) are elusive candidates to construct soft materials possessing various functionalities, including potent antimicrobial activity. It is imperative to look for a broadspectrum antibiotic against which the genesis of drug resistance is difficult. Herein, a histidine-based PA is found to form a transparent metallohydrogel when AgNO 3 is added to a hot solution of the PA in 2:1 (PA/AgNO 3 ) molar ratio. Exposure to 365 nm UV lamp results in blue light-emitting silver nanocluster (NC) formation inside the hydrogel matrix. Interestingly, when the metallohydrogel is turned in solution through sheer thinning and rested for 12−14 h in ambient light, the gel reforms along with the formation of non-fluorescent silver nanoparticles (NPs). Thus, two different nanomaterials can be synthesized separately inside the gel matrix with modulation of the conditions. As the NC and NP formation takes place, ordered growth of these nanomaterials can be observed along the nanofibrous hydrogel network. Rheological measurements show enhancement of storage modulus in NC-and NP-containing hybrid hydrogels. This new nanohybrid system comprising peptide gel-based nanofibers and silver NC/NPs has potential applications against Gram-positive and Gram-negative bacteria. Furthermore, the plausible mechanism of the antimicrobial effects has been thoroughly investigated. The elevated levels of reactive oxygen species (ROS) found in the bacteria in the presence of the hybrid hydrogels establish that intra-cellular ROS generated in the cytosol of the bacteria is responsible for the death of bacteria. The current work indicates the hybrid hydrogel's utility as a potent antimicrobial agent.

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Section: Introductionmentioning

confidence: 99%

Metallogels from Silver Nanoparticles and Peptide Nanofibers as Antimicrobial Surfaces

Bairagi

Ghosh

Roy

et al. 2023

ACS Appl. Nano Mater.

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“…In contrast, the Ag@KS sponge showed a prominent zone of inhibition of diameter 11.2 mm ± 0.2 mm and 11.0 mm ± 0.2 mm, respectively, for Escherichia coli and Staphylococcus aureus , indicating excellent antibacterial activity ( Figure 8 b,d). AgNPs with a size of less than 10 nm have the ability to penetrate bacterial cell walls and subsequently change the structure and cause cell damage [ 43 ]. Overall, our findings indicate that AgNPs decorated on this sustainable sponge have a distinct inhibitory effect on the microbial growth of Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative), thus widening their applications in the environmental field [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

Gum Hydrocolloids Reinforced Silver Nanoparticle Sponge for Catalytic Degradation of Water Pollutants

et al. 2022

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The accumulation of organic contaminants including dyes in aquatic systems is of significant environmental concern, necessitating the development of affordable and sustainable materials for the treatment/elimination of these hazardous pollutants. Here, a green synthesis strategy has been used to develop a self-assembled gum kondagogu-sodium alginate bioconjugate sponge adorned with silver nanoparticles, for the first time. The properties of the nanocomposite sponge were then analyzed using FTIR, TGA, SEM, and MicroCT. The ensued biobased sponge exhibited hierarchical microstructure, open cellular pores, good shape memory, and mechanical properties. It merges the attributes of an open cellular porous structure with metal nanoparticles and are envisaged to be deployed as a sustainable catalytic system for reducing contaminants in the aqueous environment. This nanocomposite sponge showed enhanced catalytic effectiveness (km values up to 37 min−1 g−1 and 44 min−1 g−1 for methylene blue and 4-nitrophenol, respectively), antibacterial properties, reusability, and biodegradability (65% biodegradation in 28 days).

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“…In order to obtain the optimum process parameters for synthesizing AgNPs, a one factor-at-a-time technique was deployed. In this technique, variable concentrations of silver ion (0.5, 1, 2, and 3 mM), concentrations of gardenia yellow (6,12,18,24, and 30 ml), reaction time (30,40,50…”

Section: Green Synthesis Of Agnpsmentioning

confidence: 99%

“…Nanomaterials are increasingly being used in a variety of applications due to their interesting functional properties. Among them, space/aviation, optics, chemical industry, solar hydrogen, batteries, fuel cell, sensors, 2 aeronautic industry, power generation, building/construction industry, consumer electronics, automotive engineering, thermoelectric devices, cosmetic industry and pharmaceuticals 3,4 are mostly remarkable 5,6 …”

Section: Introductionmentioning

confidence: 99%

Fabrication and stabilization of green nanosilver using gardenia yellow natural dyes for efficient degradation of bacteria

Jiang

Guo

Zhang

et al. 2022

Env Prog and Sustain Energy

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The various applications of silver nanoparticles (AgNPs) are brutally hampered in the practical field due to their instability and aggregation features. Thus, highly stable colloidal AgNPs were produced in obedience to the principle of 'green chemistry' that uses natural dyes extracted from gardenia fruits as stabilizing and simultaneously as reducing agents. The effect of operating conditions on the synthesis of AgNPs was studied using a one-variable-at-a-time technique to maximize the growth of particles.The analysis of AgNPs produced at optimum reaction parameters discovered that the particles are face-centered cubic metallic silver, mostly in spherical shapes, nanoranged in diameter (23.4 ± 6.4 nm) with a confined size distribution, enormously crystalline surface (d-spacing = 0.233 nm), firmly stabilized (zeta potential = À29.0 mV) by a thin membrane of gardenia phytochemicals. They exhibited significant bacterial reduction inhibition against the growth of Escherichia coli and Staphylococcus aureus owing to the strong antibacterial function of nanosilver.

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Synthesis of gum acacia-silver nanoparticles based hydrogel composites and their comparative anti-bacterial activity

Cited by 32 publications

References 70 publications

Metallogels from Silver Nanoparticles and Peptide Nanofibers as Antimicrobial Surfaces

Metallogels from Silver Nanoparticles and Peptide Nanofibers as Antimicrobial Surfaces

Gum Hydrocolloids Reinforced Silver Nanoparticle Sponge for Catalytic Degradation of Water Pollutants

Fabrication and stabilization of green nanosilver using gardenia yellow natural dyes for efficient degradation of bacteria

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