Monometallic and alloy nanoparticles: a review of biomedical applications

Koroleva, Elizaveta A; Shabalkin, Ilya D; Krivoshapkin, Pavel V.

doi:10.1039/d2tb02169b

Cited by 2 publications

(1 citation statement)

References 122 publications

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“…Metal nanoparticles (NPs) are size- and shape-dependent atom clusters (1–100 nm) that stand out for their large specific surface area to volume ratio [ 1 ]. In recent years, the use of NPs has gained importance due to their attractive properties, high efficiency, and low cost, which has led to the use of these materials in a broad range of applications, such as antibacterial, biomedical, pharmaceutical, cosmetic, electronics, and drug delivery systems [ 2 , 3 ]. In the synthesis of reduced-size NPs, nanotechnology plays an integral role.…”

Section: Introductionmentioning

confidence: 99%

Biopolymer-Based Composite Hydrogels Embedding Small Silver Nanoparticles for Advanced Antimicrobial Applications: Experimental and Theoretical Insights

2023

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In this work, we report a two-step methodology for the synthesis of small silver nanoparticles embedded into hydrogels based on chitosan (CS) and hydroxypropyl methylcellulose (HPMC) biopolymers. This method uses d-glucose as an external green reducing agent and purified water as a solvent, leading to an eco-friendly, cost-effective, and biocompatible process for the synthesis of silver nanocomposite hydrogels. Their characterization comprises ultraviolet-visible spectroscopy, Fourier-transform infrared spectra, differential scanning calorimetry, scanning electron microscopy with energy-dispersive spectroscopy, and transmission electron microscopy assays. Moreover, the structural stability of the hydrogels was investigated through sequential swelling–deswelling cycles. The nanomaterials showed good mechanical properties in terms of their structural stability and revealed prominent antibacterial properties due to the reduced-size particles that promote their use as new advanced antimicrobial agents, an advantage compared to conventional particles in aqueous suspension that lose stability and effectiveness. Finally, theoretical analyses provided insights into the possible interactions, charge transfer, and stabilization process of nanoclusters mediated by the high-electron-density groups belonging to CS and HPMC, revealing their unique structural properties in the preparation of nano-scaled materials.

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Section: Introductionmentioning

confidence: 99%

Biopolymer-Based Composite Hydrogels Embedding Small Silver Nanoparticles for Advanced Antimicrobial Applications: Experimental and Theoretical Insights

2023

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Tunable Iron–Cobalt Thin Films Grown by Electrodeposition

et al. 2023

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Iron–cobalt (FeCo) alloys are highly desirable for their exceptional and adjustable physicochemical properties, particularly in the form of thin films. This study focuses on the growth of iron–cobalt (FeCo) alloy thin films using potentiostatic electrodeposition. The effects of applied voltage and FeCo stoichiometry on the morphology, structure, and magnetic properties of the films are investigated. The results indicate that the electrodeposition potential does not affect the overall stoichiometry or the structural and magnetic properties. However, it does impact film thickness and grain sizes. Higher applied potentials lead to thicker films with faster growth rates, as well as smoother and more homogeneous films with smaller grains. Films with different Fe:Co ratios (Fe90Co10, Fe50Co50, and Fe10Co90) are obtained, and their compositions have a direct impact on morphology, with the amount of Fe influencing film thickness, growth rates, and grain sizes. Increasing Fe content (50, 90%) leads to thicker films and smaller grains. Films with low Fe content (10%) exhibit a face-centered cubic (fcc) structural phase instead of the typical body-centered cubic (bcc) structure. All FeCo alloys display soft magnetic properties with characteristic coercivities, and the low Fe (10%) sample with the fcc structure exhibits the highest coercivity among all the samples. The nucleation and growth mechanisms are investigated using electrodeposition curves and the Scharifker and Hills model. Increasing the applied potential leads to thicker films and higher growth rates, with the nucleation mechanism identified as instantaneous nucleation in the diffusion-controlled regime.

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Monometallic and alloy nanoparticles: a review of biomedical applications

Abstract: Currently, novel mono- and bimetallic NPs are providing a lot of attention for applications in biomedicine. Most significant areas of their potential implementation includes theranostics, drug delivery, biosensing and anti-infective applications.

Cited by 2 publications

References 122 publications

Biopolymer-Based Composite Hydrogels Embedding Small Silver Nanoparticles for Advanced Antimicrobial Applications: Experimental and Theoretical Insights

Biopolymer-Based Composite Hydrogels Embedding Small Silver Nanoparticles for Advanced Antimicrobial Applications: Experimental and Theoretical Insights

Tunable Iron–Cobalt Thin Films Grown by Electrodeposition

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