Size and charge effects of metal nanoclusters on antibacterial mechanisms

Journal of Nanobiotechnology, Journal Year: 2023, Volume and Issue: 21(1)

Published: Nov. 15, 2023

Abstract Nanomaterials, specifically metal nanoclusters (NCs), are gaining attention as a promising class of antibacterial agents. Metal NCs exhibit properties due to their ultrasmall size, extensive surface area, and well-controlled ligands. The mechanisms influenced by two primary factors: size charge. In this review, we summarize the impacts charge on mechanisms, interactions with bacteria, factors that influence effects against both gram-negative gram-positive bacteria. Additionally, highlight occur when negatively or positively charged, provide examples applications A better understanding relationships between activity will aid in design synthesis nanomaterials for development effective agents bacterial infections. Based remarkable achievements NCs, review also presents conclusions current challenges future perspectives fundamental investigations practical applications. Graphical

Language: Английский

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Planar Core and Macrocyclic Shell Stabilized Atomically Precise Copper Nanocluster Catalyst for Efficient Hydroboration of C–C Multiple Bond

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(23), P. 16295 - 16305

Published: May 30, 2024

Atomically precise metal nanoclusters (NCs) have become an important class of catalysts due to their catalytic activity, high surface area, and tailored active sites. However, the design development bond-forming reaction based on copper NCs are still in early stages. Herein, we report synthesis atomically nanocluster with a planar core unique shell, [Cu45(TBBT)29(TPP)4(C4H11N)2H14]2+ (Cu45) (TBBT: 4-tert-butylbenzenethiol; TPP: triphenylphosphine), yield via one-pot reduction method. The resulting structurally well-defined Cu45 is highly efficient catalyst for hydroboration alkynes alkenes. Mechanistic studies show that single-electron oxidation situ-formed ate complex enables formation boryl-centered radicals under mild conditions. This work demonstrates promise as C–B heteroatom reactions. compatible wide range alkenes functional groups producing hydroborated products.

Language: Английский

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Marine‐Derived Nanozyme‐Crosslinked Self‐Adaptive Hydrogels for Programmed Regulating the Regeneration Process

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 16, 2024

Abstract Self‐adaptive hydrogels that can specifically respond to pathological cues and match the highly ordered tissue regeneration process are significantly on‐demand for effective wound management. Herein, multifunctional marine‐derived gold clusterzyme (AuNCs)‐based self‐adaptive with microenvironment triggered release behavior elaborately fabricated antioxidant, anti‐inflammatory immunoregulation. The marine mussel‐derived catechol ligands (L‐3,4‐dihydroxyphenylalanine) endow AuNCs enhanced superoxide dismutase‐mimic activity due their high affinity anion free radical (O 2 − •) unique electron transfer mechanism, leading 100% inhibition of O •. Upon uniformly crosslinking phenylboronic acid‐modified sodium alginate (PBA‐Sa), obtained AuNCs@PBA‐Sa exhibit outstanding self‐healing property, tunable degradation good removability. Meanwhile, greatly enhance mechanical property confer hydrogel favorable adhesion rapid hemostasis. Furthermore, injectable not only adapt shape irregular wound, but also smartly microstructure physiological diabetic responsive upon break boronate ester bonds. released clusterzymes actively induce generation M2‐macrophage, demonstrating an pro‐regeneration effect. Therefore, present clusterzyme‐based hold great potential remolding dynamic smart

Language: Английский

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Molecular Interactions in Atomically Precise Metal Nanoclusters

Precision Chemistry, Journal Year: 2024, Volume and Issue: 2(10), P. 495 - 517

Published: Aug. 23, 2024

For nanochemistry, precise manipulation of nanoscale structures and the accompanying chemical properties at atomic precision is one greatest challenges today. The scientific community strives to develop design customized nanomaterials, while molecular interactions often serve as key tools or probes for this atomically undertaking. In Perspective, metal nanoclusters, especially gold a good platform understanding such interactions. These nanoclusters have core size about 2 nm, defined number atoms, protecting ligands with known crystal structure. structure allows us discuss how facilitate systematic modification functionalization from their inner core, through ligand shell, external assembly. Interestingly, packing nanocluster can be affected by forces on surface. After discussing structure, we examine various atomic-level strategies enhance photoluminescent quantum yield improve nanoclusters' catalytic performance. Beyond single cluster level, attractive repulsive been employed engineer self-assembly behavior thus morphology nanoclusters. methodological fundamental insights systemized in review should useful customizing assembly patterns level.

Language: Английский

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A comprehensive review of atomically precise metal nanoclusters with emergent photophysical properties towards diverse applications

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 13, 2024

Ligand-protected metal nanoclusters are an emerging class of nanomaterials at the interface atomic and plasmonic regimes with unique photophysical electrochemical properties, leading to diverse applications.

Language: Английский

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Ultrasonic Activation of Au Nanoclusters/TiO2: Tuning Hydroxyl Radical Production Through Frequency and Nanocluster Size

Molecules, Journal Year: 2025, Volume and Issue: 30(3), P. 541 - 541

Published: Jan. 24, 2025

This study explores the sonocatalytic activity of gold nanoclusters (Au NCs) combined with titanium dioxide (TiO2) nanoparticles, forming Au NCs/TiO2 composites. The hybrid material significantly enhances hydroxyl radical (•OH) generation under ultrasonic conditions, attributed to high-energy cavitation bubbles formed during ultrasonication. effects frequency (200, 430, and 950 kHz) power were systematically evaluated on Au144/TiO2 composites, identifying 430 kHz as optimal for •OH production due its efficient energy. Au144 NCs function electron traps, reducing electron–hole recombination in ultrasonically activated TiO2, thereby improving charge separation enhancing generation. Size-dependent also studied, showing an efficiency trend > Au25 plasmonic nanoparticles bare TiO2. These findings highlight importance ultrasonication NC size optimizing performance providing valuable insights designing advanced sonocatalysts applications chemical synthesis, environmental remediation, biomedical fields.

Language: Английский

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Furfural-bridged silsesquioxane-based hybrid network rich in heteroatoms for selective adsorption and reduction of Au(III) in the aqueous phase

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159826 - 159826

Published: Jan. 1, 2025

Language: Английский

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Size transformation of Au nanoclusters for enhanced photocatalytic hydrogen generation: Interaction behavior at nanocluster/semiconductor interface

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 651, P. 368 - 375

Published: Aug. 2, 2023

Language: Английский

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Recent Progress on Ligand-Protected Metal Nanoclusters in Photocatalysis

Nanomaterials, Journal Year: 2023, Volume and Issue: 13(12), P. 1874 - 1874

Published: June 16, 2023

The reckless use of non-replenishable fuels by the growing population for energy and resultant incessant emissions hazardous gases waste products into atmosphere have insisted that scientists fabricate materials capable managing these global threats at once. In recent studies, photocatalysis has been employed to focus on utilizing renewable solar initiate chemical processes with aid semiconductors highly selective catalysts. A wide range nanoparticles showcased promising photocatalytic properties. Metal nanoclusters (MNCs) sizes below 2 nm, stabilized ligands, show discrete levels exhibit unique optoelectronic properties, which are vital photocatalysis. this review, we intend compile information synthesis, true nature, stability MNCs decorated ligands varying efficiency metal NCs concerning changes in aforementioned domains. review discusses activity atomically precise ligand-protected their hybrids domain conversion such as photodegradation dyes, oxygen evolution reaction (ORR), hydrogen (HER), CO2 reduction (CO2RR).

Language: Английский

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Enhanced Photocatalytic Degradation of Methyl Orange Using Nitrogen‐Functionalized MesoporousTiO₂ Decorated with Au₉ Nanoclusters

Solar RRL, Journal Year: 2024, Volume and Issue: 8(7)

Published: Feb. 1, 2024

A novel catalyst for dye degradation is fabricated through attaching Au 9 nanoclusters (Au NCs) to N functionalized mesoporous TiO 2 (NMTiO ). The NMTiO created chitosan‐assisted soft templating resulting in an terminated surface preventing the agglomeration of NCs adsorbed and enhancing overall loading with . calcination atmosphere influenced properties its capability adsorb NCs. photocatalytic effectiveness these materials was probed methyl orange (MO) degradation. black coloured /NMTiO highly effective completely degrade MO dyes within 20 min due large reaction constant (0.176 −1 Parameter interactions process were explored using response methodology (RSM) dependency on affecting parameters evaluated based statistical analysis 3D plots.

Language: Английский

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