Seed mediated growth of silver nanoplates on glass: exploiting the bimodal antibacterial effect by near IR photo-thermal action and Ag<sup>+</sup>release

D’Agostino, Agnese; Taglietti, Angelo; Grisoli, Pietro; Dacarro, Giacomo; Cucca, Lucia; Patrini, M.; Pallavicini, Piersandro

doi:10.1039/c6ra11608f

Cited by 54 publications

(60 citation statements)

References 35 publications

(74 reference statements)

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“…More recently, we coupled intrinsic (chemical) and switchable photothermal antibacterial action by preparing surfaces bearing monolayers of non‐spherical Ag nanoparticles, with intense absorptions in the NIR range . Ag nanoplates (AgNPLT) were grown on glass slides bearing a PEI‐silane layer by means of a seed‐growth procedure, first forming an already described monolayer of citrate‐coated AgNP as seeds, then dipping these surfaces in a Ag + /citrate/ascorbic acid solution.…”

Section: Switchable Antibacterial Surfacesmentioning

confidence: 99%

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Self‐Assembled Monolayers of Silver Nanoparticles: From Intrinsic to Switchable Inorganic Antibacterial Surfaces

2018

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The layer‐by‐layer technique allows to graft molecular monolayers on bulk surfaces that, in turn, allow to graft monolayers of metal nanoparticles. This microreview focuses on the preparation of such materials featuring a monolayer of silver nanoparticles (AgNP) and their use as antimicrobial surfaces against both planktonic bacteria and biofilms. The role of Ag+ release and of direct cell/AgNP contact in the antibacterial action will be stressed as a function of the adhesive molecular layer, of the AgNP dimension and shape, of their surface density, and of the molecular overcoating. While these surfaces display an intrinsic antibacterial action, a further evolution will also be reviewed, in which additional photothermal antibacterial action can be switched on demand, using near‐IR radiation and non‐spherical AgNP or a combination of AgNP with non‐spherical AuNP. The intrinsic and switchable photothermal action of these surfaces will be unraveled, and their synergistic effect stressed.

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Section: Switchable Antibacterial Surfacesmentioning

confidence: 99%

Section: Switchable Antibacterial Surfacesmentioning

confidence: 99%

Self‐Assembled Monolayers of Silver Nanoparticles: From Intrinsic to Switchable Inorganic Antibacterial Surfaces

2018

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“…There have been promising findings on the in vitro antibacterial impact of stimuli‐responsive antibacterial NPs 110,146. In the field of antimicrobials, the integration of stimuli‐responsive nanomaterials into antibacterial medical products is still at a preclinical or academic research level 147–150. Some examples of wound dressings, catheters, bone cement, and cardiovascular implants containing nanosilver or silver‐loaded nanocomposites as antimicrobial agent is already available, and mainly nanosilver out of all nanomaterials is in clinical use 151–153…”

Section: Nanomaterial‐integrated Diagnosis Prevention and Therapy Omentioning

confidence: 99%

Evolving Technologies and Strategies for Combating Antibacterial Resistance in the Advent of the Postantibiotic Era

Karaman

Ercan

Bakay

et al. 2020

Adv Funct Materials

123

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The threats posed by the impending "postantibiotic era" have put forward urgent challenges to be overcome by providing new diagnostic and therapeutic regimes for improved diagnosis and treatment of bacterial infections. Antibiotic resistance and incurable bacterial infections are especially important in a society faced with rapid demographic changes. With very few new antibiotics in the drug development pipeline, not being able to match the pace of antimicrobial resistance evolution, developments within other fields such as materials sciences and medical technologies are required to realize innovative antibacterial approaches. This progress report presents recent advances in especially nanotechnology-based approaches and their concomitant use with complementary antibacterial treatments. Synergistically improved antibacterial activity can be reached by considering novel, promising approaches such as photodynamic and photothermal therapy as well as cold atmospheric pressure treatments as complementary strategies to fight against antibacterial resistance. Moreover, this report describes how these novel technologies can be further improved especially by integration of nanomaterials into the currently applied single modal strategies against bacterial infections.

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“…This glass material coated silver nanoplates can exert an antibacterial action based on the photo-thermal effect through laser-induced hyperthermia, which can be switched on by 808 nm laser excitation in 20 min. The laser-induced hyperthermia almost completely eliminated bacteria S. aureus and E. coli [50]. Moreover, bulk glass surfaces coated with polymer with synthesized citrate silver nanoplates have ability to strongly absorb laser radiation in the near infrared (NIR) range and this coating exerts an antibacterial activity against S. aureus and E. coli [51].…”

Section: Polymer Stabilized Nanomaterialsmentioning

confidence: 99%

“…Moreover, bulk glass surfaces coated with polymer with synthesized citrate silver nanoplates have ability to strongly absorb laser radiation in the near infrared (NIR) range and this coating exerts an antibacterial activity against S. aureus and E. coli [51]. The mechanism of action of these composites are still under debate but they rely on release of silver ions from nano-objects and the subsequent interaction of Ag with bacteria and the antibacterial action caused by photothermal effect [50,51].…”

Section: Polymer Stabilized Nanomaterialsmentioning

confidence: 99%

The Use of Nanomedicine for Targeted Therapy against Bacterial Infections

et al. 2019

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The emergence of drug resistance combined with limited success in the discovery of newer and effective antimicrobial chemotherapeutics poses a significant challenge to human and animal health. Nanoparticles may be an approach for effective drug development and delivery against infections caused by multi-drug resistant bacteria. Here we discuss nanoparticles therapeutics and nano-drug delivery against bacterial infections. The therapeutic efficacy of numerous kinds of nanoparticles including nanoantibiotics conjugates, small molecules capped nanoparticles, polymers stabilized nanoparticles, and biomolecules functionalized nanoparticles has been discussed. Moreover, nanoparticles-based drug delivery systems against bacterial infections have been described. Furthermore, the fundamental limitation of biocompatibility and biosafety of nanoparticles is also conferred. Finally, we propose potential future strategies of nanomaterials as antibacterials.physical strength, electrical conductance, chemical reactivity and optical effects [11]. These criteria help in increasing the surface area, enhancing release of drug, reducing the dose required, and improving solubility and bioavailability of the compounds [12]. Moreover, these properties are also important for the diagnosis of microbial diseases with high sensitivity and selectivity and those with fluorescent properties or labeled with fluorescent dyes have also been employed for bacterial detection and susceptibility. In addition, inorganic nanoparticle-based diagnostic approaches depend upon the identification of known bacterial genome sequences by directing probes, and thus may not recognize altered and/or novel bacterial strains [13]. Furthermore, nanoparticles based specific drug targeting improve the therapeutic index, increase stability of drug, and decrease drug resistance. For example, silver nanoparticles affect Escherichia coli by forming complex with electron donor groups on amino acids and nucleic acids [12]. At present, liposomal drugs and polymer-drug conjugates have been approved for infectious diseases treatment, and many other antimicrobial nanoparticle formulations are under preclinical test [14].Gold nanoparticles have gained significant attention recently due to their tunable antimicrobial applications. Gold has been the subject of interest against bacterial infections for its biocompatibility and ease in conjugation with drugs and biomolecules. Gold conjugated with various drugs have shown to enhance their efficacy against bacteria. Gold nanoparticles coated with aminoglycosides have been found to be efficient antibacterial agents against various bacteria such as Staphylococcus aureus, Micrococcus luteus, E. coli and Pseudomonas aeruginosa [15]. In another study, after assessment of the surface chemistry of nanoparticles, the synergistic mechanism showed that hydrophobic cationic conjugated gold nanoparticles reduced the minimum inhibitory concentration (MIC) of fluoroquinolone against multidrug resistant by 8-16 times [16]. More recently, formulatio...

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Seed mediated growth of silver nanoplates on glass: exploiting the bimodal antibacterial effect by near IR photo-thermal action and Ag⁺release

Abstract: Silver nanoplates synthesized with the desired features directly on glass show a bimodal antibacterial action: Ag+ release and NIR laser switchable hyperthermia.

Cited by 54 publications

References 35 publications

Self‐Assembled Monolayers of Silver Nanoparticles: From Intrinsic to Switchable Inorganic Antibacterial Surfaces

Self‐Assembled Monolayers of Silver Nanoparticles: From Intrinsic to Switchable Inorganic Antibacterial Surfaces

Evolving Technologies and Strategies for Combating Antibacterial Resistance in the Advent of the Postantibiotic Era

The Use of Nanomedicine for Targeted Therapy against Bacterial Infections

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Seed mediated growth of silver nanoplates on glass: exploiting the bimodal antibacterial effect by near IR photo-thermal action and Ag+release

Abstract: Silver nanoplates synthesized with the desired features directly on glass show a bimodal antibacterial action: Ag+ release and NIR laser switchable hyperthermia.

Cited by 54 publications

References 35 publications

Self‐Assembled Monolayers of Silver Nanoparticles: From Intrinsic to Switchable Inorganic Antibacterial Surfaces

Self‐Assembled Monolayers of Silver Nanoparticles: From Intrinsic to Switchable Inorganic Antibacterial Surfaces

Evolving Technologies and Strategies for Combating Antibacterial Resistance in the Advent of the Postantibiotic Era

The Use of Nanomedicine for Targeted Therapy against Bacterial Infections

Contact Info

Product

Resources

About

Seed mediated growth of silver nanoplates on glass: exploiting the bimodal antibacterial effect by near IR photo-thermal action and Ag⁺release