Manufacturing ordered films of nanoparticles by Langmuir–Blodgett technique

Alejo, Teresa; Martín‐García, Beatriz; Moreno, María Dolores Merchán; Sánchez-Hidalgo, R.; Velázquez, M. Mercedes

doi:10.1016/b978-0-444-63240-1.00005-x

Cited by 3 publications

(1 citation statement)

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“…These results are in agreement with previously published results in which a frequency analysis of the images was performed, showing single-mode distribution peaks with maximum frequencies centered at 10 nm in diameter [65]. For the rest of the materials, the TEM images show large and aggregated carbon nanoparticles formed during solvent evaporation and due to the hydrodynamic processes [69,70] (Figure 1b-d). To avoid this aggregation, we used Nanoparticle Tracking Analysis, NTA to obtain the diameter of the free nanoparticles [65].…”

Section: Resultssupporting

confidence: 92%

N-Doped Carbon Nanoparticles as Antibacterial Agents on Escherichia coli: The Role of the Size and Chemical Composition of Nanoparticles

2023

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In the last years N-doped carbon nanoparticles have been shown to have improved antibacterial activity over the undoped nanomaterial, but it is difficult to find correlations between the structure of the nanoparticle and its antibacterial activity. This prevents us from proposing a clear antibacterial mechanism and makes it difficult to select materials with the best physical and chemical properties for use as antibacterial agents. With this purpose, here, we analyze the effect of, the size and the surface chemical composition of four N-doped carbon nanoparticles on the growth of Escherichia coli bacteria, used in this work as a model of Gram-negative bacteria. Our results indicated great antibacterial activity as the concentration of the carbon nanoparticles increased. The IC50 values obtained ranged between 23 and 34 μg/mL, the lowest values found in the literature for CNPs in the absence of metals. The reduction rate was analyzed using a Ligand-Substrate model based on Monod’s equation, which allows us to interpret the dependence of the nanoparticle-bacteria affinity with the nanomaterial structure. The results of the model indicate the contribution of two mechanisms, oxidative stress and the nanoknife in the antibacterial process on Escherichia coli bacteria.

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Section: Resultssupporting

confidence: 92%

N-Doped Carbon Nanoparticles as Antibacterial Agents on Escherichia coli: The Role of the Size and Chemical Composition of Nanoparticles

2023

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Assembly, Properties, and Application of Ordered Group II–VI and IV–VI Colloidal Semiconductor Nanoparticle Films

Micheel

Baruah

Kumar

et al. 2022

Adv Materials Inter

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N-Doped Carbon Nanoparticles As Antibacterial Agents: The Role of the Chemical Composition on the Antibacterial Activity

Moreno¹,

Pérez²,

Velázquez³

2023

Preprint

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Graphene-based nanomaterials have emerged as promising materials for a wide range of applications.. Therefore, in the last years carbon nanoparticles have attracted great attention due to their low toxicity, high biocompatibility and easy preparation. Recently, N-doped carbon nanoparticles have been shown to have improved antibacterial activity over the undoped nanomaterial, but it is difficult to find correlations between the structure of the nanoparticle and its antibacterial activity. With this purpose, here, we analyze the effect of both, the nanoparticle size and the surface chemical composition of four N-doped carbon nanoparticles on the growth of Escherichia coli bacteria. Our results were analyzed using a Ligand-Substrate model based on the Monod´s equation, which allows us to interpret the dependence of the nanoparticle-bacteria affinity with the nanomaterial structure.

show abstract

Manufacturing ordered films of nanoparticles by Langmuir–Blodgett technique

Cited by 3 publications

References 88 publications

N-Doped Carbon Nanoparticles as Antibacterial Agents on Escherichia coli: The Role of the Size and Chemical Composition of Nanoparticles

N-Doped Carbon Nanoparticles as Antibacterial Agents on Escherichia coli: The Role of the Size and Chemical Composition of Nanoparticles

Assembly, Properties, and Application of Ordered Group II–VI and IV–VI Colloidal Semiconductor Nanoparticle Films

N-Doped Carbon Nanoparticles As Antibacterial Agents: The Role of the Chemical Composition on the Antibacterial Activity

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