Characteristics and Behavior of Nanoparticles and Its Dispersion Systems

Kamiya, Hidehiro; Gotoh, Kuniaki; Uchikoshi, Tetsuo; Ōtani, Yoshio; Fuji, Masayoshi; Matsusaka, Shuji; Matsuyama, Tatsushi; Tatami, Junichi; Higashitani, Ko; Kurihara, Kazue; Ishida, Naoyuki; Suzuki, Michitaka; Abe, Hiroya; Otsubo, Yasufumi; Miyahara, Minoru

doi:10.1016/b978-044453122-3.50006-4

Cited by 15 publications

(7 citation statements)

References 136 publications

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“…According to DLVO (Derjaguin-Landau-Verwey-Overbeek) theory, nanostructures tend to agglomerate due to van der Waals interactions, which can be inhibited by the ligand layer, causing them to form a strong enough electrostatic repulsion so as to block the attraction between nanoparticles. 29 Rinsing sodium citrate from the aqueous nanoparticle suspension resulted in the removal of electrostatic repulsion, which promotes the agglomeration process of pure AgNPs.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of SnO₂shell followed by microwave treatment for high environmental stability of Ag nanoparticles

et al. 2020

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Section: Resultsmentioning

confidence: 99%

Facile synthesis of SnO₂shell followed by microwave treatment for high environmental stability of Ag nanoparticles

et al. 2020

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“…Several factors can influence the stability of colloidal suspensions, such as the adsorption of active molecules on the surface of the nanoparticles and the presence of adsorbed surfactants. Some physicochemical parameters that can be used to monitor the stability of polymeric colloidal suspensions are particle size, zeta potential, polymer molar mass distribution, drug content, and pH [85]. However, industrial application of polymeric NPs dispersed in aqueous media can be limited due to problems of low physicochemical stability, in prolonged storage periods [86].…”

Section: Stability Of Polymeric Nps Suspensionsmentioning

confidence: 99%

Polymeric Nanoparticles: Production, Characterization, Toxicology and Ecotoxicology

et al. 2020

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Polymeric nanoparticles (NPs) are particles within the size range from 1 to 1000 nm and can be loaded with active compounds entrapped within or surface-adsorbed onto the polymeric core. The term “nanoparticle” stands for both nanocapsules and nanospheres, which are distinguished by the morphological structure. Polymeric NPs have shown great potential for targeted delivery of drugs for the treatment of several diseases. In this review, we discuss the most commonly used methods for the production and characterization of polymeric NPs, the association efficiency of the active compound to the polymeric core, and the in vitro release mechanisms. As the safety of nanoparticles is a high priority, we also discuss the toxicology and ecotoxicology of nanoparticles to humans and to the environment.

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“…However, there is a high tendency for the particle's agglomeration. Generally, the dispersion and aggregation behavior of NPs is well controlled in the liquid phase by different mechanisms of surface particle interactions [55]. The FTIR analysis shows (Figure 5) that Cu-Au NPs are stabilized by some electrostatic interactions between the surface of the Cu-Au NPs and SDS.…”

Section: Temmentioning

confidence: 99%

High-Efficiency Biocidal Solution Based on Radiochemically Synthesized Cu-Au Alloy Nanoparticles

Lungulescu¹,

Setnescu

Patroi³

et al. 2021

Nanomaterials

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The use of nanotechnologies in the applied biomedical sciences can offer a new way to treat infections and disinfect surfaces, materials, and products contaminated with various types of viruses, bacteria, and fungi. The Cu-Au nanoparticles (NPs) were obtained by an eco-friendly method that allowed the obtaining in a one-step process of size controlled, well dispersed, fully reduced, highly stable NPs at very mild conditions, using high energy ionizing radiations. The gamma irradiation was performed in an aqueous system of Cu2+/Au3+/Sodium Dodecyl Sulfate (SDS)/Ethylene Glycol. After irradiation, the change of color to ruby-red was the first indicator for the formation of NPs. Moreover, the UV-Vis spectra showed a maximum absorption peak between 524 and 540 nm, depending on the copper amount. The Cu-Au NPs presented nearly spherical shapes, sizes between 20 and 90 nm, and a zeta potential of about −44 mV indicating a good electrostatic stability. The biocidal properties performed according to various standards applied in the medical area, in dirty conditions, showed a 5 lg reduction for Staphylococcus aureus, Pseudomonas aeruginosa, and Enterococcus hirae, a 5 lg reduction for both enveloped and non-enveloped viruses such as Adenovirus type 5, Murine Norovirus, and human Coronavirus 229E, and a 4 lg reduction for Candida albicans, respectively. Thus, the radiochemically synthesized Cu-Au alloy NPs proved to have high biocide efficiency against the tested bacteria, fungi, and viruses (both encapsulated and non-encapsulated). Therefore, these nanoparticle solutions are suitable to be used as disinfectants in the decontamination of hospital surfaces or public areas characterized by high levels of microbiological contamination.

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Characteristics and Behavior of Nanoparticles and Its Dispersion Systems

Cited by 15 publications

References 136 publications

Facile synthesis of SnO₂shell followed by microwave treatment for high environmental stability of Ag nanoparticles

Facile synthesis of SnO₂shell followed by microwave treatment for high environmental stability of Ag nanoparticles

Polymeric Nanoparticles: Production, Characterization, Toxicology and Ecotoxicology

High-Efficiency Biocidal Solution Based on Radiochemically Synthesized Cu-Au Alloy Nanoparticles

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Characteristics and Behavior of Nanoparticles and Its Dispersion Systems

Cited by 15 publications

References 136 publications

Facile synthesis of SnO2shell followed by microwave treatment for high environmental stability of Ag nanoparticles

Facile synthesis of SnO2shell followed by microwave treatment for high environmental stability of Ag nanoparticles

Polymeric Nanoparticles: Production, Characterization, Toxicology and Ecotoxicology

High-Efficiency Biocidal Solution Based on Radiochemically Synthesized Cu-Au Alloy Nanoparticles

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Product

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Facile synthesis of SnO₂shell followed by microwave treatment for high environmental stability of Ag nanoparticles

Facile synthesis of SnO₂shell followed by microwave treatment for high environmental stability of Ag nanoparticles