Surface charge-dependent bioaccumulation dynamics of silver nanoparticles in freshwater algae

Chemosphere ◽  
2020 ◽  
Vol 247 ◽  
pp. 125936 ◽  
Author(s):  
Jilai Zhang ◽  
Qianqian Xiang ◽  
Lin Shen ◽  
Jian Ling ◽  
Chuanhua Zhou ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Surface Charge ◽  
Freshwater Algae

Bio-fabricated silver nanoparticles preferentially targets Gram positive depending on cell surface charge

2016 ◽  
Vol 83 ◽  
pp. 548-558 ◽  
Author(s):  
Debasis Mandal ◽  
Sandeep Kumar Dash ◽  
Balaram Das ◽  
Sourav Chattopadhyay ◽  
Totan Ghosh ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Cell Surface ◽  
Surface Charge ◽  
Gram Positive ◽  
Cell Surface Charge

scholarly journals Нелинейное поглощение растворов метиленового голубого в присутствии плазмонных наночастиц с различным поверхностным зарядом

2020 ◽  
Vol 128 (9) ◽  
pp. 1380
Author(s):  
А.П. Русинов ◽  
М.Г. Кучеренко
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Mathematical Models ◽  
Surface Charge ◽  
Light Absorption ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Optical Nonlinearity ◽  
Dye Molecules ◽  
Gold And Silver Nanoparticles

By continuous-pump Z-scanning, the nonlinear light absorption of aqueous and alcohol solutions of methylene blue was studied. It was shown that the mechanisms of optical nonlinearity of these solutions vary depending on the dye concentration and type of solvent. The dependence of the amplitude of nonlinear absorption of dye molecules on the concentration and sign of the surface charge of gold and silver nanoparticles in solution is revealed. Mathematical models of optical nonlinearity for concentrated and diluted solutions of dye molecules are considered; in the latter case, the influence of plasmon nanoparticles on the nonlinear optical characteristics of methylene blue solutions is taken into account

Combined Toxicity of Silver Nanoparticles with Hematite or Plastic Nanoparticles toward Two Freshwater Algae

2019 ◽  
Vol 53 (7) ◽  
pp. 3871-3879 ◽  
Author(s):  
Bin Huang ◽  
Zhong-Bo Wei ◽  
Liu-Yan Yang ◽  
Ke Pan ◽  
Ai-Jun Miao
Keyword(s):  
Silver Nanoparticles ◽  
Freshwater Algae ◽  
Combined Toxicity

Surface Charge-Dependent Toxicity of Silver Nanoparticles

2011 ◽  
Vol 45 (1) ◽  
pp. 283-287 ◽  
Author(s):  
Amro M. El Badawy ◽  
Rendahandi G. Silva ◽  
Brian Morris ◽  
Kirk G. Scheckel ◽  
Makram T. Suidan ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Surface Charge

scholarly journals Study on the Release and Bioevaluations of Green Silver Nanoparticles Entrapped Inside Polymer-based Nanovesicles

2018 ◽  
Vol 55 (4) ◽  
pp. 696-699
Author(s):  
Maria Proks ◽  
Florin Borcan ◽  
Adelina Cheveresan ◽  
Iulia Pinzaru ◽  
Bogdan Almajan Guta ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Surface Charge ◽  
Release Rate ◽  
Noble Metals ◽  
Drug Carriers ◽  
Prolonged Release ◽  
Herbal Extracts ◽  
Good Thermal Stability ◽  
Toxicological Effects ◽  
Invasive Techniques

The drug carriers represent a very important and modern pathway used to increase the therapeutic efficacy of the natural active substances. Nano-sized assemblies of noble metals and herbal extracts represent very simple, cheap, biologically and ecologically friendly synthesis. The main aims of this study were to obtain polyurethane nanovesicles containing silver nanoparticles and to evaluate their release rate. The vesicles� sizes, homogeneity and surface charge were studied using a Cordouan Technol. Zetasizer, while the thermal behaviour was assessed by DSC. UV-Vis measurements were done to evaluate the release rate. Toxicological effects were studied by non-invasive techniques on human skin. The results suggest the obtaining of homogenous polyurethane nanovesicles between 80 and 95 nm, with positive surface charge, very good thermal stability and a prolonged release. The non-irritation potential recommends these vesicles as a safe carrier for different herbal extracts.

scholarly journals Effect of Laundry Surfactants on Surface Charge and Colloidal Stability of Silver Nanoparticles

Langmuir ◽  
2013 ◽  
Vol 29 (28) ◽  
pp. 8882-8891 ◽  
Author(s):  
Sara Skoglund ◽  
Troy A. Lowe ◽  
Jonas Hedberg ◽  
Eva Blomberg ◽  
Inger Odnevall Wallinder ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Surface Charge ◽  
Colloidal Stability

scholarly journals Surface Coating-Modulated Phytotoxic Responses of Silver Nanoparticles in Plants and Freshwater Green Algae

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 24
Author(s):  
Renata Biba ◽  
Karla Košpić ◽  
Bruno Komazec ◽  
Dora Markulin ◽  
Petra Cvjetko ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Surface Coating ◽  
Freshwater Algae ◽  
Growth Physiology ◽  
Gene And Protein Expression ◽  
Wide Range ◽  
Overall Stability ◽  
Particle Size And Shape ◽  
Coating Agents ◽  
Transformation Processes

Silver nanoparticles (AgNPs) have been implemented in a wide range of commercial products, resulting in their unregulated release into aquatic as well as terrestrial systems. This raises concerns over their impending environmental effects. Once released into the environment, they are prone to various transformation processes that modify their reactivity. In order to increase AgNP stability, different stabilizing coatings are applied during their synthesis. However, coating agents determine particle size and shape and influence their solubility, reactivity, and overall stability as well as their behavior and transformations in the biological medium. In this review, we attempt to give an overview on how the employment of different stabilizing coatings can modulate AgNP-induced phytotoxicity with respect to growth, physiology, and gene and protein expression in terrestrial and aquatic plants and freshwater algae.

scholarly journals Silver Nanoparticles Agglomerate Intracellularly Depending on the Stabilizing Agent: Implications for Nanomedicine Efficacy

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1953
Author(s):  
Marina R. Mulenos ◽  
Henry Lujan ◽  
Lauren R. Pitts ◽  
Christie M. Sayes
Keyword(s):  
Silver Nanoparticles ◽  
Surface Charge ◽  
Biological Fluids ◽  
High Surface ◽  
Lung Surfactant ◽  
Particle Surface ◽  
High Surface Area ◽  
Engineered Nanoparticles ◽  
Visible Absorption

Engineered nanoparticles are utilized as drug delivery carriers in modern medicine due to their high surface area and tailorable surface functionality. After in vivo administration, nanoparticles distribute and interact with biomolecules, such as polar proteins in serum, lipid membranes in cells, and high ionic conditions during digestion. Electrostatic forces and steric hindrances in a nanoparticle population are disturbed and particles agglomerate in biological fluids. Little is known about the stability of nanoparticles in relation to particle surface charge. Here, we compared three different surface-stabilized silver nanoparticles (50 nm) for intracellular agglomeration in human hepatocellular carcinoma cells (HepG2). Nanoparticles stabilized with branched polyethyleneimine conferred a positive surface charge, particles stabilized with lipoic acid conferred a negative surface charge, and particles stabilized with polyethylene glycol conferred a neutral surface charge. Particles were incubated in fetal bovine serum, simulated lung surfactant fluid, and simulated stomach digestion fluid. Each nanoparticle system was characterized via microscopic (transmission electron, fluorescence, and enhanced darkfield) and spectroscopic (hyperspectral, dynamic light scattering, and ultraviolet-visible absorption) techniques. Results showed that nanoparticle transformation included cellular internalization, agglomeration, and degradation and that these changes were dependent upon surface charge and incubation matrix. Hyperspectral analyses showed that positively charged silver nanoparticles red-shifted in spectral analysis after transformations, whereas negatively charged silver nanoparticles blue-shifted. Neutrally charged silver nanoparticles did not demonstrate significant spectral shifts. Spectral shifting indicates de-stabilization in particle suspension, which directly affects agglomeration intracellularly. These characteristics are translatable to critical quality attributes and can be exploited when developing nano-carriers for nanomedicine.

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