Behavior of colloidal gold nanoparticles in different ionic strength media
authors Barreto, A; Luis, LG; Girao, AV; Trindade, T; Soares, AMVM; Oliveira, M
nationality International
journal JOURNAL OF NANOPARTICLE RESEARCH
author keywords Nanoparticles; High ionic strength media; Seawater; Stability; Aggregation; Agglomeration; Coatings
keywords IN-VITRO; STABILITY; SIZE; CELL; PH; AGGREGATION; SCATTERING; TOXICITY; THERAPY; LIGANDS
abstract The increased applications of engineered nanoparticles (NPs) may lead to environmental release and transport to estuarine environments where NPs are expected to aggregate/agglomerate with increasing ionic strength. However, more stable NPs that may be resistant to high ionic strength media and more dispersed in the aquatic environment are being synthesized. Thus, understanding colloidal NPs' behavior in different ionic strength media is crucial for the assessment of the consequences of their environmental release. This work assessed the behavior of gold nanoparticles (AuNPs), with diverse sizes and coatings, in media with different ionic strengths (from biological buffers to artificial seawater). Overall, in biological buffers and artificial seawater, citrate-coated AuNPs were unstable, displaying significantly increased sizes (between 100 and 400 nm), whereas no significant alterations (less than 5 % oscillation) were found for AuNPs with other coatings (bovine serum albumin, polyvinylpyrrolidone, and polyethylene glycol). Data suggest that coated AuNPs, and probably other NPs, may be dispersed in the environment from freshwater to estuarine systems.
publisher SPRINGER
issn 1388-0764
year published 2015
volume 17
issue 12
digital object identifier (doi) 10.1007/s11051-015-3302-0
web of science category Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Chemistry; Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000368506800002
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journal analysis (jcr 2019):
journal impact factor 2.132
5 year journal impact factor 2.173
category normalized journal impact factor percentile 38.237
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