Interaction between manufactured gold nanoparticles and naturally occurring organic macromolecules

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Interaction between manufactured gold nanoparticles and naturally occurring organic macromolecules. / Diegoli, S.; Manciulea, A.L.; Begum, Shakiela; Jones, I.P.; Lead, J.R.; Preece, J.A.

In: Science of the Total Environment, Vol. 402, No. 1, 25.08.2008, p. 51-61.

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@article{b9d8610e350c42a6a64e1dfe67f366b6,
title = "Interaction between manufactured gold nanoparticles and naturally occurring organic macromolecules",
abstract = "The increasing exploitation of nanomaterials into many consumer and other products is raising concerns as these nanomaterials are likely to be released into the environment. Due to our lack of knowledge about the environmental chemistry, transport and ecotoxicology of nanomaterials, it is of paramount importance to study how natural aquatic colloids can interact with manufactured gold nanoparticles as these interactions will determine their environmental fate and behaviour. In this context, our work aims to quantify the effect of naturally occurring riverine macromolecules - International Humic Substances Society (IHSS) Suwannee River Humic Acid Standard (SRHA) - on citrate- and acrylate-stabilized gold nanoparticles. The influence of SRHA on the stability of the gold colloids was studied as a function of pH by UV-visible absorption spectroscopy, dynamic light scattering (DLS) and transmission electron microscopy (TEM). At high ionic strengths (0.1 M), extensive and rapid aggregation occurred, while more subtle effects were observed at lower ionic strength values. Evidence was found that SRHA enhances particle stability at extreme pH values (ionic strength <0.01 M) by substituting and/or over-coating the original stabilizer on the gold nanoparticle surface, thus affecting surface charge and chemistry. These findings have important implications for the fate and behaviour of nanoparticles in the environment and their ecotoxicity. ",
keywords = "ecotoxicity, TEM, humic substances, gold nanoparticles, UV-visible absorption spectroscopy",
author = "S. Diegoli and A.L. Manciulea and Shakiela Begum and I.P. Jones and J.R. Lead and J.A. Preece",
note = "MEDLINE{\textregistered} is the source for the MeSH terms of this document.",
year = "2008",
month = aug,
day = "25",
doi = "10.1016/j.scitotenv.2008.04.023",
language = "English",
volume = "402",
pages = "51--61",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier",
number = "1",

}

RIS

TY - JOUR

T1 - Interaction between manufactured gold nanoparticles and naturally occurring organic macromolecules

AU - Diegoli, S.

AU - Manciulea, A.L.

AU - Begum, Shakiela

AU - Jones, I.P.

AU - Lead, J.R.

AU - Preece, J.A.

N1 - MEDLINE® is the source for the MeSH terms of this document.

PY - 2008/8/25

Y1 - 2008/8/25

N2 - The increasing exploitation of nanomaterials into many consumer and other products is raising concerns as these nanomaterials are likely to be released into the environment. Due to our lack of knowledge about the environmental chemistry, transport and ecotoxicology of nanomaterials, it is of paramount importance to study how natural aquatic colloids can interact with manufactured gold nanoparticles as these interactions will determine their environmental fate and behaviour. In this context, our work aims to quantify the effect of naturally occurring riverine macromolecules - International Humic Substances Society (IHSS) Suwannee River Humic Acid Standard (SRHA) - on citrate- and acrylate-stabilized gold nanoparticles. The influence of SRHA on the stability of the gold colloids was studied as a function of pH by UV-visible absorption spectroscopy, dynamic light scattering (DLS) and transmission electron microscopy (TEM). At high ionic strengths (0.1 M), extensive and rapid aggregation occurred, while more subtle effects were observed at lower ionic strength values. Evidence was found that SRHA enhances particle stability at extreme pH values (ionic strength <0.01 M) by substituting and/or over-coating the original stabilizer on the gold nanoparticle surface, thus affecting surface charge and chemistry. These findings have important implications for the fate and behaviour of nanoparticles in the environment and their ecotoxicity.

AB - The increasing exploitation of nanomaterials into many consumer and other products is raising concerns as these nanomaterials are likely to be released into the environment. Due to our lack of knowledge about the environmental chemistry, transport and ecotoxicology of nanomaterials, it is of paramount importance to study how natural aquatic colloids can interact with manufactured gold nanoparticles as these interactions will determine their environmental fate and behaviour. In this context, our work aims to quantify the effect of naturally occurring riverine macromolecules - International Humic Substances Society (IHSS) Suwannee River Humic Acid Standard (SRHA) - on citrate- and acrylate-stabilized gold nanoparticles. The influence of SRHA on the stability of the gold colloids was studied as a function of pH by UV-visible absorption spectroscopy, dynamic light scattering (DLS) and transmission electron microscopy (TEM). At high ionic strengths (0.1 M), extensive and rapid aggregation occurred, while more subtle effects were observed at lower ionic strength values. Evidence was found that SRHA enhances particle stability at extreme pH values (ionic strength <0.01 M) by substituting and/or over-coating the original stabilizer on the gold nanoparticle surface, thus affecting surface charge and chemistry. These findings have important implications for the fate and behaviour of nanoparticles in the environment and their ecotoxicity.

KW - ecotoxicity

KW - TEM

KW - humic substances

KW - gold nanoparticles

KW - UV-visible absorption spectroscopy

UR - http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-46549086628&md5=13cb26188a2c24a501ee98e3c0cedcfc

U2 - 10.1016/j.scitotenv.2008.04.023

DO - 10.1016/j.scitotenv.2008.04.023

M3 - Article

C2 - 18534664

VL - 402

SP - 51

EP - 61

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

IS - 1

ER -