Effects of surface coating character and interactions with natural organic matter on the colloidal stability of gold nanoparticles

2016 ◽  
Vol 3 (5) ◽  
pp. 1144-1152 ◽  
Author(s):  
M. C. Surette ◽  
J. A. Nason
Keyword(s):  
Gold Nanoparticles ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Significant Role ◽  
Surface Coating ◽  
Colloidal Stability ◽  
Surface Coatings

Character of engineered surface coatings plays a significant role in controlling ENM interactions with model NOM macromolecules.

scholarly journals Colloidal stability of capped silver nanoparticles in natural organic matter-containing electrolyte solutions

NanoImpact ◽  
2020 ◽  
Vol 19 ◽  
pp. 100242
Author(s):  
Leonardo Gutierrez ◽  
Andreas Schmid ◽  
Noor Zaouri ◽  
Daniel Garces ◽  
Jean-Philippe Croue
Keyword(s):  
Silver Nanoparticles ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Colloidal Stability ◽  
Electrolyte Solutions

In situ synthesis of multidentate PEGylated chitosan modified gold nanoparticles with good stability and biocompatibility

RSC Advances ◽  
2015 ◽  
Vol 5 (86) ◽  
pp. 70109-70116 ◽  
Author(s):  
Gongyan Liu ◽  
Quanqing Luo ◽  
Haibo Wang ◽  
Weihua Zhuang ◽  
Yunbing Wang
Keyword(s):  
Gold Nanoparticles ◽  
Surface Coating ◽  
Colloidal Stability ◽  
Biological Systems ◽  
In Situ Synthesis ◽  
Good Stability

To realize desirable functions in the rather complex biological systems, a suitable surface coating is desirable for gold nanoparticles, which plays an important role in their colloidal stability and biocompatibility.

Interactions between Natural Organic Matter and Gold Nanoparticles Stabilized with Different Organic Capping Agents

2011 ◽  
Vol 45 (8) ◽  
pp. 3238-3244 ◽  
Author(s):  
Dylan P. Stankus ◽  
Samuel E. Lohse ◽  
James E. Hutchison ◽  
Jeffrey A. Nason
Keyword(s):  
Gold Nanoparticles ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Capping Agents ◽  
Organic Capping

Photochemical transformations of thiolated polyethylene glycol coatings on gold nanoparticles

2016 ◽  
Vol 3 (5) ◽  
pp. 1090-1102 ◽  
Author(s):  
Stacey M. Louie ◽  
Justin M. Gorham ◽  
Eric A. McGivney ◽  
Jingyu Liu ◽  
Kelvin B. Gregory ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Polyethylene Glycol ◽  
Gold Nanoparticle ◽  
Uv Irradiation ◽  
Colloidal Stability ◽  
Chain Scission ◽  
Photochemical Reactions ◽  
Surface Coatings ◽  
Photochemical Transformations ◽  
Thiolated Polyethylene Glycol

Photochemical reactions can cause significant transformations of manufactured nanomaterials and their surface coatings in sunlit environments. In this study, loss of thiolated polyethylene glycol from gold nanoparticle surfaces by chain scission was observed under UV irradiation and resulted in diminished colloidal stability.

Co-effects of UV/H2O2 and natural organic matter on the surface chemistry of cerium oxide nanoparticles

2018 ◽  
Vol 5 (10) ◽  
pp. 2382-2393 ◽  
Author(s):  
Xuanhao Wu ◽  
Chelsea W. Neil ◽  
Doyoon Kim ◽  
Haesung Jung ◽  
Young-Shin Jun
Keyword(s):  
Organic Matter ◽  
Surface Chemistry ◽  
Cerium Oxide ◽  
Natural Organic Matter ◽  
Colloidal Stability ◽  
Chemical Properties ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Surface Chemical

This study delineates the co-effects of UV/H2O2 and NOM on the colloidal stability and surface chemical properties of CeO2 nanoparticles.

Effects of hydrophobicity-based fractions of Pony Lake fulvic acid on the colloidal stability and dissolution of oppositely charged surface-coated silver nanoparticles

2020 ◽  
Vol 17 (5) ◽  
pp. 400 ◽  
Author(s):  
YounJung Jung ◽  
Gabriele E. Schaumann ◽  
Seungyun Baik ◽  
George Metreveli
Keyword(s):  
Molecular Weight ◽  
Silver Nanoparticles ◽  
Organic Matter ◽  
Fulvic Acid ◽  
Functional Groups ◽  
Natural Organic Matter ◽  
Colloidal Stability ◽  
Coating Materials ◽  
Polar Functional Groups ◽  
Oppositely Charged

Environmental contextThe fate of silver nanoparticles (AgNPs) in aqueous systems could be influenced by the hydrophobicity of natural organic matter. We observed that the aggregation and dissolution of oppositely charged AgNPs were controlled by the selectivity and dynamics of sorption processes involving the nanoparticle surface and hydrophobic groups on natural organic matter. These findings will be helpful to understand the fate and effects of coated AgNPs in natural systems. AbstractThe fate of silver nanoparticles (AgNPs) released into aquatic environments is significantly affected by natural organic matter (NOM). However, current studies are still insufficient to understand interactions between NOM and AgNPs because they do not explicitly consider the heterogeneity of NOM. We investigated how NOM components with different properties (hydrophobicity, molecular weight, aromaticity, and polarity of functional groups) interact with AgNPs coated with citrate (Cit) and branched polyethylenimine (BPEI) and influence their colloidal stability and dissolution. Pony Lake fulvic acid (PLFA) selected as a model NOM was fractionated into hydrophobic (HPO) and transphilic (TPI) fractions. Sorption of PLFA molecules with a high content of polar functional groups bound to the aromatic rings onto nanoparticles was more favourable in the case of the TPI fraction, which most likely resulted in higher aggregation for both AgNPs and stronger protection of BPEI-AgNPs against dissolution compared with the HPO fraction. Additionally, in contrast to the Cit-AgNPs, resorption of Ag+ ions released from BPEI-AgNPs and/or sorption of Ag+-PLFA complexes to the nanoparticles was most likely a dynamic process, as suggested by the time-dependent changes in the molecular weight of the PLFA fractions sorbed to the BPEI-AgNP surface. These observations suggest that the accessibility of the AgNP surface for the hydrophobicity-based fractions of NOM as well as their colloidal stability and dissolution are controlled by the type and charge of coating materials and by the molecular weight, aromaticity, and content of polar functional groups of NOM.

scholarly journals Effects of natural organic matter (NOM), metal-to-sulfide ratio and Mn2+ on cadmium sulfide nanoparticle growth and colloidal stability

2020 ◽  
Vol 7 (11) ◽  
pp. 3385-3404
Author(s):  
Kevin Hoffmann ◽  
Iso Christl ◽  
Ralf Kaegi ◽  
Ruben Kretzschmar
Keyword(s):  
Organic Matter ◽  
Crystal Lattice ◽  
Cadmium Sulfide ◽  
Natural Organic Matter ◽  
Colloidal Stability ◽  
Cds Nanoparticles ◽  
Nanoparticle Growth ◽  
Naturally Occurring

Growth of naturally occurring CdS nanoparticles is constrained by natural organic matter (NOM), which also limits the reduction of CdS colloidal stability by Mn2+ and prevents incorporation of Mn into the CdS crystal lattice.

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