Title: Characterisation of nanomaterial hydrophobicity using engineered surfaces
Citation: JOURNAL OF NANOPARTICLE RESEARCH vol. 19 no. 3 p. 117
Publisher: SPRINGER
Publication Year: 2017
JRC N°: JRC105946
ISSN: 1388-0764
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC105946
DOI: 10.1007/s11051-017-3804-z
Type: Articles in periodicals and books
Abstract: Characterisation of engineered nanomaterials (NMs) is of outmost importance for the assessment of the potential risks arising from their extensive use. NMs display indeed a large variety of physico-chemical properties that drastically affect their interaction with biological systems. Among them, hydrophobicity is an important property that is nevertheless only slightly covered by the current physico-chemical characterisation techniques. In this work, we developed a method for the direct characterisation of NM hydrophobicity. The determination of the nanomaterial hydrophobic character is carried out by the direct measurement of the affinity of the NMs for different collectors. Each collector is an engineered surface designed in order to present specific surface charge and hydrophobicity degrees. Being thus characterised by a combination of surface energy components, the collectors enable the NM immobilisation with surface coverage in relation to their hydrophobicity. The experimental results are explained by using the extended DLVO theory, which takes into account the hydrophobic forces acting between NMs and collectors.
JRC Directorate:Health, Consumers and Reference Materials

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