Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151235
Title: Impact of molecular linker size on physicochemical properties of assembled gold nanoparticle mono-/multi-layers and their applicability for functional binding of biomolecules
Authors: Krikstolaityte, Vida
Hamit-Eminovski, Jildiz
Abariute, Laura
Niaura, Gediminas
Meskys, Rolandas
Arnebrant, Thomas
Lisak, Grzegorz
Ruzgas, Tautgirdas
Keywords: Engineering::Environmental engineering
Issue Date: 2019
Source: Krikstolaityte, V., Hamit-Eminovski, J., Abariute, L., Niaura, G., Meskys, R., Arnebrant, T., Lisak, G. & Ruzgas, T. (2019). Impact of molecular linker size on physicochemical properties of assembled gold nanoparticle mono-/multi-layers and their applicability for functional binding of biomolecules. Journal of Colloid and Interface Science, 543, 307-316. https://dx.doi.org/10.1016/j.jcis.2019.02.048
Journal: Journal of Colloid and Interface Science
Abstract: In this work the impact of molecular inter-linker size on gold nanoparticle (AuNP) mono-/multilayer structural properties, density and homogeneity has been investigated. These characteristics are of great importance for functional binding of biomolecules. Positively charged high or low molecular weight inter-linkers, poly-L-lysine (PLL) or N-(6-mercapto)hexylpyridinium (MHP), were used to attach negatively charged AuNPs on a planar gold surface as well as to further interlink into a multilayer structure via layer-by-layer deposition. The inter-particle interaction within the assembled AuNP films was adjusted by the ionic strength in the AuNPs dispersions. The AuNP layer density and structural/viscoelastic properties were evaluated by the quartz crystal microbalance with dissipation (QCM-D) technique. The validity of the commercial Voigt model, specifically developed for quantitative QCM-D data analysis of homogeneous viscoelastic films, was evaluated by a model independent analysis when comparing the assembled AuNP films with a homogeneous layer of a mucin from bovine submaxillary glands. Both AuNP mono- and multilayers, attached/interlinked via long flexible PLL molecules assembled to denser and more soft/viscous structures compared to those interlinked by short MHP compounds. Thus, PLL-interlinked AuNP mono-/multilayer structures were further investigated as a platform for laccase enzyme functional adsorption via qualitative assessment of bioelectrochemical characteristics of the enzyme.
URI: https://hdl.handle.net/10356/151235
ISSN: 0021-9797
DOI: 10.1016/j.jcis.2019.02.048
Rights: © 2019 Elsevier Inc. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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