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Size-Dependent Thermo- and Photoresponsive Plasmonic Properties of Liquid Crystalline Gold Nanoparticles

Laboratory of Organic Nanomaterials and Biomolecules, Faculty of Chemistry, University of Warsaw, Pasteura 1 Street, 02-093 Warsaw, Poland
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Materials 2020, 13(4), 875; https://doi.org/10.3390/ma13040875
Received: 8 January 2020 / Revised: 9 February 2020 / Accepted: 11 February 2020 / Published: 15 February 2020
(This article belongs to the Special Issue Functional Surface Structures and Thin Solid Films)
Achieving remotely controlled, reversibly reconfigurable assemblies of plasmonic nanoparticles is a prerequisite for the development of future photonic technologies. Here, we obtained a series of gold-nanoparticle-based materials which exhibit long-range order, and which are controlled with light or thermal stimuli. The influence of the metallic core size and organic shell composition on the switchability is considered, with emphasis on achieving light-responsive behavior at room temperature and high yield production of nanoparticles. The latter translates to a wide size distribution of metallic cores but does not prevent their assembly into various, switchable 3D and 2D long-range ordered structures. These results provide clear guidelines as to the impact of size, size distribution, and organic shell composition on self-assembly, thus enhancing the smart design process of multi-responsive nanomaterials in a condensed state, hardly attainable by other self-assembly methods which usually require solvents. View Full-Text
Keywords: nanoparticles; liquid crystals; self-assembly; photoresponsive materials; surface plasmon resonance nanoparticles; liquid crystals; self-assembly; photoresponsive materials; surface plasmon resonance
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MDPI and ACS Style

Promiński, A.; Tomczyk, E.; Pawlak, M.; Jędrych, A.; Mieczkowski, J.; Lewandowski, W.; Wójcik, M. Size-Dependent Thermo- and Photoresponsive Plasmonic Properties of Liquid Crystalline Gold Nanoparticles. Materials 2020, 13, 875.

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