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- W2016117212 abstract "We report the alignment of liquid crystal (LC) 4-cyano-4ʹ-pentylbiphenyl (5CB) to well-defined films of alkanethiol-capped gold nanoparticles, residing at the LC/water interface and in optical sandwich cell configurations. Gold nanoparticles (AuNPs) of two core sizes (2.6 and 4.1 nm) were synthesised with a variety of alkyl chain lengths (CnH2n+1SH, for n = 5–18). Langmuir films of the nanoparticles were compressed to 10 mN/m and introduced to the LC/water interface via Langmuir–Schaefer transfer onto an ~20 μm thick film of LC. The 4.1 nm AuNP films consistently yield homeotropic alignment of the LC while the 2.6 nm AuNP films yield mixed alignments. These observations reflect differences in the AuNP film morphology, surface coverage and relatively weak anchoring strength of 5CB to the nanoparticle films. We determine the anchoring of 5CB to these alkanethiol-capped AuNP films at high coverage. This method can be applied to other types of nanoparticles and ligand shells for determining the LC anchoring to condensed films of water-insoluble nanoparticles with the goal of controlling nanoparticle–LC interactions." @default.
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- W2016117212 date "2015-03-26" @default.
- W2016117212 modified "2023-09-26" @default.
- W2016117212 title "Effects of gold nanoparticle film morphology on the alignment of a nematic liquid crystal" @default.
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- W2016117212 doi "https://doi.org/10.1080/02678292.2014.1002548" @default.
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