2014
DOI: 10.1166/jnn.2014.8598
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The Size Control of Nano-Cluster Formed on an Inorganic Nanosheet/Cationic Organic Molecule Hybrid Langmuir-Blodgett Film

Abstract: Organic molecules adsorbed on an inorganic nanosheet often form a nanometer-sized cluster. In this study, we propose novel strategy for controlling the cluster size. We fabricated hybrid Langmuir-Blodgett (LB) films consisting of N-n-octadecyl-4-[2-(4-dimethylaminophenyl)ethenyl]-pyridinium bromide and a clay mineral, sodium montmorillonite, with varying subphase temperature. As a result, the size of the clusters was found to be decreased from 300 nm to 50 nm by increasing the subphase temperature from 10 degr… Show more

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“…Organic molecules confined in the interlayer space of a clay mineral tend to form a partial H-aggregation even at a few %CEC. 8,45 Thus, the decrease of fluorescence quantum yield strongly suggests the partial formation of H-aggregates of DPDP in films with higher than 10%CEC because typical H-aggregates are not fluorescent. 52,53 Fluorescence quantum yield gradually decreased as the loading level of DPDP was increased from 10%CEC to 40%CEC.…”
Section: Resultsmentioning
confidence: 99%
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“…Organic molecules confined in the interlayer space of a clay mineral tend to form a partial H-aggregation even at a few %CEC. 8,45 Thus, the decrease of fluorescence quantum yield strongly suggests the partial formation of H-aggregates of DPDP in films with higher than 10%CEC because typical H-aggregates are not fluorescent. 52,53 Fluorescence quantum yield gradually decreased as the loading level of DPDP was increased from 10%CEC to 40%CEC.…”
Section: Resultsmentioning
confidence: 99%
“…Although the emission and absorption maxima observed for a film with 10%CEC were almost the same as those of the film with 1%CEC, the fluorescence quantum yield of the film with 10%CEC was almost half those of films with lower than 1%CEC. Organic molecules confined in the interlayer space of a clay mineral tend to partially form H-aggregates even at a few %CEC. , Thus, the decrease of fluorescence quantum yield strongly suggests the partial formation of H-aggregates of DPDP in films with higher than 10%CEC because typical H-aggregates are not fluorescent. , Fluorescence quantum yield gradually decreased as the loading level of DPDP was increased from 10%CEC to 40%CEC. The absorption behavior indicates that the percentage of H-aggregate in the interlayer of SSA becomes higher with increasing loading level of DPDP, and fluorescence was observed only from the monomer form of DPDP.…”
Section: Resultsmentioning
confidence: 99%
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