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|標題:||Orderly Arranged NLO Materials Based on Chromophore-Containing Dendrons on Exfoliated Layered Templates||作者:||Chen, Y.C.
|關鍵字:||cationic exchange capacity;dendron;montmorillonite;order arrangement;nonlinear-optical polymers;silicate nanocomposites;dendritic;surfactants;thermal-stability;side-chain;dendrimers;montmorillonite;fabrication;monolayers;alignment||Project:||Acs Applied Materials & Interfaces||期刊/報告no：:||Acs Applied Materials & Interfaces, Volume 1, Issue 10, Page(s) 2371-2381.||摘要:||
Three chromophore-containing dendrons were intercalated into montmorillonite layered silicates via an ion-exchange process Enlarged d spacings ranging from 50 to 126 angstrom were achieved for these novel organoclays After the organoclays were blended with a polyimide, the steric bulkiness of the dendrons and the interaction between dendron and polyimide resulted in an ordered morphology. The orderly arranged nanocomposites were characterized by a UV-visible spectrophotometer, a variable-temperature infrared spectrometer, and electro-optical modulation The dendrons in layered silicates were capable of undergoing a critical conformational change into an ordered structure, indicated by the drastic changes of interlayer distances at certain packing densities Electro-optical coefficients increased sharply from 0 to 6 pm/V while the conformational change occurred Furthermore,, the addition of a polyimide capable of interaction-induced orientation was found to exert an enhancing effect on the degree of the noncentrosymmetric alignment
|Appears in Collections:||材料科學與工程學系|
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