Fabrication of Organic Nanocrystals and Novel NanoHybrid Materials

Abstract

AbstractNonlinear optical (NLO) materials are required for the high-speed optical network systems dealing with a large amount of data. In particular, organic third-order NLO materials are powerful candidates for such optical devices because of the fast NLO response and easy processability in comparison with inorganics [1]. For example, polydiacetylene (PDA), classified as a one-dimensional π-conjugated polymer, possesses excellent third-order NLO response properties in the range of femtoseconds to subpicoseconds, which is attributed to delocalized π-conjugated electrons along the main chain backbone [2]. PDA crystals can be obtained through topochemical solid-state polymerization with phase transition from a diacetylene monomer single crystal to a polydiacetylene single crystal by UV-, γ-irradiation or heat treatment [3]. Thus far, the syntheses and optoelectronic properties of PDA derivatives have extensively been studied, especially the π-conjugation extended between main chain and side chains such as directly linked aromatic groups and ladder-type PDAs [2]. However, the magnitude of effective third-order NLO susceptibility χ(3)(ω) is still not sufficient for device applications.KeywordsSilver NanoparticlesStandard Hydrogen ElectrodePhotocatalytic ReductionDispersion LiquidSilver CationThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.