A promising visible light-driven photocatalytic activity of conjugated polymer nanocrystals

Pornrungroj, Chanon; Ozawa, Mamiko; Onodera, Tsunenobu; Oikawa, Hidetoshi

doi:10.1039/c8ra07837h

Cited by 7 publications

(2 citation statements)

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“…Well, organic and inorganic hybridizations on micro-/nanoscale levels, i.e., hybridized micro-/nanomaterials, have been also investigated over a wide range from the viewpoints of basic science and some practical applications. − At the same time, many types of hybridization processes have been developed increasingly so as to well and specifically control micro-/nanosurfaces and interfaces, − including bio- and life science. − Under such research backgrounds and trends, metal core–PDA shell type hybridized nanocrystals (NCs) have been prepared successfully for the first time by the coreprecipitation method. , Subsequently, the visible light-driven photocatalytic reduction method has been established to fabricate PDA core–metal shell type hybridized NCs. , This method was capable of applying to hybridization of PDA nanorods and nanofibers (NFs) with a metal shell . These hybridized PDA NCs exhibited interestingly photocatalytic function and fluorescence emission enhancement . Especially, it has become apparent recently that third-order NLO susceptibility, χ (3) (ω), was enhanced remarkably in the layered type hybridized thin films consisting of oriented PDA NFs and silver (Ag) nanoparticles (NPs), mainly due to the localized surface plasmon resonance (LSPR) effect from Ag NPs …”

Section: Introductionmentioning

confidence: 99%

“…34,40 This method was capable of applying to hybridization of PDA nanorods and nanofibers (NFs) with a metal shell. 41 These hybridized PDA NCs exhibited interestingly photocatalytic function 42 and fluorescence emission enhancement. 43 cially, it has become apparent recently that third-order NLO susceptibility, χ (3) (ω), was enhanced remarkably in the layered type hybridized thin films consisting of oriented PDA NFs and silver (Ag) nanoparticles (NPs), mainly due to the localized surface plasmon resonance (LSPR) effect from Ag NPs.…”

Section: Introductionmentioning

confidence: 99%

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Structural Correlations of the Nonlinear Optical Response in Polydiacetylene Nanotubes Hybridized with Gold Nanoparticles

et al. 2022

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The nonlinear optical (NLO) properties of π-conjugated polydiacetylene (PDA) nanotubes (NTs) were enhanced by the localized surface plasmon resonance (LSPR) effect from gold (Au) nanoparticles (NPs). Three types of PDA NTs hybridized with Au NPs have been fabricated successfully, i.e., Au NPs deposited on the outer surface (outer type), on both outer and inner surfaces (outer/inner type), and on the inner surface (inner type). Third-order NLO susceptibility, χ(3)(ω), has been evaluated by transient transmission spectroscopy and spectroscopic ellipsometry, and then structural correlations of these optical data were discussed in detail. χ(3)(ω) was compared by newly proposing a figure of merit (FOM), which may reflect the generation efficiency for χ(3)(ω) based on the intensity of the excitonic absorption peak in PDA NTs because the NLO properties of PDA were originated from excitons. As a result, the outer/inner type has numerically provided the maximum of FOM by a factor of about 5 compared with original PDA NTs. The gap mode effect in a metal–insulator–metal-like nanostructure as well as the LSPR effect would be responsible for the increase in the FOM of the outer/inner type. Consequently, hybridized PDA NTs would open a new field toward all-optical and photonic device applications.

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