Synthesis and characterization of polypyrrole-platinum nanocomposite-coated latex particles

Takeoka, Hiroaki; Hamasaki, Hiroyuki; Harada, Yoshio; Nakamura, Yoshinobu; Fujii, Syuji

doi:10.1007/s00396-015-3534-7

Cited by 9 publications

(4 citation statements)

References 36 publications

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“…Interestingly, the PS/PPy particles (Py 5, 10 wt %) showed similar spectra with that of the PPy homopolymer, even though the PS/PPy particles consist of 93.7% and 88.6% PS components, and no signals attributable to the PS core component were observed. Those results should be due to the “core/shell” morphology of the PS/PPy particles: it was reported that the PPy shell could absorb the Raman excitation light and/or attenuate the signal originated from the underlying materials, which was known as the “skin-effect”. ,− In the spectrum of the PS/PPy particles (Py 1 wt %), a characteristic signal due to the PS component (998 cm –1 ) could also be observed, which should indicate the PPy shell formed a patchy structure on the surface of PS seed particles.…”

Section: Resultsmentioning

confidence: 99%

Monodispersed Nitrogen-Containing Carbon Capsules Fabricated from Conjugated Polymer-Coated Particles via Light Irradiation

et al. 2021

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Near-infrared (NIR) light irradiation induced the transformation of polypyrrole (PPy) to nitrogen-containing carbon (NCC) material due to its light-toheat photothermal property. The temperature of the PPy increased over 700 °C within a few seconds by the NIR laser irradiation, and elemental microanalysis confirmed the decreases of hydrogen and chloride contents and increases of carbon and nitrogen contents. Monodispersed polystyrene (PS)-core/PPy shell particles (PS/PPy particles) synthesized by aqueous chemical oxidative seeded polymerization were utilized as a precursor toward monodispersed NCC capsules. When the NIR laser was irradiated to the PS/PPy particles, the temperature rose to approximately 300 °C and smoke was generated, indicating that the PS component forming the core was thermally decomposed and vaporized. Scanning electron microscopy studies revealed the successful formation of spherical and highly monodispersed capsules, and Fourier transform infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy studies confirmed the capsules consisted of NCC materials. Furthermore, sunlight was also demonstrated to work as a light source to fabricate NCC capsules. The size and thickness of the capsules can be controlled between 1 and 80 μm and 146 and 231 nm, respectively, by tuning the size of the original PS/PPy particles and PPy shell thickness.

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Section: Resultsmentioning

confidence: 99%

Monodispersed Nitrogen-Containing Carbon Capsules Fabricated from Conjugated Polymer-Coated Particles via Light Irradiation

et al. 2021

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“…These results arose from the “core/sheath” morphology of the cotton/PPy fibers. Here, the PPy sheath absorbed the Raman excitation light and attenuated the signal originating from the underlying cotton (skin effect). ,− In the spectrum of the cotton/PPy fibers (Py 1 wt %), signals due to the cotton component (1148, 1118, 1092 cm –1 ) were also observed in addition to signals for PPy, which indicated that the PPy sheath formed a patchy structure on the surfaces of the cotton fibers.…”

Section: Resultsmentioning

confidence: 99%

Nitrogen-Containing Carbon Tubes Fabricated by Light Irradiation

Matsui,

Yamamoto,

Oyama

et al. 2024

Langmuir

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Cotton-core/polypyrrole (PPy)-sheath fibers (cotton/PPy fibers) were synthesized by aqueous chemical oxidative seeded polymerization and were utilized as precursors for nitrogencontaining carbon (NCC) tubes. Irradiation of the cotton/PPy fibers with a near-infrared (NIR) laser heated them to approximately 300 °C due to light-to-heat photothermal conversion by the PPy, and the cotton core was thermally decomposed and vaporized. Scanning electron microscopy studies revealed the formation of tubes with monodispersed diameters, and elemental microanalysis, Fourier transform infrared spectroscopy, and Raman spectroscopy confirmed that the PPy sheath was converted into NCC. Furthermore, sunlight also worked as the light source in fabricating the NCC tubes. The thicknesses of the tubes were controlled between 410 nm and 2.30 μm by tuning the PPy sheath thickness. The method developed in this study can be extended to other polymeric fibers, including acrylic and wool fibers. The shapes of the cross sections and surface nanomorphologies of the NCC tubes can be reflected in those of the polymer/PPy fibers.

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“…Conductive polymers nanocomposites equipped with metals nanoparticles offers exciting methods for exploring the probability of constructing many devices and incorporating their functionality into many disciplines [5]. Therefore, metallic nanoparticles and polymers have evoked a variety of researchers' involvement in synthesizing nanocomposite materials [6]. In fact, PPy-Ag nanocomposites demonstrate superior efficiency in optoelectronics and catalytic sensing in comparison to pure PPy nanocomposites [7].…”

Section: Introductionmentioning

confidence: 99%

A Study of Crystallographic and DC Electrical Characteristics of PPy/Ag Nanocomposites

Salman

Hassan

2021

IJP

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Polypyrrole and polypyrrole / silver nanocomposites were fabricated by in-situ polymerization employing Ammonium Persulphate as an oxidizing agent. Nanocomposites were synthesized by combining polypyrrole and silver nanoparticles in various weight percentages (0.1%, 0.5%, 3%, 5% and 7% wt.). Crystallographic data were collected using X-ray diffraction. PPy particles were found to have an orthorhombic symmetry. In contrast, PPy/Ag nanocomposites were reported to have monoclinic structure. The crystallite size was determined by XRD using Scherrer equation and considered to be within 49 nm range. DC conductivity of pelletized samples was evaluated in the temperature range of 323.15k to 453.15k. The conductivity displayed an increase when the temperature is increased from 323.15k to 453.15k. Activation energies were determined from plots of Arrhenius for all nanocomposites. The findings indicated that the activation energy decrease with increasing the weight percentage of Ag nanoparticles in the nanocomposites.

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Synthesis and characterization of polypyrrole-platinum nanocomposite-coated latex particles

Cited by 9 publications

References 36 publications

Monodispersed Nitrogen-Containing Carbon Capsules Fabricated from Conjugated Polymer-Coated Particles via Light Irradiation

Monodispersed Nitrogen-Containing Carbon Capsules Fabricated from Conjugated Polymer-Coated Particles via Light Irradiation

Nitrogen-Containing Carbon Tubes Fabricated by Light Irradiation

A Study of Crystallographic and DC Electrical Characteristics of PPy/Ag Nanocomposites

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