A novel method for making highly dispersible conducting polymer and concentric graphitic carbon nano-spheres based on an undoped and functionalized polyaniline

Han, Chien‐Chung; Bai, Meng–Yi; Yang, Ku-Feng; Lee, Yi-Shuan; Lin, Chia-Wei

doi:10.1039/b804131h

Cited by 24 publications

(9 citation statements)

References 49 publications

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“…In the past few decades, much excellent research on the shape‐controlled synthesis of PANI nanostructures, such as nanofibers, nanoshperes, and nanotubes, has been reported 2, 3, 7–10. However, it may be noted that only a few researches have been done on the fabrication of uniform PANI nanospheres, which are particularly interesting for optoelectronics and sensors due to their large surface area 11, 12. As one knows, most of the previously reported methods for making PANI nanospheres are essentially limited in aqueous medium, which may result in the unstable nature of PANI nanospheres and further aggregation to change their morphology and size dramatically 8–10, 13, 14.…”

Section: Introductionmentioning

confidence: 99%

Nonaqueous synthesis of uniform polyaniline nanospheres Via cellulose acetate template

Zhang

Cao

et al. 2011

J. Polym. Sci. A Polym. Chem.

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In acetone solution, uniform polyaniline (PANI) nanospheres have been successfully synthesized by using cellulose acetate (CA) as a single template, which provides the first example of uniform PANI nanospheres synthesized in nonaqueous system. Our result exhibits that the CA micelle in nonaqueous medium plays a unique role in controlling size and uniformity of PANI nanospheres. A detail formation mechanism for the uniform PANI nanospheres has been proposed. In addition, the gas sensitivity and time response of the PANI nanospheres to NH 3 gas have been investigated, which shows superior gas sensing performance even at 1 ppm of NH 3 gas.

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Section: Introductionmentioning

confidence: 99%

Nonaqueous synthesis of uniform polyaniline nanospheres Via cellulose acetate template

Zhang

Cao

et al. 2011

J. Polym. Sci. A Polym. Chem.

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“…The reflectance spectra in the range of 220–255 nm may be correlated with π–π* electron transition within the para-substituted benzenoid units. , The π–π* excitations corresponding to the conjugated PANI chains (namely, benzenoid ring) of PANI-ES, PANI-EB, and PANI-ES/PANI-EB are observed at 318, 328, and 353 nm, respectively. , The peaks in the reflectance spectra at 409, 472, and 477 nm are associated with the polaron−π* transition of the PANI samples . Further, the reflectance peak at ∼513 nm is contributed by bipolaron transition of benzenoid π and quinoid π* rings of PANI films. , …”

Section: Resultsmentioning

confidence: 98%

Heterostructured Layer Growth of Polyaniline by Vacuum Thermal Evaporation and Fabrication of Thin-Film Capacitors

2019

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Thin films of conducting polymers find applications in many emerging areas, such as packaging, sensing, coating, thin-film capacitors, organic integrated circuits, organic thin wires, and electroluminescent devices. The success of thin-film-based devices relies on precisely controlled thickness (∼100 nm) and surface characteristics. Tailored-made properties can be harnessed by preparing thin films by multiple coatings (namely, layer-by-layer deposition), which results in heterogeneity within the film required for special applications. In spite of excellent electrical conductivity of Polyaniline (PANI), the fabrication of thin-film-based devices is restricted because of its brittleness. Herein, we report the preparation of bilayer thin films of PANI along with the individual thin films of PANI-emeraldine salt (ES) and PANIemeraldine base (EB) using the vacuum thermal evaporation method. Detailed structural and morphological analysis shows the formation of well-organized PANI thin films with a roughness of ≈ 10 nm and the thickness ranging from 50 to 100 nm. PANI-ES shows the highest electrical, dielectric, and electrostatic charge properties, which is attributed to the crystalline structure as revealed by X-ray diffraction analysis. All the thin films show semiconducting behavior as revealed by the band gap analysis (1.7−2.2 eV). The optical constants of the bilayer film measured from spectroscopic ellipsometry show a marginal deviation from the individual films, which is attributed to the interfacial interaction between the layers of PANI-ES and PANI-EB. Thinfilm capacitors based on PANI-ES show the highest current and energy density compared to those based on PANI-EB and bilayer films.

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“…We then recorded a UV/vis spectrum for the completely undoped sample. The spectrum shows typical absorption peaks for the undoped form (emaraldine base) of PAni reported in the literature 17. Because there is no solvent for dissolving PPy shells, we were unable to obtain UV/vis spectra for the resultant PPy.…”

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confidence: 87%

Colloidal Hollow Spheres of Conducting Polymers with Smooth Surface and Uniform, Controllable Sizes

Bai

Cheng

Wickline

et al. 2009

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A novel method for making highly dispersible conducting polymer and concentric graphitic carbon nano-spheres based on an undoped and functionalized polyaniline

Cited by 24 publications

References 49 publications

Nonaqueous synthesis of uniform polyaniline nanospheres Via cellulose acetate template

Nonaqueous synthesis of uniform polyaniline nanospheres Via cellulose acetate template

Heterostructured Layer Growth of Polyaniline by Vacuum Thermal Evaporation and Fabrication of Thin-Film Capacitors

Colloidal Hollow Spheres of Conducting Polymers with Smooth Surface and Uniform, Controllable Sizes

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