Improved electrical conductivity of poly(ethylene oxide) nanofibers using multi-walled carbon nanotubes

Lee, J. Y.; Kang, Taejin; Choi, Jonghyun; Choi, In-Gyu; Yu, Woong‐Ryeol

doi:10.1063/1.5026509

Cited by 11 publications

(8 citation statements)

References 37 publications

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“…For our system, the linear current–voltage ( I – V ) curves confirmed the ohmic behavior of these samples. , For a single fiber connecting the gold contacts, electrical conductivity (σ) was obtained by using the following eq single−fiber 0.25em conductivity , 0.25em σ = 1 ρ = I V × L A = I V π ( R 2 L ) where A , I , V , L , and R are the fiber cross-sectional area, current, voltage, length, and radius of fiber, respectively. As discussed above, all fibers were considered cylindrical (Figure S8).…”

Section: Resultssupporting

confidence: 64%

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Effects of Poly(3-hexylthiophene) Molecular Weight and the Aging of Spinning Solution on the Electrospun Fiber Properties

Ahmad

Song

Liu

et al. 2022

ACS Appl. Polym. Mater.

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The electrospinning technique is an attractive route for processing conjugated polymers in a significant quantity for large-scale applications. However, the processing–structure–property relationship of the electrospinning process for conjugated polymers is not well understood. Here, we report the electrospinning of poly(3-hexylthiophene) (P3HT) for three different molecular weights of P3HT: 31, 58, and 83 kDa. Chloroform was used as a solvent, and a high molecular weight poly(ethylene oxide) (PEO) was utilized to facilitate the processing of P3HT. Electrospinning was performed on the freshly prepared and 24 h aged spinning solutions. The aging of the spinning solution led to the self-assembly of P3HT chains, particularly with dominant H-aggregation for 83 kDa P3HT. The structure development and properties of the fibers were investigated, including the single-fiber electrical conductivity measured using a custom-built setup. Electrical conductivity has been found to increase with increasing molecular weight, and as high as a fivefold enhancement in single-fiber electrical conductivity was obtained for the fibers from the aged solution compared to the fiber from the freshly prepared solution. Despite a 25% PEO concentration in the fibers, the maximum electrical conductivity of a single fiber was found to be ≈2.7 × 10–5 S/cm, similar to the pristine P3HT thin films. Our study provides an additional understanding of P3HT structure development in electrospun fibers as a function of polymer molecular weight and processing steps and relates that to fiber properties.

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Section: Resultssupporting

confidence: 64%

“…For our system, the linear current−voltage (I−V) curves confirmed the ohmic behavior of these samples. 22,72 For a single fiber connecting the gold contacts, electrical conductivity (σ) was obtained by using the following eq 1 ( )…”

Section: Acsmentioning

confidence: 99%

Effects of Poly(3-hexylthiophene) Molecular Weight and the Aging of Spinning Solution on the Electrospun Fiber Properties

Ahmad

Song

Liu

et al. 2022

ACS Appl. Polym. Mater.

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“…The obtained electrical conductivity of the two types of multi-walled carbon nanotubes and graphite was 2.21 × 10 3 ± 46.25, 1.50 × 10 3 ± 13.46 and 1.69 × 10 4 ± 240.19 S cm −1 , consistent with the reported values from previous work. [27][28][29] It may be noted that the electrical conductivity of the synthesized PEDOT:PSS powder is in the same range as that of graphite but one order of magnitude greater than that of multi-walled carbon nanotubes.…”

Section: Characterizationmentioning

confidence: 94%

Tuning of PEDOT:PSS synthesis via multiple doping for enhanced electrical conductivity

Sakunpongpitiporn

Phasuksom

Sirivat

2021

Polymer International

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The poly (3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) synthesis conditions were refined to obtain extremely high electrical conductivity. PEDOT:PSS was synthesized by chemical oxidative polymerization under the effects of acid types and concentrations, EDOT:PSS weight ratio, and surfactant types and concentrations. The PEDOT:PSS synthesized with EDOT:PSS weight ratio of 0.5:5.5 in 0.1 mol L −1 HClO 4 provided the highest electrical conductivity of 1.04 × 10 4 ± 188 S cm −1 , not previously reported. The enhanced electrical conductivity can be attributed to the combinatorial primary doping by selective ions (ClO 4 − , PSS − , SO 4 2−) generating a suitable PEDOT:PSS structure with high carrier number and electron mobility, as consistently verified using Fourier transform infrared spectroscopy, UV-visible spectrometry, X-ray photoelectron spectrometry and thermogravimetric analysis. The refined synthesis opens a new route for PEDOT:PSS nanoparticles to be used in various electronic applications which require the starting nontoxic organic material to be highly conductive.

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“…Researchers made composite materials from this simple method, producing conductive nanofibers. Recently, Lee et al [15] presented a highly-conductive electrospun polyethylene oxide (PEO) nanowire carbon nanotube (CNT) composite, using poly(styrene sulfonic acid graft aniline) (PSS-g-ANI) as an amphiphilic surfactant to create a stable solution of the CNT and the polymer. High electrical conductivity (1570 S/m) was reported, comparing well to the intrinsic conductivity of conductive polymers varying from 10 −14 –10 2 S/cm [16].…”

Section: Randomly-aligned Nanowiresmentioning

confidence: 99%

Polymeric Nanowires for Diagnostic Applications

2019

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Polymer nanowire-related research has shown considerable progress over the last decade. The wide variety of materials and the multitude of well-established chemical modifications have made polymer nanowires interesting as a functional part of a diagnostic biosensing device. This review provides an overview of relevant publications addressing the needs for a nanowire-based sensor for biomolecules. Working our way towards the detection methods itself, we review different nanowire fabrication methods and materials. Especially for an electrical signal read-out, the nanowire should persist in a single-wire configuration with well-defined positioning. Thus, the possibility of the alignment of nanowires is discussed. While some fabrication methods immanently yield an aligned single wire, other methods result in disordered structures and have to be manipulated into the desired configuration.

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Improved electrical conductivity of poly(ethylene oxide) nanofibers using multi-walled carbon nanotubes

Cited by 11 publications

References 37 publications

Effects of Poly(3-hexylthiophene) Molecular Weight and the Aging of Spinning Solution on the Electrospun Fiber Properties

Effects of Poly(3-hexylthiophene) Molecular Weight and the Aging of Spinning Solution on the Electrospun Fiber Properties

Tuning of PEDOT:PSS synthesis via multiple doping for enhanced electrical conductivity

Polymeric Nanowires for Diagnostic Applications

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