Electric response of isolated electrospun polyaniline nanofibers to vapors of aliphatic alcohols

Pinto, Nicholas J.; Ramos, Idalia; Rojas, Richard; Wang, Pen-Cheng; Johnson, A. T. Charlie

doi:10.1016/j.snb.2007.09.040

Cited by 91 publications

(36 citation statements)

References 28 publications

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“…Controlling the conductivity of the PANI salt by acid protonation has its advantages when electrospinning the composite PANI/PEO solution. However, the net interaction between the bulky anion from HCSA and NH 3 gas molecules donating electrons to the imine nitrogen results in the reduction in the hole charge carrier concentration of doped PANI; thus, yielding the observed increase in resistance [41]. The calibration curves (Figure 6b) show that the sensitivity (DR/R o ) increases as the NH 3 concentration increases, because the fiber mat absorbs more NH 3 molecules over the same area.…”

Section: Device Performancementioning

confidence: 99%

Electrospun Polyaniline/Poly(ethylene oxide) Composite Nanofibers Based Gas Sensor

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Bosze

et al. 2014

Electroanalysis

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Camphor‐10‐sulfonic acid (HCSA) doped polyaniline (PANI)/poly(ethylene oxide) (PEO) composite nanofibers with different compositions (12 to 52 wt.% of PANI) were synthesized by an electrospinning method and their properties including optical, electrical and sensing were systematically investigated. FT‐IR shows that an increase of IR absorbance ratios of aromatic CC stretching vibration of benzenoid rings of PANI to COC symmetric vibrational modes of PEO confirmed that the PANI content in nanofiber mats increased proportionally with increase in PANI content in electrospinning solution. The band gap of PANI was determined to be 2.5 eV using UV‐Vis spectroscopy. The electrical conductivities of the nanofibers increased with an increase in the PANI content in the nanofibers. Additionally, the sensitivity toward NH3 increased as the PANI content increased, but branched nanofibers reduced sensing response. The humidity sensitivity changed from positive to negative as the PANI content increased. The electron transport mechanism was studied by measuring the temperature dependence electrical resistivity. The negative temperature coefficient of resistance revealed a semiconducting behavior for the PANI/PEO nanofibers. The activation energy, calculated by Arrhenius plot, increased as the PANI content decreased. The power law indicated that electrons were being transported in a three dimensional matrix, and the longer hopping distance required more hopping energy for electron transport.

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Section: Device Performancementioning

confidence: 99%

Electrospun Polyaniline/Poly(ethylene oxide) Composite Nanofibers Based Gas Sensor

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Bosze

et al. 2014

Electroanalysis

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“…Pinto and coworkers prepared electrospun nanowires of PANI with tunable conductivity and used them in the fabrication of gas sensors [100,101]. Because of the large surface-to-volume ratio and the small amount of active material used, these sensors were faster and more reliable than conventional sensors based on thin films.…”

Section: Sensorsmentioning

confidence: 99%

Nanostructured Conductive Polymers by Electrospinning

Chronakis

2010

Nanostructured Conductive Polymers

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“…It must be stressed that, as a result, there is little inherent control over the deposition localization, which is essentially random. Conductimetric chemical sensors based on conducting-polymer fibers of poly(o-toluidine) [19] and PANI [20], both of which were doped with camphorsulfonic acid (CSA) have been fabricated for the detection of alcohol vapors. Both groups showed similar resistance response ratios for exposure to ethanol vapor of 0.…”

Section: Nanofibers and Nanocablesmentioning

confidence: 99%

Nanostructured Conducting Polymers for (Electro)chemical Sensors

Killard

2010

Nanostructured Conductive Polymers

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Conducting polymers have been investigated for many years now for their electrical and electrochemical properties. The moderate range of conducting polymers now available, their many derivatives, broad range of counter-ion doping options, level of proton doping, and the many synthetic routes result in a large range of material properties in terms of conductivity, chemical sensitivity, selectivity, and redox characteristics. This allows them to participate in many chemical interactions which are suitable for chemosensing applications.Nanotechnology allows conducting-polymer materials to be studied and applied to chemical sensing in a new way. Controlling the structure and morphology of conducting polymer materials at nanoscales brings the prospect of a range of enhancements not possible with traditional bulk materials. Traditional routes to polymer formation, such as chemical and electrochemical synthesis, lack any fine control on the tertiary structure of the growing polymer, and this lack of structural reproducibility has negative consequences for the performance of the material as a sensor interface. In addition, such polymerizations, Nanostructured Conductive PolymersEdited by Ali Eftekhari

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Electric response of isolated electrospun polyaniline nanofibers to vapors of aliphatic alcohols

Cited by 91 publications

References 28 publications

Electrospun Polyaniline/Poly(ethylene oxide) Composite Nanofibers Based Gas Sensor

Electrospun Polyaniline/Poly(ethylene oxide) Composite Nanofibers Based Gas Sensor

Nanostructured Conductive Polymers by Electrospinning

Nanostructured Conducting Polymers for (Electro)chemical Sensors

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