Effect of dopant concentration on the properties of HCl-doped PANI thin films prepared at different temperatures

Geethalakshmi, D.; Muthukumarasamy, N.; Balasundaraprabhu, R.

doi:10.1016/j.ijleo.2013.08.014

Cited by 69 publications

(51 citation statements)

References 22 publications

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“…This peak is characteristic of the degree of p-conjugation in PANI as reported earlier [27][28][29]. The XRD pattern reported in our earlier work [18] of HCl-doped PANI film is not as broad as of PANI-CSA nanofilm, due to its low degree of amorphous nature with nanofiber formation. Figure 3a shows the scanning electron microscope image of PANI-CSA films with PANI:CSA weight ratios of (1:0.5), (1:1) and (1:2).…”

Section: Resultssupporting

confidence: 75%

“…Thickness of PANI-CSA films prepared with different PANI:CSA weight ratios (1:0, 1:0.5, 1:1 and 1:2) were found to be in the range of 54-88 nm forming nanofilms ( Table 1). Doping of PANI with CSA and increase in CSA ratio enhances the thickness of the film, which may be due to the fact that the increase of CSA dopant enhances the degree of polymerization which in turn increases the molecular weight of PANI polymer similar to HCl-doped PANI as reported by us in our earlier work [18]. The sticking efficiency of PANI-CSA film to the glass substrate is high compared to PANIHCl films and this may be due to the organic solvent (mcresol) and organic dopant (CSA).…”

Section: Resultssupporting

confidence: 66%

“…due to its higher carrier mobility and stability [17]. HCl-doped PANI semiconductor thin films prepared and characterized by us in our earlier work [18] though highly conductive, shows rapid decrease in conductivity with time and turn into pure insulator after a month of film preparation, due to the fast escape of Cl -ions. Also, the sticking efficiency of these films to the glass substrate too is very weak which may be due to inorganic HCl acid, which is playing the role of both dopant (Cl -) and solvent.…”

Section: Introductionmentioning

confidence: 93%

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CSA-doped PANI semiconductor nanofilms: synthesis and characterization

Geethalakshmi

Muthukumarasamy²,

Balasundaraprabhu³

2015

J Mater Sci: Mater Electron

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Camphorsulfonic acid doped polyaniline (PANI-CSA) prepared by chemical oxidative polymerization is dip coated on glass plates with three different PANI:CSA weight ratios (1:0.5, 1:1 and 1:2). Films of thickness being \100 nm are termed as nanofilms. Fourier transform infrared spectroscopy indicated the presence of dopant and increase in degree of polymerization with increase in dopant level. X-ray diffraction studies revealed the amorphous nature of the films. Scanning electron microscopy showed very smooth morphology without any crack or pores. Hall-effect analysis showed that the increase in CSA weight ratio appreciably increases the conductivity of PANI-CSA films due to increase in carrier concentration and it also represents the semiconductivity (P-type) nature in all the films. UV-visible absorption spectra and photoluminescence spectra revealed that high intense absorption and emission peaks occur for the PANI-CSA film with PANI:CSA weight ratio (1:2). This appreciable increase is due to increase in charge carriers. Photoluminescence study of PANI-CSA films excited using 300 nm shows high intense peaks at 361 and 494 nm and a weak peak at 410 nm which confirmed the semiconducting nature of the film.

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Section: Resultssupporting

confidence: 75%

Section: Resultssupporting

confidence: 66%

Section: Introductionmentioning

confidence: 93%

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CSA-doped PANI semiconductor nanofilms: synthesis and characterization

Geethalakshmi

Muthukumarasamy²,

Balasundaraprabhu³

2015

J Mater Sci: Mater Electron

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“…The spherical shape of TiO 2 seems fused with a surface of the PANI through adsorption mechanism when the process of synthesis. This process will lead agglomeration on the structure of the PANI ES-TiO 2 [12]. The porosity of PANI-TiO 2 film with mass variations of 0 and 0.08 grams analyzed by ImageJ software analysis, indicates that the porosity of the film was 4.6% and 1.33% respectively.…”

Section: Microstructure Data Analysismentioning

confidence: 99%

“…Thermal stability of the PANI ES become lower caused by chemical reaction of PANI conjugate system with oxygen or loss of dopant as chlorine [14] on a polymer chain that can limit its application. It was reported that the conductivity of the PANI-HCl decreased about 0.4 ± 0.03% S/cm [15] or 0.08% [12] by heating at 145 or 150 o C respectively from 25 S/cm. The decrease in conductivity is presumably caused by the formation of a PANI Emeraldine Base (EB).…”

Section: Introductionmentioning

confidence: 99%

Effect of TiO₂Nanoparticles on Conductivity and Thermal Stability of PANI-TiO₂/Glass Composite Film

Diantoro

Masrul

Taufiq

2018

J. Phys.: Conf. Ser.

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Abstract. Polyaniline (PANI), one of the conductive polymers has been intensively studied. The PANI has practically used in electronic device, and gas sensor. However, the PANI based on the electronic device has weaknesses such as fragile, and unstable of conductivity at high temperature and in an acidic environment. This obstacle can be solved by inducing other better thermal properties materials. One kind of the materials that meet the criteria is TiO 2 . However, TiO 2 has limitation due to the low conductivity compared to the conductivity of PANI. Theoretically, this problem can be solved by reducing the particles size of TiO 2 down to nanometric size. In this study, we prepared a composite film with a various amount of nano TiO 2 to obtain information related the microstructure, electrical conductivity, and their thermal stability. The results of FTIR spectra analysis showed that the PANI-TiO 2 composites films were successfully synthesized which is indicated by the appearance of PANI and TiO 2 characteristic bonds associated with the references. XRD spectra showed the increased crystallinity of PANI-TiO 2 composite films along the addition of TiO 2 . The SEM images presented the decreasing porosity of the samples by increasing the TiO 2 contents. Further, the conductivity of PANI-TiO 2 composite films decreased by increasing the TiO 2 nanoparticles. On the other hands, the thermal stability of the PANI composite films increased by increasing the TiO 2 nanoparticles.

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Enhancement of polyaniline properties by different polymerization temperatures in hydrazine detection

Sambasevam

Mohamad

Phang

2014

J of Applied Polymer Sci

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In this study, a simple and cost effective chemical sensor for hydrazine detection was developed using polyaniline (PAni). PAni was synthesized via chemical oxidative method at different polymerization temperatures (−10, −5, 0, and 25°C) in the presence of sodium dioctyl sulfosuccinate (AOT) as dopant. The effect of polymerization temperature on the performance of the PAni sensor for hydrazine detection was evaluated. The sensor response was analyzed using UV–Vis spectrometer, where there is notable decrease in polaron peak at ∼780 nm after the PAni was exposed to hydrazine. The reduction in the polaron peak is attributed to the decrease in the conductivity of PAni thin films owing to dedoping process by hydrazine. Fourier transform infrared analysis was carried out to study the intensity ratio of quinoid/benzenoid peak to identify the changes in chemical structure of PAni upon exposure to hydrazine. Besides that, all PAni sensors synthesized at different polymerization temperatures showed good reusability up to 10 cycles with respond and recovery time of 0.12 min and 0.08 min, respectively. Data collected in this study indicate that PAni which was synthesized at −5°C could act as sensitive sensor for hydrazine detection with a detection limit of 0.24 ppm. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41746.

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Effect of dopant concentration on the properties of HCl-doped PANI thin films prepared at different temperatures

Cited by 69 publications

References 22 publications

CSA-doped PANI semiconductor nanofilms: synthesis and characterization

CSA-doped PANI semiconductor nanofilms: synthesis and characterization

Effect of TiO₂Nanoparticles on Conductivity and Thermal Stability of PANI-TiO₂/Glass Composite Film

Enhancement of polyaniline properties by different polymerization temperatures in hydrazine detection

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Effect of dopant concentration on the properties of HCl-doped PANI thin films prepared at different temperatures

Cited by 69 publications

References 22 publications

CSA-doped PANI semiconductor nanofilms: synthesis and characterization

CSA-doped PANI semiconductor nanofilms: synthesis and characterization

Effect of TiO2Nanoparticles on Conductivity and Thermal Stability of PANI-TiO2/Glass Composite Film

Enhancement of polyaniline properties by different polymerization temperatures in hydrazine detection

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Product

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Effect of TiO₂Nanoparticles on Conductivity and Thermal Stability of PANI-TiO₂/Glass Composite Film