New Method for Fabrication of CSA Doped PANi- ${\rm TiO}_{2}$ Thin-Film Ammonia Sensor

Pawar, S. G.; Patil, S. L.; Chougule, M. A.; Raut, B. T.; Godase, P. R.; Mulik, R. N.; Sen, Shashwati; Patil, V. B.

doi:10.1109/jsen.2011.2152391

Cited by 48 publications

(15 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Among all the conducting polymers, due to high electrical conductivity, charge transport mechanism, environmental stability and low synthesis cost, polyaniline (PANI) stands as the most potential conducting polymer. It finds application in bio sensors namely cholesterol sensor [1], glucose sensor [2], gas sensors [3,4] and in other fields such as electromagnetic shielding [5], light emitting devices [6,7], photovoltaic applications [8][9][10][11], light weight batteries [12], organic displays [13] etc. PANI can be tuned to either conducting or insulating nature by doping or dedoping procedure respectively, through reversible chemical, electrochemical process.…”

Section: Introductionmentioning

confidence: 99%

Measurement on the structural, morphological, electrical and optical properties of PANI-CSA nanofilms

Geethalakshmi

Muthukumarasamy²,

Balasundaraprabhu

2016

Measurement

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Measurement on the structural, morphological, electrical and optical properties of PANI-CSA nanofilms

Geethalakshmi

Muthukumarasamy²,

Balasundaraprabhu

2016

Measurement

View full text Add to dashboard Cite

“…The intrinsic redox and acid/base reactions it can undergo result in different electrical properties that vary easily with doping, making it suitable for gas sensing applications [ 6 , 11 , 16 , 17 , 18 , 19 ]. PANI can be doped with several acids and these dopants influence the conductivity by changing the electrical, chemical, and structural nature of polymer resulting in active gas sensing sites [ 20 , 21 ]. Potential dopants for PANI include camphor sulfonic acid, p -toluene sulfonic acid, hydrochloric acid, sulfuric acid, tanninsulfonic acid, ligninsulfonic acid, etc.…”

Section: Introductionmentioning

confidence: 99%

Ammonia Gas Sensing Behavior of Tanninsulfonic Acid Doped Polyaniline-TiO2 Composite

Bairi

Bourdo

Sacré

et al. 2015

Sensors

View full text Add to dashboard Cite

A highly active tannin doped polyaniline-TiO2 composite ammonia gas sensor was developed and the mechanism behind the gas sensing activity was reported for the first time. A tanninsulfonic acid doped polyaniline (TANIPANI)-titanium dioxide nanocomposite was synthesized by an in situ polymerization of aniline in the presence of tanninsulfonic acid and titanium dioxide nanoparticles. X-ray diffraction and thermogravimetric analysis were utilized to determine the incorporation of TiO2 in TANIPANI matrix. UV-Visible and infrared spectroscopy studies provided information about the electronic interactions among tannin, polyaniline, and TiO2. Scanning electron microscopy (SEM) along with energy dispersive X-ray spectroscopy (EDS) and atomic force microscopy (AFM) surface analysis techniques were used to investigate the metal oxide dispersions inside polyaniline matrix. Gas sensors were prepared by spin coating solutions of TANIPANI-TiO2 and TANIPANI composites onto glass slides. Sensors were tested at three different concentrations (20 ppm, 40 ppm, and 60 ppm) of ammonia gas at ambient temperature conditions by measuring the changes in surface resistivity of the films with respect to time. Ammonia gas sensing plots are presented showing the response values, response times and recovery times. The TANIPANI-TiO2 composite exhibited better response and shorter recovery times when compared to TANIPANI control and other polyaniline composites that have been reported in the literature. For the first time a proposed mechanism of gas sensing basing on the polaron band localization and its effects on the gas sensing behavior of polyaniline are reported.

show abstract

“…Among all the conducting polymers, polyaniline (PANI) stand as the most potential conducting polymer due to its high electrical conductivity, charge transport mechanism, environmental stability and low synthesis cost. It finds application in bio sensors such as cholesterol sensor [1], glucose sensor [2], and gas sensors [3,4], electromagnetic shielding [5], light emitting devices [6,7], photovoltaic applications [8][9][10][11], light weight batteries [12], organic displays [13] etc. PANI demands several essential conditions for its high yield.…”

Section: Introductionmentioning

confidence: 99%

CSA-doped PANI semiconductor nanofilms: synthesis and characterization

Geethalakshmi

Muthukumarasamy²,

Balasundaraprabhu³

2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

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.

show abstract

New Method for Fabrication of CSA Doped PANi- ${\rm TiO}_{2}$ Thin-Film Ammonia Sensor

Cited by 48 publications

References 27 publications

Measurement on the structural, morphological, electrical and optical properties of PANI-CSA nanofilms

Measurement on the structural, morphological, electrical and optical properties of PANI-CSA nanofilms

Ammonia Gas Sensing Behavior of Tanninsulfonic Acid Doped Polyaniline-TiO2 Composite

CSA-doped PANI semiconductor nanofilms: synthesis and characterization

Contact Info

Product

Resources

About