Polyaniline nanofilms as a sensing device for ionizing radiation

Laranjeira, Jane Maria Goncalves; Khoury, Helen J.; Azevêdo, W.M. de; Vasconcelos, Elder A. de; Silva, E.F da

doi:10.1016/s1386-9477(02)00925-6

Cited by 9 publications

(6 citation statements)

References 3 publications

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“…The films were irradiated by 60 Co gamma cell (dose rate of 0.2 Gy/min), with doses from 0 to 8 kGy. Formation of polyemeraldine base was characterized using UV-visible spectrophotometry [5].…”

Section: Introductionmentioning

confidence: 99%

Absorbance and Conductivity of Aniline Hydrochloride/ Polyvinyl Alcohol Films (An/Pva) for Gamma Radiation Dosimetry in the Range 0 – 10 Kgy

Omar

Baraka

Zaki

et al. 2012

The International Conference on Chemical and Environmental Engi

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The changes of optical and electrical properties of aniline hydrochloride/polyvinyl alcohol films (AN/PVA) influenced by gamma radiation for the purpose of gamma dosimetry are presented in this work. Optically, by exposing films to doses of gamma radiation from 0 to 10 kGy, films showed visually apparent gradual change in color from violet to yellow green with increase of absorbance at 424 nm. Electrical, conductivity also was increased regularly in the same dose range. It can be suggested that aniline hydrochloride in the AN/PVA form may be used for dosimetry for the mentioned dose range.

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Section: Introductionmentioning

confidence: 99%

Absorbance and Conductivity of Aniline Hydrochloride/ Polyvinyl Alcohol Films (An/Pva) for Gamma Radiation Dosimetry in the Range 0 – 10 Kgy

Omar

Baraka

Zaki

et al. 2012

The International Conference on Chemical and Environmental Engi

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“…Recently we report the development and application of high quality heterojunctions consisting of silicon and the conducting polymer polyaniline. Those devices proved to be excellent for the detection of chemical gases as well as ionizing radiation detection [12]. Since polyaniline presented optical response in the UV regions, in this paper we decided to investigate the heterojunction response as a UV detector.…”

Section: Introductionmentioning

confidence: 99%

A conducting polymer–silicon heterojunction as a new ultraviolet photodetector

Cardenas

Vasconcelos

Azevêdo

et al. 2008

Applied Surface Science

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“…its relatively good environmental stability, the optimum conductivity and the ease of preparation [3,[8][9][10]. The behavior of electro-active polymers has been considered from the point of view of sensors [11][12][13][14][15][16], field-effect transistor applications [17,18], and Schottky diodes [19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of the current–voltage characteristics of Sn/PANI/p-Si/Al heterojunctions

Kaya

Çetin

Boyarbay

et al. 2007

J. Phys.: Condens. Matter

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Sn/PANI/p-Si/Al heterojunctions were fabricated by electropolymerization of aniline on chemically cleaned p-Si substrates. Current-voltage characteristics of Sn/PANI/p-Si/Al heterojunctions measured in the temperature range 140-280 K are presented and analyzed. Although these devices were clearly rectifying, their I-V characteristics were non-ideal, which can be judged from the nonlinearity in the semi-logarithmic plots. The high values of the ideality factor n depending on the sample temperature may be ascribed to a decrease of the exponentially increasing rate in current due to space-charge injection into the PANI thin film at higher forward bias voltages. Careful analysis of the forward bias I-V characteristics on a log-log scale indicates that the space-charge-limited current (SCLC) conduction controlled by an exponential trap distribution above the valence band edge dominates the current transport in the PANI/p-Si diodes at high voltages. Furthermore, the PANI was characterized by using Fourier transform infrared (FTIR) and ultraviolet-visible (UV-vis) spectra.

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Polyaniline nanofilms as a sensing device for ionizing radiation

Cited by 9 publications

References 3 publications

Absorbance and Conductivity of Aniline Hydrochloride/ Polyvinyl Alcohol Films (An/Pva) for Gamma Radiation Dosimetry in the Range 0 – 10 Kgy

Absorbance and Conductivity of Aniline Hydrochloride/ Polyvinyl Alcohol Films (An/Pva) for Gamma Radiation Dosimetry in the Range 0 – 10 Kgy

A conducting polymer–silicon heterojunction as a new ultraviolet photodetector

Temperature dependence of the current–voltage characteristics of Sn/PANI/p-Si/Al heterojunctions

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