An optical gas sensor based on polyaniline Langmuir-Blodgett films

Agbor, N.E.; Cresswell, J.; Petty, Michael C.; Monkman, Andrew P.

doi:10.1016/s0925-4005(97)80286-9

Cited by 106 publications

(44 citation statements)

References 13 publications

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“…It is known that the SH groups (contrary to most of other functional groups) interact with gold [35][36]. That is why just SH-containing compounds are used for formation of a binding layer on gold surface.…”

Section: Modification Of Sensor Sensitive Surfacementioning

confidence: 99%

Surface Plasmon Resonance Spectroscopy: Potentialities and Limitations

Chegel

Shirshov

2014

SEMST

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Summary SURFACE PLASMON RESONANCE SPECTROSCOPY: POTENTIALITIES AND LIMITATIONS V. I. Chegel, Yu. M. ShirshovThe review deals with (i) investigation of the physical processes of light interaction with multilayer film structures at the "TIR prism surface-medium under investigation" interface and (ii) development of a novel high-sensitivity optoelectronic sensor spectrometer for registration of biological reactions and real-time quantitative determination of medium dielectric characteristics and geometry. The spectrometer is developed on the basis of surface plasmonpolariton resonance in thin gold and silver films.Keywords: surface plasmon resonance, optoelectronic sensor, biosensor, physical sensor, biomolecule, polarization. Анотація СПЕКТРОСКОПІЯ З ВИКОРИСТАННЯМ ПОВЕРХНЕВОГО ПЛАЗМОННОГО РЕЗОНАНСУ: МОЖЛИВОСТІ ТА ОБМЕЖЕННЯ В. І. Чегель, Ю. М. ШиршовПредставлена оглядова робота присвячена дослідженню фізичних процесів взаємодії світла з багатошаровою плівковою структурою межі поділу: поверхня призми повного внутрішнього відбивання -досліджуване середовище та розробці нового високочутливо-го оптоелектронного сенсорного спектрометра для реєстрації біологічних реакцій та кількісного визначення діелектричних характеристик та геометрії середовища в реально-му режимі часу. В основу розробки було покладене явище поверхневого плазмон-поляри-тонного резонансу в тонких плівках золота та срібла.Ключові слова: поверхневий плазмонний резонанс, оптоелектронний сенсор, біосен-сор, фізичний сенсор, біомолекула, поляризація.

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Section: Modification Of Sensor Sensitive Surfacementioning

confidence: 99%

Surface Plasmon Resonance Spectroscopy: Potentialities and Limitations

Chegel

Shirshov

2014

SEMST

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“…The ability to sense gaseous species without disturbing a specific environment and do so in the absence of electrical contacts and wiring is ideal for systems that concern aging of energetic materials. A current drawback of many current optical sensors, however, is the poor reversibility observed at room temperature (2,4,6,7). On the other hand, for specific applications where continuous NO 2 evolution is of interest these sensor films may be used in a dosimeter capacity and follow the outgassing and buildup of NO 2 .…”

Section: Autonomous Optical Sensor System For the Monitoring Of Nitromentioning

confidence: 99%

Autonomous Optical Sensor System for the Monitoring of Nitrogen Dioxide from Aging Rocket Propellant

Cox¹,

Singh²,

Hunter³

et al. 2001

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An optical sensor system has been developed for the autonomous monitoring of NO 2 evolution in energetic material aging studies. The system is minimally invasive, requiring only the presence of a small sensor film within the aging chamber. The sensor material is a perylene/PMMA film that is excited by a blue LED light source and the fluorescence detected with a CCD spectrometer. Detection of NO 2 gas is done remotely through the glass window of the aging chamber. Irreversible reaction of NO 2 with perylene, producing the non-fluorescent nitroperylene, provides the optical sensing scheme. The rate of fluorescence intensity loss over time can be modeled using a numerical solution to the coupled diffusion and a nonlinear 4 chemical reaction problem to evaluate NO 2 concentration levels. The light source, spectrometer, spectral acquision, and data processing were controlled through a Labview program run by a laptop PC. Due to the long times involved with materials aging studies the system was designed to turn on, warm up, acquire data, power itself off, then recycle at a specific time interval. This allowed the monitoring of aging HE material over the period of several weeks with minimal power consumption and stable LED light output. Despite inherent problems with gas leakage of the aging chamber we were able to test the sensor system in the field under an accelerated aging study of rocket propellant. We found that the propellant evolved NO 2 at a rate that yielded a concentration of between 10 and 100 ppm. The sensor system further revealed that the propellant, over an aging period of 25 days, evolves NO 2 with cyclic behavior between active and dormant periods.5

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“…PANI also has very good environmental stability and good redox reversibility [1,2]. Low cost and wide availability of aniline and its derivatives marked PANI as an ideal candidate in various applications such as electrochimic devices [3,4], light-emitting diodes [5], gas and pH sensing [6][7][8][9], and many others. Thin films from PANI polymer are frequently studied form of PANI on different substrates and with different techniques of preparations [10].…”

Section: Introductionmentioning

confidence: 99%

Formation and Implementation of PANI Thin Film Polymerization

Shukla¹

2018

IJRASET

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Polyaniline (PANI) is one of the most studied and applied conducting polymers because of the unique conduction mechanism and high environmental stability. PANI could be synthetized by chemical or electrochemical methods. For this study PANI thin films deposited on glass substrate were prepared by chemical bath deposition from anilinium sulfate (precursor) using ammonium peroxodisulfate as strong oxidizing agent. Prepared samples were dried in high voltage static electric field (0.6 -2.7 kV/cm). The most important effect was the increase of PANI thin film conductivity. Results showed changes in the microstructure, morphology, and conductivity of PANI thin films in dependence on high voltage electrical field. Optical transmittance was studied by UV-VIS spectroscopy and Raman microspectroscopy was used to study structural changes in PANI chains. Variances in the range 1480-1650 cm-1 was revealed in Raman spectra. The dependence of conductivity on electric field intensity showed the maximum for samples dried in field of intensity 1.0 kV/cm. This conductivity was 374 S/m. Presented results show the possibility to change the structure properties of PANI thin films using high voltage static electrical field.

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An optical gas sensor based on polyaniline Langmuir-Blodgett films

Cited by 106 publications

References 13 publications

Surface Plasmon Resonance Spectroscopy: Potentialities and Limitations

Surface Plasmon Resonance Spectroscopy: Potentialities and Limitations

Autonomous Optical Sensor System for the Monitoring of Nitrogen Dioxide from Aging Rocket Propellant

Formation and Implementation of PANI Thin Film Polymerization

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