Chemiresistor gas sensor based on sulfonated dye-doped modified conducting polypyrrole film for high sensitive detection of 2,4,6-trinitrotoluene in air

Ghoorchian, Arash; Alizadeh, Naader

doi:10.1016/j.snb.2017.08.093

Cited by 43 publications

(22 citation statements)

References 60 publications

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“…The mechanism of interaction between the analytes and the sensing material defines the level of material properties changes. This can vary depending on the employed materials, e.g., highly sensitive nano-structured dye-doped polypyrrole (PPy) electrosynthesis has been fabricated on gold interdigitated electrodes (IDE) with a reported detection limit and a dynamic range of 0.2 ppb and 9.7–827 ppb, respectively for 2,4,6-Trinitrotoluene (TNT) detection [17]. The electrodes are commonly designed as an interdigitated structure as shown in Figure 3.…”

Section: Electrochemical Sensorsmentioning

confidence: 99%

“…The electrodes are then deposited and patterned followed by the sensing layer deposition to prevent any damage to the sensing layer during the deposition process. Depending on the chosen sensing layer, it can be deposited using spin coating, spray coating, dip coating, or drop casting techniques [17].…”

Section: Electrochemical Sensorsmentioning

confidence: 99%

“…Polypyrrole sensors for detection of explosive gases: Chemiresistor gas sensor based on sulfonated dye-doped modified conducting polypyrrole (PPy) film has been designed and fabricated for highly sensitive detection of 2,4,6-trinitrotoluene that is one of the most commonly used explosives. The sensor uses electro synthesis of PPy on Au-IDEs in the presence of the sulfonated dyes and exhibits high sensitivity and good selectivity to TNT with no response to other related gases and with a LOD and linear dynamic range of about 0.2 ppb and 10–800 ppb, respectively [17]. …”

Section: Electrochemical Sensorsmentioning

confidence: 99%

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Advanced Micro- and Nano-Gas Sensor Technology: A Review

Nazemi

Joseph

Park

et al. 2019

Sensors

412

243

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Micro- and nano-sensors lie at the heart of critical innovation in fields ranging from medical to environmental sciences. In recent years, there has been a significant improvement in sensor design along with the advances in micro- and nano-fabrication technology and the use of newly designed materials, leading to the development of high-performance gas sensors. Advanced micro- and nano-fabrication technology enables miniaturization of these sensors into micro-sized gas sensor arrays while maintaining the sensing performance. These capabilities facilitate the development of miniaturized integrated gas sensor arrays that enhance both sensor sensitivity and selectivity towards various analytes. In the past, several micro- and nano-gas sensors have been proposed and investigated where each type of sensor exhibits various advantages and limitations in sensing resolution, operating power, response, and recovery time. This paper presents an overview of the recent progress made in a wide range of gas-sensing technology. The sensing functionalizing materials, the advanced micro-machining fabrication methods, as well as their constraints on the sensor design, are discussed. The sensors’ working mechanisms and their structures and configurations are reviewed. Finally, the future development outlook and the potential applications made feasible by each category of the sensors are discussed.

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Section: Electrochemical Sensorsmentioning

confidence: 99%

Section: Electrochemical Sensorsmentioning

confidence: 99%

Section: Electrochemical Sensorsmentioning

confidence: 99%

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Advanced Micro- and Nano-Gas Sensor Technology: A Review

Nazemi

Joseph

Park

et al. 2019

Sensors

412

243

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“…Živi organizmi kroz svoje metaboličke procese transformišu zagađujuća jedinjenja. Biorazgradnja jedinjenja je često rezultat delovanja više organizama [11,12,19,23,28,29,31].…”

Section: Fizički I Biološki Procesi Za Degradaciju Tnt-aunclassified

Impact of TNT explosive and its degradation products on the environment

Trifunović¹,

Antonijević²

2019

Zaštita materijala

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Uticaj TNT eksploziva i njegovih produkata degradacije na životnu sredinu IZVOD Eksploziv je supstanca koja kada je izložena toploti, udaru, trenju ili detonaciji, veoma brzo oslobađa veliku količinu energije. Prilikom naglog oslobađanja energije, dolazi do povećanja temperature i pritiska i čitav eksplozivni materijal se pretvara u vruće kompresovane gasove koji se brzo šire i na taj način iniciraju talas pritiska, tj. "udarni talas". Eksploziv trinitrotoluen (TNT) je vojni eksploziv široke primene, i samim tim najveći unos eksploziva u životnu sredinu dolazi iz vojnih aktivnosti. Municija koja se koristi, kako u vojne, tako i u civilne svrhe, kontaminira sve delove sveta. TNT je slaborazgradiv i može se naći u niskim koncentracijama u zemljištu, površinskim i podzemnim vodama. Nažalost, nije štetan samo TNT, već i njegovi produkti degradacije. Eksplozivna jedinjenja negativno utiču na različite vrste zemljišta, voda, biljaka, životinja, a takođe i na čoveka. Stepen uticaja kontaminacije eksplozivom nije isti na sva živa bića. Sanacija zagađenih područja može se vršiti različitim fizičkim, hemijskim i biološkim metodama. Ključne reči: TNT eksploziv, uticaj TNT-a, produkti degradacije TNT-a, životna sredina.

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“…[11][12][13] Polymers with conjugated chains are frequently used because of their low oxidation potential, electronic and ionic conductivity and porous morphology. 14,15 Due to these advantages, a scheme was proposed using polymers as carriers to deposit metal nanoparticles in order to fabricate polymer/metal nanocomposite-modied electrodes. These modied electrodes can enhance the stability of the combination of the nanometre-sized material and electrode base, lessen the tendency for the particles to reunify and improve the catalytic properties of the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%