Selective NH3 gas sensor based on Langmuir-Blodgett polypyrrole film

Penza, M.; Milella, E.; Alba, M.; Quirini, A.; Vasanelli, L.

doi:10.1016/s0925-4005(97)80263-8

Cited by 63 publications

(28 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The complete reversibility can not been obtained in our case even though longer recovery time is used. Similar phenomena have been observed for most PPy-based NH 3 sensors [13,14,16,17,19,31]. Mechanism of NH 3 sensing irreversibility is not yet clearly established, but there are various explanations such as an irreversible electron transfer from ammonia to the doped PPy matrix [16], function of the dopants on the film morphologies [13], or the detachment of the dopant molecules under pumping [29].…”

Section: Incomplete Reversibility Of Ppy-coated Tio 2 /Znosupporting

confidence: 65%

“…For low NH 3 concentration (500 ppb to 4.6 ppm), the sensitivity was as high as 1.49% per ppm of ammonia with correlation coefficient R ¼ 0.9308, while in the range from 50 ppm to 450 ppm, the slope decreased to 0.039% per ppm of ammonia (correlation coefficient R ¼ 0.9987). Such behavior could be attributed to a partial saturation of PPy at higher NH 3 concentrations [19]. The detection limit was estimated to be 60 ppb at a signal-to-ratio of 3, which is significantly lower than the recommended threshold limit value of 25 ppm for human exposure.…”

mentioning

confidence: 82%

See 1 more Smart Citation

Ammonia Gas Sensor Using Polypyrrole‐Coated TiO₂/ZnO Nanofibers

Wang¹,

Jia²,

Strout³

et al. 2009

Electroanalysis

153

View full text Add to dashboard Cite

Highly porous polypyrrole (PPy)-coated TiO 2 /ZnO nanofibrous mat has been successfully synthesized. The core TiO 2 / ZnO nanofibers have an average diameter of ca. 100 nm and the shell of ultrathin PPy layer has a thickness of ca. 7 nm. The NH 3 gas sensor using the as-prepared material exhibited a fast response over a wide dynamic range and high sensitivity with a detection limit of 60 ppb (S/N ¼ 3). Compared to conventional pristine PPy film, the improved performance in NH 3 detection can be attributed to the free access of NH 3 to PPy and a minimized gas diffusion resistance through the ultrathin PPy layer.

show abstract

Section: Incomplete Reversibility Of Ppy-coated Tio 2 /Znosupporting

confidence: 65%

mentioning

confidence: 82%

Ammonia Gas Sensor Using Polypyrrole‐Coated TiO₂/ZnO Nanofibers

Wang¹,

Jia²,

Strout³

et al. 2009

Electroanalysis

153

View full text Add to dashboard Cite

show abstract

“…This interfering influence has been reduced by using dodecylsulfate ions, which inhibit ion exchange [117]. The sensitivity of Langmuir -Blodgett polypyrrole layer has been found higher (in the range 0.01 -1%) than for polypyrrole obtained by electropolymerization [120].…”

Section: Interactions With Ammoniamentioning

confidence: 98%

Chemical Reactivity of Polypyrrole and Its Relevance to Polypyrrole Based Electrochemical Sensors

Maksymiuk

2006

Electroanalysis

139

View full text Add to dashboard Cite

One of the most frequently used conducting polymers, polypyrrole, can take part in chemical processes with typical components of ambient media: oxygen, acids, bases, redox reactants, water, and organic vapors; it can also incorporate nonreactive ions and surfactants from solutions. The influence of such processes on changes of the polymer structure, composition and on possible degradation is analyzed. The benefits and disadvantages of such processes for analytical characteristic of polypyrrole based electrochemical sensors are considered. This discussion is focused on potentiometric ion sensors, where polypyrrole is either a receptor membrane or an ion-to-electron transducer placed between a solid state electrode support and a typical ion-selective membrane.

show abstract

“…[147] Films of conventional polypyrrole are typically grown electrochemically or through a polymer lift-off procedure. [148][149][150][151] However, because polypyrrole nanofibers are more easily processable in water than their bulk counterparts, films of this material can be formed through drop-casting. Polypyrrole nanofibers have been used as a material for the reversible detection of ammonia and hydrogen gas with high sensitivity and quick response times.…”

Section: Chemical Sensorsmentioning

confidence: 99%

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

2009

View full text Add to dashboard Cite

This Progress Report provides a brief overview of current research activities in the field of one‐dimensional (1D) conducting polymer nanostructures. The synthesis, properties, and applications of these materials are outlined with a strong emphasis on recent literature examples. Chemical methods that can produce 1D nanostructures in bulk quantities are discussed in the context of two different strategies: 1) procedures that rely on a nanoscale template or additive not inherent to the polymer and 2) those that do not. The different sub‐classifications of these two strategies are delineated and the virtues and vices of each area are discussed. Following this discussion is an outline of the properties and applications of 1D conducting polymer nanostructures. This section focuses on applications in which nanostructured conducting polymers are clearly advantageous over their conventional counterparts. We conclude with our perspective on the main challenges and future research directions for this new class of nanomaterials. This Progress Report is not intended as a comprehensive review of the field, but rather a summary of select contributions that we feel will provide the reader with a strong basis for further investigation into this fast emerging field.

show abstract

Selective NH3 gas sensor based on Langmuir-Blodgett polypyrrole film

Cited by 63 publications

References 11 publications

Ammonia Gas Sensor Using Polypyrrole‐Coated TiO₂/ZnO Nanofibers

Ammonia Gas Sensor Using Polypyrrole‐Coated TiO₂/ZnO Nanofibers

Chemical Reactivity of Polypyrrole and Its Relevance to Polypyrrole Based Electrochemical Sensors

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

Contact Info

Product

Resources

About

Selective NH3 gas sensor based on Langmuir-Blodgett polypyrrole film

Cited by 63 publications

References 11 publications

Ammonia Gas Sensor Using Polypyrrole‐Coated TiO2/ZnO Nanofibers

Ammonia Gas Sensor Using Polypyrrole‐Coated TiO2/ZnO Nanofibers

Chemical Reactivity of Polypyrrole and Its Relevance to Polypyrrole Based Electrochemical Sensors

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

Contact Info

Product

Resources

About

Ammonia Gas Sensor Using Polypyrrole‐Coated TiO₂/ZnO Nanofibers

Ammonia Gas Sensor Using Polypyrrole‐Coated TiO₂/ZnO Nanofibers