Electrochemical synthesis of polyaniline nanowires on Pt interdigitated microelectrode for room temperature NH3 gas sensor application

Tuấn, Chu Văn; Tuan, Mai Anh; Hieu, Nguyen Van; Trung, Tran

doi:10.1016/j.cap.2011.12.006

Cited by 62 publications

(18 citation statements)

References 19 publications

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“…Besides, transfer of CP nanowires from the production cell to the microelectrode and the contact resistance between the nanowires and the metal pads are still important issues. Template‐free electropolymerization of nanowire networks of CPs for chemiresistors was recently reported on untreated silicon oxide utilizing galvanostatic electrodeposition 12, 13 and cyclic voltammetry 14 and silanized silicon oxide galvanostatically 15. While these methods help alleviate some of the problems identified above, they still suffer from low device yields and incompatibility in solution.…”

Section: Introductionmentioning

confidence: 99%

Nanothin Polyaniline Film for Highly Sensitive Chemiresistive Gas Sensing

2013

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This study developed a facile technique for site-specific synthesis of nanometer-thick polyaniline (PANI) film for fabrication of field-effect transistor/chemiresistor sensors. The nanothin film had a thickness of 9-20 nm and was of carpet-like morphology offering a highly accessible surface geometry that enhanced gas adsorption and promoted surface reaction/interaction. When applied for sensing of ammonia (NH 3 ) and nitrogen dioxide (NO 2 ), the performance of the nanothin film device was comparable to that of a 1-dimensional (1-D) nanostructure, with a great advantage in ease of processing. Sensing mechanism study indicated electrostatic gating as the dominating mode of sensing.

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Section: Introductionmentioning

confidence: 99%

Nanothin Polyaniline Film for Highly Sensitive Chemiresistive Gas Sensing

2013

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“…Among these conducting polymers, polyaniline nanomaterials are the most extensively studied because of their greater surface area that allows fast diffusion of gas molecules into the structure [2], and they have been successfully demonstrated as efficient gas sensors for monitoring airborne organic and inorganic components such as alcohol vapor [3,4], methanol [5], hydrogen [6,7], aromatic organic compounds (AOCs) [8], chloroform vapor [9,10], NO 2 [11], and especially ammonia [12–18]. Three major kinds of PANI-based ammonia sensing composite materials are described in the literature, including PANI-polymer composite [19,20], PANI-CNTs (or PANI-MWCNTs) composite [21,22] and PANI-metal dioxide composites (such as PANI-SnO 2 [23], PANI-In 2 O 3 [23], PANI-ZnO [24] and PANI-TiO 2 [25,26]).…”

Section: Introductionmentioning

confidence: 99%

Ammonia Sensing Behaviors of TiO2-PANI/PA6 Composite Nanofibers

Wang

Dong

Pang

et al. 2012

Sensors

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Titanium dioxide-polyaniline/polyamide 6 (TiO2-PANI/PA6) composite nanofibers were prepared by in situ polymerization of aniline in the presence of PA6 nanofibers and a sputtering-deposition process with a high purity titanium sputtering target. TiO2-PANI/PA6 composite nanofibers and PANI/PA6 composite nanofibers were fabricated for ammonia gas sensing. The ammonia sensing behaviors of the sensors were examined at room temperature. All the results indicated that the ammonia sensing property of TiO2-PANI/PA6 composite nanofibers was superior to that of PANI/PA6 composite nanofibers. TiO2-PANI/PA6 composite nanofibers had good selectivity to ammonia. It was also found that the content of TiO2 had a great influence on both the morphology and the sensing property of TiO2-PANI/PA6 composite nanofibers.

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“…For example Tuan et al developed a facile and effective electrochemical route for directly growing polyaniline nanowires on platinum interdigitated microelectrodes [35]. The gas sensing properties of the so-prepared nanowires, whose diameters varied from 50 to 200 nm, and lengths up to hundreds of micrometers, were explored and the results obtained demonstrated that PANI nanowires have good potential as novel ammonia sensors.…”

Section: Gas Sensors Based On Conducting Polymer Nanowiresmentioning

confidence: 99%

“…Consequently, electron transfers between polymers and gas analytes alter the doping level of polymers and cause the changes in resistance of the sensing material (Table 3). This process occurs for example when PPy or PANI films are exposed to NH3, NO2, or other redox-active gases [23,[31][32][33][34][35]49,50]. Electron acceptors, such as NO2, can remove electrons from the aromatic rings of conducting polymers.…”

Section: Response Mechanismmentioning

confidence: 99%

Gas Sensors Based on Electrodeposited Polymers

Lakard

Carquigny

Segut

et al. 2015

Metals

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Electrochemically deposited polymers, also called "synthetic metals", have emerged as potential candidates for chemical sensing due to their interesting and tunable chemical, electrical, and structural properties. In particular, most of these polymers (including polypyrrole, polyaniline, polythiophene) and their derivatives can be used as the sensitive layer of conductimetric gas sensors because of their conducting properties. An important advantage of polymer-based gas sensors is their efficiency at room temperature. This characteristic is interesting since most of the commercially-available sensors, usually based on metal oxides, work at high temperatures (300-400 °C). Consequently, polymer-based gas sensors are playing a growing role in the improvement of public health and environment control because they can lead to gas sensors operating with rapid detection, high sensitivity, small size, and specificity in atmospheric conditions. In this review, the recent advances in electrodeposited polymer-based gas sensors are summarized and discussed. It is shown that the sensing characteristics of electrodeposited polymers can be improved by chemical functionalization, nanostructuration, or mixing with other functional materials to form composites or hybrid materials. OPEN ACCESSMetals 2015, 5 1372

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Electrochemical synthesis of polyaniline nanowires on Pt interdigitated microelectrode for room temperature NH3 gas sensor application

Cited by 62 publications

References 19 publications

Nanothin Polyaniline Film for Highly Sensitive Chemiresistive Gas Sensing

Nanothin Polyaniline Film for Highly Sensitive Chemiresistive Gas Sensing

Ammonia Sensing Behaviors of TiO2-PANI/PA6 Composite Nanofibers

Gas Sensors Based on Electrodeposited Polymers

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