Poly(m-aminobenzene sulfonic acid) functionalized single-walled carbon nanotubes based gas sensor

Zhang, Ting; Mubeen, Syed; Bekyarova, Elena; Yoo, Bong Young; Haddon, Robert C.; Myung, Nosang V.; Deshusses, Marc A.

doi:10.1088/0957-4484/18/16/165504

Cited by 122 publications

(92 citation statements)

References 23 publications

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“…PABS-SWNT is a water-soluble nanotube-polymer compound, formed by covalently bonding the polymer (PABS) to SWNTs via amide functionalization [7]. The utilized functionalized PABS-SWNTs are 1.1 nm in diameter and 0.5-1 m in length.…”

Section: Functionalized Cntsmentioning

confidence: 99%

“…By introducing different chemical groups to the nanotube wall, it is possible to change the interaction between nanotubes and the surrounding environment. This reactivity could enhance the sensitivity and selectivity of CNT-based gas sensor devices [19], [20].…”

Section: Functionalized Cntsmentioning

confidence: 99%

“…We have also observed that MWNTs require significantly thicker films than SWNTs of comparable resistance, thereby adding to the sensor cost and complexity. SWNTs can also be coated with a polymer that can enhance the adsorption of ammonia molecules onto the SWNT [7]. For these reasons, we have chosen functionalized SWNTs as the sensing medium, applied as a film of a few micrometers thickness between electrodes fabricated on paper substrate.…”

Section: Introductionmentioning

confidence: 99%

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Carbon-Nanotube Loaded Antenna-Based Ammonia Gas Sensor

Lee

Shaker

Naishadham

et al. 2011

IEEE Trans. Microwave Theory Techn.

112

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Abstract-Carbon nanotubes (CNTs) have been researched extensively for gas-sensing applications due to their unique electrical, chemical, and structural properties. Single-walled carbon nanotubes (SWNTs) have been predominantly used due to their superior electrical conductivity and higher sensitivity relative to multiwalled CNTs. This paper presents the design and characterization of a novel planar sensor fabricated on paper substrate to detect small concentrations of ammonia gas, using the shift in resonance frequency of a patch antenna as the discriminator. We have investigated three main design issues in depth. First, functionalization of the SWNTs with a polymer is studied in order to enhance the gas detection sensitivity. Second, a thin film of the functionalized SWNT is characterized to create a surface impedance model for the explanation and prediction of the resonance shift due to different gas concentrations. Finally, as a proof of concept, functionalized SWNTs are integrated into a patch antenna design and the return loss is measured in a closed-system environment to show high sensitivity for low concentrations of ammonia gas. The proposed antenna-based wireless gas sensor can be utilized in several applications, given its small form factor, light weight, and little to no power requirements.Index Terms-Carbon nanotubes (CNTs), gas sensors, inkjet printing, passive detection, poly(m-aminobenzene sulfonic acid) single-walled carbon nanotube (PABS-SWNT), power scavenging, wireless sensor node.

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Section: Functionalized Cntsmentioning

confidence: 99%

Section: Functionalized Cntsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbon-Nanotube Loaded Antenna-Based Ammonia Gas Sensor

Lee

Shaker

Naishadham

et al. 2011

IEEE Trans. Microwave Theory Techn.

112

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“…SWCNTs covalently attached to poly(m-amino benzene sulfonic acid) (SWCNT-PABS) showed improved sensor performance for the detection of NH 3 at 5 ppm level [12]. Zhang et al [13] have pushed the detection limit further to parts per billion level (100 ppb for NH 3 and 20 ppb for NO 2 ) using similar surface modification (SWCNT-PABS) [14]. Qi et al showed that non-covalent functionalization by drop casting nafion onto SWCNT-FETs resulted in gas sensors not only with improved sensitivity but also with great selectivity for NH 3 [14].…”

Section: Introductionmentioning

confidence: 99%

Trace level ammonia sensing by SWCNTs (network/film) based resistive sensor using a simple approach in sensor development and design

Mishra¹,

Harsh²,

Islam

2013

Int Nano Lett

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Highly stable and sensitive detection of trace level (approximately 1 ppm) of NH 3 gas at room temperature is demonstrated for single wall carbon nanotube (SWCNT)-based resistive sensor. The sensor device was comprised of two planer Au electrodes deposited on carbon nanotubes (CNTs) by thermal evaporation method followed by patterning with photolithography process. For the growth of high-quality SWCNTs, multiple catalysts were deposited by co-sputtering method, and the yielded CNTs were in the diameter range of 0.8 to 1.5 nm. The CNTs were characterized by various techniques including Raman spectroscopy, field emission scanning electron microscopy, and transmission electron microscopy. As-grown SWCNTs-based resistive sensor showed an excellent variation in sensor response in the trace sensing range from 1 to 50 ppm of NH 3 where the sensor response linearly increased with NH 3 concentration. The sensing mechanism was attributed to the electron transfer to the SWCNTs as a result of NH 3 oxidation on the nanotube surface. The sensor was found to have good sensitivity with a response time of a few minutes at room temperature. Sensor recovery posed a great problem at room temperature, and the fast and complete recovery was successfully achieved by using appropriate thermal treatment protocol.

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“…Single-walled carbon nanotubes (SWNTs) have been predominantly used due to their superior electrical conductivity and higher sensitivity relative to multiwalled carbon nanotubes [9]. To realize a sensing system with high sensitivity, we utilized functionalized SWNT's in order to enhance the gas detection sensitivity (see [10] for details about functionalized SWNTs). Unlike other work where the SWNTs are grown on special substrates through a costexpensive process in clean rooms [11][12][13], we incorporate the SWNTs through ink-jet printing.…”

Section: Ink Characterizationmentioning

confidence: 99%

Printed electronics for next generation wireless devices

Shaker

Lee

Safavi‐Naeini

et al. 2011

2011 Loughborough Antennas &Amp; Propagation Conference

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Abstract-In this talk, inkjet-printed structures on paper and other polymer substrates are discussed as means for low-cost mass-production of next generation wireless devices and Wireless Sensor Nodes. Three sample prototypes are outlined. The first system demonstrates a gas sensing prototype for home land security applications, where printed carbon nanotubes (CNTs) are utilized to sense ammonia gas traces. The second system demonstrates the potential of using printed electronics in producing low-cost location-finding systems for health-care applications. The third prototype shows the feasibility of using the printed technology for enabling wireless communications in the mm-Wave frequencies.

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Poly(m-aminobenzene sulfonic acid) functionalized single-walled carbon nanotubes based gas sensor

Cited by 122 publications

References 23 publications

Carbon-Nanotube Loaded Antenna-Based Ammonia Gas Sensor

Carbon-Nanotube Loaded Antenna-Based Ammonia Gas Sensor

Trace level ammonia sensing by SWCNTs (network/film) based resistive sensor using a simple approach in sensor development and design

Printed electronics for next generation wireless devices

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