Development and Improvement of Carbon Nanotube-Based Ammonia Gas Sensors Using Ink-Jet Printed Interdigitated Electrodes

Teerapanich, Pattamon; Myint, Myo Tay Zar; Joseph, C.M.; Hornyak, Gabor L.; Dutta, Joydeep

doi:10.1109/tnano.2013.2242203

Cited by 51 publications

(35 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In [27], the authors created HCl-doped MWCNT/ polyaniline composite sensors with good sensing response and high reproducibility. In [28], the authors created SWCNT-(40% metallic and 60% semiconducting) based ammonia sensors using inkjet-printed electrodes which possessed the maximal response of 27.3% for 500 ppm at room temperature. Cui et al [29] developed the room temperature ammonia sensor based on Ag nanocrystal-functionalized MWCNTs that exhibited enhanced response of 9% and fast response at room temperature with the full recovery within several minutes in air.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Ammonia Adsorption on Directly Deposited Nanofibrous Carbon Films

et al. 2018

View full text Add to dashboard Cite

The ammonia adsorption on the nanostructured carbon thin film was significantly influenced by the choice of deposition temperature and deposition time of thin film synthesis. The thin films were prepared on Si/SiO2 substrates by chemical vapour deposition in Ar/C2H2 gas mixture using iron catalytic nanoparticles. The analysis of the grown layer by the scanning and transmission electron microscopy showed the transition from long multiwalled nanotubes (MWCNTs) to bamboo-like hollow carbon nanofiber structure with the decrease of the deposition temperature from 700 to 600°C. Further, the material was analyzed by energy-dispersive X-ray spectroscopy and Raman spectroscopy confirmed the transition from graphitic sp2 structure to highly defective structure at lower deposition temperature. The resistance of the prepared layer strongly depends on deposition temperature (Td) and deposition time (td). High resistance layer, 38.6 kΩ, was formed at Td 600°C and td 10 min, while at Td 700°C and td 60 min, the resistance decreased to 860 ohms. Such behaviour is consistent with MWCNTs being responsible for the formation of the conductive network. Such system was studied using chemiresistor ammonia gas sensor configuration. The sensor resistance increased when exposed to ammonia in all the cases, but their response varied considerably. A decrease in deposition time, from 60 to 10 min, and the deposition temperature, from 700 to 600°C, led to the 10-fold increase in the sensor response. The measurements carried out at room temperature showed the higher sensor response than the measurements carried out at 200°C. This behaviour can be explained by the change in adsorption-desorption equilibrium at different temperatures. Analysis of dependence of the sensor response on the ammonia concentration proved that the underlying resistance change mechanism is chemisorption of ammonia molecules on the carbon network corresponding to the Langmuir isotherm.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced Ammonia Adsorption on Directly Deposited Nanofibrous Carbon Films

et al. 2018

View full text Add to dashboard Cite

show abstract

“…9,[11][12][13][14][15][16][17][18][19][20] A sensing mechanism of these carbon-based materials toward reducing gases such as ammonia is based on a decrease in the conductivity, which is consistent with p-type doping. Carbon nanotubes, exfoliated graphene sheets, graphitic nanoribbon lms and graphite oxide, for instance, have proven to have a very high sensitivity to different gases, including ammonia.…”

Section: Introductionmentioning

confidence: 99%

Activated carbon-based gas sensors: effects of surface features on the sensing mechanism

et al. 2015

View full text Add to dashboard Cite

Ammonia sensing capability of a commercial wood-based activated carbon (BAX) and its oxidized counterpart (BAX-O) was studied. The materials were exposed to continuous cycles of various ammonia concentrations, followed by purging with air, and changes in a normalized resistance were analyzed. When initially exposed to the reducing gas, chemical interactions between ammonia and the carbons generated an irreversible signal change, which was stronger in the case of the initial carbon. After equilibration and reactive adsorption the sensors were further tested with ammonia. During the reversible sensing, the two carbons exhibited opposite trends in their signal. This indicates that oxidation changed the electrical properties of the carbon sample, leading to a different sensing mechanism. For the initial material holes play the predominant role in a current transport, while their depletion upon the exposure to the reducing gas leads to a decrease in the conductivity. In the case of the oxidized sample, the presence of electron donating nitro groups causes a hole annihilation in the carbon itself converting it to a predominantly n-type material. Here the exposure to ammonia increases the conductivity of the chip owing to the electron donating properties of the gas. Physical interactions, such as hydrogen bonding, polar interactions with surface functional groups, and dispersive interactions of ammonia with the carbon matrix, lead to the pore filling, which governs the extent of the response signal. The sensor signal changes linearly with the ammonia concentration.

show abstract

“…Due to the unique physicochemical and electrical properties, carbon nanotubes (CNTs) have been widely used in the field of electronics [12][13][14], conducting materials [15,16], hydrogen storage [17,18], chemical sensors [19][20][21] as well as drug carriers [22,23], and so forth. Because of their high surface area and large micropore volume, CNTs are also considered as extremely good adsorbents [24].…”

Section: Introductionmentioning

confidence: 99%

Removal and Adsorption of p‐Nitrophenol from Aqueous Solutions Using Carbon Nanotubes and Their Composites

Yao

Liu

et al. 2014

Journal of Nanomaterials

View full text Add to dashboard Cite

In an attempt to explore the possibility of using carbon nanotubes (CNTs) as efficient adsorbents for removal of pollutants from the contaminated water, the adsorption ofp-nitrophenol (PNP) on raw multiwalled carbon nanotubes (r.MWNTs) with different outer diameters, various functionalized multiwalled carbon nanotubes (f-MWNTs), raw single-walled carbon nanotubes (r.SWNTs) and oxidized single-walled carbon nanotubes (ox-SWNTs) has been investigated. The ox-SWNTs showed better adsorption ability for PNP with different concentrations, while lower uptake capacity was found for all of the r.MWNTs andf-MWNTs. The removal efficiency of PNP by ox-SWNTs was around 98%, indicating that ox-SWNTs possess a great potential application prospect for removing PNP from aqueous solutions.

show abstract

Development and Improvement of Carbon Nanotube-Based Ammonia Gas Sensors Using Ink-Jet Printed Interdigitated Electrodes

Cited by 51 publications

References 38 publications

Enhanced Ammonia Adsorption on Directly Deposited Nanofibrous Carbon Films

Enhanced Ammonia Adsorption on Directly Deposited Nanofibrous Carbon Films

Activated carbon-based gas sensors: effects of surface features on the sensing mechanism

Removal and Adsorption of p‐Nitrophenol from Aqueous Solutions Using Carbon Nanotubes and Their Composites

Contact Info

Product

Resources

About