Functionalized-Carbon Nanotube Sensor for Room Temperature Ammonia Detection

Hannon, Ami; Lu, Yingchao; Hong, Haiping; Li, Jiaqian; Meyyappan, M.

doi:10.1166/sl.2014.3301

Cited by 17 publications

(12 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In another channel of the sensor chip using carboxylic acid functionalized SWCNTs, the corresponding responses were higher at 2.5, 15 and 24%. The sensor response and detection limit obtained here are comparable to previous ammonia sensors on flexible and other substrates [39,40,42,43] confirming the suitability of the plasma printed samples for gas sensing applications. Additional variations in nanotubes can include doping, different functionalizations [42], metal loading etc.…”

Section: B Sno 2 and Copper Oxide Printingsupporting

confidence: 82%

Atmospheric Pressure Plasma Printing of Nanomaterials for IoT Applications

Ramamurti¹,

Gandhiraman²,

Lopez³

et al. 2020

IEEE Open J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

An atmospheric pressure plasma based printer is described as an alternative to conventional techniques including inkjet printing. The approach is demonstrated to be capable of printing various nanomaterials, and adjusting the plasma parameters, carrier gas flows and the physical parameters of the inks or nanomaterial suspensions can optimize the print quality. Raman analysis was used to characterize the oxide materials and carbon nanotubes printed using this technique, revealing high quality prints. The printed carbon nanotubes were used in a gas sensor chip and shown to provide good ammonia detection capability.

show abstract

Section: B Sno 2 and Copper Oxide Printingsupporting

confidence: 82%

Atmospheric Pressure Plasma Printing of Nanomaterials for IoT Applications

Ramamurti¹,

Gandhiraman²,

Lopez³

et al. 2020

IEEE Open J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Conventional photolithography is adequate for patterning the electrode since the gap size is 2–10 μm. When the sensor is made on printed circuit board substrates, the finger gap may be larger, around 50–100 μm …”

Section: Sensor Developmentmentioning

confidence: 99%

“…The sensor is loaded in a test chamber consisting of gas flow arrangements, a heater if desired, and the necessary electronics to measure the current‐voltage (I‐V) characteristics, as shown in Figure . A common commercial setup Environics 2000 (Environics Inc. Tolland, CT) is a computerized gas blending and dilution system that allows creation of different gas concentration streams . It is also important to control the temperature and humidity during sensor testing.…”

Section: Sensor Developmentmentioning

confidence: 99%

“…Occasionally, results are reported in the literature in the form of R g /R a where R g is the resistance during analyte flow and R a is resistance during just airflow. Figure provides an example of chemiresistive sensor response to ammonia exposure with carboxylic acid functionalized SWCNTs as the sensor material . The sensor was purged with an airflow rate of 400 cm 3 min −1 for the first 15 min and then dosages of 10, 20, 40, 60, and 100 ppm of NH 3 were admitted at the intervals shown in the figure.…”

Section: Sensor Developmentmentioning

confidence: 99%

“…The sensor discussed in Figure above was also exposed to several other gases such as NO 2 , CH 4 , H 2 , SO 2 , CO and Cl 2 . Figure shows the normalized sensor response (with carboxylic acid functionalized SWCNTs) for 10 ppm concentration of each of the gases.…”

Section: Sensor Developmentmentioning

confidence: 99%

See 2 more Smart Citations

Carbon Nanotube‐Based Chemical Sensors

Meyyappan

2016

Small

Self Cite

177

122

View full text Add to dashboard Cite

The need to sense gases and vapors arises in numerous scenarios in industrial, environmental, security and medical applications. Traditionally, this activity has utilized bulky instruments to obtain both qualitative and quantitative information on the constituents of the gas mixture. It is ideal to use sensors for this purpose since they are smaller in size and less expensive; however, their performance in the field must match that of established analytical instruments in order to gain acceptance. In this regard, nanomaterials as sensing media offer advantages in sensitivity, preparation of chip-based sensors and construction of electronic nose for selective detection of analytes of interest. This article provides a review of the use of carbon nanotubes in gas and vapor sensing.

show abstract

Decomposable s‐Tetrazine Copolymer Enables Single‐Walled Carbon Nanotube Thin Film Transistors and Sensors with Improved Sensitivity

Ding

Guo

et al. 2018

Adv Funct Materials

View full text Add to dashboard Cite

Semiconducting single‐walled carbon nanotubes (sc‐SWCNTs) enriched by a conjugated polymer extraction process have been actively studied for various applications in both electronics and optoelectronics. Although the resulting tube samples usually have high sc‐purity and concentration, SWCNT networks from such dispersions typically contain residual conjugated polymer that may degrade device performance and its removal remains a challenge while maintaining uniform, dense SWCNT thin film networks. In this study, a novel polymer–SWCNT combination based on an alternating bisfuran‐s‐tetrazine and benzo[1,2‐b:4,5‐b′]dithiophene copolymer abbreviated as PBDTFTz is proposed. This polymer decomposes at >250 °C or under UV irradiation. In situ transistor characterization under laser irradiation confirms the polymer decomposition. The study of the tube network in the transistor channel at various channel lengths reveals significantly reduced contact resistance attributed to removal of the wrapping PBDTFTz polymer. In ammonia sensing experiments, sc‐SWCNT networks demonstrate rapid and reversible responses, while the unwrapped nanotube networks prove superior in terms of signal to noise ratio and a detection limit of 2.5 ppb is calculated, almost four times better than polymer wrapped nanotubes.

show abstract

Functionalized-Carbon Nanotube Sensor for Room Temperature Ammonia Detection

Cited by 17 publications

References 0 publications

Atmospheric Pressure Plasma Printing of Nanomaterials for IoT Applications

Atmospheric Pressure Plasma Printing of Nanomaterials for IoT Applications

Carbon Nanotube‐Based Chemical Sensors

Decomposable s‐Tetrazine Copolymer Enables Single‐Walled Carbon Nanotube Thin Film Transistors and Sensors with Improved Sensitivity

Contact Info

Product

Resources

About