Inkjet printed resistive and chemical‐FET carbon nanotube gas sensors

Mäklin, Jani; Mustonen, Tero; Halonen, Niina; Tóth, Géza; Kordás, Krisztián; Vähäkangas, Jouko; Moilanen, Hannu; Kukovecz, Ákos; Kónya, Zoltán; Haspel, Henrik; Gingl, Zoltán; Heszler, Péter; Vajtai, Róbert; Ajayan, Pulickel M.

doi:10.1002/pssb.200879580

Cited by 24 publications

(19 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adsorption of electrons decreases the number of holes resulting in an increase in the resistance of the sensor. This behavior is consistent with previously reported CNT based gas sensors . However, for higher levels of gas concentrations, there is a lower increase in the resistance which indicates saturated behavior.…”

Section: Resultssupporting

confidence: 92%

“…As such nanotubes can show higher sensitivities and fast response . Carbon nanotubes (CNTs) have been used for the realization of different gas sensors including H 2 S . However, fully inkjet‐printed H 2 S gas sensors have not been shown yet.…”

Section: Resultsmentioning

confidence: 99%

“…As can be seen in Figure e, the sensor shows high selectivity toward H 2 S. This is first fully inkjet‐printed H 2 S sensor reported so far which has been realized on a 3D‐printed substrate. Previously reported inkjet‐printed H 2 S sensors describe only the inkjet printing of the sensing layer on either photo lithographically defined electrodes on silicon or screen printed electrodes on polyehtylene terephthalate (PET) so do not qualify as fully printed systems.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

3D‐Printed Disposable Wireless Sensors with Integrated Microelectronics for Large Area Environmental Monitoring

Farooqui

Karimi

Salama

et al. 2017

Adv Materials Technologies

View full text Add to dashboard Cite

Large area environmental monitoring can play a crucial role in dealing with crisis situations. However, it is challenging as implementing a fixed sensor network infrastructure over large remote area is economically unfeasible. This work proposes disposable, compact, dispersible 3D‐printed wireless sensor nodes with integrated microelectronics which can be dispersed in the environment and work in conjunction with few fixed nodes for large area monitoring applications. As a proof of concept, the wireless sensing of temperature, humidity, and H2S levels are shown which are important for two critical environmental conditions namely forest fires and industrial leaks. These inkjet‐printed sensors and an antenna are realized on the walls of a 3D‐printed cubic package which encloses the microelectronics developed on a 3D‐printed circuit board. Hence, 3D printing and inkjet printing are uniquely combined in order to realize a low‐cost, fully integrated wireless sensor node.

show abstract

Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

3D‐Printed Disposable Wireless Sensors with Integrated Microelectronics for Large Area Environmental Monitoring

Farooqui

Karimi

Salama

et al. 2017

Adv Materials Technologies

View full text Add to dashboard Cite

show abstract

“…This fact is complemented by the enhanced adsorption of gases by carbon nanomaterials [8]. There are a wide range of gases on which the carbon nanotube-(CNT-) based sensors can be used, such as NH 3 [4,[10][11][12][13][14][15][16], NO 2 [17,18], CH 4 [19,20], H 2 [21], H 2 S [22][23][24][25], CO 2 [26], ethanol [25], methanol [25], hydrocarbons [7], and other gases.…”

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

“…Devices made of individual semiconducting nanotubes clearly outperform those made of films of tangled networks and show significant molecular gating effect [47]. In the case of nanotube networks or bundles, the sensor response is typically higher for the less conductive sensing layers [54,55].…”

Section: Measurements With Sequential No and Nh 3 Pulsesmentioning

confidence: 99%

Gas Sensing and Thermal Transport Through Carbon-Nanotube-Based Nanodevices

Pouillon

Paz

Mäklin

et al. 2014

Challenges and Advances in Computational Chemistry and Physics

View full text Add to dashboard Cite

Designing nanoscale devices, such as gas sensors and thermal dissipators, is challenging at multiple levels. Exploring their properties through combined experimental and theoretical collaborations is a valuable approach that expands the understanding of their peculiarities and allows for the optimization of the design process. In order to select the most relevant functional molecules for carbon-based gas sensors, and provide the best sensitivity and selectivity possible, we study the electronic transport properties of functionalized carbon nanotubes (CNTs), both through experiments and theoretical calculations. The measurements are carried out both in argon and synthetic air, using CO, NO, and H 2 S as test cases, with carboxyl-functionalized CNTs. The calculations, performed in the framework of density functional theory, consider both metallic and semi-conducting prototype CNTs, with respective chiralities (6,6) and (7,0), exploring a broader range of functional molecules and gases. The behavior of individual carboxyl-functionalized CNTs deduced from the multiscale results consistently reflect what happens at a larger scale and provides useful insights regarding the experimental results. CNTs

show abstract

Inkjet printed resistive and chemical‐FET carbon nanotube gas sensors

Cited by 24 publications

References 18 publications

3D‐Printed Disposable Wireless Sensors with Integrated Microelectronics for Large Area Environmental Monitoring

3D‐Printed Disposable Wireless Sensors with Integrated Microelectronics for Large Area Environmental Monitoring

Enhanced Ammonia Adsorption on Directly Deposited Nanofibrous Carbon Films

Gas Sensing and Thermal Transport Through Carbon-Nanotube-Based Nanodevices

Contact Info

Product

Resources

About