A carbon nanotube based NTC thermistor using additive print manufacturing processes

Turkani, Vikram S.; Maddipatla, Dinesh; Narakathu, Binu B.; Bazuin, Bradley J.; Atashbar, Massood Z.

doi:10.1016/j.sna.2018.05.042

Cited by 123 publications

(53 citation statements)

References 42 publications

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“…into an adequate polymer matrix [6,7,8]. In particular, graphite platelets, carbon nanotubes, fullerene, graphene, and other carbonaceous materials have been extensively studied and utilized to obtain conductive, thermoresistive, and semiconductive polymeric nanocomposites [9,10,11,12,13,14,15,16,17]. Furthermore, the surfaces of polymers such as poly (methyl methacrylate), polyethylene terephthalate and low-density polyethylene (LDPE) have been made conductive by depositing graphite or graphene layers onto them for the fabrication of printed radio frequency devices [18], electrically conductive paths [19], piezoresistive sensors [20], and strain gauges [9].…”

Section: Introductionmentioning

confidence: 99%

Thermoresistive Properties of Graphite Platelet Films Supported by Different Substrates

et al. 2019

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Large-area graphitic films, produced by an advantageous technique based on spraying a graphite lacquer on glass and low-density polyethylene (LDPE) substrates were studied for their thermoresistive applications. The spray technique uniformly covered the surface of the substrate by graphite platelet (GP) unities, which have a tendency to align parallel to the interfacial plane. Transmission electron microscopy analysis showed that the deposited films were composed of overlapped graphite platelets of different thickness, ranging from a few tens to hundreds of graphene layers, and Raman measurements provided evidence for a good graphitic quality of the material. The GP films deposited on glass and LDPE substrates exhibited different thermoresistive properties during cooling–heating cycles in the −40 to +40 °C range. Indeed, negative values of the temperature coefficient of resistance, ranging from −4 × 10−4 to −7 × 10−4 °C−1 have been observed on glass substrates, while positive values varying between 4 × 10−3 and 8 × 10−3 °C−1 were measured when the films were supported by LDPE. These behaviors were attributed to the different thermal expansion coefficients of the substrates. The appreciable thermoresistive properties of the graphite platelet films on LDPE could be useful for plastic electronic applications.

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Section: Introductionmentioning

confidence: 99%

Thermoresistive Properties of Graphite Platelet Films Supported by Different Substrates

et al. 2019

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“…For an accurate temperature control and measurement, the electro-thermal properties of as-deposited CNT and C-CNT heaters are characterized. MWCNTs show linear temperature coefficient of resistance (TCR) [25], hence its temperature can be calibrated from the measured electrical resistance. TCR of fabricated heaters are measured while monitoring the heater temperature using an infrared (IR) camera with varying input voltage.…”

Section: Methodsmentioning

confidence: 99%

High Efficiency Crumpled Carbon Nanotube Heaters for Low Drift Hydrogen Sensing

Park

Jang

Lee

et al. 2019

Sensors

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This work presents the fabrication of crumpled carbon nanotubes (C-CNTs) thin film heaters and their application towards high sensitivity and low drift hydrogen gas sensing. Utilizing a spray coating of pristine multi-walled carbon nanotubes (MWCNTs) and thermal shrinkage of polystyrene (PS) substrate, we have fabricated C-CNTs with closely packed junctions. Joule heating of C-CNTs gives higher temperature at a given input voltage compared to as-deposited CNTs. In addition, temperature coefficient of resistance (TCR) is analyzed for accurate temperature control and measurement of the heater. The C-CNT heaters are capable of hydrogen gas sensing while demonstrating higher measurement sensitivities along with lower drift compared to as-deposited CNT devices. In addition, the self-heating of C-CNT heaters help rapid desorption of hydrogen, and thus allowing repetitive and stable sensor operation. Our findings reveal that both CNT morphologies and heating temperatures affect the hydrogen sensing performances.

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“…The performance of the fabricated sensor is found to be much better than most of the existing sensors reported so far. [105][106][107][108][109][110][111][112][113][114][115][116][117] A comparison is presented in Table 2 to assess its performance vis-à-vis some of the recently reported temperature sensors.…”

Section: Resolution Testmentioning

confidence: 99%