A transconductive graphene pressure sensor

Hurst, Adam M.; Lee, S.; Petrone, Nicholas; VanDeWeert, Joe; Zande, Arend M. van der; Hone, James

doi:10.1109/transducers.2013.6626834

Cited by 16 publications

(11 citation statements)

References 10 publications

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“…If higher accuracy is required, then higher order polynomials can be considered [44]. However, in our case, 3rd order polynomial regression model (6) gives acceptable range of accuracy and a best fit to the experimental data ( Figure 9) as shown in Figure 11. (Figure 9) and simulation (7) for CNT-graphene composite sample.…”

Section: Experimental Versus Simulationmentioning

confidence: 87%

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Pressure Sensitive Sensors Based on Carbon Nanotubes, Graphene, and Its Composites

Ali

Khan

Каримов

et al. 2018

Journal of Nanomaterials

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Carbon nanotubes (CNTs) and graphene have attracted a great deal of interest due to their outstanding mechanical, optical, electrical, and structural properties. Most of the scientists and researchers have investigated the optical and electrical properties of these materials. However, due to unique electromechanical properties of these materials, it is required to explore the piezoresistive properties of bulk nanostructured CNTs, graphene, and CNT-graphene composites. We investigated and compared the sensitivities and piezoresistive properties of sandwich-type pure CNT, pure graphene, and CNT-graphene composite pressure sensors. For all the samples, increase in pressure from 0 to 0.183 kNm −2 results in a decrease in the impedance and direct current (DC) resistance. Sensitivity and percentage decrease in resistance and impedance of CNT-graphene composite were lower than pure CNT while being higher than pure graphene based sample. Moreover, under the same external applied pressure, the sensitivity and percentage decrease in impedance for pure CNT, pure graphene, and CNT-graphene composite were smaller than the corresponding sensitivity and percentage decrease in resistance. The achieved experimental results of the composite sample were compared with simulated results which exhibit reasonable agreement with each other. The deviations of simulated resistance-pressure and impedancepressure curves from experimental graphs were 0.029% and 0.105%, respectively.

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Section: Experimental Versus Simulationmentioning

confidence: 87%

“…The tensile strength and elasticity of carbon nanotubes (CNTs) are hundred and five times higher than steel, respectively [4]. On the other hand, graphene can withstand with a strain up to 20% and its Young's modulus is almost six hundred and thousand times higher than semiconductors and metals, respectively [5,6].…”

Section: Introductionmentioning

confidence: 99%

Pressure Sensitive Sensors Based on Carbon Nanotubes, Graphene, and Its Composites

Ali

Khan

Каримов

et al. 2018

Journal of Nanomaterials

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“…The density of MWCNT is about 25–30% of steel, while its tensile strength and elasticity are 100 and 5 times greater than steel, respectively [ 4 , 5 ]. On the other hand, the Young’s Modulus of graphene is 1000 and 600 times larger than metals and semiconductors, respectively [ 6 , 7 ]. Graphene and MWCNTs are optimal nanostructured materials for pressure-sensing technology, due to their best structural properties, low density, high gauge factor, and a wide range of applications in many fields [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Physical and Mechanical Properties of Carbon Nanotubes—Graphene-Based Sandwich Composite Pressure Sensor

Ali

Rashedi

et al. 2021

Nanomaterials

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In this work, piezoresistive properties of graphene-multiwalled carbon nanotubes (MWCNTs) composites are investigated, characterized, and compared. Sandwich-type composite piezoresistive pressure-sensitive sensors (Ag/Graphene-MWCNT/Ag) with the same diameters, but different fabrication pressures and thicknesses were fabricated using the mortar and pestle/hydraulic press technique. To produce low-electrical-resistance contacts, both sides of the composite sensors were painted with silver (Ag) paste. All the sensors showed reductions in the direct current (DC) resistance ‘R’ with an increment in external uniaxial applied pressure. However, it was observed that higher fabrication pressure led to a lower resistance value of the composite, while the thicker samples give lower electrical conductivity and higher resistance than the thinner samples. The experimental data for all composite pressure sensors were in excellent agreement with the simulated results.

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“…Recently, the pressure sensors based on graphene material are widely researched because they have many advantages such as higher sensitivity, better linearity, and smaller dimensions [5]. In 2012, Smith et al proposed a graphene‐based pressure sensor to induce strain by creating a pressure difference between the inside and the outside of a cavity [6].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the theoretical model of graphene pressure sensors

Wang

Zhao

et al. 2020

Electron. lett.

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In order to study the effect of shape on graphene pressure sensors, a theoretical model of polymerisation degree is proposed in this work. According to the theoretical model of polymerisation degree, it is found that the regular polygons have better sensitivity characteristics. The more the number of sides for the regular polygons, the larger the polymerisation degree, and the better the sensitivity of the graphene pressure sensors. According to the theoretical model, the polymerisation degree of the positive triangle, regular quadrilateral, regular pentagon, and circle shape is 0.5, 0.71, 0.81, and 1, respectively. The measured results show that the relative resistance change of positive triangle, regular quadrilateral, regular pentagon, and circle shape are 8.56, 9.24, 9.61, and 10.4%, respectively. The experimental results are consistent with the theoretical results. Therefore, the theoretical model of polymerisation degree can provide effective quantitative guidance for the graphene pressure sensors.

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A transconductive graphene pressure sensor

Cited by 16 publications

References 10 publications

Pressure Sensitive Sensors Based on Carbon Nanotubes, Graphene, and Its Composites

Pressure Sensitive Sensors Based on Carbon Nanotubes, Graphene, and Its Composites

Fabrication and Characterization of Physical and Mechanical Properties of Carbon Nanotubes—Graphene-Based Sandwich Composite Pressure Sensor

Investigation on the theoretical model of graphene pressure sensors

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