Thermal conductivity characterization of three dimensional carbon nanotube network using freestanding sensor-based 3 ω technique

Kong, Qinyu; Qiu, Lin; Lim, Yu Dian; Tan, Chin Wen; Liang, Kun; Lu, Chunyang; Tay, Beng Kang

doi:10.1016/j.surfcoat.2018.03.090

Cited by 17 publications

(9 citation statements)

References 23 publications

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“…The third-harmonic method (3-x method) is commonly used in measurement of thermal properties of bulk materials and films [31][32][33][34][35][36][37][38][39], in which the sample is heated using alternating current with x frequency. A temperature variation with 2 x frequency was induced in the sample while heating, and a drop in voltage with 3 x frequency was recorded across the heater.…”

Section: Third-harmonic Methodsmentioning

confidence: 99%

“…The bridge is usually a metal wire made of gold [31] or platinum [32]. By applying voltage, the bridge generates heat and causes temperature differences in 2-x oscillation.…”

Section: Third-harmonic Methodsmentioning

confidence: 99%

“…Next under the pressure the CNT layer is pressed into the sensor. The sensor is a multilayer set, based on glass [33] or polymer [31], on which a metal bridge covered with an insulation layer is fixed to insulate the electric conductive bridge from the CNT sample. Figure 5 presents a schematic of the manner of preparing the sample [33].…”

Section: Third-harmonic Methodsmentioning

confidence: 99%

“…Kong et al [31,39] analyzed a three-dimensional carbon nanotube network composed of vaCNTs bridged with randomly oriented secondary CNTs. This 3D structure was obtained with a two-step process.…”

Section: Impact Of Densitymentioning

confidence: 99%

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Thermal conductivity of carbon nanotube networks: a review

2019

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Depending on their structure and order (individual, films, bundled, buckypapers, etc.), carbon nanotubes (CNTs) demonstrate different values of thermal conductivity, from the level of thermal insulation with the thermal conductivity of 0.1 W/mK to such high values as 6600 W/mK. This review article concentrates on analyzing the articles on thermal conductivity of CNT networks. It describes various measurement methods, such as the 3-x method, bolometric, steady-state method and their variations, hot-disk method, laser flash analysis, thermoreflectance method and Raman spectroscopy, and summarizes the results obtained using those techniques. The article provides the main factors affecting the value of thermal conductivity, such as CNT density, number of defects in their structure, CNT ordering within arrays, direction of measurement in relation to their length, temperature of measurement and type of CNTs. The practical methods of using CNT networks and the potential directions of future research in that scope were also described.

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Section: Third-harmonic Methodsmentioning

confidence: 99%

“…The bridge is usually a metal wire made of gold [31] or platinum [32]. By applying voltage, the bridge generates heat and causes temperature differences in 2-x oscillation.…”

Section: Third-harmonic Methodsmentioning

confidence: 99%

Section: Third-harmonic Methodsmentioning

confidence: 99%

Section: Impact Of Densitymentioning

confidence: 99%

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Thermal conductivity of carbon nanotube networks: a review

2019

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“…For the 3D CNT/GO hierarchical structured film with 15 wt% of CNTs, an ultrahigh in‐plane thermal conductivity of 1388.7 W m −1 K −1 was reported at 1000 °C, which decreases at either higher or lower weight fraction of CNTs . In comparison, the 3D CNT network exhibits a cross‐plane κ of about 19.8 W m −1 K −1 , which decreases with increasing transverse interconnected CNTs …”

Section: D Nanostructures For High Thermal Conductivitymentioning

confidence: 99%

Thermal Transport in 3D Nanostructures

Zhan

Nie

Chen

et al. 2019

Adv Funct Materials

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This work summarizes the recent progress on the thermal transport properties of 3D nanostructures, with an emphasis on experimental results. Depending on the applications, different 3D nanostructures can be prepared or designed to either achieve a low thermal conductivity for thermal insulation or thermoelectric devices or a high thermal conductivity for thermal interface materials used in the continuing miniaturization of electronics. A broad range of 3D nanostructures are discussed, ranging from colloidal crystals/assemblies, array structures, holey structures, hierarchical structures, to 3D nanostructured fillers for metal matrix composites and polymer composites. Different factors that impact the thermal conductivity of these 3D structures are compared and analyzed. This work provides an overall understanding of the thermal transport properties of various 3D nanostructures, which will shed light on the thermal management at nanoscale.

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Numerical Simulation and Experimental Research for Thermal Conductivity Measurements of Bulk Materials Based on A Frequency-Domain Hot-Strip Sensor

Yan

et al. 2022

Int J Thermophys

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Thermal conductivity characterization of three dimensional carbon nanotube network using freestanding sensor-based 3 ω technique

Cited by 17 publications

References 23 publications

Thermal conductivity of carbon nanotube networks: a review

Thermal conductivity of carbon nanotube networks: a review

Thermal Transport in 3D Nanostructures

Numerical Simulation and Experimental Research for Thermal Conductivity Measurements of Bulk Materials Based on A Frequency-Domain Hot-Strip Sensor

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