Nanoscale Heat Transfer in Carbon Nanotubes - Sugar Alcohol Composite as Heat Storage Materials

Zhang, H Huaichen; Rindt, Ccm Camilo; Smeulders, David; Nedea, SV Silvia

doi:10.1021/acs.jpcc.6b05466

Cited by 18 publications

(10 citation statements)

References 41 publications

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“…The temperature of nanocrystal was estimated assuming heat transfer coefficient between one-dimensional nanocrystal and nanotube wall of 2 × 10 6 W/(m 2 •K), which is consistent with the results obtained for structured capsulates inside SWNTs 42,43 and the contact surface area equal to nanocrystal external surface. Calculation details are given in the Supporting Information, section S3.…”

Section: ■ Results and Discussionsupporting

confidence: 85%

Mass Transport through Defects in Graphene Layers

et al. 2017

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The paper reports an experimental study of ZnTe and CuI transport through graphene wall of SWNTs by high resolution transmission electron microscopy. It is shown that encapsulated material evacuates the tube through the defects in the nanotube walls, while in-tube diffusion appears high enough to provide matter intake from the nanotube volume. Diffusion kinetics was studied by "atoms count" resulting in ZnTe and CuI diffusivities of 7.67 × 10 −21 and 1.99 × 10 −20 m 2 /s through single defects in SWNT wall. Semiempirical and DFT modeling of potential energy profiles for different types of defects was utilized to propose minimal structural disturbances in a graphene layer to make possible cross-plane transport of matter. The comparison of experimentally observed diffusivities with calculated activation barrier heights was carried out taking into account an effective temperature of substance under electron beam. Neither of the defects including framework disturbance with 5−7 defects or sp 3 -bound carbon atomic pairs give rise to valuable mass-transport efficiencies through graphene layer. Reasonable conformity of the results is only achieved with carbon vacancy pairs in sp 2 -carbon layer, thus, indicating effective transport of matter occurring through the "holes" in graphene.

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Section: ■ Results and Discussionsupporting

confidence: 85%

Mass Transport through Defects in Graphene Layers

et al. 2017

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“…The study of transport mechanisms at the nano-/micro-scale is of huge importance nowadays. In particular, nanoparticles and nanotubes demonstrate critical physical applications for nanoscale heat transfer [ 6 , 7 ]. There exist a number of models developed in a simple manner to point-like particles.…”

Section: Kozłowski Thermal Modelmentioning

confidence: 99%

Thermal Nonlinear Klein–Gordon Equation for Nano-/Micro-Sized Metallic Particle–Attosecond Laser Pulse Interaction

et al. 2021

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In this study, a rigorous analytical solution to the thermal nonlinear Klein–Gordon equation in the Kozłowski version is provided. The Klein–Gordon heat equation is solved via the Zhukovsky “state-of-the-art” mathematical techniques. Our study can be regarded as an initial approximation of attosecond laser–particle interaction when the prevalent phenomenon is photon–electron interaction. The electrons interact with the laser beam, which means that the nucleus does not play a significant role in temperature distribution. The particle is supposed to be homogenous with respect to thermophysical properties. This theoretical approach could prove useful for the study of metallic nano-/micro-particles interacting with attosecond laser pulses. Specific applications for Au “nano” particles with a 50 nm radius and “micro” particles with 110, 130, 150, and 1000 nm radii under 100 attosecond laser pulse irradiation are considered. First, the cross-section is supposed to be proportional to the area of the particle, which is assumed to be a perfect sphere of radius R or a rotation ellipsoid. Second, the absorption coefficient is calculated using a semiclassical approach, taking into account the number of atoms per unit volume, the classical electron radius, the laser wavelength, and the atomic scattering factor (10 in case of Au), which cover all the basic aspects for the interaction between the attosecond laser and a nanoparticle. The model is applicable within the 100–2000 nm range. The main conclusion of the model is that for a range inferior to 1000 nm, a competition between ballistic and thermal phenomena occurs. For values in excess of 1000 nm, our study suggests that the thermal phenomena are dominant. Contrastingly, during the irradiation with fs pulses, this value is of the order of 100 nm. This theoretical model’s predictions could be soon confirmed with the new EU-ELI facilities in progress, which will generate pulses of 100 as at a 30 nm wavelength.

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“…Besides graphite or graphene, carbon nanotubes (CNTs) are more typical nano-particles in composite. Zhang et al [20] investigated on nanoscale heat transfer in composite of sugar alcohol and carbon nanotubes. It is reported that specific improvement of heat transfer depends on the material and the diameter of CNT.…”

Section: Dispersion Of High Conductive Particlesmentioning

confidence: 99%

Experimental and Numerical Studies on Phase Change Materials

Wang¹,

Zhu²

2018

Phase Change Materials and Their Applications

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Phase change materials (PCMs) are attracting significant attentions in research and application, categorized into mainly three types, that is, organic (O), inorganic (IO) and eutectic (E). This section introduces the experimental and numerical investigations conducted in recent decades, mainly focused on the properties enhancement of PCMs and the performance improvement of its application in latent heat storage (LHS) units, as well as the evaluation and optimization of LHS units. It was concluded that lots of contribution have been made to PCMs and LHS units analysis. However, there is still some weakness in research, such as the lackness of detailed and systematic research on properties, the nonuniform standard on testing method as well as the contradictory conclusions. The most evaluation of LHS units is based on energy, instead of exergy, entropy and entransy. There is another issue that most of the research is based on numerical analysis, while less experimental research is conducted, especially in the case of LHS unit.

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Nanoscale Heat Transfer in Carbon Nanotubes - Sugar Alcohol Composite as Heat Storage Materials

Cited by 18 publications

References 41 publications

Mass Transport through Defects in Graphene Layers

Mass Transport through Defects in Graphene Layers

Thermal Nonlinear Klein–Gordon Equation for Nano-/Micro-Sized Metallic Particle–Attosecond Laser Pulse Interaction

Experimental and Numerical Studies on Phase Change Materials

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