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Advances in Heat Transfer and Property Characterization of Nano Materials
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Advances in Heat Transfer and Property Characterization of Nano Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: closed (20 August 2023) | Viewed by 5380

Special Issue Editors

Dr. Haidong Wang

E-Mail Website
Guest Editor
Institute of Engineering Thermophysics, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
Interests: micro/nanoscale heat transfer; design and fabrication of nanodevices; nanoscale measurement techniques; single-molecule detection; all-solid-state lithium battery
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Shenghong Ju

E-Mail Website
Guest Editor
China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai, China
Interests: micro/nano heat transfer; molecular dynamics simulation; multiscale simulation of energy materials; new energy materials and devices

Special Issue Information

Dear Colleagues,

Recently, many new nanomaterials have been discovered and show promising potential applications in nanoelectronics, novel sensors, energy storage devices, etc. Many new achievements have been made in developing more accurate measurement techniques and more efficient simulation tools, leading to a deep understanding of physical mechanisms of phonon/charge transportation in nanomaterials.

At nanoscales, special attention should be paid to experimentation and simulation. The characteristic dimension of samples is several nanometers, much smaller than the size of sensors. New designs of nanosensors or non-contact measurement techniques with high resolution are essential for an accurate characterization of nanomaterials. On the other hand, some newly discovered nanomaterials, such as layered graphene with a twisted angle, Mxenes, transition metal sulfide, black phosphorus, etc., have unique electronic structures and a complex coupling effect between charge and heat transportation. This introduces new challenges to the traditional molecular dynamics simulation method, as more accurate and intrinsic molecular information should be given using advanced first-principle calculation or artificial intelligence algorithm. Great efforts have been dedicated to both experimental and numerical research, which has become a highly focused topic with new progress in recent years.

It is my great pleasure to invite you to submit a manuscript to this Special Issue and contribute to the exciting field of characterization and development of nanomaterials/devices. This Special Issue welcomes papers focused on, though not limited to, heat transfer, property characterization, and device fabrication of nanomaterials.

Prof. Dr. Haidong Wang
Prof. Dr. Shenghong Ju
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanowires
  • carbon nanotubes
  • graphene
  • 2D materials
  • nanoscale heat transfer
  • molecular dynamics
  • first-principle calculation
  • artificial intelligence
  • nanoelectronic devices
  • property characterization

Published Papers (4 papers)

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Research

11 pages, 3658 KiB  
Article
A Buckling Analysis of Thermoelastic Micro/Nano-Beams Considering the Size-Dependent Effect and Non-Uniform Temperature Distribution
by Xin Ren and Shuanhu Shi
Materials 2023, 16(19), 6390; https://doi.org/10.3390/ma16196390 - 25 Sep 2023
Cited by 1 | Viewed by 737
Abstract
Thermoelastic buckling of micro/nano-beams subjected to non-uniform temperature distribution is investigated in this paper. The mechanical governing equation is derived based on the surface effect and mechanical non-local effect. The non-local heat conduction model is used to predict temperature distribution in micro/nano-beams. Therefore, [...] Read more.
Thermoelastic buckling of micro/nano-beams subjected to non-uniform temperature distribution is investigated in this paper. The mechanical governing equation is derived based on the surface effect and mechanical non-local effect. The non-local heat conduction model is used to predict temperature distribution in micro/nano-beams. Therefore, the obtained analytical solution can be used to analyze the influence of both the mechanical and thermal small scale effects on buckling of thermoelastic micro/nano-beams. In numerical simulations, a critical thickness is proposed to determine the influence region of both mechanical and thermal small scale effects. The influence of a small scale effect on buckling of micro/nano-beams must be considered if beam thickness is less than the critical thickness. In the influence region of a small scale effect, a surface effect has strong influence on the size-dependent buckling behavior, rather than mechanical and thermal non-local effects. Moreover, combined small scale effects, i.e., a surface effect and both mechanical and thermal non-local effects, lead to a larger critical load. Additionally, the influence of other key factors on buckling of the micro/nano-beams is studied in detail. This paper provides theoretical explanation to the buckling behaviors of micro/nano-beams under a non-uniform temperature distribution load. Full article
(This article belongs to the Special Issue Advances in Heat Transfer and Property Characterization of Nano Materials)
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15 pages, 5949 KiB  
Article
Non-Fourier Heat Conduction of Nano-Films under Ultra-Fast Laser
by Yudong Mao, Shouyu Liu, Jiying Liu, Mingzhi Yu, Xinwei Li and Kaimin Yang
Materials 2023, 16(14), 4988; https://doi.org/10.3390/ma16144988 - 13 Jul 2023
Cited by 1 | Viewed by 994
Abstract
The ultra-fast laser heating process of nano-films is characterized by an ultra-short duration and ultra-small space size, in which the classical Fourier law based on the hypothesis of local equilibrium is no longer applicable. Based on the Cattaneo–Vernotte (CV) model and the dual-phase-lag [...] Read more.
The ultra-fast laser heating process of nano-films is characterized by an ultra-short duration and ultra-small space size, in which the classical Fourier law based on the hypothesis of local equilibrium is no longer applicable. Based on the Cattaneo–Vernotte (CV) model and the dual-phase-lag (DPL) model, the two-dimensional analytical solutions of heat conduction in nano-films under ultra-fast laser are obtained using the integral transformation method. The results show that there is a thermal wave phenomenon inside the film, which becomes increasingly evident as the elapse of the lag time of the temperature gradient. Moreover, the wave amplitude in the vertical direction is much larger than that in the horizontal direction of the nano-film. By comparing the numerical result of the two models, it is found that the temperature distribution inside the nano-film based on the DPL model is gentler than that of the CV model. Additionally, the temperature distribution in the two-dimensional solution is lower than that in the one-dimensional solution under the same Knudsen number. In the comparison results of the CV model, the maximum peak difference in the thermal wave reaches 75.08 K when the Knudsen number is 1.0. This demonstrates that the horizontal energy carried by the laser source significantly impacts the temperature distribution within the film. Full article
(This article belongs to the Special Issue Advances in Heat Transfer and Property Characterization of Nano Materials)
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9 pages, 2112 KiB  
Article
Homogeneous Zero-Index Thermal Metadevice for Thermal Camouflaging and Super-Expanding
by Huagen Li, Kaipeng Liu, Tianfeng Liu and Run Hu
Materials 2023, 16(10), 3657; https://doi.org/10.3390/ma16103657 - 11 May 2023
Cited by 1 | Viewed by 1195
Abstract
The infinite effective thermal conductivity (IETC) can be considered to be an equivalence of the effective zero index in photonics. A recent highly rotating metadevice has been discovered to approach near IETC, subsequently demonstrating a cloaking effect. However, this near IETC, related to [...] Read more.
The infinite effective thermal conductivity (IETC) can be considered to be an equivalence of the effective zero index in photonics. A recent highly rotating metadevice has been discovered to approach near IETC, subsequently demonstrating a cloaking effect. However, this near IETC, related to a rotating radius, is quite inhomogeneous, and the high-speed rotating motor also needs a high energy input, limiting its further applications. Herein, we propose and realize an evolution of this homogeneous zero-index thermal metadevice for robust camouflaging and super-expanding through out-of-plane modulations rather than high-speed rotation. Both the theoretical simulations and experiments verify a homogeneous IETC and the corresponding thermal functionalities beyond cloaking. The recipe for our homogeneous zero-index thermal metadevice involves an external thermostat, which can be easily adjusted for various thermal applications. Our study may provide meaningful insights into the design of powerful thermal metadevices with IETCs in a more flexible way. Full article
(This article belongs to the Special Issue Advances in Heat Transfer and Property Characterization of Nano Materials)
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18 pages, 15322 KiB  
Article
A High Temporal-Spatial Resolution Temperature Sensor for Simultaneous Measurement of Anisotropic Heat Flow
by Xuwen Luo and Haidong Wang
Materials 2022, 15(15), 5385; https://doi.org/10.3390/ma15155385 - 5 Aug 2022
Cited by 2 | Viewed by 1806
Abstract
The thermal measurement sensor applied to hypersonic vehicles requires characteristic size in the order of micrometers and characteristic time in the order of microseconds. The measurement criteria of localized detection, high temporal-spatial precision, and long-term stability cannot all be reached by current thermal [...] Read more.
The thermal measurement sensor applied to hypersonic vehicles requires characteristic size in the order of micrometers and characteristic time in the order of microseconds. The measurement criteria of localized detection, high temporal-spatial precision, and long-term stability cannot all be reached by current thermal measuring techniques. This work presents a temperature sensor with excellent temporal-spatial resolution that can measure both in-plane and out-of-plane heat flow. The sensor was made of thin platinum nano-film and an aluminum nitride ceramic sheet. The sensor was calibrated using a thermostatic vacuum chamber and used for in-plane and out-of-plane heat flow measurements. The temperature measurement accuracy of the sensor was estimated to be 0.01 K. The sensor’s resolution for measuring heat flow density is more than 500 W/m2 and its measurement uncertainty is roughly 3%. To ensure the structural stability of the device, the aluminum nitride ceramic sheet was chosen as the substrate of the thermal sensing unit, and the response time became longer due to the high thermal conductivity of aluminum nitride. The suspension platinum nano-film sensor can reach a sub-microsecond response time according to the theoretical derivation. Experimental results of pneumatic thermal effects of high-temperature flames using the sensor prove that the designed sensor has good sensitivity and accuracy. Full article
(This article belongs to the Special Issue Advances in Heat Transfer and Property Characterization of Nano Materials)
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