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Nanomaterials
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Thermal Properties of Nanomaterials: Fundamentals and Applications
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Thermal Properties of Nanomaterials: Fundamentals and Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 6563

Special Issue Editors

Dr. Mohd Faizul Mohd Sabri

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Guest Editor
Department of Mechanical Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
Interests: nanomaterials; thermoelectric; MEMS; energy materials; electronic materials
Prof. Dr. Md Abdul Maleque

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Guest Editor
Advanced Materials & Surface Engg. Research Unit, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia
Interests: sustainable composite materials; nano-coating technology; thermal properties of materials; materials development and characterization; nanoparticles
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nanomaterials research and development has been the catalyst for significant findings in a wide range of technologies, from pharmaceuticals to building materials to molecular electronics. It continues to be explored in terms of fundamental studies and applications in various scientific and technological fields. The wide scope of nanomaterials research ranges from development of new classes of materials, to manipulation of elements at atomic scales, to synthesis and characterization, and applications. Thus, this Special Issue focuses on “Thermal Properties of Nanomaterials: Fundamentals and Applications” in order to provide a dedicated platform to put forward recent ideas and findings in this particular area of research. Nanostructures play an important role in determining the physical properties of materials, including thermal properties such as thermal conductivity, melting point, heat capacity, etc. The scope of this Special Issue will cover the fundamentals, materials development, synthesis and applications relevant to nanomaterials with regards to its thermal properties.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  1. Simulation and theoretical studies;
  2. Low dimensional nanomaterials;
  3. Nanoparticles and nanofluids;
  4. Materials development and characterization;
  5. Heat transfer applications;
  6. Insulation applications;
  7. Energy applications;
  8. Structural applications.

We look forward to receiving your contributions.

Dr. Mohd Faizul Mohd Sabri
Prof. Dr. Md Abdul Maleque
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. Nanomaterials 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 2900 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

  • Thermal properties
  • Thermal conductivity
  • Nanoparticles
  • Thermal resistance
  • Specific heat capacity
  • Insulation
  • Thermal diffusivity
  • Nanofluids
  • Melting point

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Published Papers (5 papers)

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Research

17 pages, 4466 KiB  
Article
Time-Dependent Flow of Water-Based CoFe2O4-Mn-ZnFe2O4 Nanoparticles over a Shrinking Sheet with Mass Transfer Effect in Porous Media
by Iskandar Waini, Umair Khan, Aurang Zaib, Anuar Ishak, Ioan Pop and Nevzat Akkurt
Nanomaterials 2022, 12(22), 4102; https://doi.org/10.3390/nano12224102 - 21 Nov 2022
Cited by 3 | Viewed by 1461
Abstract
The use of hybrid nanoparticles to increase heat transfer is a favorable area of research, and therefore, numerous scientists, researchers, and scholars have expressed their appreciation for and interest in this field. Determining the dynamic role of nanofluids in the cooling of microscopic [...] Read more.
The use of hybrid nanoparticles to increase heat transfer is a favorable area of research, and therefore, numerous scientists, researchers, and scholars have expressed their appreciation for and interest in this field. Determining the dynamic role of nanofluids in the cooling of microscopic electronic gadgets, such as microchips and related devices, is also one of the fundamental tasks. With such interesting and useful applications of hybrid nanofluids in mind, the main objective is to deal with the analysis of the unsteady flow towards a shrinking sheet in a water-based hybrid ferrite nanoparticle in porous media, with heat sink/source effects. Moreover, the impact of these parameters on heat and mass transfers is also reported. Numerical results are obtained using MATLAB software. Non-unique solutions are determined for a certain shrinking strength, in addition to the unsteadiness parameter. The mass transfer and friction factor increase for the first solution due to the hybrid nanoparticles, but the heat transfer rate shows the opposite effect. Full article
(This article belongs to the Special Issue Thermal Properties of Nanomaterials: Fundamentals and Applications)
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16 pages, 2239 KiB  
Article
Response Surface Methodology (RSM) on the Hybrid Nanofluid Flow Subject to a Vertical and Permeable Wedge
by Najiyah Safwa Khashi’ie, Iskandar Waini, Mohd Fariduddin Mukhtar, Nurul Amira Zainal, Khairum Bin Hamzah, Norihan Md Arifin and Ioan Pop
Nanomaterials 2022, 12(22), 4016; https://doi.org/10.3390/nano12224016 - 15 Nov 2022
Cited by 11 | Viewed by 1626
Abstract
The mixed convection flow with thermal characteristics of a water-based Cu-Al2O3 hybrid nanofluid towards a vertical and permeable wedge was numerically and statistically analyzed in this study. The governing model was constructed using physical and theoretical assumptions, which were then [...] Read more.
The mixed convection flow with thermal characteristics of a water-based Cu-Al2O3 hybrid nanofluid towards a vertical and permeable wedge was numerically and statistically analyzed in this study. The governing model was constructed using physical and theoretical assumptions, which were then reduced to a set of ordinary differential equations (ODEs) using similarity transformation. The steady flow solutions were computed using the Matlab software bvp4c. All possible solutions were presented in the graphs of skin friction coefficient and thermal rate. The numerical results show that the flow and thermal progresses are developed by enhancing the controlling parameters (wedge parameter, volumetric concentration of nanoparticles, and suction parameter). Moreover, the response surface methodology (RSM) with analysis of variance (ANOVA) was employed for the statistical evaluation and conducted using the fit general linear model in the Minitab software. From the standpoint of statistical analysis, the wedge parameter and volumetric nanoparticle concentration have a considerable impact on all responses; however, the suction parameter effect is only substantial for a single response. Full article
(This article belongs to the Special Issue Thermal Properties of Nanomaterials: Fundamentals and Applications)
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14 pages, 2806 KiB  
Article
Nanostructured AlGaAsSb Materials for Thermophotovoltaic Solar Cells Applications
by Djamel Bensenouci, Boualem Merabet, Osman M. Ozkendir and Md A. Maleque
Nanomaterials 2022, 12(19), 3486; https://doi.org/10.3390/nano12193486 - 5 Oct 2022
Cited by 1 | Viewed by 1645
Abstract
Thermophotovoltaic conversion using heat to generate electricity in photovoltaic cells based on the detraction of thermal radiation suffers from many engineering challenges. The focus of this paper is to study the nanostructure of AlGaAsSb for thermophotovoltaic energy conversion using lattice-matched heterostructures of GaSb-based [...] Read more.
Thermophotovoltaic conversion using heat to generate electricity in photovoltaic cells based on the detraction of thermal radiation suffers from many engineering challenges. The focus of this paper is to study the nanostructure of AlGaAsSb for thermophotovoltaic energy conversion using lattice-matched heterostructures of GaSb-based materials in order to overcome the current challenges. The XAFS spectroscopy technique was used to analyze electronic structures and optical properties of GaSb, (Al, In) GaSbAs. The XAFS spectroscopy analysis showed a powerful decay at peak intensity that reveals to be related to a loss in Sb amount and light As atoms replaced in Sb atoms by 25%. Moreover, it was found that Al/In doped samples have highly symmetric data features (same atomic species substitution). The narrow direct bandgap energy, Eg of Al0.125Ga0.875Sb0.75As0.25 material raised (0.4–0.6 eV) compared to conventional photovoltaic cell bandgap energy (which is generally less than 0.4 eV) with weak absorption coefficients. The thermoelectric properties of AlGaAsSb computed via Botlztrap code showed that the electrons made up the majority of the charge carriers in AlGaAsSb. This nanostructure material exhibited a higher and acceptable figure of merit and demonstrated a promising thermoelectric material for solar thermophotovoltaic applications. Full article
(This article belongs to the Special Issue Thermal Properties of Nanomaterials: Fundamentals and Applications)
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20 pages, 11348 KiB  
Article
Thermal and Rheological Characterization of Aqueous Nanofluids Based on Reduced Graphene Oxide (rGO) with Manganese Dioxide Nanocomposites (MnO2)
by Felipe Lozano-Steinmetz, María Paz Ramírez-Navarro, Leonardo Vivas, Diego A. Vasco, Dinesh Pratap Singh and Carlos Zambra-Sazo
Nanomaterials 2022, 12(17), 3042; https://doi.org/10.3390/nano12173042 - 1 Sep 2022
Cited by 3 | Viewed by 1967
Abstract
Nanofluids have become of interest in recent years thanks to their improved thermal properties, which make them especially interesting for microchannel heat sink applications. In this study, we prepared two aqueous nanofluids based on reduced graphene oxide (rGO) decorated with manganese dioxide (MnO [...] Read more.
Nanofluids have become of interest in recent years thanks to their improved thermal properties, which make them especially interesting for microchannel heat sink applications. In this study, we prepared two aqueous nanofluids based on reduced graphene oxide (rGO) decorated with manganese dioxide (MnO2) at a concentration of 0.1 wt.%. The difference between the two nanofluids was in the preparation of the reduced graphene oxide decorated with MnO2. In the first case, the manganese salt was mixed with ascorbic acid before GO reduction with NaOH, and in the second case, the GO reduction with NaOH occurred under ascorbic acid. Ascorbic acid not only plays the role of a non-toxic and ecofriendly reducing agent but also acts as an important parameter to control the reaction kinetics. The structural, microstructural and spectral characterizations of the MnO2/rGO nanocomposite were conducted via X-ray diffractometry (XRD), Raman spectroscopy, FT-IR, TEM, SEM and EDS analyses. Moreover, the synthesized MnO2/rGO nanocomposites were utilized as nanofluids and their stability, thermal conductivity and rheological behaviors were studied. The thermal conductivity of the MnO2/rGO and MnO2AsA/rGO nanofluids was 17% and 14.8% higher than that of water for the average temperature range, respectively, but their viscosity remained statistically equal to that of water. Moreover, both nanofluids presented Newtonian behavior in the analyzed shear rate range. Therefore, both MnO2/rGO and MnO2AsA/rGO nanofluids are promising alternatives for use in applications with micro- and millichannel heat sinks. Full article
(This article belongs to the Special Issue Thermal Properties of Nanomaterials: Fundamentals and Applications)
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23 pages, 7287 KiB  
Article
Rheological and Thermal Conductivity Study of Two-Dimensional Molybdenum Disulfide-Based Ethylene Glycol Nanofluids for Heat Transfer Applications
by Syed Nadeem Abbas Shah, Syed Shahabuddin, Mohammad Khalid, Mohd Faizul Mohd Sabri, Mohd Faiz Mohd Salleh, Norazilawati Muhamad Sarih and Saidur Rahman
Nanomaterials 2022, 12(6), 1021; https://doi.org/10.3390/nano12061021 - 21 Mar 2022
Cited by 7 | Viewed by 2552
Abstract
The rheological behavior of two-dimensional (2D) MoS2-based ethylene glycol (EG) nanofluids (NFs) was investigated at low volume concentrations (0.005%, 0.0075%, and 0.01%) in a wide temperature range of 0–70 °C and at atmospheric pressure. A conventional two-step method was followed to [...] Read more.
The rheological behavior of two-dimensional (2D) MoS2-based ethylene glycol (EG) nanofluids (NFs) was investigated at low volume concentrations (0.005%, 0.0075%, and 0.01%) in a wide temperature range of 0–70 °C and at atmospheric pressure. A conventional two-step method was followed to prepare NFs at desired volume concentrations. Based on the control rotational (0.1–1000 s−1 shear rate) and oscillation (0.01–1000% strain) methods, the viscoelastic flow curves and thixotropic (3ITT (three interval thixotropic) and hysteresis loop) characteristics of NFs were examined. Shear flow behavior revealed a remarkable reduction (1.3~14.7%) in apparent dynamic viscosity, which showed concentration and temperature dependency. Such remarkable viscosity results were assigned to the change in activation energy of the ethylene glycol with the addition of MoS2. However, the nanofluids exhibited Newtonian behavior at all temperatures for concentrations below 0.01% between 10 and 1000 s−1. On the other hand, strain sweep (@1Hz) indicated the viscoelastic nature of NFs with yielding, which varied with concentration and temperature. Besides, 3ITT and hysteresis loop analysis was evident of non-thixotropic behavior of NFs. Among all tested concentrations, 0.005% outperformed at almost all targeted temperatures. At the same time, ~11% improvement in thermal conductivity can be considered advantageous on top of the improved rheological properties. In addition, viscosity enhancement and reduction mechanisms were also discussed. Full article
(This article belongs to the Special Issue Thermal Properties of Nanomaterials: Fundamentals and Applications)
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