Special Issue "Thermal and Mechanical Dynamics in Nanosystems"

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Theory and Simulation of Nanostructures".

Deadline for manuscript submissions: 20 December 2020.

Special Issue Editors

Prof. Dr. Francesco Banfi
Website
Guest Editor
Universitė de Lyon, Institut Lumière Matière (iLM), Université Lyon 1 and CNRS, France
Interests: ultrafast energy transfer at the nanoscale; ultrafast thermomechanics; nanoscale heat transfer; mechanical nanometrology; ultrafast optics
Prof. Dr. Claudio Melis
Website
Guest Editor
Universita’ degli studi di Cagliari, Department of Physics, Cagliari, Italy
Interests: nanoscale thermal transport; anomalous heat transport in low dimensions; polymer-based hybrids for thermoelectrics and photovoltaics; atomistic simulations (classical molecular dynamics, density functional theory); Thermal properties of 2-dimensional atomic sheets
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Thermal and mechanical dynamics in nanosystems is a boosting research field at the forefront of physics, material science and engineering, embracing both fundamental and technological aspects. When the relevant dimensions are scaled to the sub-μm length-scale the thermal and mechanical dynamics may significantly deviate from the ones typically found at the macro-scale. Whatever the application, accessing the thermal and mechanical dynamics in nanosystems is of paramount importance in view of further devices downscaling and will pave the way to novel paradigms in heat management and device schemes.

We seek for contribution covering recent progress on fundamental aspects, applications and the developments of metrology tools relevant to the thermal and mechanical dynamics of nanosystems at the nanoscale at large. Experimental and theoretical contributions are equally encouraged. Both original research articles, in the form of full papers or communications, and reviews are welcome.

This special issue is intended to cover a broad range of subjects. A non-exhaustive list of topics includes:

  1. Heat transport regimes peculiar to the nanoscale (ballistic, wave-like regime, etc) involving any energy carriers (phonons, electrons, photons, excitations, etc.);
  2. Material design and device schemes involving the nano and meso-scale (including meta-materials) aimed at novel thermal management strategies, sensing schemes, improved thermal and mechanical properties and functionalities involving the thermal and mechanical dynamics at large;
  3. Nanomechanics and nanothermics of nano-objects, phononic superlattices, granular materialas, 2D materials, nano-patterned devices, phase changed materials;
  4. Innovative tools for mechanical and thermal nanometrology;
  5. Novel simulation protocols and methods;
  6. Theoretical methods for phonon dispersion and phonon transport;
  7. Nanoscale heat transfer around nanoparticles for biomedical applications;
  8. Systems of discontinuous (granular and porous) matter: elastic behavior and thermal conduction properties;

Prof. Dr. Francesco Banfi
Prof. Dr. Claudio Melis
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 papers will be 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 monthly 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 2000 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.

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Open AccessArticle
Manufacturing of Conductive, Wear-Resistant Nanoreinforced Cu-Ti Alloys Using Partially Oxidized Electrolytic Copper Powder
Nanomaterials 2020, 10(7), 1261; https://doi.org/10.3390/nano10071261 - 28 Jun 2020
Cited by 1
Abstract
Reactive powder composites Cu-(0–15%)TiH2 containing up to 5% native Cu2O were manufactured by high energy ball milling and then hot-pressed to produce bulk nanostructured copper–matrix alloys reinforced by Cu3Ti3O inclusions. Two high-energy ball-milling (HEBM) protocols were [...] Read more.
Reactive powder composites Cu-(0–15%)TiH2 containing up to 5% native Cu2O were manufactured by high energy ball milling and then hot-pressed to produce bulk nanostructured copper–matrix alloys reinforced by Cu3Ti3O inclusions. Two high-energy ball-milling (HEBM) protocols were employed for the fabrication of Cu-Ti alloys: single-stage and two-stage ball milling, resulting in an order of magnitude refinement of TiH2 particles in the reactive mixtures. Single-stage HEBM processing led to the partial retention of Ti in the microstructure of hot-pressed specimens as the α-Ti phase and formation of fine-grained (100–200 nm) copper matrix interspersed with 5–20 nm Cu3Ti3O precipitates, whereas the two-stage HEBM led to the complete conversion of TiH2 into the Cu3Ti3O phase during the hot pressing but produced a coarser copper matrix (1–2 μm) with 0.1–0.2 μm wide polycrystalline Cu3Ti3O layers on the boundaries of Cu grains. The alloy produced using single-stage HEBM was characterized by the highest strength (up to 950 MPa) and electrical conductivity (2.6 × 107 Sm/m) as well as the lowest specific wear rate (1.1 × 10−5 mm3/N/m). The tribological performance of the alloy was enhanced by the formation of Cu3Ti3O microfibers in the wear debris, which reduced the friction coefficient against the Al2O3 counter-body. The potential applications of the developed alloys are briefly discussed. Full article
(This article belongs to the Special Issue Thermal and Mechanical Dynamics in Nanosystems)
Show Figures

Figure 1

Open AccessArticle
Anisotropic Thermal Conductivity in Few-Layer and Bulk Titanium Trisulphide from First Principles
Nanomaterials 2020, 10(4), 704; https://doi.org/10.3390/nano10040704 - 08 Apr 2020
Cited by 2
Abstract
We study the thermal conductivity of monolayer, bilayer, and bulk titanium trisulphide (TiS 3 ) by means of an iterative solution of the Boltzmann transport equation based on ab-initio force constants. Our results show that the thermal conductivity of these layers is anisotropic [...] Read more.
We study the thermal conductivity of monolayer, bilayer, and bulk titanium trisulphide (TiS 3 ) by means of an iterative solution of the Boltzmann transport equation based on ab-initio force constants. Our results show that the thermal conductivity of these layers is anisotropic and highlight the importance of enforcing the fundamental symmetries in order to accurately describe the quadratic dispersion of the flexural phonon branch near the center of the Brillouin zone. Full article
(This article belongs to the Special Issue Thermal and Mechanical Dynamics in Nanosystems)
Show Figures

Figure 1

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Mechanical properties of nanoporous metallic thin film: a paradigmatic case
Authors: Giulio Benetti1,2, Francesco Banfi3, Emanuele Cavaliere1, and Luca Gavioli1,3,*
Affiliation: 1 Interdisciplinary Laboratories for Advanced Materials Physics (i-LAMP) and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Via Musei 41, 25121 Brescia, Italy. 2 Department of Pathology and Diagnostics – Medical Physics Unit, University Hospital of Verona, P.le Stefani 1, 37126 Verona, Italy 3 Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière, F-69622 Villeurbanne, France
Abstract: Nanoporous metallic thin films are a widely studied platform with applications in electrochemistry, energy storage, gas sensing, supercapacitors. Among the physical characteristics, knowledge of their morphology and mechanical parameters is of paramount importance in view of any perspective application. Despite the technological relevance, information on the topics are spread across a range of disparate fields and are often system specific. This review addresses the topic starting from the paradigmatic case of granular metallic thin films synthesized by gas-phase methods. The peculiarities of the deposition method allow to obtain solvent free and ultrapure nanoporous films at room temperature, avoiding the synthesis-related complicacy deriving from other methods, thus providing ideal model systems. We here review the mechanics of these paradigmatic nanoporous thin films, merging information from bottom-up (TEM, SEM, Molecular Dynamics, BET) and top-down (ultrafast photoacoustics, x-ray diffraction techniques, photoemission spectroscopy, ellipsometry) approaches. Several applications, specific to their morphological and mechanical properties, will be also reviewed, encompassing, for instance, bendable electronics, membrane for gas separation and SERS. Future directions in the field will also be addressed.

Title: Time domain investigations of coherent phonons in van der Waals thin films
Authors: Fabien Vialla1,*, and Natalia Del Fatti1
Affiliation: Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5306, Institut Lumière Matière, F-69622 Villeurbanne, France
Abstract: Coherent phonons can be launched in materials upon localized pulsed optical excitation, and be subsequently followed in time domain, with a sub-picosecond resolution, using a time delayed pulsed probe. This technique yields characterization of mechanical, optical, and electronic properties at the nanoscale, and is taken advantage of for investigations in material science, physics, chemistry, and biology. Here we review the use of this experimental method applied to the emerging field of homo- and heterostructures of van der Waals materials. Their unique structure corresponding to non-covalently stacked atomically thin layers allows for the study of original structural configurations, down to one atom thin films free of interface defect. The generation and relaxation of coherent optical phonons, as well as propagative and resonant breathing acoustic phonons are comprehensively discussed. This approach opens new avenues for the in-situ characterization of these novel materials, the observation and modulation of exotic phenomena, and advances in the field of acoustics microscopy.

Back to TopTop