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Nanomaterials
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Laser Induced Nanomaterials
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Laser Induced Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: closed (31 October 2019) | Viewed by 26725

Special Issue Editor

Prof. Dr. Noel Rodriguez

E-Mail Website
Guest Editor
Department of Electronics and Computer Technology, University of Granada, 18071 Granada, Spain
Interests: nanotechnology; sensors; electrical characterization; nanoelectronics; laser-induced nanomaterials; energy harvesting; energy conversion; flexible electronics; memristive devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The use of nanomaterials is revolutionizing science and technology in this century, improving and adding new functionalities in multiple fields, such as sensing, energy storage, electronics, biotechnology, or optics. There are numerous procedures for their fabrication, but successful industrial implementation is always connected to a cost-effective and reproducible production of the raw nanomaterials and devices. The use of lasers for their synthesis and lithography has been identified as one of the more flexible approaches to meet these premises.

This Special Issue of Nanomaterials, “Laser-Induced Nanomaterials”, aims at collecting a compilation of the most recent progress and new developments in the application of lasers for the production of nanomaterials. It focuses on the synthesis, properties, and prospective applications. The topics cover a wide range of research fields and full papers, communications, and reviews are welcomed. Potential topics include, but are not limited to:

  • Laser-reduced graphene oxide;
  • Laser-induced nanographene aggregates;
  • Chemical deposition induced by laser;
  • Laser-induced thermocapillarity;
  • Laser-assisted formation of nanoparticles;
  • Modelling and simulation of laser-induced nanomaterials;
  • Laser-induced nanomaterials applications.

Prof. Noel Rodriguez
Guest Editor

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

  • laser-reduced graphene oxide
  • laser-induced graphene
  • characterization
  • nanotechnology
  • surface modification
  • sensor
  • porous graphene

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Published Papers (4 papers)

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Research

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21 pages, 7753 KiB  
Article
Pulsed Laser Deposition of Nanostructured MoS3/np-Mo//WO3−y Hybrid Catalyst for Enhanced (Photo) Electrochemical Hydrogen Evolution
by Vyacheslav Fominski, Alexey Gnedovets, Dmitry Fominski, Roman Romanov, Petr Kartsev, Oxana Rubinkovskaya and Sergey Novikov
Nanomaterials 2019, 9(10), 1395; https://doi.org/10.3390/nano9101395 - 30 Sep 2019
Cited by 11 | Viewed by 3540
Abstract
Pulsed laser ablation of MoS2 and WO3 targets at appropriate pressures of background gas (Ar, air) were used for the preparation of new hybrid nanostructured catalytic films for hydrogen production in an acid solution. The films consisted of a nanostructured WO [...] Read more.
Pulsed laser ablation of MoS2 and WO3 targets at appropriate pressures of background gas (Ar, air) were used for the preparation of new hybrid nanostructured catalytic films for hydrogen production in an acid solution. The films consisted of a nanostructured WO3−y underlayer that was covered with composite MoS3/np-Mo nanocatalyst. The use of dry air with pressures of 40 and 80 Pa allowed the formation of porous WO3−y films with cauliflower- and web-like morphology, respectively. The ablation of the MoS2 target in Ar gas at a pressure of 16 Pa resulted in the formation of amorphous MoS3 films and spherical Mo nanoparticles. The hybrid MoS3/np-Mo//WO3−y films deposited on transparent conducting substrates possessed the enhanced (photo)electrocatalytic performance in comparison with that of any pristine one (MoS3/np-Mo or WO3−y films) with the same loading. Modeling by the kinetic Monte Carlo method indicated that the change in morphology of the deposited WO3−y films could be caused by the transition of ballistic deposition to diffusion limited aggregation of structural units (atoms/clusters) under background gas pressure growth. The factors and mechanisms contributing to the enhancement of the electrocatalytic activity of hybrid nanostructured films and facilitating the effective photo-activation of hydrogen evolution in these films are considered. Full article
(This article belongs to the Special Issue Laser Induced Nanomaterials)
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12 pages, 15296 KiB  
Article
Inexpensive Graphene Oxide Heaters Lithographed by Laser
by Francisco J. Romero, Almudena Rivadeneyra, Inmaculada Ortiz-Gomez, Alfonso Salinas, Andrés Godoy, Diego P. Morales and Noel Rodriguez
Nanomaterials 2019, 9(9), 1184; https://doi.org/10.3390/nano9091184 - 21 Aug 2019
Cited by 21 | Viewed by 4664
Abstract
In this paper, we present a simple and inexpensive method for the fabrication of high-performance graphene-based heaters on different large-scale substrates through the laser photothermal reduction of graphene oxide (laser-reduced graphene-oxide, LrGO). This method allows an efficient and localized high level of reduction [...] Read more.
In this paper, we present a simple and inexpensive method for the fabrication of high-performance graphene-based heaters on different large-scale substrates through the laser photothermal reduction of graphene oxide (laser-reduced graphene-oxide, LrGO). This method allows an efficient and localized high level of reduction and therefore a good electrical conductivity of the treated films. The performance of the heaters is studied in terms of steady-state temperature, power consumption, and time response for different substrates and sizes. The results show that the LrGO heaters can achieve stable steady-state temperatures higher than 200 °C when a voltage of 15 V is applied, featuring a time constant of around 4 s and a heat transfer coefficient of ~200 °C cm2/W. These characteristics are compared with other technologies in this field, demonstrating that the fabrication approach described in this work is competitive and promising to fabricate large-scale flexible heaters with a very fast response and high steady-state temperatures in a cost-effective way. This technology can be easily combined with other fabrication methods, such as screen printing or spray-deposition, for the manufacturing of complete sensing systems where the temperature control is required to adjust functionalities or to tune sensitivity or selectivity. Full article
(This article belongs to the Special Issue Laser Induced Nanomaterials)
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13 pages, 1306 KiB  
Article
Laser-Fabricated Reduced Graphene Oxide Memristors
by Francisco J. Romero, Alejandro Toral-Lopez, Akiko Ohata, Diego P. Morales, Francisco G. Ruiz, Andres Godoy and Noel Rodriguez
Nanomaterials 2019, 9(6), 897; https://doi.org/10.3390/nano9060897 - 19 Jun 2019
Cited by 56 | Viewed by 10833
Abstract
Finding an inexpensive and scalable method for the mass production of memristors will be one of the key aspects for their implementation in end-user computing applications. Herein, we report pioneering research on the fabrication of laser-lithographed graphene oxide memristors. The devices have been [...] Read more.
Finding an inexpensive and scalable method for the mass production of memristors will be one of the key aspects for their implementation in end-user computing applications. Herein, we report pioneering research on the fabrication of laser-lithographed graphene oxide memristors. The devices have been surface-fabricated through a graphene oxide coating on a polyethylene terephthalate substrate followed by a localized laser-assisted photo-thermal partial reduction. When the laser fluence is appropriately tuned during the fabrication process, the devices present a characteristic pinched closed-loop in the current-voltage relation revealing the unique fingerprint of the memristive hysteresis. Combined structural and electrical experiments have been conducted to characterize the raw material and the devices that aim to establish a path for optimization. Electrical measurements have demonstrated a clear distinction between the resistive states, as well as stable memory performance, indicating the potential of laser-fabricated graphene oxide memristors in resistive switching applications. Full article
(This article belongs to the Special Issue Laser Induced Nanomaterials)
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Review

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73 pages, 38490 KiB  
Review
Nanostructuration of Thin Metal Films by Pulsed Laser Irradiations: A Review
by Francesco Ruffino and Maria Grazia Grimaldi
Nanomaterials 2019, 9(8), 1133; https://doi.org/10.3390/nano9081133 - 6 Aug 2019
Cited by 71 | Viewed by 6916
Abstract
Metal nanostructures are, nowadays, extensively used in applications such as catalysis, electronics, sensing, optoelectronics and others. These applications require the possibility to design and fabricate metal nanostructures directly on functional substrates, with specifically controlled shapes, sizes, structures and reduced costs. A promising route [...] Read more.
Metal nanostructures are, nowadays, extensively used in applications such as catalysis, electronics, sensing, optoelectronics and others. These applications require the possibility to design and fabricate metal nanostructures directly on functional substrates, with specifically controlled shapes, sizes, structures and reduced costs. A promising route towards the controlled fabrication of surface-supported metal nanostructures is the processing of substrate-deposited thin metal films by fast and ultrafast pulsed lasers. In fact, the processes occurring for laser-irradiated metal films (melting, ablation, deformation) can be exploited and controlled on the nanoscale to produce metal nanostructures with the desired shape, size, and surface order. The present paper aims to overview the results concerning the use of fast and ultrafast laser-based fabrication methodologies to obtain metal nanostructures on surfaces from the processing of deposited metal films. The paper aims to focus on the correlation between the process parameter, physical parameters and the morphological/structural properties of the obtained nanostructures. We begin with a review of the basic concepts on the laser-metal films interaction to clarify the main laser, metal film, and substrate parameters governing the metal film evolution under the laser irradiation. The review then aims to provide a comprehensive schematization of some notable classes of metal nanostructures which can be fabricated and establishes general frameworks connecting the processes parameters to the characteristics of the nanostructures. To simplify the discussion, the laser types under considerations are classified into three classes on the basis of the range of the pulse duration: nanosecond-, picosecond-, femtosecond-pulsed lasers. These lasers induce different structuring mechanisms for an irradiated metal film. By discussing these mechanisms, the basic formation processes of micro- and nano-structures is illustrated and justified. A short discussion on the notable applications for the produced metal nanostructures is carried out so as to outline the strengths of the laser-based fabrication processes. Finally, the review shows the innovative contributions that can be proposed in this research field by illustrating the challenges and perspectives. Full article
(This article belongs to the Special Issue Laser Induced Nanomaterials)
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