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Properties and Applications of Individuals and Ensembles of 1D Nanostructures
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Properties and Applications of Individuals and Ensembles of 1D Nanostructures

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (31 December 2019) | Viewed by 9418

Special Issue Editor

Prof. Dr. David N. McIlroy

E-Mail Website
Guest Editor
Department of Physics, Oklahoma State University, 145 Physical Sciences II, Stillwater, OK 74078-3072, USA
Interests: heirarchical nanomaterials; neuromorphic materials; sensors; photonics; electronic transport in 1D nanostructures; catalysis; surface science
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

One-dimensional nanostructures embrace the best of both nanoparticles and thin films, where they have a large surface area (much like nanoparticles) and are readily integrated into electrical circuits (much like thin films). Consequently, their technological applications are virtually limitless. Furthermore, one has the option of constructing devices with a single 1D nanostructure or utilizing an ensemble of self-assembled 1D nanostructures, in which the two options exhibit their own suite of phenomena. In addition, 1-D nanostructures come in a variety of morphologies ranging from hollow to helical, which one can view as a design parameter, as well as flavors—metallic, semiconducting, and insulating. Lastly, they lend themselves to the construction of hierarchical structures consisting of multilayer thin conformal coatings, integration with nanoparticles, and chemical and biofunctionalization, to name a few. This Special Issue strives to create a collection of innovative research on the fundamental properties of 1D nanostructures, including electronic, optical, and magnetic, etc., and their applications in electronic devices and sensors, optoelectronics, plasmonics, biomaterials, etc. This Special Issue promotes innovation by publishing basic and applied research on 1D nanostructures side by side.

Prof. Dr. David N. McIlroy
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. 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

  • one-dimensional nanostructures
  • heirarchical nanostructures
  • nanowires
  • nanotubes

Published Papers (3 papers)

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Research

11 pages, 1833 KiB  
Article
Electrophoretic Deposition of Layer-by-Layer Unsheathed Carbon Nanotubes—A Step Towards Steerable Surface Roughness and Wettability
by Emil Korczeniewski, Monika Zięba, Wojciech Zięba, Anna Kolanowska, Paulina Bolibok, Piotr Kowalczyk, Agata Wiertel-Pochopień, Jan Zawała, Sławomir Boncel and Artur P. Terzyk
Materials 2020, 13(3), 595; https://doi.org/10.3390/ma13030595 - 28 Jan 2020
Cited by 6 | Viewed by 2545
Abstract
It is well known that carbon nanotube (CNT) oxidation (usually with concentrated HNO3) is a major step before the electrophoretic deposition (EPD). However, the recent discovery of the “onion effect” proves that multiwalled carbon nanotubes are not only oxidized, but a [...] Read more.
It is well known that carbon nanotube (CNT) oxidation (usually with concentrated HNO3) is a major step before the electrophoretic deposition (EPD). However, the recent discovery of the “onion effect” proves that multiwalled carbon nanotubes are not only oxidized, but a simultaneous unsheathing process occurs. We present the first report concerning the influence of unsheathing on the properties of the thus-formed CNT surface layer. In our study we examine how the process of gradual oxidation/unsheathing of a series of multiwalled carbon nanotubes (MWCNTs) influences the morphology of the surface formed via EPD. Taking a series of well-characterized and gradually oxidized/unsheathing Nanocyl™ MWCNTs and performing EPD on a carbon fiber surface, we analyzed the morphology and wettability of the CNT surfaces. Our results show that the water contact angle could be gradually changed in a wide range (125–163°) and the major property determining its value was the diameter of aggregates formed before the deposition process in the solvent. Based on the obtained results we determined the parameters having a crucial influence on the morphology of created layers. Our results shed new light on the deposition mechanism and enable the preparation of surfaces with steerable roughness and wettability. Full article
(This article belongs to the Special Issue Properties and Applications of Individuals and Ensembles of 1D Nanostructures)
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13 pages, 5100 KiB  
Article
Anti-Biofouling and Desalination Properties of Thin Film Composite Reverse Osmosis Membranes Modified with Copper and Iron Nanoparticles
by M. Armendariz Ontiveros, Y. Quintero, A. Llanquilef, M. Morel, L. Argentel Martínez, A. García García and A. Garcia
Materials 2019, 12(13), 2081; https://doi.org/10.3390/ma12132081 - 28 Jun 2019
Cited by 27 | Viewed by 3707
Abstract
The anti-biofouling and desalination properties of thin film composite reverse osmosis membranes (TFC-RO), modified by the incorporation of copper and iron nanoparticles, were compared. Nanoparticles of metallic copper (CuNPs) and an iron crystalline phase mix (Fe and Fe2O3, FeNPs) [...] Read more.
The anti-biofouling and desalination properties of thin film composite reverse osmosis membranes (TFC-RO), modified by the incorporation of copper and iron nanoparticles, were compared. Nanoparticles of metallic copper (CuNPs) and an iron crystalline phase mix (Fe and Fe2O3, FeNPs) were obtained by oxide-reduction-precipitation and reduction reactions, respectively, and characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques. Modified membranes (PA+0.25Cu-PSL and PA+0.25Fe-PSL) were obtained by incorporating these nanoparticles during the interfacial polymerization process (PI). These membranes were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), and contact angle measurements. Bactericidal tests by a Colony Forming Unit (CFU) were performed using Escherichia coli, and anti-adhesion properties were confirmed by fluorescence microscopy estimating the percentage of live/dead cells. The permeate flow and rejection of salts was evaluated using a crossflow cell. An increase of the membrane’s roughness on the modified membrane was observed, influencing the desalination performance more strongly in the presence of the FeNPs with respect to the CuNPs. Moreover, a significant bactericidal and anti-adhesion effect was obtained in presence of both modifications with respect to the pristine membrane. An important decrease in CFU in the presence of modified membranes of around 98% in both modifications was observed. However, the anti-adhesion percentage and reduction of live/dead cells were higher in the presence of the copper-modified membrane in comparison to the iron-modified membrane. These facts were attributed to the differences in antimicrobial action mechanism of these types of nanoparticles. In conclusion, TFC-RO membranes modified by the incorporation of CuNPs during PI represent one alternative material to attend to the biofouling impact in the desalination process. Full article
(This article belongs to the Special Issue Properties and Applications of Individuals and Ensembles of 1D Nanostructures)
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15 pages, 9653 KiB  
Article
Alumina Coated Silica Nanosprings (NS) Support Based Cobalt Catalysts for Liquid Hydrocarbon Fuel Production From Syngas
by Abdulbaset Alayat, Elena Echeverria, Farid Sotoudehniakarani, David N. Mcllroy and Armando G. McDonald
Materials 2019, 12(11), 1810; https://doi.org/10.3390/ma12111810 - 04 Jun 2019
Cited by 11 | Viewed by 2623
Abstract
The effects of Al2O3 coating on the performance of silica nanospring (NS) supported Co catalysts for Fischer–Tropsch synthesis (FTS) were evaluated in a quartz fixed-bed microreactor. The Co/NS-Al2O3 catalysts were synthesized by coating the Co/NS and NS [...] Read more.
The effects of Al2O3 coating on the performance of silica nanospring (NS) supported Co catalysts for Fischer–Tropsch synthesis (FTS) were evaluated in a quartz fixed-bed microreactor. The Co/NS-Al2O3 catalysts were synthesized by coating the Co/NS and NS with Al2O3 by an alkoxide-based sol-gel method (NS-Al-A and NS-Al-B, respectively) and then by decorating them with Co. Co deposition was via an impregnation method. Catalysts were characterized before the FTS reaction by the Brunauer–Emmett–Teller (BET) method, X-ray diffraction, transmission electron microscopy, temperature programmed reduction, X-ray photoelectron spectroscopy, differential thermal analysis and thermogravimetric analysis in order to find correlations between physico-chemical properties of catalysts and catalytic performance. The products of the FTS were trapped and analyzed by GC-TCD and GC-MS to determine the CO conversion and reaction selectivity. The Al2O3 coated NS catalyst had a significant affect in FTS activity and selectivity in both Co/NS-Al2O3 catalysts. A high CO conversion (82.4%) and Σ > C6 (86.3%) yield were obtained on the Co/NS-Al-B catalyst, whereas the CO conversion was 62.8% and Σ > C6 was 58.5% on the Co/NS-Al-A catalyst under the same FTS experimental condition. The Co/NS-Al-A catalyst yielded the aromatic selectivity of 10.2% and oxygenated compounds. Full article
(This article belongs to the Special Issue Properties and Applications of Individuals and Ensembles of 1D Nanostructures)
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