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Coatings
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Self-Organized Templates for Lithography Free Hybrid Multifunctional Coatings
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Self-Organized Templates for Lithography Free Hybrid Multifunctional Coatings

A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 6195

Special Issue Editor

Dr. Juris Prikulis

E-Mail Website
Guest Editor
Institute of Chemical Physics, University of Latvia, 19 Raina Blvd., LV-1586 Riga, Latvia
Interests: plasmonics; optics; nano-optics; surface plasmons; materials science; electromagnetism; solid state physics; nanophotonics; surface plasmon resonance; optics and photonics

Special Issue Information

Dear Colleagues,

Surface layers with self-organized nanoscale structure can serve as templates for the deposition of different materials, creating new hybrid systems that can express multiple physical phenomena and simultaneously provide several useful functions. An example of such materials is porous anodic aluminum oxide (AAO) coated with metal layers, which supports structural and plasmonic modes while pores can host specific materials with tunable properties for color displays and other applications. Another example is the use of colloidal crystals as templates for deposition of other nanoparticles.

Besides the ability to overcome the limitations of software-controlled lithography, the role of ordering achieved by self-organization is enhancement or suppression of observable physical properties by creation of collectively resonant modes—optical, electronic, or mechanical.

The goal of this Special Issue is to collect the newest ideas on lithography-free processes for the synthesis of multifunctional hybrid coatings that use several levels of self-ordering, e.g., colloidal nanoparticle self-assembly on self-organized surfaces. The multiple functionality may include, but is not limited to, optical, plasmonic, photovoltaic, catalytic, self-cleaning, protective, and other useful properties in the same hybrid coating. A further function example is programmed self-disassembly, where, upon interaction with certain external stimuli, the hybrid structure can be disintegrated for the recovery of valuable materials.

Reports on experimental physicochemical synthesis, characterization, and application development of self-organized hybrids are particularly welcome.

Dr. Juris Prikulis
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. Coatings 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 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

  • Colloids
  • plasmonics
  • hybrid materials
  • multilayers

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Published Papers (2 papers)

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11 pages, 3494 KiB  
Article
Visible Photoluminescence of Variable-Length Zinc Oxide Nanorods Embedded in Porous Anodic Alumina Template for Biosensor Applications
by Uldis Malinovskis, Aleksandrs Dutovs, Raimonds Poplausks, Daniels Jevdokimovs, Octavio Graniel, Mikhael Bechelany, Indrikis Muiznieks, Donats Erts and Juris Prikulis
Coatings 2021, 11(7), 756; https://doi.org/10.3390/coatings11070756 - 24 Jun 2021
Cited by 7 | Viewed by 2973
Abstract
Zinc oxide (ZnO) and porous anodic aluminum oxide (PAAO) are technologically important materials, rich with features that are of interest in optical applications, for example, in light-emitting and sensing devices. Here, we present synthesis method of aligned ZnO nanorods (NR) with 40 nm [...] Read more.
Zinc oxide (ZnO) and porous anodic aluminum oxide (PAAO) are technologically important materials, rich with features that are of interest in optical applications, for example, in light-emitting and sensing devices. Here, we present synthesis method of aligned ZnO nanorods (NR) with 40 nm diameter and variable length in 150 to 500 nm range obtained by atomic layer deposition (ALD) of ZnO in pores of continuously variable thickness PAAO. The relative intensity of yellow (1.99 eV), green (2.35 eV), and blue (2.82 eV) photoluminescence (PL) components originating from the different types of defects, varied with non-monotonic dependency on the composite film thickness with a Fabry–Pérot like modulation. The intensity variation of any individual PL component correlated well with anti-reflective properties of ZnO NR–PAAO composite film at the peak wavelength of the particular PL component. This provides a route for selective enhancement or suppression of color components of hybrid fluorescent emitters by tuning only geometric parameters, with potential use in imaging and other optical devices. As an application example we tested the composite film for sensing of vascular endothelial growth factor (VEGF) using a widely accessible fluorescence microscopy setup. The intensity of the yellow and green PL components reduced in response to increased VEGF concentrations, whereas blue component remained invariant. Full article
(This article belongs to the Special Issue Self-Organized Templates for Lithography Free Hybrid Multifunctional Coatings)
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10 pages, 3735 KiB  
Article
Tailoring Mesoporous Silicon Surface to Form a Versatile Template for Nanoparticle Deposition
by Nadzeya Khinevich, Mindaugas Juodėnas, Asta Tamulevičienė, Hanna Bandarenka and Sigitas Tamulevičius
Coatings 2021, 11(6), 699; https://doi.org/10.3390/coatings11060699 - 10 Jun 2021
Cited by 4 | Viewed by 2447
Abstract
Porous silicon (PS) can be used as a loading template in sensing or as a matrix to develop nanoparticle arrays. We present a comprehensive study of PS morphology and optical properties before and after the pore opening process, including the determination of thickness, [...] Read more.
Porous silicon (PS) can be used as a loading template in sensing or as a matrix to develop nanoparticle arrays. We present a comprehensive study of PS morphology and optical properties before and after the pore opening process, including the determination of thickness, pore size, and pore density of PS layers, its surface wettability, and reflectivity. The PS samples were fabricated by electrochemical anodization of monocrystalline silicon wafer in 5–20 wt.% hydrofluoric acid (HF) solution at a current density in the range of 20–200 mA/cm2. Anodization was followed by the pore opening process, i.e., the removal of a parasitic superficial layer with a “bottleneck” structure by reactive ion etching (RIE). The results illustrate that “bottleneck”-free PS allows to achieve a high pore density using a low HF concentration and a reduced current density. We established that this structure demonstrates higher hydrophobicity in comparison to the samples before RIE. The applicability of the developed “bottleneck”-free PS was tested via filling the pores with silver nanoparticles, indicating its potential use as a template for the fabrication of nanoparticle arrays. Full article
(This article belongs to the Special Issue Self-Organized Templates for Lithography Free Hybrid Multifunctional Coatings)
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