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Applied Sciences
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Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials
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Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: closed (15 October 2021) | Viewed by 12553

Special Issue Editors

Prof. Dr. Vladimir M. Fomin

E-Mail Website
Guest Editor
Institute for Integrative Nanosciences (IIN), Leibniz Institute for Solid State and Materials Research (IFW) Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany
Interests: nanophysics; quantum rings; optical properties of quantum dots; strain-induced micro- and nanoarchitectures; topology-driven effects in micro- and nanoarchitectures; topological states of light and spin-orbit coupling in microcavities; vortex matter in micro- and nanoarchitectures and patterned superconductors; spin-dependent phenomena in semiconductor micro-and nanoparticles; thermoelectric properties of semiconductor Nanostructures; phonons; vibrational excitations and polaronic effects in nanostructures
Dr. Oliver Marquardt

E-Mail Website
Guest Editor
Weierstraß-Institut für Angewandte Analysis und Stochastik, Leibniz-Institut im Forschungsverbund Berlin e.V, Mohrenstraße 39, 10117 Berlin, Germany
Interests: semiconductor nanostructures; elastic and optoelectronic properties; continuum models, electronic structure

Special Issue Information

Dear Colleagues,

The study of topological matter is one of the most fascinating key trends of modern physics. The present Special Issue is aimed at topology- and geometry-driven effects owing to complex geometries of advanced micro- and nanoarchitectures fabricated by both conventional and topologically nontrivial materials. Their design, production, and characterization constitute the main road toward future quantum devices for light emission, quantum cryptography, quantum information processing, thermoelectrics, bolometry, and other nanotechnologies. Correspondingly, many experimental and theoretical efforts have been invested in a systematic understanding of their properties, leading to novel applications. This Special Issue brings together experts in the field of topology- and geometry-controlled functionalization of nanostructured materials.

Topics of primary interest include but are not limited to the following:

Geometry- and topology-driven phenomena;
Functionalization of nanostructured materials;

  • Light emission
  • Quantum cryptography
  • Quantum information processing
  • High-tech acoustic metamaterials
  • Thermoelectrics
  • Bolometry
  • Superconducting electronics and spintronics
  • Diffractive optically variable image device
  • Multi-object spectrographs
  • THz grid metasurfaces for accurate sensing

Superconductor Micro-/nanoarchitectures;

  • Superconductor open microtubes
  • Topological transition from vortex chains to phase slips
  • Vortex patterns in micro- and nanohelices
  • Synergetic effects of curvature and chirality
  • Unconventional Josephson Junctions
  • Nanohybrid Josephson Junctions
  • Dissipation sources
  • Superconductors of different Euclidean dimensions
  • p-wave superconductivity

Semiconductor micro-/nanoarchitectures;

  • Coupled quantum dots
  • Polarization anisotropy of excitons, local and coupled biexcitons
  • Graded-composition quantum dots
  • Rolled-up bilayer nanostructures
  • Multishell nanotubes
  • Quantum dot–ring transition
  • Transrotational microcrystals and nanostructures

Polymers;

  • Coupled topological chains
  • 1D topology in STM experiments
  • Constrained hydrogel membranes
  • Soft mechanical metamaterials

Graphene;

  • Phonon-driven functionalization in graphene

Modern methods to analyze nanostructured materials;

  • Topological quantum chemistry
  • Differential geometry formalism
  • Density functional theory
  • Lattice-dynamics and molecular-dynamics approaches
  • Lattice spring model

Prof. Dr. Vladimir M. Fomin
Dr. Oliver Marquardt
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. Applied Sciences 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 2400 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.

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Published Papers (6 papers)

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Editorial

Jump to: Research

3 pages, 187 KiB  
Editorial
Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials
by Vladimir M. Fomin and Oliver Marquardt
Appl. Sci. 2023, 13(2), 1146; https://doi.org/10.3390/app13021146 - 14 Jan 2023
Viewed by 1077
Abstract
The study of topological matter is one of the most fascinating areas of modern physics [...] Full article
(This article belongs to the Special Issue Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials)

Research

Jump to: Editorial

10 pages, 2944 KiB  
Article
Halloysite Nanotubes with Immobilized Plasmonic Nanoparticles for Biophotonic Applications
by Anastasiia V. Kornilova, Sergey M. Novikov, Galiya A. Kuralbayeva, Subhra Jana, Ivan V. Lysenko, Anastasia I. Shpichka, Anna V. Stavitskaya, Maxim V. Gorbachevskii, Andrei A. Novikov, Saltanat B. Ikramova, Peter S. Timashev, Aleksey V. Arsenin, Valentyn S. Volkov, Alexander N. Vasiliev and Victor Yu. Timoshenko
Appl. Sci. 2021, 11(10), 4565; https://doi.org/10.3390/app11104565 - 17 May 2021
Cited by 7 | Viewed by 2512
Abstract
Halloysite nanotubes (HNTs) with immobilized gold (Au) and silver (Ag) nanoparticles (NPs) belong to a class of nanocomposite materials whose physical properties and applications depend on the geometry of arrangements of the plasmonic nanoparticles on HNT’ surfaces. We explore HNTs:(Au, Ag)-NPs as potential [...] Read more.
Halloysite nanotubes (HNTs) with immobilized gold (Au) and silver (Ag) nanoparticles (NPs) belong to a class of nanocomposite materials whose physical properties and applications depend on the geometry of arrangements of the plasmonic nanoparticles on HNT’ surfaces. We explore HNTs:(Au, Ag)-NPs as potential nano-templates for surface-enhanced Raman scattering (SERS). The structure and plasmonic properties of nanocomposites based on HNTs and Au- and Ag-NPs are studied by means of the transmission electron microscopy and optical spectroscopy. The optical extinction spectra of aqueous suspensions of HNTs:(Au, Ag)-NPs and spatial distributions of the electric fields are simulated, and the simulation results demonstrate the corresponding localized plasmonic resonances and numerous “hot spots” of the electric field nearby those NPs. In vitro experiments reveal an enhancement of the protein SERS in fibroblast cells with added HNTs:Ag-NPs. The observed optical properties and SERS activity of the nanocomposites based on HNTs and plasmonic NPs are promising for their applications in biosensorics and biophotonics. Full article
(This article belongs to the Special Issue Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials)
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19 pages, 5434 KiB  
Article
Enhancement of the Supercapacitive Performance of Cobalt-tin-cyanate Layered Structures through Conversion from 2D Materials to 1D Nanofibers
by Osama Saber, Sajid Ali Ansari and Abdullah Aljaafari
Appl. Sci. 2021, 11(9), 4289; https://doi.org/10.3390/app11094289 - 10 May 2021
Cited by 4 | Viewed by 2320
Abstract
Rational design of the micro-nanomorphology is highly desired for metal hydroxides to achieve overall high-performance electrodes for supercapacitor and energy storage applications. Here, in the current study, we have succeeded in controlling the morphology of Sn/Co nanolayered structures to obtain plate and nanofibrous [...] Read more.
Rational design of the micro-nanomorphology is highly desired for metal hydroxides to achieve overall high-performance electrodes for supercapacitor and energy storage applications. Here, in the current study, we have succeeded in controlling the morphology of Sn/Co nanolayered structures to obtain plate and nanofibrous morphologies. Additionally, the plate nanostructures could be transformed to obtain plate-nanofibrous morphologies. In this trend, dual anions such as cyanate and nitrate are applied to intercalate among the nanolayers of cobalt-tin and act as building blocks or pillars, producing a series of nanolayered structures. By repulsion forces among the intercalated anions, the nanolayers of Sn/Co are curled and converted to nanofibers. This conversion was confirmed by scanning electron microscopy. In addition, the intercalation reactions and nanolayered structures were indicated by X-ray diffraction, thermal analyses and Fourier-transform infrared spectroscopy. The electrochemical supercapacitive behavior of the different nanostructures of Sn/Co HDS and Sn/Co LDH, such as plate, Plate-nanofiber and nanofibrous morphology has been investigated in three assembly electrode system. The results suggested that the nanofiber morphology of Sn/Co LDH exhibited better specific capacitance performance than the other two morphologies. The enhanced specific capacitance (658 Fg−1) and excellent cyclic stability (89%) of the nanofibers of the Sn/Co LDH could be attributed to the synergistic effects between the electric double layer capacitive character of the tin and the pseudocapacitance nature of the cobalt. Full article
(This article belongs to the Special Issue Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials)
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12 pages, 3045 KiB  
Article
Phonons and Thermal Transport in Si/SiO2 Multishell Nanotubes: Atomistic Study
by Calina Isacova, Alexandr Cocemasov, Denis L. Nika and Vladimir M. Fomin
Appl. Sci. 2021, 11(8), 3419; https://doi.org/10.3390/app11083419 - 11 Apr 2021
Cited by 6 | Viewed by 2434
Abstract
Thermal transport in the Si/SiO2 multishell nanotubes is investigated theoretically. The phonon energy spectra are obtained using the atomistic lattice dynamics approach. Thermal conductivity is calculated using the Boltzmann transport equation within the relaxation time approximation. Redistribution of the vibrational spectra in [...] Read more.
Thermal transport in the Si/SiO2 multishell nanotubes is investigated theoretically. The phonon energy spectra are obtained using the atomistic lattice dynamics approach. Thermal conductivity is calculated using the Boltzmann transport equation within the relaxation time approximation. Redistribution of the vibrational spectra in multishell nanotubes leads to a decrease of the phonon group velocity and the thermal conductivity as compared to homogeneous Si nanowires. Phonon scattering on the Si/SiO2 interfaces is another key factor of strong reduction of the thermal conductivity in these structures (down to 0.2 Wm−1K−1 at room temperature). We demonstrate that phonon thermal transport in Si/SiO2 nanotubes can be efficiently suppressed by a proper choice of nanotube geometrical parameters: lateral cross section, thickness and number of shells. We argue that such nanotubes have prospective applications in modern electronics, in cases when low heat conduction is required. Full article
(This article belongs to the Special Issue Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials)
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14 pages, 2908 KiB  
Article
Electron Pumping and Spectral Density Dynamics in Energy-Gapped Topological Chains
by Marcin Kurzyna and Tomasz Kwapiński
Appl. Sci. 2021, 11(2), 772; https://doi.org/10.3390/app11020772 - 15 Jan 2021
Cited by 2 | Viewed by 1936
Abstract
Electron pumping through energy-gapped systems is restricted for vanishing local density of states at the Fermi level. In this paper, we propose a topological Su–Schrieffer–Heeger (SSH) chain between unbiased leads as an effective electron pump. We analyze the electron transport properties of topologically [...] Read more.
Electron pumping through energy-gapped systems is restricted for vanishing local density of states at the Fermi level. In this paper, we propose a topological Su–Schrieffer–Heeger (SSH) chain between unbiased leads as an effective electron pump. We analyze the electron transport properties of topologically trivial and nontrivial systems in the presence of external time-dependent forces in the form of one-Gaussian or two-Gaussian perturbations (train impulses). We have found that the topologically trivial chain stands for much better charge pump than other normal or nontrivial chains. It is important that, during the perturbation, electrons are pumped through the mid-gap temporary states or through the induced sidebands states outside the energy gap. We also analyze the local density of states dynamics during the quench transition between different topological phases of the SSH chain. It turns out that after the quench, the edge topological states migrate through other sites and can temporarily exist in a topologically trivial part of the system. The tight-binding Hamiltonian and the evolution operator technique are used in our calculations. Full article
(This article belongs to the Special Issue Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials)
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20 pages, 1530 KiB  
Article
Quantum Eigenstates of Curved and Varying Cross-Sectional Waveguides
by Jens Gravesen and Morten Willatzen
Appl. Sci. 2020, 10(20), 7240; https://doi.org/10.3390/app10207240 - 16 Oct 2020
Cited by 2 | Viewed by 1513
Abstract
A simple one-dimensional differential equation in the centerline coordinate of an arbitrarily curved quantum waveguide with a varying cross section is derived using a combination of differential geometry and perturbation theory. The model can tackle curved quantum waveguides with a cross-sectional shape and [...] Read more.
A simple one-dimensional differential equation in the centerline coordinate of an arbitrarily curved quantum waveguide with a varying cross section is derived using a combination of differential geometry and perturbation theory. The model can tackle curved quantum waveguides with a cross-sectional shape and dimensions that vary along the axis. The present analysis generalizes previous models that are restricted to either straight waveguides with a varying cross-section or curved waveguides, where the shape and dimensions of the cross section are fixed. We carry out full 2D wave simulations on a number of complex waveguide geometries and demonstrate excellent agreement with the eigenstates and energies obtained using our present 1D model. It is shown that the computational benefit in using the present 1D model to calculate both 2D and 3D wave solutions is significant and allows for the fast optimization of complex quantum waveguide design. The derived 1D model renders direct access as to how quantum waveguide eigenstates depend on varying cross-sectional dimensions, the waveguide curvature, and rotation of the cross-sectional frame. In particular, a gauge transformation reveals that the individual effects of curvature, thickness variation, and frame rotation correspond to separate terms in a geometric potential only. Generalization of the present formalism to electromagnetics and acoustics, accounting appropriately for the relevant boundary conditions, is anticipated. Full article
(This article belongs to the Special Issue Topology- and Geometry-Controlled Functionalization of Nanostructured Metamaterials)
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