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Search for "topology" in Full Text gives 79 result(s) in Beilstein Journal of Nanotechnology.

Controlling the proximity effect in a Co/Nb multilayer: the properties of electronic transport

  • Sergey Bakurskiy,
  • Mikhail Kupriyanov,
  • Nikolay V. Klenov,
  • Igor Soloviev,
  • Andrey Schegolev,
  • Roman Morari,
  • Yury Khaydukov and
  • Anatoli S. Sidorenko

Beilstein J. Nanotechnol. 2020, 11, 1336–1345, doi:10.3762/bjnano.11.118

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  • Contrary to traditional semiconductor basic elements (transistors), tunable kinetic inductors (TKIs), as well as nonlinear elements (Josephson junctions), are not fabricated in a substrate. This allows for 3D topology benefits, which are especially important for deep ANNs. The F1/s/F2/s superlattice, in
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Published 07 Sep 2020

Advanced hybrid nanomaterials

  • Andreas Taubert,
  • Fabrice Leroux,
  • Pierre Rabu and
  • Verónica de Zea Bermudez

Beilstein J. Nanotechnol. 2019, 10, 2563–2567, doi:10.3762/bjnano.10.247

Graphical Abstract
  • synthesize clusters, so-called colloidal molecules [21]. Nanospherical satellites were covalently bonded via amide groups within the dimples of valence-endowed patchy nanoparticles, allowing the tuning of their topology and self-assembling ability. Polyion complex micelles formed by complexation between poly
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Editorial
Published 20 Dec 2019

Air oxidation of sulfur mustard gas simulants using a pyrene-based metal–organic framework photocatalyst

  • Ghada Ayoub,
  • Mihails Arhangelskis,
  • Xuan Zhang,
  • Florencia Son,
  • Timur Islamoglu,
  • Tomislav Friščić and
  • Omar K. Farha

Beilstein J. Nanotechnol. 2019, 10, 2422–2427, doi:10.3762/bjnano.10.232

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  • topology NU-400 and HDTRA1-18-1-0003 for catalysis study). T. F. acknowledges financial support of the National Science and Engineering Research Council (NSERC) Discovery Grant (RGPIN-2017-06467), NSERC E.W.R. Steacie Memorial Fellowship (SMFSU 507347-17) and McGill University Graduate Student Mobility
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Published 09 Dec 2019

The impact of crystal size and temperature on the adsorption-induced flexibility of the Zr-based metal–organic framework DUT-98

  • Simon Krause,
  • Volodymyr Bon,
  • Hongchu Du,
  • Rafal E. Dunin-Borkowski,
  • Ulrich Stoeck,
  • Irena Senkovska and
  • Stefan Kaskel

Beilstein J. Nanotechnol. 2019, 10, 1737–1744, doi:10.3762/bjnano.10.169

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  • pillared-layer MOF [19]. Although these reports demonstrate the influence of crystal size on the structural behavior of flexible MOFs, the materials for which this phenomenon was reported differ in terms of topology, the nature of the structural transitions and the resulting adsorption behavior. In fact
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Published 20 Aug 2019

Stationary beam full-field transmission helium ion microscopy using sub-50 keV He+: Projected images and intensity patterns

  • Michael Mousley,
  • Santhana Eswara,
  • Olivier De Castro,
  • Olivier Bouton,
  • Nico Klingner,
  • Christoph T. Koch,
  • Gregor Hlawacek and
  • Tom Wirtz

Beilstein J. Nanotechnol. 2019, 10, 1648–1657, doi:10.3762/bjnano.10.160

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  • a highly coherent He+ source was available, techniques similar to coherent diffractive imaging could be used. These techniques apply an iterative procedure to retrieve the phase of a wave [36]. In reflection, this phase would be determined by the surface potential, which is linked to the topology or
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Published 07 Aug 2019

Graphynes: an alternative lightweight solution for shock protection

  • Kang Xia,
  • Haifei Zhan,
  • Aimin Ji,
  • Jianli Shao,
  • Yuantong Gu and
  • Zhiyong Li

Beilstein J. Nanotechnol. 2019, 10, 1588–1595, doi:10.3762/bjnano.10.154

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  • [8]. GY has a non-zero bandgap, which indicates a potential application in next-generation carbon-based semiconductors [9]. In addition, the properties of GYs are highly tunable through the modification of the topology. For instance, GYs are found to absorb light in the HOMO–LUMO band and the energy
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Published 31 Jul 2019

A porous 3D-RGO@MWCNT hybrid material as Li–S battery cathode

  • Yongguang Zhang,
  • Jun Ren,
  • Yan Zhao,
  • Taizhe Tan,
  • Fuxing Yin and
  • Yichao Wang

Beilstein J. Nanotechnol. 2019, 10, 514–521, doi:10.3762/bjnano.10.52

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  • (HRTEM, JEOL JEM-2100F) images were used for investigating surface topology. The content of sulfur in the S-3D-RGO@MWCNT composite was confirmed using thermogravimetric analysis (TGA, SHIMADZU DTG-60) in Ar atmosphere. Raman spectra were recorded on Raman spectrometer (Raman, Renishaw) using 532 nm
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Published 21 Feb 2019

Layered calcium phenylphosphonate: a hybrid material for a new generation of nanofillers

  • Kateřina Kopecká,
  • Ludvík Beneš,
  • Klára Melánová,
  • Vítězslav Zima,
  • Petr Knotek and
  • Kateřina Zetková

Beilstein J. Nanotechnol. 2018, 9, 2906–2915, doi:10.3762/bjnano.9.269

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  • “in several portions” methods (CaPhP_s) and “all at once” (CaPhP_a). AFM images illustrating the topology of CaPhP particles prepared by addition of calcium chloride solution: “drop by drop” (CaPhP_d), “in several portions” (CaPhP_s) and “all at once” (CaPhP_a). CaPhP nanoparticles in various solvents
  • and too strong mixing. AFM topology scan of exfoliated CaPhP: monolamellar sheets (light gray areas), incompletely exfoliated particles (white areas) and line profiles (right) corresponding to the marked regions in the image to the left. Pictures of the composite-free films with 0.5 wt % loading of
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Published 20 Nov 2018

Pattern generation for direct-write three-dimensional nanoscale structures via focused electron beam induced deposition

  • Lukas Keller and
  • Michael Huth

Beilstein J. Nanotechnol. 2018, 9, 2581–2598, doi:10.3762/bjnano.9.240

Graphical Abstract
  • are arranged in series. Accordingly, with increasing distance from the substrate surface, the supply of growing edges with precursor tends to get smaller, but in a way that depends on the topology and geometry of the growing 3D structure. In our algorithmic implementation this is taken into account by
  • sF renormalization is now done according to If the structure is reasonably regular and symmetric this approach works well. For structures with strong height-dependent variations in topology or geometry one set of parameters αn independent of the height will not suffice. In section 4.4.2 we discuss
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Published 27 Sep 2018

High-temperature magnetism and microstructure of a semiconducting ferromagnetic (GaSb)1−x(MnSb)x alloy

  • Leonid N. Oveshnikov,
  • Elena I. Nekhaeva,
  • Alexey V. Kochura,
  • Alexander B. Davydov,
  • Mikhail A. Shakhov,
  • Sergey F. Marenkin,
  • Oleg A. Novodvorskii,
  • Alexander P. Kuzmenko,
  • Alexander L. Vasiliev,
  • Boris A. Aronzon and
  • Erkki Lahderanta

Beilstein J. Nanotechnol. 2018, 9, 2457–2465, doi:10.3762/bjnano.9.230

Graphical Abstract
  • to 413 K does not change surface topology containing regions of larger height (Figure 6a and Figure 6c), while the phase contrast in the MFM images (Figure 6b and Figure 6d), which characterizes magnetization of the film, decreases at higher temperatures. Nevertheless, the MFM images reveal the
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Published 14 Sep 2018

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

  • Muhammad Imran,
  • Nunzio Motta and
  • Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

Graphical Abstract
  • structural properties, including size and topology of the MOx 1D nanostructures, which leads to a change in their chemical sensing behaviour. [8][147][148][149][150]. Yamazoe et al.[151][152] explained the two types of functionalization mechanisms occurring in metal oxides as chemical sensitization and
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Published 13 Aug 2018

Robust topological phase in proximitized core–shell nanowires coupled to multiple superconductors

  • Tudor D. Stanescu,
  • Anna Sitek and
  • Andrei Manolescu

Beilstein J. Nanotechnol. 2018, 9, 1512–1526, doi:10.3762/bjnano.9.142

Graphical Abstract
  • represent topologically nontrivial phases with = −1. The effect of a symmetry-breaking potential is illustrated in panel (B) of Figure 2. While the topology of the phase diagram is the same, the phase boundaries are modified significantly with respect to panel (A). We note that this result was obtained by
  • as a results of a stronger inter-chain coupling t′. The topology of the phase diagram is similar to that shown in Figure 6. However, the low-field topological phase now occupies a significant region of the parameter space and the minimum critical field is practically zero. Furthermore, the
  • simplified tight-binding parallel-chain model. We found that applying a potential that breaks the (intrinsic) rotation symmetry of the wire does not modify the topology of the phase diagram, but removes the gapless superconducting phases that populate certain regions of the phase diagram and partially
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Published 22 May 2018

Preparation and morphology-dependent wettability of porous alumina membranes

  • Dmitry L. Shimanovich,
  • Alla I. Vorobjova,
  • Daria I. Tishkevich,
  • Alex V. Trukhanov,
  • Maxim V. Zdorovets and
  • Artem L. Kozlovskiy

Beilstein J. Nanotechnol. 2018, 9, 1423–1436, doi:10.3762/bjnano.9.135

Graphical Abstract
  • ) after etching of the barrier layer. Schematic representation of the different models for pore wetting: A – Cassie–Baxter model [38], B – Wenzel model [38], C, D – schemes to explain wetting in our study. Contact angle as a function of surface topology (middle column images (B, E, H) are outer surfaces
  • and right-hand column images (C, F, I) are back surfaces) for a PAM synthesized using type I synthesis conditions. (A–C) Sample 1; (D–F) sample 5 and (G–I) sample 4. (A, D, G) SEM images of outer and back (inset) surfaces of these samples. Contact angle as a function of surface topology (middle column
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Published 15 May 2018

Robust midgap states in band-inverted junctions under electric and magnetic fields

  • Álvaro Díaz-Fernández,
  • Natalia del Valle and
  • Francisco Domínguez-Adame

Beilstein J. Nanotechnol. 2018, 9, 1405–1413, doi:10.3762/bjnano.9.133

Graphical Abstract
  • connection between the quantum Hall effect and a topological invariant, the so-called first Chern number [2]. The fact that a quantum Hall system was insulating in the bulk but had a quantized conductivity on the edge could be related to the non-trivial topology of the band structure. In 2006, topology came
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Published 14 May 2018

Andreev spectrum and supercurrents in nanowire-based SNS junctions containing Majorana bound states

  • Jorge Cayao,
  • Annica M. Black-Schaffer,
  • Elsa Prada and
  • Ramón Aguado

Beilstein J. Nanotechnol. 2018, 9, 1339–1357, doi:10.3762/bjnano.9.127

Graphical Abstract
  • regime, I() is finite away from nπ for n = 0,1,…. The finite value of the supercurrent could serve as another indicator of the non-trivial topology and, thus, of the emergence of MBSs in the junction. Disorder effects Now we analyze the sawtooth profile of I() for B > Bc in the presence of disorder
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Published 03 May 2018

The electrical conductivity of CNT/graphene composites: a new method for accelerating transmission function calculations

  • Olga E. Glukhova and
  • Dmitriy S. Shmygin

Beilstein J. Nanotechnol. 2018, 9, 1254–1262, doi:10.3762/bjnano.9.117

Graphical Abstract
  • direction. This can be explained by the high electrical conductance of graphene nanostructures with a zigzag edge. The conductance of these ribbons does not depend on the width of the ribbon and weakly depends on its topology. In the direction of the X-axis (armchair edge of graphene sheet), the electrical
  • conductance of single- and two-layer composites depends significantly on the topology of the film. The resistance changes drastically with the increase in the CNT length. Conclusion We created a new universal method for calculating the electron-transmission function and electrical conductance at quantum
  • conductance of these ribbons does not depend on the width of the ribbon and weakly depends on its topology. In the direction of the armchair edge of the graphene sheet, the electrical conductance depends significantly on the topology of the film. The resistance changes drastically with the increase in CNT
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Published 20 Apr 2018

Nematic topological defects positionally controlled by geometry and external fields

  • Pavlo Kurioz,
  • Marko Kralj,
  • Bryce S. Murray,
  • Charles Rosenblatt and
  • Samo Kralj

Beilstein J. Nanotechnol. 2018, 9, 109–118, doi:10.3762/bjnano.9.13

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  • of Physics, Faculty of Natural Sciences and Mathematics, University of Maribor, Koroska cesta 160, 2000 Maribor, Slovenia Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia 10.3762/bjnano.9.13 Abstract Using a Landau–de Gennes approach, we study the impact of confinement topology, geometry
  • ” half-hedgehog structure. The core structure is relatively complex [19] and is schematically shown in Figure 7. Its core is characterized by a negatively uniaxial finger, surrounded by a shell exhibiting maximal biaxiality, β2 = 1. The fingertip is melted due to the topology of the surroundings. To
  • strength, as it is illustrated in Figure 9. To achieve this, the external field must be relatively strong, i.e., ξE ≈ ξb, which in a typical LC would correspond to E ≈ 108 V/m. Conclusion We studied numerically the impact of geometry, topology, and external fields on patterns and positions of nematic
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Published 10 Jan 2018

Beyond Moore’s technologies: operation principles of a superconductor alternative

  • Igor I. Soloviev,
  • Nikolay V. Klenov,
  • Sergey V. Bakurskiy,
  • Mikhail Yu. Kupriyanov,
  • Alexander L. Gudkov and
  • Anatoli S. Sidorenko

Beilstein J. Nanotechnol. 2017, 8, 2689–2710, doi:10.3762/bjnano.8.269

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Published 14 Dec 2017

Localized growth of carbon nanotubes via lithographic fabrication of metallic deposits

  • Fan Tu,
  • Martin Drost,
  • Imre Szenti,
  • Janos Kiss,
  • Zoltan Kónya and
  • Hubertus Marbach

Beilstein J. Nanotechnol. 2017, 8, 2592–2605, doi:10.3762/bjnano.8.260

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  • the right column of Figure 2 depict the same areas after the corresponding CVD experiment. Inspection of these images reveals that indeed CNTs were grown with different yield and topology on the prefabricated Fe deposits. It becomes immediately clear that the CNT yield increases with the applied
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Published 05 Dec 2017

Evaluating the toxicity of TiO2-based nanoparticles to Chinese hamster ovary cells and Escherichia coli: a complementary experimental and computational approach

  • Alicja Mikolajczyk,
  • Natalia Sizochenko,
  • Ewa Mulkiewicz,
  • Anna Malankowska,
  • Michal Nischk,
  • Przemyslaw Jurczak,
  • Seishiro Hirano,
  • Grzegorz Nowaczyk,
  • Adriana Zaleska-Medynska,
  • Jerzy Leszczynski,
  • Agnieszka Gajewicz and
  • Tomasz Puzyn

Beilstein J. Nanotechnol. 2017, 8, 2171–2180, doi:10.3762/bjnano.8.216

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  • each equation is applicable only for a certain topology (pure, alloy, core–shell) or chemistry (Au, Pd, Au/Pd) of TiO2-based nanoparticles. Taken together, these results suggest, that multimode action of nanoparticles at different Au and Pd concentrations are driven by nonlinear size-effects and
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Published 17 Oct 2017

A comparative study of the nanoscale and macroscale tribological attributes of alumina and stainless steel surfaces immersed in aqueous suspensions of positively or negatively charged nanodiamonds

  • Colin K. Curtis,
  • Antonin Marek,
  • Alex I. Smirnov and
  • Jacqueline Krim

Beilstein J. Nanotechnol. 2017, 8, 2045–2059, doi:10.3762/bjnano.8.205

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  • alumina and stainless steel substrates obtained directly from the instrument manufacturer or stainless steel penny washers situated in place of the disk while in contact with the stainless steel ball. Atomic force microscopy and scanning electron microscopy characterization of surface topology Surface
  • topology characterization of the QCM electrodes was performed with an Asylum Research MFP 3D AFM equipped with silicon nitride tips (part#NCHV-A, Bruker AFM Probes, Camarillo, CA) and operated in a tapping mode. The 1024 × 1024 images were recorded at a rate of 1 line/s yielding a height profile h = h(xi
  • could potentially remove the electrode material by an accelerated penetration into surface asperities by the oscillatory action of the QCM [44][45][46]. Additional scanning electron microscopy (SEM) images (Figure 5) were recorded on the SS304 samples to further elucidate changes in the surface topology
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Published 29 Sep 2017

Micro- and nano-surface structures based on vapor-deposited polymers

  • Hsien-Yeh Chen

Beilstein J. Nanotechnol. 2017, 8, 1366–1374, doi:10.3762/bjnano.8.138

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  • the resulting coatings are mostly applicable to a wide range of substrate materials [1]. In addition, the vapor deposition process typically provides excellent coating fidelity, i.e., the resulting polymer coatings are conformal with respect to micrometer- or nanometer-sized topology of the substrate
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Published 04 Jul 2017

Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media

  • Ruchi Deshmukh,
  • Anurag Mehra and
  • Rochish Thaokar

Beilstein J. Nanotechnol. 2017, 8, 494–505, doi:10.3762/bjnano.8.53

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  • FEGSEM, operated at 5, 10 and 15 kV, was used to obtain information about morphology and topology of the nanostructures. Microscopy samples were prepared by placing a small drop of the sample on a carbon-coated copper 200 mesh grid and subsequent vacuum drying at room temperature for 12 h. Energy
  • chains, TEAH and TBAH. As the length of the alkyl chain increases, the dissociation of OH− ions decreases and affects the morphology thus achieved. The use of TEAH and TBAH generates particles with distinct surface topology and crystalline properties. Using TEAH, small nanoplates of approximately 50–70
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Published 23 Feb 2017

Multimodal cantilevers with novel piezoelectric layer topology for sensitivity enhancement

  • Steven Ian Moore,
  • Michael G. Ruppert and
  • Yuen Kuan Yong

Beilstein J. Nanotechnol. 2017, 8, 358–371, doi:10.3762/bjnano.8.38

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  • ]. While good imaging performance is achieved when operating these cantilevers at higher order modes, the topology of the piezoelectric layer is designed with no consideration of the modal response of the cantilever. A number of researchers have investigated shaping the piezoelectric layer to actuate or
  • topology of the piezoelectric layer on an AFM cantilever to maximize the actuator gain and sensor sensitivity with respect to the cantilever’s higher order modes. Compared to previous work on modal sensor/actuators [42][43][44][45][46], the design specification of the presented work is to enhance the
  • desired modes rather than suppress the undesirable modes. This difference leads to fundamental changes in the design strategy, resulting piezoelectric layer topology, instrumentation, actuator characteristics and sensor characteristics. Indeed, the justification for this altered approach comes from the
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Published 06 Feb 2017

A novel electrochemical nanobiosensor for the ultrasensitive and specific detection of femtomolar-level gastric cancer biomarker miRNA-106a

  • Maryam Daneshpour,
  • Kobra Omidfar and
  • Hossein Ghanbarian

Beilstein J. Nanotechnol. 2016, 7, 2023–2036, doi:10.3762/bjnano.7.193

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  • streptavidin–biotin approach was also used to immobilize P2 on the electrode surface. For this purpose, the SPCEs were modified by physical attachment of streptavidin and immobilization of biotinylated P2. Topology alterations occurred on the SPCE surface during mentioned modifications were explored using AFM
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Published 19 Dec 2016
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