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Search for "heterostructures" in Full Text gives 122 result(s) in Beilstein Journal of Nanotechnology.

Observation of unexpected uniaxial magnetic anisotropy in La2/3Sr1/3MnO3 films by a BaTiO3 overlayer in an artificial multiferroic bilayer

  • John E. Ordóñez,
  • Lorena Marín,
  • Luis A. Rodríguez,
  • Pedro A. Algarabel,
  • José A. Pardo,
  • Roger Guzmán,
  • Luis Morellón,
  • César Magén,
  • Etienne Snoeck,
  • María E. Gómez and
  • Manuel R. Ibarra

Beilstein J. Nanotechnol. 2020, 11, 651–661, doi:10.3762/bjnano.11.51

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  • , Universidad de Zaragoza, 50018 Zaragoza, Spain 10.3762/bjnano.11.51 Abstract We studied in detail the in-plane magnetic properties of heterostructures based on a ferroelectric BaTiO3 overlayer deposited on a ferromagnetic La2/3Sr1/3MnO3 film grown epitaxially on pseudocubic (001)-oriented SrTiO3, (LaAlO3)0.3
  • ., ferromagnetic (FM) for LSMO and ferroelectric (FE) for BTO, and BTO/LSMO heterostructures have exhibited magnetoelectric coupling (MEC) [6][7][8]. They constitute a type of artificial hybrid multiferroic material that can be employed to build the next-generation sensors, multiple-state memory elements, magnetic
  • improve our understanding of the mechanisms driving MEC in BTO/LSMO heterostructures. In this work, we show how the presence of a BTO layer on an LSMO film under different substrate-induced epitaxial strains can affect the magnetic anisotropy of the LSMO layer at room temperature. To strain the sample, we
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Published 16 Apr 2020

Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes

  • Wei Fang,
  • Liang Yu and
  • Lan Xu

Beilstein J. Nanotechnol. 2020, 11, 631–650, doi:10.3762/bjnano.11.50

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  • thick pebble-like nanoparticles. When the hydrothermal temperature is 100 °C, the CuO–ZnO heterostructures similar to a honeycomb are obtained. When the hydrothermal temperatures are 120, 140 and 160 °C, the CuO–ZnO heterostructures formed were petal-like and resembled flowers. However, the
  • heterostructures obtained at 120 and 140 °C are much more regular and thinner than those obtained at 160 °C. When the temperature reaches 180 °C, the nanofibers begin to shrink due to the melting of PVDF, and CuO–ZnO heterostructure do not form. Therefore, temperatures of 120–140 °C were chosen for hydrothermal
  • the synthesis time is 6 h, the CuO–ZnO heterostructures are regularly stacked petal-like sheets with distinct edges and corners. After a synthesis time of 12 h, the CuO–ZnO heterostructures are also petal-like, but thicker than those after 6 h. When the synthesis time is 18 h, the CuO–ZnO
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Published 15 Apr 2020

Synthesis and enhanced photocatalytic performance of 0D/2D CuO/tourmaline composite photocatalysts

  • Changqiang Yu,
  • Min Wen,
  • Zhen Tong,
  • Shuhua Li,
  • Yanhong Yin,
  • Xianbin Liu,
  • Yesheng Li,
  • Tongxiang Liang,
  • Ziping Wu and
  • Dionysios D. Dionysiou

Beilstein J. Nanotechnol. 2020, 11, 407–416, doi:10.3762/bjnano.11.31

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  • construction of CuO-based heterostructures (e.g., 0D/2D CuO/TiO2, 0D/3D CuO/ZnO, 2D/2D CuO/Fe2O3, 0D/2D CuO/C3N4, 2D/0D CuO/Ag3PO4) [6][12][15][16][17] and the dispersion of CuO on supporting materials (e.g., graphene, carbon nanotube) [7][18] are considered to be the most effective ways to address these
  • problems. However, it is difficult to obtain uniform heterostructures, and the preparation process is either complex or of high cost. Therefore, exploring low-cost and easily synthesized CuO-based materials with good photoreactive properties is still an urgent task. Especially the 0D/2D structure has been
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Published 02 Mar 2020

Synthesis and acetone sensing properties of ZnFe2O4/rGO gas sensors

  • Kaidi Wu,
  • Yifan Luo,
  • Ying Li and
  • Chao Zhang

Beilstein J. Nanotechnol. 2019, 10, 2516–2526, doi:10.3762/bjnano.10.242

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  • effects in the heterostructures. This will enable corresponding gas sensors to accurately detect and monitor acetone vapor in real-time. In this view, compounding with certain organic or inorganic material could improve the gas sensing properties of ZnFe2O4 [18][19]. As a novel 2D carbon-based material
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Published 16 Dec 2019

Pulsed laser synthesis of highly active Ag–Rh and Ag–Pt antenna–reactor-type plasmonic catalysts

  • Kenneth A. Kane and
  • Massimo F. Bertino

Beilstein J. Nanotechnol. 2019, 10, 1958–1963, doi:10.3762/bjnano.10.192

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  • Kenneth A. Kane Massimo F. Bertino Department of Physics, Virginia Commonwealth University, Richmond, Virginia, 23220, USA 10.3762/bjnano.10.192 Abstract Ag, Pt, and Rh monometallic colloids were produced via laser ablation. Separate Ag–Rh and Ag–Pt heterostructures were formed by mixing and
  • resulted in groupings of Rh/Pt nanoparticles adsorbing to the concavities of the larger Ag nanostructures. The 400 nm Ag plasmonic absorption peak was slightly blue-shifted for Ag–Pt and red-shifted for Ag–Rh heterostructures. Catalytic activity for the reduction of 4-nitrophenol increased significantly
  • –reactor; catalysis; heterostructures; laser ablation; multicomponent; nanoparticles; 4-nitrophenol; plasmonic; Pt; Rh; Introduction Metal nanoparticles can interact with visible light through an excitation of the localized surface plasmon resonance (LSPR). The LSPR is a resonant, collective oscillation
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Published 26 Sep 2019

Layered double hydroxide/sepiolite hybrid nanoarchitectures for the controlled release of herbicides

  • Ediana Paula Rebitski,
  • Margarita Darder and
  • Pilar Aranda

Beilstein J. Nanotechnol. 2019, 10, 1679–1690, doi:10.3762/bjnano.10.163

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  • materials, and macromolecular systems of DNA and cells [2][3][4][5]. In this context, clay-based nanoarchitectonic materials have been developed over the years, starting from classical pillared clays and porous clay heterostructures (PCH) to more innovative materials involving the assembly of different
  • used strategies included wet impregnation and layer-by-layer approaches to produce diverse type of multilayer heterostructures, e.g., ZnCr-LDH/TiO2 films [30], in situ formation of the LDH in presence of other nanoparticles, e.g., sepiolite [31], and reconstruction of the LDH from parent “layered
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Published 09 Aug 2019

Giant magnetoresistance ratio in a current-perpendicular-to-plane spin valve based on an inverse Heusler alloy Ti2NiAl

  • Yu Feng,
  • Zhou Cui,
  • Bo Wu,
  • Jianwei Li,
  • Hongkuan Yuan and
  • Hong Chen

Beilstein J. Nanotechnol. 2019, 10, 1658–1665, doi:10.3762/bjnano.10.161

Graphical Abstract
  • [21]. Spin gapless semiconductor characteristics are also demonstrated in Mn2CoAl [22][23][24][25] and Ti2MnAl [26][27]. The interface characteristics of heterostructures based on inverse Heusler alloys have been studied in detail [28][29][30]. Therefore, inverse Heusler compounds exhibit exceptional
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Published 08 Aug 2019

Kelvin probe force microscopy work function characterization of transition metal oxide crystals under ongoing reduction and oxidation

  • Dominik Wrana,
  • Karol Cieślik,
  • Wojciech Belza,
  • Christian Rodenbücher,
  • Krzysztof Szot and
  • Franciszek Krok

Beilstein J. Nanotechnol. 2019, 10, 1596–1607, doi:10.3762/bjnano.10.155

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  • future energy production and storage. As the majority of applications involve the use of heterostructures, the most suitable characterization technique is Kelvin probe force microscopy (KPFM), which provides excellent energetic and lateral resolution. In this paper, we demonstrate precise
  • applications are nowadays based on oxide heterostructures, not only is macroscopic information of the work function needed (which may be provided by averaging techniques such as ultraviolet photoelectron spectroscopy (UPS)) but also spatial resolution on the nanoscale. Driven by its remarkable lateral and
  • energetic resolution, Kelvin probe force microscopy (KPFM, also known as scanning Kelvin probe microscopy, SKPM) is the tool of choice for the precise measurement of the WF across oxide heterostructures, which is a technique that has not been fully exploited to date. In recent years, KPFM has proved to be
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Published 02 Aug 2019

Unipolar magnetic field pulses as an advantageous tool for ultrafast operations in superconducting Josephson “atoms”

  • Daria V. Popolitova,
  • Nikolay V. Klenov,
  • Igor I. Soloviev,
  • Sergey V. Bakurskiy and
  • Olga V. Tikhonova

Beilstein J. Nanotechnol. 2019, 10, 1548–1558, doi:10.3762/bjnano.10.152

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  • [3]), where Josephson energies of the elements are EJos, EJos and αEJos (α = 0.9, junctions depicted as crosses). The characteristic Josephson energy EJos is 80 times larger than the characteristic Coulomb energy of the heterostructures. φ is the generalized coordinate associated with the Josephson
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Published 29 Jul 2019

High-temperature resistive gas sensors based on ZnO/SiC nanocomposites

  • Vadim B. Platonov,
  • Marina N. Rumyantseva,
  • Alexander S. Frolov,
  • Alexey D. Yapryntsev and
  • Alexander M. Gaskov

Beilstein J. Nanotechnol. 2019, 10, 1537–1547, doi:10.3762/bjnano.10.151

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  • heterostructures were intensively studied as sensitive elements of field-effect or Schottky diode gas sensors. These materials have a high sensitivity to hydrogen and hydrocarbons in the temperature range of 200–600 °C [9][10][11][12][13][14]. The resistive-type sensors based on MO/SiC composite materials have not
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Published 26 Jul 2019

Superconducting switching due to a triplet component in the Pb/Cu/Ni/Cu/Co2Cr1−xFexAly spin-valve structure

  • Andrey Andreevich Kamashev,
  • Nadir Nurgayazovich Garif’yanov,
  • Aidar Azatovich Validov,
  • Joachim Schumann,
  • Vladislav Kataev,
  • Bernd Büchner,
  • Yakov Victorovich Fominov and
  • Ilgiz Abdulsamatovich Garifullin

Beilstein J. Nanotechnol. 2019, 10, 1458–1463, doi:10.3762/bjnano.10.144

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  • , 5, 021019, in achieving large values of the switching effect. Keywords: ferromagnet; proximity effect; superconductor; Introduction For decades, metallic thin-film heterostructures have been in the in the focus of fundamental research in condensed matter physics and materials science. They show
  • novel fundamental physical phenomena that are absent in the initial materials from which the heterostructures are made. Moreover, those phenomena can also be of remarkable technological relevance. A very prominent example is the discovery, in 1988, of the giant magnetoresistance (GMR) effect in
  • heterostructures composed of alternating layers of ferromagnetic and nonmagnetic metallic layers, which opened a new era of electronics, the so-called spin electronics or, in short, spintronics [1][2][3]. A new, more recent development in spintronics was based on the idea of integrating superconducting layers into
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Published 19 Jul 2019

Construction of a 0D/1D composite based on Au nanoparticles/CuBi2O4 microrods for efficient visible-light-driven photocatalytic activity

  • Weilong Shi,
  • Mingyang Li,
  • Hongji Ren,
  • Feng Guo,
  • Xiliu Huang,
  • Yu Shi and
  • Yubin Tang

Beilstein J. Nanotechnol. 2019, 10, 1360–1367, doi:10.3762/bjnano.10.134

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  • , respectively. The photocatalytic experiments and characterizations are given in Supporting Information File 1. Results and Discussion In this work, we prepared 0D/1D Au/CBO heterostructures via a simple thermal reduction–precipitation method (Figure 1). The rod-like CBO was synthesized through a hydrothermal
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Published 04 Jul 2019

Pure and mixed ordered monolayers of tetracyano-2,6-naphthoquinodimethane and hexathiapentacene on the Ag(100) surface

  • Robert Harbers,
  • Timo Heepenstrick,
  • Dmitrii F. Perepichka and
  • Moritz Sokolowski

Beilstein J. Nanotechnol. 2019, 10, 1188–1199, doi:10.3762/bjnano.10.118

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  • have a “great potential for use in next-generation textile and wearable electronics” [22]. HTPEN was investigated as a material for organic solar cells [23], for which purpose it was combined with lead(II) phthalocyanine and pentacene. These heterostructures exhibit a greater range of photosensitivity
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Published 06 Jun 2019

Photoactive nanoarchitectures based on clays incorporating TiO2 and ZnO nanoparticles

  • Eduardo Ruiz-Hitzky,
  • Pilar Aranda,
  • Marwa Akkari,
  • Nithima Khaorapapong and
  • Makoto Ogawa

Beilstein J. Nanotechnol. 2019, 10, 1140–1156, doi:10.3762/bjnano.10.114

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  • nanoarchitectures have been prepared by in situ generation of ZnO NPs using Zn acetylacetonate precursor in isopropanol under reflux in the presence of the organoclays, leading to intermediate ZnO@clay organo-heterostructures. After calcination, the organic matter (alkyl groups from the organoclay) is eliminated and
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Published 31 May 2019

Synthesis of novel C-doped g-C3N4 nanosheets coupled with CdIn2S4 for enhanced photocatalytic hydrogen evolution

  • Jingshuai Chen,
  • Chang-Jie Mao,
  • Helin Niu and
  • Ji-Ming Song

Beilstein J. Nanotechnol. 2019, 10, 912–921, doi:10.3762/bjnano.10.92

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  • ]. In addition, hierarchical CdIn2S4/graphene nano-heterostructures have been fabricated as efficient photocatalysts for solar H2 evolution [33]. In this study, synergy can be obtained by combining the two strategies, self-doped C-atom g-C3N4 (CCN) and hybridization with another semiconductor, to
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Published 18 Apr 2019

Electronic properties of several two dimensional halides from ab initio calculations

  • Mohamed Barhoumi,
  • Ali Abboud,
  • Lamjed Debbichi,
  • Moncef Said,
  • Torbjörn Björkman,
  • Dario Rocca and
  • Sébastien Lebègue

Beilstein J. Nanotechnol. 2019, 10, 823–832, doi:10.3762/bjnano.10.82

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  • earlier studies [42] that 2D materials can display a much larger sunlight absorption than commonly employed semiconductors. Also, the materials studied here can be employed in heterostructures to complement or replace other large-bandgap 2D materials, such as hexagonal boron nitride, or to dissociate
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Published 03 Apr 2019

Integration of LaMnO3+δ films on platinized silicon substrates for resistive switching applications by PI-MOCVD

  • Raquel Rodriguez-Lamas,
  • Dolors Pla,
  • Odette Chaix-Pluchery,
  • Benjamin Meunier,
  • Fabrice Wilhelm,
  • Andrei Rogalev,
  • Laetitia Rapenne,
  • Xavier Mescot,
  • Quentin Rafhay,
  • Hervé Roussel,
  • Michel Boudard,
  • Carmen Jiménez and
  • Mónica Burriel

Beilstein J. Nanotechnol. 2019, 10, 389–398, doi:10.3762/bjnano.10.38

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  • -based devices fabricated using optimized growth strategies. Keywords: manganite; metal organic chemical vapour deposition (MOCVD); resistive switching; thin film; valence-change memory; Introduction Resistive switching (RS) denotes the phenomena occurring in capacitor-like heterostructures (metal
  • substrate surface. The main issues were Pt dewetting, the formation of pinholes at the LMO film, and/or LMO film cracking due to Pt grain evolution. The surface and the cross section of the heterostructures showing cracking of the sample, holes and Pt percolating to the surface are presented in Figure S1
  • , cracking or dewetting. Furthermore, TEM cross-section observation of the LMO films was performed for strategies I and III, which correspond to the extreme cases (Figure 4). The cross-section images corroborated that in both heterostructures the Pt layer is continuous and stable as required; neither
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Published 07 Feb 2019

Surface plasmon resonance enhancement of photoluminescence intensity and bioimaging application of gold nanorod@CdSe/ZnS quantum dots

  • Siyi Hu,
  • Yu Ren,
  • Yue Wang,
  • Jinhua Li,
  • Junle Qu,
  • Liwei Liu,
  • Hanbin Ma and
  • Yuguo Tang

Beilstein J. Nanotechnol. 2019, 10, 22–31, doi:10.3762/bjnano.10.3

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  • with them [6][7][8][9][10][11][12]. Research conducted to date shows that the fluorescence intensity of QDs changes when other chemical materials or ions are added. The CdSe/ZnS heterostructures of QDs are of interest due to their high quantum efficiency [13][14][15]. Furthermore, the heterostructure
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Published 03 Jan 2019

Variation of the photoluminescence spectrum of InAs/GaAs heterostructures grown by ion-beam deposition

  • Alexander S. Pashchenko,
  • Leonid S. Lunin,
  • Eleonora M. Danilina and
  • Sergei N. Chebotarev

Beilstein J. Nanotechnol. 2018, 9, 2794–2801, doi:10.3762/bjnano.9.261

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  • their isovalent doping with bismuth on the photoluminescence properties of InAs/GaAs heterostructures. The experimental samples were grown by ion-beam deposition. We showed that using three vertically stacked layers of InAs quantum dots separated by thin GaAs barrier layers was accompanied by a red
  • -shift of the photoluminescence peak of InAs/GaAs heterostructures. An increase in the thickness of the GaAs barrier layers was accompanied by a blue shift of the photoluminescence peak. The effect of isovalent Bi doping of the GaAs barrier layers on the structural and optical properties of the InAs/GaAs
  • heterostructures was investigated. It was found that the Bi content up to 4.96 atom % in GaAs decreases the density of InAs quantum dots from 1.53 × 1010 to 0.93 × 1010 cm−2. In addition, the average lateral size of the InAs quantum dots increased from 14 to 20 nm, due to an increase in the surface diffusion of In
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Published 02 Nov 2018

Two-dimensional semiconductors pave the way towards dopant-based quantum computing

  • José Carlos Abadillo-Uriel,
  • Belita Koiller and
  • María José Calderón

Beilstein J. Nanotechnol. 2018, 9, 2668–2673, doi:10.3762/bjnano.9.249

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  • band gaps range from millielectronvolts to a few electronvolts. They can also be stacked in van der Waals heterostructures [22][24][25] favoring miniaturization and device integration. Incorporation of dopants affects the properties of isolated or stacked monolayers [26][27], as they do in bulk systems
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Published 12 Oct 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

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  • shown in Figure 9, to appear later. 2.3.3 Deposition of 3D heterostructures A whole range of new applications becomes feasible if the patterning algorithm is extended to fabricate 3D heterostructures. This, however, introduces additional complexity in the deposition process, which we briefly discuss
  • especially challenging to get nicely connected edges. 3.4.1 Two-material heterostructures In section 2.3.3 the possibility to deposit 3D heterostructures using different precursors in sequence has been alluded to. In Figure 13 we present an example of a 2 × 2 array of nanotrees, where the edges consist of
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Published 27 Sep 2018

Hierarchical heterostructures of Bi2MoO6 microflowers decorated with Ag2CO3 nanoparticles for efficient visible-light-driven photocatalytic removal of toxic pollutants

  • Shijie Li,
  • Wei Jiang,
  • Shiwei Hu,
  • Yu Liu,
  • Yanping Liu,
  • Kaibing Xu and
  • Jianshe Liu

Beilstein J. Nanotechnol. 2018, 9, 2297–2305, doi:10.3762/bjnano.9.214

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  • . Herein, Ag2CO3 nanoparticles were in situ formed on Bi2MoO6 microflowers to produce Ag2CO3/Bi2MoO6 heterostructures via a facile procedure. The morphologies, phases, chemical compositions, and optical properties of Ag2CO3/Bi2MoO6 were examined by multiple characterization techniques. The Ag2CO3/Bi2MoO6
  • heterostructures exhibited substantially improved performance in the removal of industrial dyes (rhodamine B (RhB), methyl orange (MO), and methyl blue (MB)), and the antibiotic tetracycline hydrochloride (TC), compared with bare Bi2MoO6 and Ag2CO3 under visible-light irradiation. The enhancement of activity was
  • . Herein, we synthesized flower-like Ag2CO3/Bi2MoO6 heterostructures, in which Ag2CO3 nanoparticles were evenly anchored on Bi2MoO6 microflowers to construct novel hierarchical heterojunction photocatalysts by via in situ precipitation. The photocatalytic properties of Ag2CO3/Bi2MoO6 was measured regarding
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Published 27 Aug 2018

Influence of the thickness of an antiferromagnetic IrMn layer on the static and dynamic magnetization of weakly coupled CoFeB/IrMn/CoFeB trilayers

  • Deepika Jhajhria,
  • Dinesh K. Pandya and
  • Sujeet Chaudhary

Beilstein J. Nanotechnol. 2018, 9, 2198–2208, doi:10.3762/bjnano.9.206

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  • . There are theoretical studies that suggest the possibility of manipulating the AF moment by spin transfer torque [12][13][14]. Only recently, FM/AF (NiO, IrMn)/heavy metal heterostructures have been extensively studied to demonstrate the efficient spin current transfer across the AF layer mediated by AF
  • transport through metallic IrMn layers of up to 3 nm of thickness via AF spin excitations has also been previously reported in Pt/IrMn/YIG heterostructures using spin-torque FMR [17]. Also, a highly efficient spin current transfer from Y3Fe5O12 (YIG) into NiO and subsequent spin propagation in NiO with spin
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Published 20 Aug 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

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Published 13 Aug 2018

The role of the Ge mole fraction in improving the performance of a nanoscale junctionless tunneling FET: concept and scaling capability

  • Hichem Ferhati,
  • Fayçal Djeffal and
  • Toufik Bentrcia

Beilstein J. Nanotechnol. 2018, 9, 1856–1862, doi:10.3762/bjnano.9.177

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  • limitations by proposing new designs based on heterostructures, gate engineering and high-k dielectrics [9][10][11][12]. Nanoscale DG TFETs are believed to face an upward amendment to meet the difficulty of decreasing the huge thermal budget required for the formation of the gated p-i-n diode structure
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Published 22 Jun 2018
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