Vortex lattices of layered HTSCs at different vortex–vortex interaction potentials

• Valerii P. Lenkov,
• Anastasia N. Maksimova,
• Anna N. Moroz and
• Vladimir A. Kashurnikov

Beilstein J. Nanotechnol. 2025, 16, 362–370, doi:10.3762/bjnano.16.27

• with respect to the superconducting planes. The phase diagram of the vortex system becomes even more complex in an inclined magnetic field. As studies [9][10][11] have shown, the structure of the vortex lattice depends on the anisotropy parameter of the superconductor in the form of the Josephson

• length λJ = γs, where s is the distance between the superconducting planes, γ is the anisotropy parameter, and λ is the London penetration depth of the magnetic field. When the ratio λ/λJ < 0.46, crossed lattices of Abrikosov and Josephson vortices (vortex chains) are observed; at λ/λJ > 0.46, the

• method within the framework of a two-dimensional model of a layered HTSC [24][25][26]. Most of the HTSCs applicable in practice are strongly anisotropic substances characterized by the anisotropy parameter γ > 10. Examples of such HTSCs are YBa2Cu3O7−δ (γ ≈ 10) and Bi2Sr2CaCu2O8−δ (γ ≈ 200) [1]. Such

Theoretical study of the electronic and optical properties of a composite formed by the zeolite NaA and a magnetite cluster

• Joel Antúnez-García,
• Roberto Núñez-González,
• Vitalii Petranovskii,
• H’Linh Hmok,
• Armando Reyes-Serrato,
• Fabian N. Murrieta-Rico,
• Mufei Xiao and
• Jonathan Zamora

Beilstein J. Nanotechnol. 2025, 16, 44–53, doi:10.3762/bjnano.16.5

• bandgap value will be consistent with that observed in Figure 6a. Figure 6b shows that when the cluster is introduced into the zeolite, the relative permittivity of the NaA-M composite exhibits a certain degree of anisotropy. In particular, for the range from 0 to 8 eV, the component ε1yy, both real and

Nanoarchitectonics with cetrimonium bromide on metal nanoparticles for linker-free detection of toxic metal ions and catalytic degradation of 4-nitrophenol

• Akash Kumar and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 1312–1332, doi:10.3762/bjnano.15.106

• environments or functional groups [3]. Surfactants bind to metal surfaces and create a stable colloidal solution by preventing the nanoparticles from aggregation or clustering [4]. CTAB is a widely used cationic surfactant that provides nanoparticle ionic stability and anisotropy [5]. Although CTAB delivers

The role of a tantalum interlayer in enhancing the properties of Fe₃O₄ thin films

• Hai Dang Ngo,
• Vo Doan Thanh Truong,
• Van Qui Le,
• Hoai Phuong Pham and
• Thi Kim Hang Pham

Beilstein J. Nanotechnol. 2024, 15, 1253–1259, doi:10.3762/bjnano.15.101

• samples are summarized in Table 3. Morphology, microstructure, and anisotropy mechanisms significantly impact the magnetic properties of ferrite materials [38]. It is known that antiphase boundaries (APBs) and grain size in Fe3O4 thin films, which are strongly influenced by substrate or buffer layer, can

Interface properties of nanostructured carbon-coated biological implants: an overview

• Mattia Bartoli,
• Francesca Cardano,
• Erik Piatti,
• Stefania Lettieri,
• Andrea Fin and
• Alberto Tagliaferro

Beilstein J. Nanotechnol. 2024, 15, 1041–1053, doi:10.3762/bjnano.15.85

• graphene is significantly complicated by the extreme anisotropy intrinsic to its crystal structure and its large compositional and structural variability [39]. Beyond the obvious consequences arising from the chemical composition, some of the main aspects affecting electronic transport in graphene are

• another (inter-layer transport) and is the source of the large anisotropy typically displayed between in-plane and out-of-plane carrier mobilities [42]. Carrier injection is usually determined by energy band alignment and interface transparency, and it is limited by the number of available conduction

Atomistic insights into the morphological dynamics of gold and platinum nanoparticles: MD simulations in vacuum and aqueous media

• Evangelos Voyiatzis,
• Eugenia Valsami-Jones and
• Antreas Afantitis

Beilstein J. Nanotechnol. 2024, 15, 995–1009, doi:10.3762/bjnano.15.81

• . The tessellation is carried out using the Qhull library [78]. The shape of a NP is quantified by the asphericity, b, the acylindricity, c, and the relative shape anisotropy, κ2, parameters [79]. Let denote the eigenvalues of the gyration tensor. The shape parameters are given by: Complementary

• is considerably stronger than on the temperature of the NP. The modifications in the shape of the NPs are tracked by the asphericity, acylindricity, and shape anisotropy parameters. The temperature dependence of these three parameters for the Au and Pt NPs with diameters of 1 nm (i.e., the smallest

• possesses, the acylindricity is zero, while the relative shape anisotropy is one. We observe a distinct behaviour of the small NPs compared to the large ones. In the latter case, the variation in the shape is weak, and minor changes occur only near the transition temperature identified by the Berry

Effects of cutting tool geometry on material removal of a gradient nanograined CoCrNi medium entropy alloy

• Yu-Sheng Lu,
• Yu-Xuan Hung,
• Thi-Xuyen Bui and
• Te-Hua Fang

Beilstein J. Nanotechnol. 2024, 15, 925–940, doi:10.3762/bjnano.15.76

• the grain boundaries of the sample forms a clear network of contour maps [30]. The anisotropy of the grains causes anisotropic deformation and increases the surface dispersion density. Therefore, the stress required to promote plastic deformation rises more at grain boundaries than inside grains [23

Elastic modulus of β-Ga₂O₃ nanowires measured by resonance and three-point bending techniques

• Annamarija Trausa,
• Sven Oras,
• Sergei Vlassov,
• Mikk Antsov,
• Tauno Tiirats,
• Andreas Kyritsakis,
• Boris Polyakov and
• Edgars Butanovs

Beilstein J. Nanotechnol. 2024, 15, 704–712, doi:10.3762/bjnano.15.58

• , studies by Luan et al. [23] have revealed the elastic anisotropy in β-Ga2O3, highlighting the strong directional dependence of Young’s modulus. Available studies hint that various factors could strongly influence the mechanical properties of Ga2O3 one-dimensional nanostructures, which merits to be

• , prompted various potential explanations for this variation. Firstly, both experimental and theoretical investigations have shown that β-Ga2O3 elastic characteristics exhibit significant anisotropy [13][26][27]. This indicates that Young's modulus is strongly dependent on the direction of crystalline

• orientation (e.g., E100 = 138 GPa, E010 = 263 GPa, E001 = 228 GPa [26]) emphasising directional differences in the mechanical properties of the material. Since our as-grown NWs tend to exhibit various growth directions, as was determined in the TEM studies, this elasticity anisotropy could be one of the

Gold nanomakura: nanoarchitectonics and their photothermal response in association with carrageenan hydrogels

• Nabojit Das,
• Vikas,
• Akash Kumar,
• Sanjeev Soni and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 678–693, doi:10.3762/bjnano.15.56

• gold nanomakura within a 600–700 nm wavelength. The aspect ratio as well as anisotropy of synthesized gold nanomakura can influence photothermal response upon near-infrared irradiation. The role of carbon tail length was evident via absorption peaks obtained from longitudinal surface plasmon resonance

• hydrogels for enabling usage on nanophotonic, photothermal, and bio-imaging applications. Keywords: anisotropy; hydrogel; kappa-carrageenan; metal nanoparticles; nanoarchitectonics; nanomakura; photothermal properties; surfactants; Introduction Nanoarchitectonics is the fabrication of functional material

• . Plasmon resonance in spherical nanoparticles can be stretched over a relatively small wavelength range by changing the diameter, whereas casting anisotropy serves an extra degree of freedom for controlling the plasmon band over a range of visible to infrared (IR) spectrum [4]. Gold nanoparticles are well

Directed growth of quinacridone chains on the vicinal Ag(35 1 1) surface

• Niklas Humberg,
• Lukas Grönwoldt and
• Moritz Sokolowski

Beilstein J. Nanotechnol. 2024, 15, 556–568, doi:10.3762/bjnano.15.48

• orientation. After deposition at 400 K, only two of the above four azimuthal orientations are observed. Furthermore, the deposition at 500 K leads to heterochiral chains in a commensurate structure (β-phase) that also exhibits a strong anisotropy, that is, two domains are favored over the other two. In both

• very similar to the one of the QA β-phase on Ag(100) but exhibits a clear anisotropy. Roughly half of the spots are more intense than the other half. This LEED image was measured under an in-phase condition for the specular spot with respect to monoatomic Ag steps. (b) Simulated LEED pattern of the β

Photocatalytic degradation of methylene blue under visible light by cobalt ferrite nanoparticles/graphene quantum dots

• Vo Chau Ngoc Anh,
• Le Thi Thanh Nhi,
• Le Thi Kim Dung,
• Dang Thi Ngoc Hoa,
• Nguyen Truong Son,
• Nguyen Thi Thao Uyen,
• Nguyen Ngoc Uyen Thu,
• Le Van Thanh Son,
• Le Trung Hieu,
• Tran Ngoc Tuyen and
• Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 475–489, doi:10.3762/bjnano.15.43

• the most important soft-magnetic ferrite materials because of its ferromagnetic properties, high magnetic and thermal stability, low conductivity, and anisotropy [6]. The controllable synthesis of spherical CF nanoparticles from corresponding salts and Arabic gum as surfactant agent using a

Modulated critical currents of spin-transfer torque-induced resistance changes in NiCu/Cu multilayered nanowires

• Mengqi Fu,
• Roman Hartmann,
• Julian Braun,
• Sergej Andreev,
• Torsten Pietsch and
• Elke Scheer

Beilstein J. Nanotechnol. 2024, 15, 360–366, doi:10.3762/bjnano.15.32

• stiffness, the dipolar stray field, and the anisotropy field caused by the spin–orbit interaction [34]. Since the magnetization of layer 1 () and layer 3 () are both parallel to the applied magnetic field (here: positive), the exchange stiffness as well as the dipolar stray field on layer 2 point in the

Ferromagnetic resonance spectra of linear magnetosome chains

• Elizaveta M. Gubanova and
• Nikolai A. Usov

Beilstein J. Nanotechnol. 2024, 15, 157–167, doi:10.3762/bjnano.15.15

• chain, the distance between the centers of neighboring particles, the mutual orientation of the cubic axes of particle anisotropy, and the value of the magnetic damping constant is studied. It is shown that FMR spectra of non-oriented chain assemblies depend on the average particle diameter at a fixed

• of magnetic anisotropy, the direction of the particle easy anisotropy axes, and other parameters. In addition, the FMR spectrum is sensitive to the presence of magnetostatic interactions in dense assemblies of magnetic nanoparticles. Thus, ferromagnetic resonance spectroscopy is a promising technique

• chain, that is, about the particle diameters, the number of particles in the chain, the characteristic distance between the particle centers, and the mutual orientation of the particle cubic anisotropy axes, is completely lost. In addition, in the approach [22][23][24][25], only the position of the

In situ optical sub-wavelength thickness control of porous anodic aluminum oxide

• Aleksandrs Dutovs,
• Raimonds Popļausks,
• Oskars Putāns,
• Vladislavs Perkanuks,
• Aušrinė Jurkevičiūtė,
• Tomas Tamulevičius,
• Uldis Malinovskis,
• Iryna Olyshevets,
• Donats Erts and
• Juris Prikulis

Beilstein J. Nanotechnol. 2024, 15, 126–133, doi:10.3762/bjnano.15.12

• achieve precise optical characterization, one could employ spectroscopic ellipsometry (SE) with more refined division into sub-layers [26] and consider additional material properties, such as the anisotropy of PAAO [27] and the optical dispersion of the refractive index (RI) of Al2O3 [28]. However, for

The microstrain-accompanied structural phase transition from h-MoO₃ to α-MoO₃ investigated by in situ X-ray diffraction

• Zeqian Zhang,
• Honglong Shi,
• Boxiang Zhuang,
• Minting Luo and
• Zhenfei Hu

Beilstein J. Nanotechnol. 2023, 14, 692–700, doi:10.3762/bjnano.14.55

• increase of microstrain during the h-MoO3→α-MoO3 transition. Note that since the thermal shock properties of a material are proportional to the CTEs, large values of CTE and the anisotropy of the hexagonal phase h-MoO3 may increase thermal shock, leading to fatigue or damage to devices. Microscopic view on

ZnO-decorated SiC@C hybrids with strong electromagnetic absorption

• Liqun Duan,
• Zhiqian Yang,
• Yilu Xia,
• Xiaoqing Dai,
• Jian’an Wu and
• Minqian Sun

Beilstein J. Nanotechnol. 2023, 14, 565–573, doi:10.3762/bjnano.14.47

• that there are some fluctuations in the high-frequency range (10–16 GHz), which are called Debye relaxation peaks. These peaks are caused by shape anisotropy or surface polarization. For the SCZ samples, the unique core–shell structure and the interface polarization effect between different phases may

Specific absorption rate of randomly oriented magnetic nanoparticles in a static magnetic field

• Ruslan A. Rytov and
• Nikolai A. Usov

Beilstein J. Nanotechnol. 2023, 14, 485–493, doi:10.3762/bjnano.14.39

• nanoparticles with uniaxial magnetic anisotropy randomly oriented in a solid matrix. The saturation magnetization of particles and the magnetic anisotropy constant are taken to be Ms = 350 emu/cm3 and K1 = 105 erg/cm3, respectively [27]. The range of nanoparticle diameters studied is D = 18–50 nm, the

• completely at Hdc = 400 Oe. The functions SAR(Hdc) for randomly oriented assemblies of nanoparticles with diameters D = 40 and 50 nm behave similarly. To explain this effect, Figure 3 shows the magnetization dynamics of a nanoparticle with D = 30 nm and with the easy anisotropy axis parallel to the ac field

• θ and φ (in radians) in a dc magnetic field directed perpendicular to the particle easy anisotropy axis. Figure 4a and Figure 4b show the total energy of the particle in the absence of a dc magnetic field, Hdc = 0, at times when the current ac magnetic field is zero or equal to its maximum value

Plasmonic nanotechnology for photothermal applications – an evaluation

• A. R. Indhu,
• L. Keerthana and
• Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

Upper critical magnetic field in NbRe and NbReN micrometric strips

• Zahra Makhdoumi Kakhaki,
• Antonio Leo,
• Federico Chianese,
• Loredana Parlato,
• Giovanni Piero Pepe,
• Angela Nigro,
• Carla Cirillo and
• Carmine Attanasio

Beilstein J. Nanotechnol. 2023, 14, 45–51, doi:10.3762/bjnano.14.5

• in both cases. The temperature dependence of Hc2 for NbRe and NbReN is displayed, respectively, in Figure 3a and Figure 3b, where both Hc2⟂(T) and Hc2∥(T) are reported. In the insets of Figure 3a and Figure 3b, the temperature dependence of the anisotropy coefficient γ(T) = Hc2∥(T)/Hc2⟂(T) is given

• squares and red circles indicate the temperature dependence of Hc2⟂ and Hc2∥, respectively. The insets show the behavior of the anisotropy coefficient γ as a function of the temperature. (a, b) Temperature dependence of the perpendicular upper critical field of (a) the NbRe and (b) the NbReN microstrip

The influence of structure and local structural defects on the magnetic properties of cobalt nanofilms

• Alexander Vakhrushev,
• Aleksey Fedotov,
• Olesya Severyukhina and
• Anatolie Sidorenko

Beilstein J. Nanotechnol. 2023, 14, 23–33, doi:10.3762/bjnano.14.3

• -hand side are the Zeeman and exchange interactions, respectively, the next two terms describe magnetic anisotropy, followed by the terms responsible for the Dzialoshinsky–Moriya, magnetoelectric, and dipole interactions, respectively. The consideration of different types of interactions in a model

• emphasis at this stage was placed on the pairwise anisotropy model of Neel. The exchange interaction provides a natural connection between the spin and lattice degrees of freedom due to the dependence of the function J on the interatomic distance. This function determines the intensity of the interaction

• and promising magnetic nanomaterials. Magnetic crystallographic anisotropy arises on spin–orbit interaction of atoms. As a consequence, this type of interaction should be separately taken into account when constructing theoretical models and conducting numerical experiments. The type and parameters of

Structural studies and selected physical investigations of LiCoO₂ obtained by combustion synthesis

• Monika Michalska,
• Paweł Ławniczak,
• Tomasz Strachowski,
• Adam Ostrowski and
• Waldemar Bednarski

Beilstein J. Nanotechnol. 2022, 13, 1473–1482, doi:10.3762/bjnano.13.121

• dynamic Jahn–Teller effect. Below about 20 K the dynamic effect becomes static, and the spectra show a clear anisotropy due to static Jahn–Teller distortion. Experimental spectra obtained at 5 K (Figure 7) show that the EPR spectra for each sample consist of two different nickel complexes. From the

Density of states in the presence of spin-dependent scattering in SF bilayers: a numerical and analytical approach

• Tairzhan Karabassov,
• Valeriia D. Pashkovskaia,
• Nikita A. Parkhomenko,
• Anastasia V. Guravova,
• Elena A. Kazakova,
• Boris G. Lvov,
• Alexander A. Golubov and
• Andrey S. Vasenko

Beilstein J. Nanotechnol. 2022, 13, 1418–1431, doi:10.3762/bjnano.13.117

• discuss a ferromagnet with strong uniaxial anisotropy, in which case the perpendicular fluctuations of the exchange field are suppressed (αx ∼ 0). For simplicity, we also assume the ferromagnet with weak spin–orbit interactions and also neglect the spin–orbit scattering time αso. Finally, assuming αx

Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications

• Vishal Dutta,
• Ankush Chauhan,
• Ritesh Verma,
• C. Gopalkrishnan and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 1316–1336, doi:10.3762/bjnano.13.109

• acceptable rates of 522.44, 174.15, and 88.24 μmol·g−1·h−1, respectively, were reached under these conditions. These rates outperform those of other similar Bi-based semiconductor photocatalysts reported in the literature. To synthesize Bi-based photocatalysts with high anisotropy, hollow structures, or

Enhanced electronic transport properties of Te roll-like nanostructures

• E. R. Viana,
• N. Cifuentes and
• J. C. González

Beilstein J. Nanotechnol. 2022, 13, 1284–1291, doi:10.3762/bjnano.13.106

• the anisotropy of the Te crystal structure [20][21]. However, a fast Fourier transform (FFT) analysis of different areas of the HRTEM images (see Figure 3a) shows that the nanostructures are polycrystalline, with well-oriented large grains and rotated small grains at the edges. Small amorphous areas

Ultrafast signatures of magnetic inhomogeneity in Pd_1−xFe_x (x ≤ 0.08) epitaxial thin films

• Andrey V. Petrov,
• Sergey I. Nikitin,
• Lenar R. Tagirov,
• Amir I. Gumarov,
• Igor V. Yanilkin and
• Roman V. Yusupov

Beilstein J. Nanotechnol. 2022, 13, 836–844, doi:10.3762/bjnano.13.74

• polarization plane Δθ, which partially can originate from the pump-induced anisotropy, the responses were measured at two oppositely applied magnetic fields +H and −H. In this case, the contribution odd with respect to the sign of the field ΔθΚ = [Δθ(+H) − Δθ(−H)]/2 has a magnetic nature. To perform