bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimized electromagnetic wave absorption of α-Fe2O3@MoS2 nanocomposites with core–shell structure
Authors: Wu Mei , Wang Hongchang , Liang Xiaohui , Wang Dunhui 
Published: December 2022

Abstract
Core–shell structures and interfacial polarization are of great significance to meet the diversified requirements of microwave attenuation. Herein, α-Fe2O3@MoS2 nanocomposites are fabricated via a simple two-step hydrothermal process, in which MoS2 nanosheets as the shell are self-assembled and α-Fe2O3 microdrums are used as the core to constitute a special flower-like morphology with core–shell structure. This structure can provide more interface contact to achieve strong interfacial polarization and possibly offer more multiple reflection and scattering of electromagnetic waves. Furthermore, the microwave dissipation performances of α-Fe2O3@MoS2 nanocomposites can be significantly improved through construction of core–shell structure and flower-like morphology, controlling the content of α-Fe2O3 microdrums and adjusting the filler loading ratios. This work proves that the as-synthesized nanocomposites achieve excellent effective absorption bandwidth and outstanding electromagnetic wave absorption capabilities due to their special interfaces, core–shell structures and good impedance matching conditions. Therefore, α-Fe2O3@MoS2 nanocomposites are expected to be a novel and desirable candidate for high-performance electromagnetic wave absorbers.
Graphene enhanced flexible piezoelectric transducers for dynamic strain measurement: from material preparation to application
Authors: He Jingjing , Fang Ziwei , Gao Chenjun , Zhang Wenxi , Guan Xuefei , Lin Jing 
Published: December 2022

Abstract
In this study, graphene particles are introduced to the lead magnesium niobate-lead titanate and polyvinylidene fluoride (PVDF) to form a flexible ternary composite. The graphene concentration is rigorously designed and morphologically optimized, warranting good piezoelectric and dielectric properties. The piezoelectric and dielectric performances are greatly increased compared with the pure PVDF films. Then a theoretical model is formulated to quantitatively interpret the graphene effect on the permittivity performance and to provide guidelines for the optimization of graphene volume fraction. Moreover, a simple and cost-effective technique is designed to package the composite film as a large-area, lightweight and flexible transducer. Several confirmatory experiments and a proof-of-concept test are performed based on the proposed flexible piezoelectric transducer to validate the capability of the dynamic strain sensing. By comparing with the results from conventional strain gauges and ceramic piezoelectric wafers, it is verified that the proposed flexible transducer has proven responsivity and precision in responding to quasi-static strain, medium-frequency vibration, and ultrasound. The great potential of the developed transducer for a wide range of applications including structural health monitoring and human motion detection has been demonstrated.
A battery-free music-driven humidity sensor for intelligent wearable sensing system in smart diaper
Authors: Peng Yifeng , Long Zhihe , Liang Shan , Zhong Tianyan , Chen Meihua , Xing Lili , Xue Xinyu 
Published: December 2022

Abstract
A potential intelligent multifunctional diaper with the integration of flexible sensors and data processing/transmitting units may have the functions of monitoring the urination of babies, detecting the physiological parameters and transmitting the information to the mobile terminal of their parents. Here, we present a battery-free music-driven humidity sensor for an intelligent wearable sensing system in a smart diaper. The working mechanism is based on the coupling of the triboelectric effect and the humidity-sensing process. Driven by baby-acceptable musical sound, the two layers of the device vibrate (resonance effect), and the triboelectric effect generates an electrical output. The output decreases with the increasing humidity, acting as both a power source and humidity-sensing signal. The sensor can be embedded in a diaper to monitor the urination of the baby, and a wireless transmitter is integrated in the system to upload the information. The present results can promote the development of the next generation of self-powered active sensors and expand the scope of battery-free sensing systems.
Rotational mirror–mirror entanglement via dissipative atomic reservoir in a double-Laguerre–Gaussian-cavity system
Authors: Wang Fei , Shen Kang , Xu Jun 
Published: December 2022

Abstract
We propose a new scheme to prepare macroscopic entanglement between two rotating mirrors using dissipative atomic reservoir in a double-Laguerre–Gaussian-cavity system. The two-level atomic system driven by a strong field, acts as a single pathway of Bogoliubov dissipation to push the two original cavity modes into the desirable entangled state under the near-resonant conditions. Successively, the photon–photon entanglement can be transferred to mirror–mirror entanglement through the exchange of orbital angular momentum. In essence, the macroscopic entanglement is originated from the dissipative atomic reservoir rather than the radiation torque, thereby it is usually robust against environmental noises. The present scheme provides a feasible way to realize stable entanglement between spatially separated mirrors with high capacity, which may find potential applications in remote quantum communications.
Potential of utilizing immiscible polymer blends as porous materials
Authors: Alsewailem Fares D , Alabbad Eman A 
Published: December 2022

Abstract
The goal of this research was to examine the ability of commodity polymer blends to be used as low cost porous materials as a replacement for costly porous materials such as activated carbon. Three blend systems were prepared based on high-density polyethylene (HDPE) and polystyrene (PS) as major phases and polyvinyl alcohol (PVA) and PS as minor phases. All the blend systems were prepared at 10 wt% of the minor phase with melt blending method using conventional polymer processing equipment. In order to enhance the porosity of the prepared blends, appropriate staining agent was applied to partially remove the minor phase out of the prepared blend samples. PV was stained with water while PS was stained with ethyl acetate (EAC). It was seen that, by the result of this study, the satined blend system of HDPE/PVA showed best surface and mechanical properties. Amount of adsorbed nitrogen was above 18 cm3 g−1 at a relative pressure of one for the stained HDPE/PVA and PS/PVA. This may introduce a cost effective polymer blend material that may be used for moisture or gas storage.
Conservation laws of optical Bloch equations for the tripod scheme - contribution of double dark-state
Authors: Dimitrijević Jelena , Jelenković Branislav M , Arsenović Dušan 
Published: December 2022

Abstract
Results are presented for the conservation laws (CLs) of the optical Bloch equations (OBEs) for the 4-level tripod atomic scheme under the action of three laser fields. CLs are constructed for OBEs that include the spontaneous emission, collisional broadening and time of flight relaxation, and also without these effects, i.e. for the Liouville von Neumann equation (LNE). We used the direct method to construct CLs as the linear combinations of the density matrix elements and their products. These CLs were in turn used to obtain another set of CLs that explicitly depend on time and stand with relaxation due to the time of flight in OBEs. We also constructed CLs for OBEs representing special case of the tripod system that supports the coherent population trapping (CPT), the phenomenon characterized by the ‘dark-state’. Tripod scheme has two dark-states with the same Hamiltonian eigenvalue. As we explain, this peculiarity of tripod scheme contributes to additional CLs of both LNE and OBEs with all relaxation and decoherence effects included, when CPT is present.
Three-dimensional fourier imaging of thousands of individual solid-state quantum bits – a tool for spin-based quantum technology
Authors: Artzi Yaron , Zgadzai Oleg , Solomon Benjamin , Blank Aharon 
Published: December 2022

Abstract
Nitrogen vacancies in diamond (NVs) are frequently considered as possible candidates to constitute the building blocks of spin-based quantum computers. The main caveats to this approach are the lack of a reliable process to accurately place many NVs in close proximity to each other (∼10–20 nm) to enable an adequate spin-spin interaction; and the inability to read out and selectively manipulate the quantum states of many such closely spaced NVs. A possible approach to overcome these issues includes the following: (i) making use of a diamond dense with NVs in random (‘as-produced’) 3D positions; (ii) mapping out their individual locations at high spatial resolution (in 3D); (iii) employing techniques for selective spin manipulation based on the mapped 3D locations of the NVs; and (iv) making use of imaging techniques to read out the quantum state of the NVs. Within this grand vision, we present here a tool that can support this scheme—namely, an approach to the efficient high accuracy 3D mapping of many thousands of individual NVs in a diamond via magnetic resonance imaging (MRI). In the present work, the NVs’ spacings and the corresponding imaging resolution are in the submicron-scale, but the same approach can be scaled down to support a resolution lower than 10 nm in diamonds with dense NVs, as is required for practical quantum computing applications.
Preparation of lead hexaferrite filled PVA- PVP nanocomposite and a study of its structural features, optical and dielectric properties
Authors: Abomostafa H M , Abouhaswa A S , Rabiea E A 
Published: December 2022

Abstract
Polymer blend films based on PVA-PVP filled with PbFe12O19 hexa-ferrites nanoparticles were created by solution casting technique. XRD, HRTEM, FESEM, FTIR, UV–vis spectroscopy and Broad-band dielectric spectroscopy were used to examine the properties of the prepared polymer composite films. X-ray diffraction pattern of the powder confirmed the formation of PbFe12O19 with hexagonal phase and that for the films confirmed the incorporation of the PbFe12O19 nanoparticles in the PVA-PVP blends. HRTEM confirms the formation of hexagonal nanoparticles with average size ranged from 7 nm to 21 nm. Field emission scanning electron microscopy (FESEM) studied the morphology of the nanocomposite films. There are noticeable variations in FT-IR spectra that confirm the incorporation of PbFe12O19, NPs in PVA-PVP blend. The absorbance was found to increase with red shift in the ultraviolet-visible region while the transmittance decreases with increasing PbFe12O19, nanoparticles. By incorporating, PbFe12O19 the direct optical gap and indirect optical gap gradually decreased from 5.20 eV to 4.44 eV and 4.97 eV to 4.34 eV, respectively while the Urbach energy increases from 0.274 eV to 0.678 eV. According to the Wemple-Didomenico single oscillator model, the optical dispersion parameters have been examined and are found to be strongly affected by PbFe12O19, loading. Additionally, the nanocomposite film containing 7.5% PbFe12O19, demonstrated outstanding optical shielding. The complex dielectric constant (ε*), complex electric modulus (M*) and electrical conductivity, of NCPs materials have been studied with the frequency changing from 0.1 Hz to 10 MHz. The real permittivity (

ε
′

) of PVA-PVP blend polymer film increased while the real electric modulus (M′) is found to decrease by the incorporation of PbFe12O19, nanoparticles up to 2.5 wt.% and the imaginary component of permittivity follows the same pattern of

ε
′
.

The examined nanocomposite films show promise for flexible optoelectronics, photosensors, optical shielding and nano-dielectric materials.
Effects of surface vacancy-adatom pair formation on PFC tungsten surface morphological response
Authors: Chen Chao-Shou , Dasgupta Dwaipayan , Weerasinghe Asanka , Hammond Karl D. , Wirth Brian D. , Maroudas Dimitrios 
Published: December 2022

Abstract
We report a simulation study of the effect of He-irradiation-induced surface vacancy-adatom pair formation on the surface morphological evolution of plasma-facing component (PFC) tungsten and examine a number of factors that impact such evolution. Our analysis is based on self-consistent dynamical simulations according to an atomistically-informed, continuum-scale surface evolution model that has been developed following a hierarchical multiscale modeling strategy and can access the spatiotemporal scales of relevance to fuzz formation. The model accounts for the flux of surface adatoms generated as a result of the surface vacancy-adatom pair formation effect upon He implantation, which contributes to the anisotropic growth of surface nanostructural features due to the different rates of adatom diffusion along and across step edges of islands on the tungsten surface. We have carried out atomic-scale computations of optimal diffusion pathways along and across island step edges on the W(110) surface and calculated Ehrlich–Schwoebel (ES) barriers in adatom diffusion along and across such step edges. This aspect of surface adatom diffusion contributes to anisotropic surface atomic fluxes, terrace and step diffusive currents, and has been incorporated into our PFC surface evolution model, which predicts the formation of preferentially aligned nanoridge stripe patterns on the PFC surface. We establish that these anisotropic diffusive currents accelerate nanotendril growth on the PFC surface and the onset of surface nanostructure pattern formation. We also explore systematically the dependence of the PFC surface morphological response on the surface temperature and He ion incident flux, characterize in detail the resulting surface topographies and growth kinetics, and compare the predicted surface morphologies with experimental observations. Our simulation predictions for the emerging surface nanostructure patterns under certain plasma exposure conditions are consistent with experimental findings in the literature.
Compatibility of large ELM control and stable partial detachment with neon/argon seeding in EAST
Authors: Li K. , Lin X. , Yang Z. , Yang Q. , Xu G. , Meng L. , Wang Y. , Lan H. , Zhang B. , Xu L. , Wu K. , He T. , Xu J. , Wu J. , Ding F. , Duan Y. , Mao S. , Zang Q. , Zhang L. , Zhang T. , Wang F. , Wang L. , Luo G.-N. 
Published: December 2022

Abstract
It is necessary to achieve simultaneous exhaust of excessive transient and steady-state heat fluxes on the divertor target for the divertor protection in the future fusion reactors. The sustained large ELM control and stable partial detachment have been achieved concurrently with argon (Ar) or neon (Ne) seeding in EAST. With Ne seeding, the large ELMs with frequency f
ELM ∼ 100 Hz disappear and a stable ELM-free state with H
98,y2 > 1 is maintained. Meanwhile, the electron temperature T
et around the lower outer strike point decreases from more than 70 eV during the large ELM burst to less than 5 eV in the stable ELM-free phase. In addition, a slight improvement of plasma confinement is observed in the partially detached state, mainly attributed to the increased electron density n
e and ion temperature T
i in the core region. In the pedestal region, the density gradient and the electron temperature show subtle variation. The effective charge number Z
eff increases significantly after Ne seeding, leading to a decrease in the edge bootstrap current and the pedestal pressure gradient, and thus the stabilization of ELMs. With Ar seeding, the large ELMs are also suppressed at first, but soon transit to type-III ELMs with a high f
ELM ∼ 1 kHz, highly correlated with the energy confinement degradation. The steady-state and transient heat fluxes on the divertor can be both well reduced with Ar/Ne seeding in EAST.
10 years of Aichi Synchrotron Radiation Center Impact on industrial and academic research and developments
Authors: Kunieda H. , Takashima Y. , Okajima T. , Takeda Y. 
Published: December 2022

Abstract
The synchrotron light source with the electron energy of 1.2 GeV is operated by Aichi Synchrotron Radiation Centre (AichiSR) in Aichi prefecture, Japan. The light has been offered to industrial and academic users since March 2013 in the top-up operation mode to maintain a constant current of 300 mA. This facility was established by Aichi prefecture, universities, and industries with support of government. Major purpose of the light source is to support research and development activities of industries and academia mostly in the area, which is the heart land of manufacturing of Japan. This paper describes evolution of the beamlines and recent research results and their impact to the society.
Permanent Magnet phase shifters for FLASH2020+ FEL
Authors: N’gotta P , Vagin P , Tischer M 
Published: December 2022

Abstract
The development of a simple and compact permanent magnet (PM) phase shifter is presented in this paper. The design is based on four PM blocks per girder (8 PM blocks in total), and uses only one type PM block with horizontal magnetization and 15mm length. The magnetic field provides a net zero and second field integral and a phase integral of 2 · 10–6
T
2
m
3 for 60mm overall magnet length. The study of the numerical model with Radia shows that this design is mainly sensitive to angular magnetization errors. The correction strategy is based on pairing the PM blocks in order to cancel the sum of magnetization angle error, and the remaining magnetic field error is corrected with a stack of magic fingers located around the magnet. Finally, a prototype was built, and the magnetic measurements results are presented here.
Development of an APPLE-III undulator for FLASH-2
Authors: Tischer M , Bienert H , Götze K , Meissner D , Neumann P , N’Gotta P , Ramm T , Schöps A , Talkovski P , Telawane S , Vagin P 
Published: December 2022

Abstract
The use of circularly polarized soft X-rays at the FLASH-FEL at DESY will be a very versatile tool for investigation of dynamic properties in nanomagnetism. For that purpose, the development of a variable polarization undulator was started to provide an afterburner downstream of the FLASH2 SASE undulators. It will serve to produce circularly polarized light with a wavelength of 1.33 nm to 1.77 nm (890 eV - 700 eV) to investigate the L-edges of Fe, Co, and Ni. This wavelength range together with the future maximum beam energy of 1.35 GeV at FLASH leaves only a small and ambitious parameter window for the undulator if a noteworthy tunability range shall be provided.
We report on design and development of an APPLE-III undulator with 17.5 mm period length operating at a minimum magnetic gap of 8 mm which will make use of a magnetic force compensation scheme. A short prototype has been built to verify and iterate both the mechanical and magnetic concept. Details on the keeper design, results of the magnetic measurements and the tuning concept will be presented.
The vacuum chamber for the APPLE-X undulators at the European XFEL
Authors: La Civita D. , Casalbuoni S. , Karabekyan S. , Planas M. , Sinn H. , Wohlenberg T. , Wünschel M. , Yang F. 
Published: December 2022

Abstract
Thanks to the installation of four APPLE X helical undulators, the SASE3 soft X-ray beamline at European XFEL will provide to the experimental stations the polarization control of the X-rays. The helical undulators are located downstream with respect to the already existing planar undulators. The design of the magnetic active parts and of the helical undulator support structure requires a new design of the vacuum chamber and its alignment system. This contribution describes the mechanical design, production process, UHV qualification process and alignment of the vacuum chamber.
X-ray scattering at beamline BL2 of DELTA: Studies of lysozyme-lysozyme interaction in heavy water and structure formation in 1-hexanol
Authors: Dargasz M , Bolle J , Faulstich A , Schneider E , Kowalski M , Sternemann C , Savelkouls J , Murphy B , Paulus M 
Published: December 2022

Abstract
The experimental station of the bending magnet beamline BL2 of the Dortmund Synchrotron Radiation Source DELTA has been reconstructed in order to enable small-angle X-ray scattering and wide-angle scattering studies with monochromatic beam. By using a multilayer monochromator with a bandwidth of 1.5%, it is possible to reach a photon energy of 12 keV at sufficiently high photon fluxes. The beamline layout is described and the experimental capabilities are discussed by giving two examples of typical experiments: (i) A dense lysozyme solution is studied using small-angle X-ray scattering in order to reveal to influence of pressure on the protein-protein interaction with heavy water as solvent. (ii) The dependency of the hydrogen-bond mediated structure formation on temperature and pressure is investigated in liquid 1-hexanol by wide-angle X-ray scattering.
A new beamline for hard X-ray tomographic microscopy at the Spanish Synchrotron ALBA
Authors: Mittone Alberto , Ribó Llibert , Patera Alessandra , Campmany Josep , Colldelram Carles , Nicolás Josep 
Published: December 2022

Abstract
The BL31-FaXToR is a new beamline currently under construction at the third generation synchrotron facility ALBA, dedicated to hard x-ray micro-tomography. The beamline will provide the opportunity to perform 3D imaging within sub-seconds time resolution, working under mono- or white-beam conditions. A dual detection system is foreseen at the top of an innovative end-station design in order to perform fast imaging with a multi-scale approach. In this paper, we provide an overview of the new beamline design and of the expected performances. Raytracing and phase-contrast imaging simulations have been used to optimize the optical design. The beamline will be fed by a 2.5T multipole wiggler with a critical energy of 14.7 keV. A double multilayer monochromator (DMM) covers an energy range between 8 to 50 keV with a bandwidth up to 3.5%. The DMM crystals can be shifted out of the beam path to operate in filtered white beam modality with higher energies spanning from 30 to 70 keV. Multiple filtering configurations will be used to optimize the spectra according to the specific experimental settings. The beamline will serve different scientific communities, including material science, biomedical, paleontology, earth science, cultural heritage etc. FaXToR is expected to start user operations by the beginning of 2024.