Theoretical investigations of oxygen vacancy effects in nickel-doped zirconia from ab initio XANES spectroscopy at the oxygen K-edge

• Dick Hartmann Douma,
• Lodvert Tchibota Poaty,
• Alessio Lamperti,
• Stéphane Kenmoe,
• Abdulrafiu Tunde Raji,
• Alberto Debernardi and
• Bernard M’Passi-Mabiala

Beilstein J. Nanotechnol. 2022, 13, 975–985, doi:10.3762/bjnano.13.85

• Nanotechnologies, Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN), Brazzaville, Congo 10.3762/bjnano.13.85 Abstract In this study, we present theoretical X-ray absorption near-edge structure (XANES) spectra at the K-edge of oxygen in zirconia containing Ni dopant atoms and O vacancies at

• vacancies. In this system, each Ni atom is surrounded by two shells of O with tetrahedral geometry, in a similar way as in bulk cubic zirconia. The oxygen K-edge XANES spectrum of this configuration shows a pre-edge peak, which is attributable to dipole transitions from O 1s to O 2p states that are

• hybridized with unoccupied Ni 3d states. The intensity of this pre-edge peak, however, reduces upon the introduction of a single vacancy in the 2Ni-doped zirconia matrix. The corresponding ground state remains ferromagnetic, while one of the nickel atoms adopts a trigonal bipyramidal geometry, and the other

Solar-light-driven LaFe_xNi_1−xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

• Chao-Wei Huang,
• Shu-Yu Hsu,
• Jun-Han Lin,
• Yun Jhou,
• Wei-Yu Chen,
• Kun-Yi Andrew Lin,
• Yu-Tang Lin and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 882–895, doi:10.3762/bjnano.13.79

• ), Chengalpattu district, Kelambakkam, Tamil Nadu, 603103, India 10.3762/bjnano.13.79 Abstract LaFexNi1−xO3 perovskite oxides were prepared by the sol–gel method under various conditions, including different pH values (pH 0 and pH 7) and different calcination temperatures (500–800 °C) as well as different Fe/Ni

• decompose the methylene blue molecules. Accordingly, the synthesis condition of pH 0, calcination temperature at 700 °C, and Fe/Ni ratio = 7/3 could form LaFe0.7Ni0.3O3 perovskite oxides as highly efficient photocatalysts. Moreover, various conditions during the photocatalytic degradation were verified

• , methylene blue, and rhodamine B under visible light irradiation. Their optimal sample was LaFe0.85Cu0.15O3, which could remove dyes much more efficiently due to more generation of hydroxyl radicals than pure LaFeO3 [31]. Ni-doped LaFeO3 was ubiquitously employed as a photo/thermal catalyst or a catalyst

Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production

• Chun-Da Liao,
• Andrea Capasso,
• Tiago Queirós,
• Telma Domingues,
• Fatima Cerqueira,
• Nicoleta Nicoara,
• Jérôme Borme,
• Paulo Freitas and
• Pedro Alpuim

Beilstein J. Nanotechnol. 2022, 13, 796–806, doi:10.3762/bjnano.13.70

• ., Cu or Ni) to the desired target substrate (e.g., SiO2/Si, glass, or flexible polymers) often introduces inconsistencies among devices [10]. Various approaches have been developed to address this issue and establish a reproducible transfer process [11][12][13][14][15][16][17]. Among the many, the poly

• be considered: (i) metallic particles from the Cu or Ni etching process and (ii) PMMA residues after the removal and rinsing processes. Both contaminations are leading causes of undesired p-type doping in CVD graphene, accompanied by a deterioration of its electrical properties [19][20][21][22]. The

Recent advances in nanoarchitectures of monocrystalline coordination polymers through confined assembly

• Lingling Xia,
• Qinyue Wang and
• Ming Hu

Beilstein J. Nanotechnol. 2022, 13, 763–777, doi:10.3762/bjnano.13.67

• function is quite attractive because this function is versatile even for nanoparticles. Electrodes of sodium-ion batteries can be fabricated by using the Ni–CN–Ni colloids as glue. The contribution to the adhesion strength among 2D coordination polymers was generally considered to be van der Waals forces

• [147]. However, the adhesion strength varied over time, sometimes reaching values even close to 100 N·cm−2, which is higher than to be expected from van der Waals forces. The non-uniform deposition of Ni–CN–Ni nanosheets caused by Marangoni flow was an important reason for the unstable value of the

• . Illustration of the possible structure of water inside the Ni–CN–Ni nanosheets. The green balls represent carbon. The red balls represent nickel. The yellow balls represent nitrogen. The blue balls represent oxygen. The gray balls represent hydrogen. Figure 9 was used with permission of The Royal Society of

Nanoarchitectonics of the cathode to improve the reversibility of Li–O₂ batteries

• Hien Thi Thu Pham,
• Jonghyeok Yun,
• So Yeun Kim,
• Sang A Han,
• Jung Ho Kim,
• Jong-Won Lee and
• Min-Sik Park

Beilstein J. Nanotechnol. 2022, 13, 689–698, doi:10.3762/bjnano.13.61

• deionized water by horn sonication for 1 h. The suspension was filtered through a glass-fiber membrane (pore diameter of 1.2 μm) without any polymeric binder and conductive agent. The active area and mass loading of the cathode were 0.785 cm2 and 1.0 mg·cm−2, respectively. Porous Ni foam was placed on the

Approaching microwave photon sensitivity with Al Josephson junctions

• Andrey L. Pankratov,
• Anna V. Gordeeva,
• Leonid S. Revin,
• Dmitry A. Ladeynov,
• Anton A. Yablokov and
• Leonid S. Kuzmin

Beilstein J. Nanotechnol. 2022, 13, 582–589, doi:10.3762/bjnano.13.50

• , the bias current of the junction was ramped up at a constant rate. The voltage was measured using a low-noise room-temperature differential amplifier AD745 and was fed to a high-speed NI ADC card. The switching current histograms were collected in the temperature range between 1 K and 30 mK. The

Stimuli-responsive polypeptide nanogels for trypsin inhibition

• Petr Šálek,
• Jana Dvořáková,
• Sviatoslav Hladysh,
• Diana Oleshchuk,
• Ewa Pavlova,
• Jan Kučka and
• Vladimír Proks

Beilstein J. Nanotechnol. 2022, 13, 538–548, doi:10.3762/bjnano.13.45

• equations: where ni and Di are the number and diameter of the i-th microsphere, respectively. 125I-radiolabeling and loading and release of BSA and AAT A solution of BSA (10 mg), or AAT (10 mg), in PBS buffer (400 µL, pH 7.4) was reacted with [125I]-NaI solution (155 MBq) for 30 min in the presence of two

Electrostatic pull-in application in flexible devices: A review

• Teng Cai,
• Yuming Fang,
• Yingli Fang,
• Ruozhou Li,
• Ying Yu and
• Mingyang Huang

Beilstein J. Nanotechnol. 2022, 13, 390–403, doi:10.3762/bjnano.13.32

• . A pyroelectric high-voltage generator (PHVG) system can produce voltages up to several kilovolts, which is an important power supply system for microscale robotics. Ni et al. [100] proposed a PHVG system composed of lithium niobate and a PZT cantilever switch, as shown in Figure 13. Lithium niobate

Interfacial nanoarchitectonics for ZIF-8 membranes with enhanced gas separation

• Season S. Chen,
• Zhen-Jie Yang,
• Chia-Hao Chang,
• Hoong-Uei Koh,
• Sameerah I. Al-Saeedi,
• Kuo-Lun Tung and
• Kevin C.-W. Wu

Beilstein J. Nanotechnol. 2022, 13, 313–324, doi:10.3762/bjnano.13.26

• kept at room temperature (25 °C). The permeance Pi (mol·m−2·s−1·Pa−1) of the permeation gas was determined using the following equation: where Ni (mol·s−1) is the permeation molar flow rate of component gas i, ΔPi (Pa) is the trans-membrane pressure drop of gas i, and A (m2) is the effective membrane

Investigation of a memory effect in a Au/(Ti–Cu)Ox-gradient thin film/TiAlV structure

• Damian Wojcieszak,
• Jarosław Domaradzki,
• Michał Mazur,
• Tomasz Kotwica and
• Danuta Kaczmarek

Beilstein J. Nanotechnol. 2022, 13, 265–273, doi:10.3762/bjnano.13.21

• ]. The most commonly used material in resistive switching devices is TiO2−x [33][34][35][36][37][38]. In addition to the oxide layers, the material used for metal electrodes plays another crucial role in the resistive switching mechanism. Usually, materials such as Au, Ag, Ni, Ti, W, TiN, or ITO are used

Relationship between corrosion and nanoscale friction on a metallic glass

• Haoran Ma and
• Roland Bennewitz

Beilstein J. Nanotechnol. 2022, 13, 236–244, doi:10.3762/bjnano.13.18

• nanoscale is crucially important. Microscale bearings made of Ni-based MGs lasted four times longer than those machined from sintered alloy [12]. Corrosive degradation, as one of the major failure mechanisms of metals and alloys, is an important issue in engineering applications of MGs. Protective oxide

Low-energy electron interaction and focused electron beam-induced deposition of molybdenum hexacarbonyl (Mo(CO)₆)

• Po-Yuan Shih,
• Maicol Cipriani,
• Christian Felix Hermanns,
• Jens Oster,
• Klaus Edinger,
• Armin Gölzhäuser and
• Oddur Ingólfsson

Beilstein J. Nanotechnol. 2022, 13, 182–191, doi:10.3762/bjnano.13.13

• these are commercially available, have comparatively high vapor pressure and are fairly stable and easy to handle. Correspondingly metal carbonyl complexes, including the mononuclear Ni(CO)4, Cr(CO)6, Fe(CO)5, W(CO)6 and Mo(CO)6, have been used as precursors to deposit metals on surfaces through FEBID

Sputtering onto liquids: a critical review

• Anastasiya Sergievskaya,
• Adrien Chauvin and
• Stephanos Konstantinidis

Beilstein J. Nanotechnol. 2022, 13, 10–53, doi:10.3762/bjnano.13.2

Biocompatibility and cytotoxicity in vitro of surface-functionalized drug-loaded spinel ferrite nanoparticles

• Sadaf Mushtaq,
• Khuram Shahzad,
• Tariq Saeed,
• Anwar Ul-Hamid,
• Bilal Haider Abbasi,
• Nafees Ahmad,
• Waqas Khalid,
• Muhammad Atif,
• Zulqurnain Ali and
• Rashda Abbasi

Beilstein J. Nanotechnol. 2021, 12, 1339–1364, doi:10.3762/bjnano.12.99

• (MFe2O4, where M = Fe, Co, Ni, or Zn) nanoparticles (NPs) were developed as carriers of the anticancer drugs doxorubicin (DOX) and methotrexate (MTX). Physical characterizations confirmed the formation of pure cubic structures (14–22 nm) with magnetic properties. Drug-loaded NPs exhibited tumor

• adverse interactions with hemoglobin [13]. Magnetic spinel ferrites nanoparticles (MSFNPs) with a general formula of MFe2O4 (where M = divalent cation of Co, Ni, Zn, Mn, or Mg) are soft magnetic materials with a face-centered cubic structure [14]. Among those, cobalt ferrite NPs have a large

• chemistry of NPs, thereby affecting their physiochemical and biological properties [11][20]. In the present work, we synthesized a variety of MFe2O4 (M = Co, Ni, and Zn) NPs using the sonochemical technique. Particle agglomeration was prevented by using oleic acid as the surfactant [21]. Phase change of

Morphology-driven gas sensing by fabricated fractals: A review

• Vishal Kamathe and
• Rupali Nagar

Beilstein J. Nanotechnol. 2021, 12, 1187–1208, doi:10.3762/bjnano.12.88

• fractal dimension of 1.79. Tungsten oxide-based fractals A very recent study on the sensing of NO2, acetone, and carbon monoxide was reported by Simon and co-workers. They used Ni nanoparticles to decorate a reduced graphene oxide/WO3 nanocomposite [78]. The WO3 sample annealed at 600 °C shows the

Self-assembly of amino acids toward functional biomaterials

• Huan Ren,
• Lifang Wu,
• Lina Tan,
• Yanni Bao,
• Yuchen Ma,
• Yong Jin and
• Qianli Zou

Beilstein J. Nanotechnol. 2021, 12, 1140–1150, doi:10.3762/bjnano.12.85

• cancer cells [50]. Furthermore, naphthalimide (NI) derivatives can also be used as end-capping materials for amino acids. Naphthalimide has unique photophysical properties and photostability as a luminescent material for aggregation-induced emission (AIE), which can display high emission properties in

• the aggregated state and can be used for imaging [51]. Importantly, NI exhibits hydrophobicity and π–π stacking due to the aromatic moieties, and is prone to dynamic aggregation, which can be used in self-assembled construction units [52]. For example, Hsu et al. [53] self-assembled NI and

• phenylalanine to produce hydrogels driven by hydrogen bonds and π–π interactions and to form microfiber three-dimensional networks at 1 wt % and pH 7.4. The microfibers have AIE properties and strong blue emission under an ultraviolet lamp. Ni-terminated hydrogels of NI-Phe exhibit viscoelasticity with a

Criteria ruling particle agglomeration

• Dieter Vollath

Beilstein J. Nanotechnol. 2021, 12, 1093–1100, doi:10.3762/bjnano.12.81

• ensembles of particles, these two descriptions are identical. The Boltzmann entropy S is given by S = k·ln(W), with k the Boltzmann constant. For an ensemble consisting of N elements subdivided in I groups, each one consisting of ni elements, the number of possibilities W is described as: In the further

• discussions, for simplicity, instead of the entropy S, a reduced entropy S* = S/k is used. After applying Stirling’s equation, for large numbers of particles, the Boltzmann entropy may be rewritten as: Setting ni/N = pi, one obtains the Gibbs entropy of mixing: Equation 2 and Equation 3 demonstrate that, in

• , the approximation with an exponential function Ni = a·exp(−bi), where a and b are parameters describing the distribution function, is depicted. The variable i stands for the volume of the particles in multiples of the initial particle size. Except for particle numbers of less than 20 one realizes a

Assessment of the optical and electrical properties of light-emitting diodes containing carbon-based nanostructures and plasmonic nanoparticles: a review

• Keshav Nagpal,
• Erwan Rauwel,
• Frédérique Ducroquet and
• Protima Rauwel

Beilstein J. Nanotechnol. 2021, 12, 1078–1092, doi:10.3762/bjnano.12.80

• various metal nanostructures for improved performance. Figure 3 presents optical images of GaN-based blue LED and UV LED with different current-spreading layers (ITO, Ni on graphene, and graphene) [42]. For a particular injection current value, the turn-on voltages for blue LED recorded on various anodes

• were 3.5 (ITO), 6.2 (graphene), and 4.8 V (Ni on graphene). However, for UV LED, the observed operating voltage reduced significantly from 13.2 (graphene) to 7.1 V (Ni on graphene). Even though the ITO anode remained superior, the Ni–graphene nanocomposite nevertheless displayed 83% of the EL intensity

• under different current-spreading layers (ITO, Ni on graphene, and graphene) at 1 and 20 mA current injections, respectively. Figure 3a and Figure 3b were adapted from [42], with the permission of AIP Publishing. This content is not subject to CC BY 4.0. (a) EL spectra of LED having 2 and 5 nm Au–CNT

Progress and innovation of nanostructured sulfur cathodes and metal-free anodes for room-temperature Na–S batteries

• Marina Tabuyo-Martínez,
• Bernd Wicklein and
• Pilar Aranda

Beilstein J. Nanotechnol. 2021, 12, 995–1020, doi:10.3762/bjnano.12.75

• capacity of these electrodes depends on two mechanisms, the deposition/stripping of Na and the insertion/extraction of Na+. Metal scaffolds and meshes fabricated from Cu, Ni, Ni@Cu, or Al are other materials onto which Na can be plated. As shown in a recent work, porous Ni structures formed on Cu foil

• served as 3D current collector for plating Na [71]. Porous Al current collectors are also interesting Na plating substrates due to the lower weight and cost of Al compared to Cu and Ni. The resultant Al/Na anodes displayed high cycle stability (1000 cycles) with minimal Coulombic efficiency loss [72

• intermetallic compounds (M-Sn/Sb/P with M = Sn, Sb, P, Si, Bi, Cu, Ni, Fe, Zn). Fully sodiated Sb, Sn, and P form the phases Na3Sb, Na15Sn4, and Na3P, which offer theoretical capacities of 660, 847 and 2596 mAh·g−1, respectively [73]. However, the measured values are usually somewhat lower due to cycle

Uniform arrays of gold nanoelectrodes with tuneable recess depth

• Elena O. Gordeeva,
• Ilya V. Roslyakov,
• Alexey P. Leontiev,
• Alexey A. Klimenko and
• Kirill S. Napolskii

Beilstein J. Nanotechnol. 2021, 12, 957–964, doi:10.3762/bjnano.12.72

• of Ni [24] and Cu [27] in AAO templates. Cross-sectional SEM images were used for the estimation of the position of the main growth front of nanowires (see dashed red lines in Figure 2c–e) at the final stage of the templated electrodeposition. It can be seen that the main growth front is below the

Molecular assemblies on surfaces: towards physical and electronic decoupling of organic molecules

• Sabine Maier and
• Meike Stöhr

Beilstein J. Nanotechnol. 2021, 12, 950–956, doi:10.3762/bjnano.12.71

• successfully employed hBN to investigate the pristine properties of particular molecules. Schaal et al. [86] showed that hBN on Ni(111) electronically decoupled tetraphenyldibenzoperiflanthene such that the molecular vibronic progression was observable by in situ differential reflectance spectroscopy, which is

• otherwise only achieved for multilayers on the bare Ni. On hBN/Cu(111), Zimmermann et al. [87] could visualize the molecular orbitals of pyrene derivatives by STM at the submolecular level, while Brülke et al. [88] measured the fluorescence of monolayer perylenetetracarboxylic dianhydride (PTCDA), which is

In situ transport characterization of magnetic states in Nb/Co superconductor/ferromagnet heterostructures

• Olena M. Kapran,
• Roman Morari,
• Taras Golod,
• Evgenii A. Borodianskyi,
• Vladimir Boian,
• Andrei Prepelita,
• Nikolay Klenov,
• Anatoli S. Sidorenko and
• Vladimir M. Krasnov

Beilstein J. Nanotechnol. 2021, 12, 913–923, doi:10.3762/bjnano.12.68

• polydomain state, which triggers the flux-flow phenomenon. With further increase of the field, the polydomain state gradually turns into the opposite P state. This picture is consistent with the assessment based on the Hall effect, Figure 1i, and MR analysis, Figure 2, and with earlier FORC analysis of Ni

Effects of temperature and repeat layer spacing on mechanical properties of graphene/polycrystalline copper nanolaminated composites under shear loading

• Chia-Wei Huang,
• Man-Ping Chang and
• Te-Hua Fang

Beilstein J. Nanotechnol. 2021, 12, 863–877, doi:10.3762/bjnano.12.65

• nanoplatelets (GNPs) in a copper matrix the in-plane tensile strength was increased by 26% [17]. Li et al. used graphene nanoplatelets decorated with Ni nanoparticles as addition in a Cu matrix. These Ni-GPL/Cu composites exhibited a 42% increase in ultimate tensile strength (UTS) over that of pure Cu, with

• only 0.8 vol % of Ni-GPLs [18]. Jiang et al. demonstrated that a pristine graphene (PG)/Cu composite showed a 90% enhancement of yield strength, and 81% increase of compression strength compared to pure copper [19]. Graphene is regarded as a reinforcement component in composites; it has been confirmed

Comprehensive review on ultrasound-responsive theranostic nanomaterials: mechanisms, structures and medical applications

• Sepand Tehrani Fateh,
• Lida Moradi,
• Elmira Kohan,
• Michael R. Hamblin and
• Amin Shiralizadeh Dezfuli

Beilstein J. Nanotechnol. 2021, 12, 808–862, doi:10.3762/bjnano.12.64

Local stiffness and work function variations of hexagonal boron nitride on Cu(111)

• Abhishek Grewal,
• Yuqi Wang,
• Matthias Münks,
• Klaus Kern and
• Markus Ternes

Beilstein J. Nanotechnol. 2021, 12, 559–565, doi:10.3762/bjnano.12.46

• well-controlled adsorption and electronic properties [11][12][13][14][15][16][17][18]. In such systems, h-BN shows a rich structural and electronic morphology, which depends on the lattice mismatch and the interaction strength with the substrate: Large and flat lattice-matched terraces for h-BN/Ni(111