One-step chemical vapor deposition synthesis and supercapacitor performance of nitrogen-doped porous carbon–carbon nanotube hybrids

• Egor V. Lobiak,
• Lyubov G. Bulusheva,
• Ekaterina O. Fedorovskaya,
• Yury V. Shubin,
• Pavel E. Plyusnin,
• Pierre Lonchambon,
• Boris V. Senkovskiy,
• Zinfer R. Ismagilov,
• Emmanuel Flahaut and
• Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 2669–2679, doi:10.3762/bjnano.8.267

• over magnesium-oxide-supported metal catalysts. CNx nanotubes were grown on Co/Mo, Ni/Mo, or Fe/Mo alloy nanoparticles, and MgO grains served as a template for the porous carbon. The simultaneous formation of morphologically different carbon structures was due to the slow activation of catalysts for

• ]. With the purpose to study the effect of the nature of the transition metal on the nitrogen content and the structure of the porous carbon–MWCNT hybrid, we used cluster-type polyoxomolybdates of Co, Ni, and Fe as catalyst precursors. In earlier work, we have shown that the thermal decomposition of such

• )12{Ni(H2O)3}4 and Mo12O28(μ2-OH)12{Co(H2O)3}4 and the Keplerate-type structure [Н4Мо72Fе30O254(СН3СОО)10{Мо2O7(Н2O))(Н2Мо2O8(Н2O)}3(Н2O)87] as precursors. The compounds were synthesized following the procedures described elsewhere [23][24]. An aqueous suspension of a compound was stirred with MgO

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

• localized production of single-walled CNTs. Also the combination of Fe(CO)5 and Co(CO)3NO as precursors in EBID might be worth investigating since binary mixtures of active catalysts such as Ni, Fe and Co are reported to exhibit higher activity than the individual elements [50]. A last topic to be mentioned

Ferrocholesteric–ferronematic transitions induced by shear flow and magnetic field

• Dmitriy V. Makarov,
• Alexander A. Novikov and
• Alexander N. Zakhlevnykh

Beilstein J. Nanotechnol. 2017, 8, 2552–2561, doi:10.3762/bjnano.8.255

• and are, respectively, density, velocity, and stress tensor of a ferrocholesteric liquid crystal; is the total time derivative. Here and below we assume summation over repeated tensor indices. The viscous stress tensor , included in the stress tensor σki, has the form where ni is the director of the

• CLC and αs are the Leslie viscosity coefficients [13] bound by Parodi’s relation α2 + α3 = α6 − α5. The vector Ni = dni/dt − Ωiknk determines the rate of change of the director ni relative to the moving medium. The tensors and represent the symmetric and antisymmetric parts of the velocity gradient

Fabrication of CeO₂–MO_x (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

• Ling Liu,
• Jingjing Shi,
• Hongxia Cao,
• Ruiyu Wang and
• Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

• , Xuzhou 221008, People’s Republic of China School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, People’s Republic of China 10.3762/bjnano.8.241 Abstract CeO2–MOx (M = Cu, Co, Ni) composite yolk–shell nanospheres with uniform size were fabricated by a

• mixed oxides with well-defined morphology, tunable chemical composition and distribution, and desirable physico-chemical properties. Herein, we report a general approach to fabricate uniform CeO2–MOx (M = Cu, Co, Ni) composite yolk–shell nanospheres with highly dispersed MOx species, in which CeO2 yolk

• , which is favorable for the synergistic interaction between CeO2 and CuOx, can clearly be seen. Ce–Co and Ce–Ni composite oxide nanostructures were prepared by a similar solvothermal process in which CeO2 yolk–shell nanospheres were mixed with Co(CH3COO)2 or Ni(CH3COO)2 in ethanol solution. Spherical

Numerical investigation of the tribological performance of micro-dimple textured surfaces under hydrodynamic lubrication

• Kangmei Li,
• Dalei Jing,
• Jun Hu,
• Xiaohong Ding and
• Zhenqiang Yao

Beilstein J. Nanotechnol. 2017, 8, 2324–2338, doi:10.3762/bjnano.8.232

• CFD method were compared against those based on the Reynolds equations. It was found that when the groove depth is greater than ten percent of the film thickness, the method based on the Reynolds equations is no longer applicable. Shi and Ni [24] developed a two-dimensional CFD model to investigate

Molecular dynamics simulations of nanoindentation and scratch in Cu grain boundaries

• Shih-Wei Liang,
• Ren-Zheng Qiu and
• Te-Hua Fang

Beilstein J. Nanotechnol. 2017, 8, 2283–2295, doi:10.3762/bjnano.8.228

• and adhesion when a probe touches the substrate) between Ni (probe) and Au (thin film substrate) under nanoindentation conditions using MD simulations. Moreover, Mulliah et al. [18] analyzed the friction coefficient, the dislocation, and related parameters of the nanostructure under nanoscratch

Dissociative electron attachment to coordination complexes of chromium: chromium(0) hexacarbonyl and benzene-chromium(0) tricarbonyl

• Janina Kopyra,
• Paulina Maciejewska and
• Jelena Maljković

Beilstein J. Nanotechnol. 2017, 8, 2257–2263, doi:10.3762/bjnano.8.225

• compounds such as Ni(CO)4, Fe(CO)5, W(CO)6, Mo(CO)6, and Cr(CO)6 the rate constants at thermal energy are extremely high and range from 1–3 × 10−7 cm3·molecule−1·s−1 [13]. These values approach the maximum (s-wave) thermal attachment rate constant of 5 × 10−7 cm3·molecule−1·s−1 at a temperature of 298 K [20

• reaction channel decreases with the number of carbonyl groups that are detached from the TNI to form the respective anions. This behavior has already been reported from DEA to metal carbonyls (e.g., Ni(CO)4, Fe(CO)5, Cr(CO)6, Mo(CO)6, W(CO)6) [32], as well as from cobalt tricarbonylnitrosyl [9], and π

The interplay between spin densities and magnetic superexchange interactions: case studies of mono- and trinuclear bis(oxamato)-type complexes

• Azar Aliabadi,
• Bernd Büchner,
• Vladislav Kataev and
• Tobias Rüffer

Beilstein J. Nanotechnol. 2017, 8, 2245–2256, doi:10.3762/bjnano.8.224

• complex, which usually should be even isomorphic. The single crystals itself should be large enough in order to be able to manipulate them reliably. In an initial study we co-crystallized a Cu(II)-containing type-II complex in the host lattice of the corresponding Ni(II) complex [42]. In doing so, we

• way as those of the individual complexes. There are no additional arrangements to be made. It seems likely, that the isostructural Ni(II) and Cu(II) complexes should be isomorphic as well in order to obtain diamagnetically diluted single crystals. Based on our experiments performed so far we cannot

• this Thematic Series, namely the synthesis and characterization of heterotrinuclear Cu(II)Ni(II)Cu(II) bis(oxamidato)-type complexes [52]. Chemical structures of reviewed pairs of diamagnetic Ni(II) and the corresponding Cu(II) complexes. Top: Schematic representation of the successful co

Electronic structure, transport, and collective effects in molecular layered systems

• Torsten Hahn,
• Tim Ludwig,
• Carsten Timm and
• Jens Kortus

Beilstein J. Nanotechnol. 2017, 8, 2094–2105, doi:10.3762/bjnano.8.209

• (111) and Ni(111) surfaces. We have investigated a F16CoPc/MnPc heterostructure, which exhibits ground-state charge and spin transfer. We compare the results to a CoPc/CoPc reference structure, which does not show spin and charge transfer effects in the ground state. For both organic materials, we

• assume β-stacking [25]. The selected Au surface is known to form metal–organic contacts with medium interactions [26]. On the other hand, pure Ni surfaces are known to have a very high reactivity that sometimes lead to decomposition of the deposited organic material [27][28]. The reactivity of the Ni

• larger bias voltages. The same methodology is applied to the second model system, where the two different molecular stacks are in contact with magnetic Ni(111) leads. The quantity of interest for possible applications is the tunnel magnetoresistance (TMR), which can be obtained directly from I–V

Intercalation of Si between MoS₂ layers

• Rik van Bremen,
• Qirong Yao,
• Soumya Banerjee,
• Deniz Cakir,
• Nuri Oncel and
• Harold J. W. Zandvliet

Beilstein J. Nanotechnol. 2017, 8, 1952–1960, doi:10.3762/bjnano.8.196

• photoelectron spectroscopy (XPS) [31]. It should be pointed out here that this study showed that the S 2p3/2 peak in MoS2 is at around 167.6 eV, which is considerably higher than the pure core-level line of pure S. This high value might be an indication of contamination with O [32] or Ni [33]. Here we revisit

Freestanding graphene/MnO₂ cathodes for Li-ion batteries

• Şeyma Özcan,
• Aslıhan Güler,
• Tugrul Cetinkaya,
• Mehmet O. Guler and
• Hatem Akbulut

Beilstein J. Nanotechnol. 2017, 8, 1932–1938, doi:10.3762/bjnano.8.193

• density of Li-ion batteries is desired in order to store more, efficient energy. Although researchers have made significant progress in the development of high capacity anode electrodes, such as SnO2 [2], Sn-Ni [3], and Si [4], the performance of cathodes has been bottlenecked by the energy density and

Optical techniques for cervical neoplasia detection

• Tatiana Novikova

Beilstein J. Nanotechnol. 2017, 8, 1844–1862, doi:10.3762/bjnano.8.186

Synthesis and functionalization of NaGdF₄:Yb,Er@NaGdF₄ core–shell nanoparticles for possible application as multimodal contrast agents

• Dovile Baziulyte-Paulaviciene,
• Vitalijus Karabanovas,
• Marius Stasys,
• Greta Jarockyte,
• Vilius Poderys,
• Simas Sakirzanovas and
• Ricardas Rotomskis

Beilstein J. Nanotechnol. 2017, 8, 1815–1824, doi:10.3762/bjnano.8.183

• equations: where ni and Di are the number and diameter of the particle, respectively. Dynamic light scattering (DLS) was used to determine the hydrodynamic particle diameter and zeta potential. These experiments were performed with Brookhaven ZetaPALS zeta potential analyzer (Brookhaven Instruments, USA

• ). Powder X-ray diffraction (XRD) analysis has been carried out by employing a Rigaku MiniFlex II diffractometer working in the Bragg–Brentano (θ/2θ) geometry. The data were collected within a 2θ angle from 10° to 65° at a step of 0.01° and scanning speed of 10 °/min using the Ni-filtered Cu Kα line. The

(Metallo)porphyrins for potential materials science applications

• Lars Smykalla,
• Carola Mende,
• Michael Fronk,
• Pablo F. Siles,
• Michael Hietschold,
• Georgeta Salvan,
• Dietrich R. T. Zahn,
• Oliver G. Schmidt,
• Tobias Rüffer and
• Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 1786–1800, doi:10.3762/bjnano.8.180

• (metallo)phthalocyanines as the organic part and different inorganic materials has been the explored with respect to its application potential in a comprehensive recent review [43]. Results Local electrical transport characteristics and morphology characteristics of nanostructured CuTPP(OMe)4 on Ni

• rate 5 Å/min, temperature 325 °C) on a 30 nm thick nickel bottom electrode on top of a Si(100)/SiO2 wafer (Figure 2). Here, Ni substrates were selected for the growth of CuTPP(OMe)4 in order to investigate a system that may possess valuable possibilities for future device applications, in which the

• mechanism of the organic material. A shadow mask during deposition was employed to avoid additional photolithography processing. This shadow mask also allows for the formation of thin molecular dendrites and even single dendrites on the Ni surface (Figure 2). The growth conditions of the dendrites were

Methionine-mediated synthesis of magnetic nanoparticles and functionalization with gold quantum dots for theranostic applications

• Arūnas Jagminas,
• Agnė Mikalauskaitė,
• Vitalijus Karabanovas and
• Jūrate Vaičiūnienė

Beilstein J. Nanotechnol. 2017, 8, 1734–1741, doi:10.3762/bjnano.8.174

• -sample magnetometer calibrated by a Ni sample of similar dimensions as the studied sample. The magnetometer was composed of the vibrator, the lock-in amplifier, and the electromagnet. The magnetic field was measured by a testameter FH 54 (Magnet-Physics Dr. Steingrover GmbH). a) TEM image of cobalt

Near-infrared-responsive, superparamagnetic Au@Co nanochains

• Varadee Vittur,
• Arati G. Kolhatkar,
• Shreya Shah,
• Irene Rusakova,
• Dmitri Litvinov and
• T. Randall Lee

Beilstein J. Nanotechnol. 2017, 8, 1680–1687, doi:10.3762/bjnano.8.168

• magnetic properties and their greater stability toward oxidation compared to Ni- and Fe-based magnetic nanoparticles [23]. Notably, there have been a handful of studies on magneto-optical nanostructures consisting of cobalt coated with gold. Bao and co-workers synthesized magnetic Co–Au core–shell

Surface functionalization of 3D-printed plastics via initiated chemical vapor deposition

• Christine Cheng and
• Malancha Gupta

Beilstein J. Nanotechnol. 2017, 8, 1629–1636, doi:10.3762/bjnano.8.162

• introduced into the reactor using a mass flow controller (MKS Type 1152C). Immediately before polymer deposition, the stage temperature was raised to the appropriate temperature for deposition, which was 35 °C unless otherwise stated. During deposition, a nichrome filament (Omega Engineering, 80%/20% Ni/Cr

High-speed dynamic-mode atomic force microscopy imaging of polymers: an adaptive multiloop-mode approach

• Juan Ren and
• Qingze Zou

Beilstein J. Nanotechnol. 2017, 8, 1563–1570, doi:10.3762/bjnano.8.158

• and implemented in a Matlab xPC-target (R2010a) system, and applied to the AFM imaging through a computer-based data acquisition system (NI-6259, National Instrument, sampling frequency: 20 kHz). The AFM system was modified to allow for direct acquisition of all the required sensor signals and direct

Low-temperature CO oxidation over Cu/Pt co-doped ZrO₂ nanoparticles synthesized by solution combustion

• Amit Singhania and
• Shipra Mital Gupta

Beilstein J. Nanotechnol. 2017, 8, 1546–1552, doi:10.3762/bjnano.8.156

• , different types of catalysts including monometallic (e.g., Pt, Pd, Rh, Au, Ni, Co and Sn), bimetallic (e.g., Pd–Au, Pd–Rh, Pt–Co, Cu–Rh, Au–Cu and Au–Ag) along with various types of supports (e.g., CeO2, SiO2, Al2O3, Co3O4, Fe2O3, activated carbon (AC), carbon nanotubes (CNTs) and ZrO2) have been reported

• ZrO2-based composite showed very high catalytic activity [23]. The addition of Pt, Ni, Rh and Cu into the support result in an increase in oxygen vacancies, oxygen storage capacity, smaller particle size, high specific surface area, and better stability of the material [24][25][26][27][28]. Recently

Formation of ferromagnetic molecular thin films from blends by annealing

• Peter Robaschik,
• Ye Ma,
• Salahud Din and
• Sandrine Heutz

Beilstein J. Nanotechnol. 2017, 8, 1469–1475, doi:10.3762/bjnano.8.146

• microscope using a 100× objective. The crystal structure was studied by using a Panalytical X’Pert PRO MPD X-Ray diffractometer (Ni filtered Cu Kα radiation at 40 kV and 40 mA) operated in the θ–2θ mode. The background was subtracted using the Sonneveld method [35]. The composition of the films was

Deposition of exchange-coupled dinickel complexes on gold substrates utilizing ambidentate mercapto-carboxylato ligands

• Martin Börner,
• Laura Blömer,
• Marcus Kischel,
• Peter Richter,
• Georgeta Salvan,
• Dietrich R. T. Zahn,
• Pablo F. Siles,
• Maria E. N. Fuentes,
• Carlos C. B. Bufon,
• Daniel Grimm,
• Oliver G. Schmidt,
• Daniel Breite,
• Bernd Abel and
• Berthold Kersting

Beilstein J. Nanotechnol. 2017, 8, 1375–1387, doi:10.3762/bjnano.8.139

• susceptibility measurements (for 7 and 8) and (broken symmetry) density functional theory (DFT) calculations. An S = 2 ground state is demonstrated by temperature-dependent susceptibility and magnetization measurements, achieved by ferromagnetic coupling between the spins of the Ni(II) ions in 7 (J = +22.3 cm−1

• surely validate the atom connectivity of the [Ni2L(L’)]+ complex and the binding mode of the coligands. Figure 2 shows ORTEP and van der Waals representations of the structure of the [Ni2L(HL4)]+ cation in 6, with the mercaptohexanoate unit bridging the two Ni(II) ions in a symmetrical fashion as

• complex at 300 K increases from 4.78·μB (8: 4.80 μB) at 300 K to a maximum value of 5.36 μB at 23 K (8: 5.27 μB). On lowering the temperature further the magnetic moment decreases to 4.60 μB (or 4.34 μB) at 2 K. This behavior suggests that the electron spins on the two Ni(II) (S = 1) ions are coupled by

Characterization of ferrite nanoparticles for preparation of biocomposites

• Urszula Klekotka,
• Magdalena Rogowska,
• Dariusz Satuła and
• Beata Kalska-Szostko

Beilstein J. Nanotechnol. 2017, 8, 1257–1265, doi:10.3762/bjnano.8.127

• nanoparticles with nominal composition Me0.5Fe2.5O4 (Me = Co, Fe, Ni or Mn) have been successfully prepared by the wet chemical method. The obtained particles have a mean diameter of 11–16 ± 2 nm and were modified to improve their magnetic properties and chemical activity. The surface of the pristine

• of main importance while its application is considered. Therefore, in this paper, we selected four types of ferrite nanoparticles (magnetite, and magnetite doped with Ni, Co, or Mn elements, respectively), and studies on the immobilization of biologically active particles were done. For this purpose

• Ni ions influence the crystallization process (which turned out to be slower in comparison to Fe). This observation explains the observed differences in the Mössbauer spectra from those presented in previous studies [17]. Energy dispersive X-ray analysis (EDX) To confirm the substitution of Fe by

Synthesis, spectroscopic characterization and thermogravimetric analysis of two series of substituted (metallo)tetraphenylporphyrins

• Rasha K. Al-Shewiki,
• Carola Mende,
• Roy Buschbeck,
• Pablo F. Siles,
• Oliver G. Schmidt,
• Tobias Rüffer and
• Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 1191–1204, doi:10.3762/bjnano.8.121

• yields exceeding 80%. The porphyrins 2 and 3 could be converted to the corresponding metalloporphyrins MTPP(C(O)NR2)4 (R = Me/iPr for M = Zn (2a, 3a); Cu (2b, 3b); Ni (2c, 3c); Co (2d, 3d)) by the addition of 3 equiv of anhydrous MCl2 (M = Zn, Cu, Ni, Co) to dimethylformamide solutions of 2 and 3 at

• porphyrins of the type H2TPP(OH)4 (tetra(p-hydroxyphenyl)porphyrin) [6][7] and MTPP(OMe)4/H2TPP(OMe)4 (tetra(p-methoxyphenyl)porphyrin) (M = Cu [8][9], Ni [9]), cf. Figure 1. The properties of the metalloporphyrins are governed by the (transition) metal ions and the exocyclic moieties on the individual

• , with H2TPP(C(O)NMe2)4 (2) and MTPP(C(O)N(iPr)2)4 (M = Zn (2a), Cu (2b), Ni (2c), Co (2d); R = iPr, with H2TPP(C(O)N(iPr)2)4 (3) and MTPP(C(O)N(iPr)2)4 (M = Zn (3a), Cu (3b), Ni (3c), Co (3d)). The aim of this report is not only to describe their synthesis and characterization (ESIMS, FTIR, NMR, UV–vis

Atomic structure of Mg-based metallic glass investigated with neutron diffraction, reverse Monte Carlo modeling and electron microscopy

• Rafał Babilas,
• Dariusz Łukowiec and
• Laszlo Temleitner

Beilstein J. Nanotechnol. 2017, 8, 1174–1182, doi:10.3762/bjnano.8.119

• materials with good functional properties [1][2][3]. Many chemical compositions of metallic glasses based on Mg have been extensively reported in recent years [4][5][6][7], but among all the studied glassy materials, the Mg-TM-RE (TM – transition metal: Cu, Ni, Zn, Ag; RE – rare-earth transition metal: Y

• copper mold casting exhibited bulk form with a diameter up to 4 mm. Ren et al. [15] studied the impact of Ni on the Mg65Cu25−xY10Nix (x = 0, 3, 6 atom %) alloy system due to the growth of crystalline phases and the formation of an amorphous structure. They also found that a small amount of Ni could

• in the form of ribbons with a thickness of 0.08 mm and a width of 10 mm by the melt spinning (MS) technique [16][17][18]. The master alloys as starting materials for MS casting were achieved by the induction melting of pure Mg, Cu, Y and Ni under an argon atmosphere. During the MS, the metallic

The integration of graphene into microelectronic devices

• Guenther Ruhl,
• Sebastian Wittmann,
• Matthias Koenig and
• Daniel Neumaier

Beilstein J. Nanotechnol. 2017, 8, 1056–1064, doi:10.3762/bjnano.8.107

• carbon in nickel at high temperatures and removing the metal after the deposition process. Here carbon is introduced into Ni by deposition of C/Ni sandwich layers or by ion implantation [28] or dissolution of carbon into nickel in a plasma-enhanced CVD process [29]. Upon heating up to about 1000 °C

• carbon dissolves in Ni with a substantial solubility and during cooling down it segregates to the Ni–substrate interface where it precipitates as graphene. After etching off the nickel, the graphene film is exposed. The complete process sequence is shown in Figure 2 [29]. By choosing the appropriate

• temperature profile and C/Ni ratio the number of graphene layers can be controlled. However, process control is difficult and Ni grain boundaries can lead to an inhomogeneous thickness distribution of the graphene layer. A similar approach utilizes the diffusion of carbon species from a CVD atmosphere along